Squashed 'third_party/rules_rust/' changes from bf59038cac..078c6908fc

078c6908fc add cc_common.link support for rust_library and rust_test (#1490)
c07aef0287 Skip supplying rpaths on Fuchsia (#1511)
6ee7c80bdb Propagate rustc_env{,_files} from rust_test.crate (#1443)
1cd0788d2a Apply get_lib_name correctly to the C++ runtime libraries (#1508)
90808f0dc4 Minor cleanup to documentation (#1505)
735640f2df Enable rust-analyzer tests on windows. (#1506)
0f34573166 Updated rules_rust to version 0.9.0 (#1503)
9b61b49934 Promoted crate_universe to non-experimental (#1504)
76360dd354 Implement rules archive release artifact in github action. (#1501)
4e5fac5980 Do not pass `--Clink-arg=-l` for libstd and libtest (#1500)
6c38934636 pipelining: add the ability to disable pipelining for a single rule. (#1499)
867fc37c17 rules_rust: enable pipelined compilation. (#1275)
c97f255dfe Delete deprecated targets (#1496)
43b42884a7 Updated examples to use crate_universe (#1494)
0ffde973e8 Updated `//util/import` to use crate_universe (#1492)
83a03ab03e Updated proto rules to fetch dependencies using crate_universe (#1491)
67e204ff22 fix: `rust_doc_test` failure to find params file (#1418)
0fc834bdfa Updated all toolchain_type definitions to be named `toolchain_type`. (#1479)
3be056a7a3 toolchain files: ensure test depends on std (#1486)
228ebfa6eb Updated rules_rust to version `0.8.1`. (#1484)
685dfda497 Fixed use of rust-analyzer with rust_static_library and rust_shared_library (#1482)
2d7f94543f Fix rust-analyzer being unable to find rust sysroot sources. (#1483)
81a77acde2 Updated rules_rust to version `0.8.0`. (#1472)
caad908848 Give useful error on missing workspace manifest (#1475)
0e86b9dd30 Added `rust_analyzer_toolchain` and repository rules for creating one (#1455)
838e4ea828 Update docs on lockfiles (#1477)
fce1222628 Fix typo in function name (#1478)
1929bfbc3e Added Rust version 1.62.1 (#1476)
9a8e878d3d Fix `rust_binary_without_process_wrapper` build with `--stamp` (#1473)
25baabc205 Updated bindgen version (#1470)
8c9d5c7051 Updated rust-analyzer generator to use clap (#1471)
6d8009dbc8 Update `//bindgen` to use `crate_universe` (#1440)
67c97d44ff Updated `tools/rust_analyzer` to use `crate_universe`. (#1448)
6c285eb28e Updated `wasm_bindgen` rules dependencies. (#1464)
82a437cc17 Fixed crate_universe lockfile checks for crates_repository rule (#1468)
e83d5f3c77 Limit coverage to requested files (#1467)
daff327ea7 Stamp only binaries by default (#1452)
adc80a301d Cleanup crate_universe dependency macros (#1460)
824b121acc Updated header of crate_universe generated files to include a regen command (#1461)
d44e1d8363 feat: add `rustc_flags` attr to `rust_doc` rule (#1458)
6b54feb0ff add a way to distinguish proc-macro deps (#1420)
6070b3c9f4 Fixed missing items in distro artifact (#1450)
1e83e74159 do not add proc-macro deps to transitive_link_search_paths (#1424)
ced94dec1b Fix @libgit2 (#1457)
03d1d5e4ac Add extra_rustc_flag and extra_exec_rustc_flag (#1413)
711adc7985 crate_universe: shorten `crate_universe_crate_index` to `cui` (#1454)
8cb9247f18 Replaced small genrules with uses of bazel_skylib (#1451)
38e841aece Upgrade stardoc (#1444)
674762f66a Updated toolchain repository rules to represent one toolchain per repo (#1442)
b22a6e1416 Re-enable disabled windows jobs in CI (#1353)
2fb94c48fd docs: Update homepage to use latest version (#1441)
389c58fcb1 Updated rules_rust to version `0.7.0`. (#1436)
60f26d49d8 exclude `BUILD` and `WORKSPACE` files from generated crate_universe targets (#1437)
26344d4cd7 Have rust_test put its compilation outputs in a subdirectory (#1434)
8b0f644122 Updated crate_universe version to `0.4.0`. (#1435)
adf92b1534 update crate_universe `--repin` args to not require values. (#1433)
da75146d0a Do not attempt to instrument rust code for coverage if rust_toolchain.llvm-cov is None (#1432)
bde2c36821 Added Rust 1.62.0 (#1427)
7056f22bd0 Fixed crate_universe not finding target library names for "rlib"s (#1429)
3d65214d23 crate_universe support for individually updating packages. (#1426)
5a9d999db9 Updated `attr.label` attribute defaults to use `Label` constructor (#1422)
52fc70145a Added `TemplateVariableInfo` to `rust_toolchain`. (#1416)
7465c1aa29 Add test coverage support (#1324)
c5c3603da6 Bump the min supported bazel version (#1414)
937bdc9d05 Add a `cargo_dep_env` rule for setting build.rs environment variables (#1415)
91466fc0d1 Updated `rules_rust` version to `0.6.0`. (#1397)
97264b79d5 Update wasm_bindgen to use crate universe. (#1398)
d3197a65c5 Updated crate_universe version (to `0.3.0`) and dependencies (#1409)
a15e67d666 Deleted "extra workspace member" functionality from crate_universe (#1406)
5910a7585a Use a vec, not set for rustc_flags for crate_universe annotations (#1404)
3aa88ab067 Deleted deprecated `rust_analyzer` rule. (#1405)
7adf7210d0 cargo: Fix handling of relative sysroots (#1371)
57607239ec Enable rustfmt CI for Windows. (#1403)
30e68b49be Added more "ignore" tags to rustfmt and clippy rules. (#1400)
53ad14eead Added support for vendoring external manifests (#1381)
ff243c6ef0 Reorganized rustfmt source tree (#1399)
94e0044afe Refactored the Rustfmt tool to work cross-platform (#1375)
8fca438124 Ran clang-format on all C++ sources (#1396)
e765719e29 Added TemplateVariableInfo to rust_toolchain (#1377)
81590f4b6a Fixed Clippy bug with `--@rules_rust//:clippy_flags`. (#1392)
d77b9f7c6a Use  `target_compatible_with` to make `macos` with `Xcode` happy (#1391)
ec27dbe310 Added comments to internal function (#1378)
a9dd2f9200 Removed deprecated file (#1380)
16175c881c Renamed toolchain files targets (#1376)
c7cb5bd7a8 Support crates that have mix of generated and nongenerated inputs (#1340)
521e649ff4 Avoid using common substrings as encodings. (#1370)
28ac6b133d Use a more compact encoding in the `import` macro. (#1365)
3a099bfa97 Fix incorrect assertion in test_env_launcher test (#1368)
4661093fb1 Use target instead of rule in rust_register_toolchains edition docs (#1366)
652f2802e3 Add `env` attribute to `rust_toolchain`. (#1363)
9520f37f1e Update rules_perl in examples (#1364)
1b451c301e Add armv7-linux-androideabi tier 2 triple (#1362)
0265c293f1 Ensure crate_features to be included correctly in rust_project.json (#1356)
121d65fe6a Updated `rules_rust` version to `0.5.0` (#1360)
aca4ec1a0f crate_universe: fix typo (#1314)
69ca2611c5 Don't leak native dependencies of proc_macro (#1359)
4c7f08b8b9 Fixed missing docs (#1358)
e48bec94de feat: build script toolchains annotations (#1344)
ffb946f4b7 Ensure memchr is linked after libobject (#1349)
edca1d8042 Add developing notes for crate_universe (#1351)
120f911d2f Updated rust_bindgen dependencies API (#1354)
42c4528a5f Added Rust 1.61.0 (#1347)
c05e0c6ab1 Fixed fetch_shas script to correctly include .gz and .xz extensions (#1355)
9770b0dd75 Update apple_support (#1346)
87eb807e67 Added support for Rust 1.61.0 to crate_universe (#1348)
84c1d42128 Temporarily disable windows job in CI. (#1352)
421d30e4ff Remove unnecessary `crate_name` usage in `rust_test_suite`. (#1345)
10185339dd Build `rust_test` targets with `crate` using the same crate name as the underlying library target. (#1332)
0049ce3884 Add support for riscv32 targets (#1323)
3aa6de3c63 remove experimental_use_whole_archive_for_native_deps (#1338)
a066bfed46 Replace slashes with underscores in default crate names. (#1336)
1b91e592d5 Revert "Replace slashes with underscores in default crate names. (#1334)" (#1335)
51f8e302e9 "sandwich" rlibs between native deps in linker order (#1333)
df354904a1 Replace slashes with underscores in default crate names. (#1334)
21eed19188 Bump version to 0.4.0 (#1329)
d3d9abac4d Support . workspace member (#1326)
fccaae3055 Error calling `all_crate_deps` without `Cargo.toml` (#1327)
d7c532cb78 Updated wasm_bindgen dependencies API (#1313)
fb4d5546ea Updated wasm_bindgen rules to only require core `rules_nodejs` rules (#1311)
1590670ae1 Prevents running of clippy on bindgen targets (#1320)
73d0164a34 Add support for aarch64-apple-ios-sim (#1304)
61eee54c73 Add bazel-* directories in cargo_manifest_dir/external_crate to gitignore (#1279)
42f78f25e1 crate_universe: Improved documentation (#1305)
bddc4bd94a Silence warnings for example/test dependencies (#1312)
b04fe3b21f Use tinyjson from crates.io instead of github.com. (#1309)
1cab691d14 Remove doc about STATIC_RUST_URL env var. (#1306)
d86e06a884 Don't propagate non-shared transitive linker inputs from `rust_static|shared_library` (#1299)
5abeb93333 Don't emit `CrateInfo` from `rust_static_library` and `rust_shared_library` (#1298)
0175a1b7aa fix for using a nightly channel after https://github.com/bazelbuild/rules_rust/commit/841fc6fb82141576d91aecb1d3f2656d58b0ab71 (#1302)
e07881fa22 Updated crate_universe docs (#1301)
c63ad973f1 rustc: fix a conditional (#1300)
a6f332fcbe Use __EXEC_ROOT__ paths for genfiles in rust_analyzer aspect (#1293)
97de47df51 Remove 'triple' field from triple struct in favor of 'str' (#1297)
58627f59eb Make get_host_triple public to get a triple from Bazel's repository_ctx (#1289)
612f4362bc Updated `rules_rust` version to `0.3.1` (#1296)
26fa5a15de Fixed build issues in release artifact (#1295)
48bb32f817 crate_universe: Added tests for serialized config files. (#1291)
841fc6fb82 Enable xz archives (#1284)
f7cb22efa6 feat(#514): pass extra flags to clippy (#1264)
e9f8b48711 Updated `rules_rust` version to `0.3.0` (#1288)
c900e1c66c Revert "Add workaround for arm vs armv7 android issue (#1259)" (#1290)
01ebef2fb9 Remove DEFAULT_RUST_EDITION (#1256)
03a70796ab Outside of examples, fill in all `edition` attrs (#1257)
207ee4fbcf feat: support extra deps in rust_doc_test (#1286)
4e7d114a8e Fix typo in render config doc (#1281)
db17f291d3 Fix crate annotation anchor (#1282)
fdb6851a92 Fix target name in `rust_test` example. (#1280)
4fb6e40147 Don't leak additive build file content across crates (#1278)
965044ae2b Remove `rust_test` example which doesn't build. (#1267)
f6e7e0a93f add a stopgap experimental_use_whole_archive_for_native_deps attribute (#1269)
34fd46756a process_wrapper: add support for terminating rustc after it emits rmeta. (#1207)
b778fca0ac crate_universe: propagate build_script_tools (#1266)
f6f27a8734 Add workaround for arm vs armv7 android issue (#1259)
c3f56c2d50 Add the BUILD.bazel file to the wasm_bindgen distro filegroup target (#1246) (#1261)
1f2e6231de Set edition for process_wrapper and cargo_build_script_runner (#1254)
55790492ac Updated Rust to 1.60.0 (#1247)
b594f90f17 Workaround for issue in linux Cargo binaries (#1252)
8f0dd9042e rust_test_suite: ensure crate names are valid (#1248)
4144ddeb9c Updating `rules_rust` version to `0.2.1` (#1243)
65cad76a52 Fixed proto package in release artifact (#1241)
4d8de6e361 Updated repository pin in the docs (#1240)
e5a3970754 Updating `rules_rust` version to `0.2.0` (#1235)
d061bf640e Updated `crate_universe` version to `0.2.0` (#1239)
c0505da0d2 Replace `rust_repositories` with `rust_register_toolchains` in docs (#1237)
145ad7609f Fixed `crates_repository` deleting `.cargo/config.toml` files. (#1227)
20066b05e2 fix: distribute `//tools/rust_analyzer` (#1234)
b58ce89603 Enabled `rust_doc_test` for `crate_universe` (#1232)
d2e2470cbf Fix some unit tests to run from another workspace (#1226)
b03aee039a Fixed `crate_universe` clippy defects (#1228)
41b39f0c99 add bots using lld (and examples with clang as a drive by) (#1221)
84e98e4d2f don't emit --codegen={metadata,extra-filename} for rust_static_library and rust_shared_library (#1222)
e48c834a40 Renamed `crate_index` repository to `crate_universe_crate_index` (#1217)
99b4b2574f fix use of stamping in rust_binary_without_process_wrapper (#1218)
8df4517d37 Add NUM_JOBS env var to cargo build scripts (#1216)
628e85e70f Restrucutred `crate_universe` dependency macros (#1208)
e3d67a0a10 Updated docs to guide users to using releases (#1213)
fd912e644c Updated crate_universe docs. (#1212)
cde4c0826c Delete deprecated `rules` targets (#1210)
26e01c8386 cache the release archive in release actions (#1201)
3205c9d846 Updated crate_universe setup guide (#1202)
c078494678 Don't leak deps from rust_proc_macro (#1206)
7c865ffeb1 Build `_import_macro_dep` in `exec` mode (#1203)
635da93206 Updating `rules_rust` version to `0.1.0`. (#1198)
6c797c9070 disable advanced features of C++ rules (#1200)
86d47a1bba Tweak import macro bootstrap to trick rust analyzer aspect (#1179)
80d197205a Added release workflow (#1195)
cd44b3670a Added support for producing distribution archives (#1194)
a665447989 Traverse custom alias-like rules in the rust analyzer aspect (#1190)
4504983fa9 Add a test showing that rust_analayzer aspect traverses aliases (#1188)
297dd18215 Updated `crate_universe` to version `0.1.0`. (#1197)
0d9c7d5e1b Specify root target for rust_analyzer test (#1189)
4a0352fecd Updated `crate_universe` dependencies (#1196)
5126479254 Fixed crate_universe release tools (#1193)
e840400eb6 Remove last remains of use_process_wrapper flag. (#1192)
eb7db68d96 Fix iOS linker arguments (#1186)
de726a10c9 Create internal rust_binary rule instead of using transitions (#1187)
5e6ad9f638 Regenerated `cargo-raze` outputs with v0.15.0 (#1184)
980b662843 add static_library to get_preferred_artifact with pic (#1183)
97fd329540 Populate CFLAGS and CXXFLAGS when invoking build script. (#1081)

git-subtree-dir: third_party/rules_rust
git-subtree-split: 078c6908fc32c168b58e72cc3884dd8e30419e3a
Signed-off-by: Brian Silverman <bsilver16384@gmail.com>
Change-Id: Ifc218edaa852263bd76835ee7de44de07c08aec2
diff --git a/util/BUILD.bazel b/util/BUILD.bazel
index 217f1db..8502870 100644
--- a/util/BUILD.bazel
+++ b/util/BUILD.bazel
@@ -1,4 +1,11 @@
 sh_binary(
     name = "fetch_shas",
     srcs = ["fetch_shas.sh"],
+    tags = ["manual"],
+)
+
+filegroup(
+    name = "collect_coverage",
+    srcs = ["collect_coverage.sh"],
+    visibility = ["//visibility:public"],
 )
diff --git a/util/collect_coverage.sh b/util/collect_coverage.sh
new file mode 100755
index 0000000..328a5c6
--- /dev/null
+++ b/util/collect_coverage.sh
@@ -0,0 +1,25 @@
+#!/usr/bin/env bash
+
+set -euo pipefail
+
+if [[ -n "${VERBOSE_COVERAGE:-}" ]]; then
+  set -x
+fi
+
+readonly profdata_file=$COVERAGE_DIR/coverage.profdata
+
+"$RUNFILES_DIR/$TEST_WORKSPACE/$RUST_LLVM_PROFDATA" \
+  merge \
+  --sparse "$COVERAGE_DIR"/*.profraw \
+  -output "$profdata_file"
+
+"$RUNFILES_DIR/$TEST_WORKSPACE/$RUST_LLVM_COV" \
+  export \
+  -format=lcov \
+  -instr-profile "$profdata_file" \
+  -ignore-filename-regex='.*external/.+' \
+  -ignore-filename-regex='/tmp/.+' \
+  -path-equivalence=.,"$ROOT" \
+  "$RUNFILES_DIR/$TEST_WORKSPACE/$TEST_BINARY" \
+  @"$COVERAGE_MANIFEST" \
+  | sed 's#/proc/self/cwd/##' > "$COVERAGE_OUTPUT_FILE"
diff --git a/util/fetch_shas.sh b/util/fetch_shas.sh
index 2a538c1..50fe137 100755
--- a/util/fetch_shas.sh
+++ b/util/fetch_shas.sh
@@ -18,7 +18,12 @@
 BETA_ISO_DATES="$(cat "${BUILD_WORKSPACE_DIRECTORY}/util/fetch_shas_BETA_ISO_DATES.txt")"
 NIGHTLY_ISO_DATES="$(cat "${BUILD_WORKSPACE_DIRECTORY}/util/fetch_shas_NIGHTLY_ISO_DATES.txt")"
 
-enumerate_keys() {
+EXTENSIONS=(
+   tar.gz
+   tar.xz
+)
+
+function enumerate_keys() {
   for TOOL in $TOOLS
   do
     for TARGET in $TARGETS
@@ -49,12 +54,29 @@
   done
 }
 
-emit_bzl_file_contents() {
-  echo "$@" \
-    | parallel --trim lr -d ' ' --will-cite 'printf "%s %s\n", {}, $(curl --fail https://static.rust-lang.org/dist/{}.tar.gz.sha256 | cut -f1 -d" ")' \
-    | sed "s/,//g" \
-    | grep -v " $" \
-    > /tmp/reload_shas_shalist.txt
+function emit_bzl_file_contents() {
+  local out_dir="${TMPDIR}/outs"
+  mkdir "${out_dir}"
+
+  echo "--parallel" >> "${TMPDIR}/curl_config"
+  echo "--fail" >> "${TMPDIR}/curl_config"
+  echo "--silent" >> "${TMPDIR}/curl_config"
+  echo "--create-dirs" >> "${TMPDIR}/curl_config"
+  for key in "$@"; do
+    for ext in "${EXTENSIONS[@]}"; do
+      echo "--output ${out_dir}/${key}.${ext}" >> "${TMPDIR}/curl_config"
+      echo "--url https://static.rust-lang.org/dist/${key}.${ext}.sha256" >> "${TMPDIR}/curl_config"
+    done
+  done
+  curl --config "${TMPDIR}/curl_config"
+
+  pushd "${out_dir}" > /dev/null
+  for file in $(find . -type f)
+  do
+    echo "$(echo ${file} | sed 's|./||') $(cat ${file} | awk '{ print $1 }')" >> "${TMPDIR}/shas.txt"
+  done
+  
+  popd > /dev/null
 
   echo "\"\"\"A module containing a mapping of Rust tools to checksums"
   echo ""
@@ -62,9 +84,12 @@
   echo "\"\"\""
   echo ""
   echo "FILE_KEY_TO_SHA = {"
-  cat /tmp/reload_shas_shalist.txt | sed '/^[[:space:]]*$/d' | sort | awk '{print "    \"" $1 "\": \"" $2 "\","}'
+  cat "${TMPDIR}/shas.txt" | sed '/^[[:space:]]*$/d' | sort | awk '{print "    \"" $1 "\": \"" $2 "\","}'
   echo "}"
-  rm /tmp/reload_shas_shalist.txt
 }
 
+export TMPDIR="$(mktemp -d -t bazel_reload_shas_shalists)"
+echo "Fetching known shas..."
 echo "$(emit_bzl_file_contents $(enumerate_keys))" > "${BUILD_WORKSPACE_DIRECTORY}/rust/known_shas.bzl"
+echo "Done"
+rm -rf "${TMPDIR}"
diff --git a/util/fetch_shas_NIGHTLY_ISO_DATES.txt b/util/fetch_shas_NIGHTLY_ISO_DATES.txt
index 2d9a94e..ce46ada 100644
--- a/util/fetch_shas_NIGHTLY_ISO_DATES.txt
+++ b/util/fetch_shas_NIGHTLY_ISO_DATES.txt
@@ -12,3 +12,7 @@
 2022-01-12
 2022-01-19
 2022-02-23
+2022-04-06
+2022-05-19
+2022-06-30
+2022-07-18
diff --git a/util/fetch_shas_VERSIONS.txt b/util/fetch_shas_VERSIONS.txt
index 18ad30c..26ef26d 100644
--- a/util/fetch_shas_VERSIONS.txt
+++ b/util/fetch_shas_VERSIONS.txt
@@ -43,3 +43,7 @@
 1.58.0
 1.58.1
 1.59.0
+1.60.0
+1.61.0
+1.62.0
+1.62.1
diff --git a/util/import/3rdparty/BUILD.bazel b/util/import/3rdparty/BUILD.bazel
new file mode 100644
index 0000000..cb29b20
--- /dev/null
+++ b/util/import/3rdparty/BUILD.bazel
@@ -0,0 +1,40 @@
+load("@bazel_skylib//:bzl_library.bzl", "bzl_library")
+load("//crate_universe:defs.bzl", "crate", "crates_vendor")
+
+crates_vendor(
+    name = "crates_vendor",
+    cargo_lockfile = "Cargo.Bazel.lock",
+    generate_build_scripts = True,
+    mode = "remote",
+    packages = {
+        "aho-corasick": crate.spec(
+            version = "=0.7.15",
+        ),
+        "lazy_static": crate.spec(
+            version = "=1.4.0",
+        ),
+        "proc-macro2": crate.spec(
+            version = "=1.0.33",
+        ),
+        "quickcheck": crate.spec(
+            version = "=1.0.3",
+        ),
+        "quote": crate.spec(
+            version = "=1.0.10",
+        ),
+        "syn": crate.spec(
+            version = "=1.0.82",
+        ),
+    },
+    repository_name = "rules_rust_util_import",
+    tags = ["manual"],
+)
+
+bzl_library(
+    name = "bzl_lib",
+    srcs = glob(["**/*.bzl"]) + [
+        "//util/import/3rdparty/crates:defs.bzl",
+        "//util/import/3rdparty/crates:crates.bzl",
+    ],
+    visibility = ["//util/import:__pkg__"],
+)
diff --git a/util/import/raze/Cargo.raze.lock b/util/import/3rdparty/Cargo.Bazel.lock
similarity index 79%
rename from util/import/raze/Cargo.raze.lock
rename to util/import/3rdparty/Cargo.Bazel.lock
index 72b143b..102e136 100644
--- a/util/import/raze/Cargo.raze.lock
+++ b/util/import/3rdparty/Cargo.Bazel.lock
@@ -1,5 +1,7 @@
 # This file is automatically @generated by Cargo.
 # It is not intended for manual editing.
+version = 3
+
 [[package]]
 name = "aho-corasick"
 version = "0.7.15"
@@ -16,8 +18,8 @@
 checksum = "baf1de4339761588bc0619e3cbc0120ee582ebb74b53b4efbf79117bd2da40fd"
 
 [[package]]
-name = "compile_with_bazel"
-version = "0.0.0"
+name = "direct-cargo-bazel-deps"
+version = "0.0.1"
 dependencies = [
  "aho-corasick",
  "lazy_static",
@@ -39,9 +41,9 @@
 
 [[package]]
 name = "getrandom"
-version = "0.2.3"
+version = "0.2.7"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "7fcd999463524c52659517fe2cea98493cfe485d10565e7b0fb07dbba7ad2753"
+checksum = "4eb1a864a501629691edf6c15a593b7a51eebaa1e8468e9ddc623de7c9b58ec6"
 dependencies = [
  "cfg-if",
  "libc",
@@ -56,24 +58,24 @@
 
 [[package]]
 name = "libc"
-version = "0.2.112"
+version = "0.2.126"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "1b03d17f364a3a042d5e5d46b053bbbf82c92c9430c592dd4c064dc6ee997125"
+checksum = "349d5a591cd28b49e1d1037471617a32ddcda5731b99419008085f72d5a53836"
 
 [[package]]
 name = "log"
-version = "0.4.14"
+version = "0.4.17"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "51b9bbe6c47d51fc3e1a9b945965946b4c44142ab8792c50835a980d362c2710"
+checksum = "abb12e687cfb44aa40f41fc3978ef76448f9b6038cad6aef4259d3c095a2382e"
 dependencies = [
  "cfg-if",
 ]
 
 [[package]]
 name = "memchr"
-version = "2.4.1"
+version = "2.5.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "308cc39be01b73d0d18f82a0e7b2a3df85245f84af96fdddc5d202d27e47b86a"
+checksum = "2dffe52ecf27772e601905b7522cb4ef790d2cc203488bbd0e2fe85fcb74566d"
 
 [[package]]
 name = "proc-macro2"
@@ -106,9 +108,9 @@
 
 [[package]]
 name = "rand"
-version = "0.8.4"
+version = "0.8.5"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "2e7573632e6454cf6b99d7aac4ccca54be06da05aca2ef7423d22d27d4d4bcd8"
+checksum = "34af8d1a0e25924bc5b7c43c079c942339d8f0a8b57c39049bef581b46327404"
 dependencies = [
  "rand_core",
 ]
@@ -135,9 +137,9 @@
 
 [[package]]
 name = "regex-syntax"
-version = "0.6.25"
+version = "0.6.27"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "f497285884f3fcff424ffc933e56d7cbca511def0c9831a7f9b5f6153e3cc89b"
+checksum = "a3f87b73ce11b1619a3c6332f45341e0047173771e8b8b73f87bfeefb7b56244"
 
 [[package]]
 name = "syn"
@@ -152,12 +154,12 @@
 
 [[package]]
 name = "unicode-xid"
-version = "0.2.2"
+version = "0.2.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "8ccb82d61f80a663efe1f787a51b16b5a51e3314d6ac365b08639f52387b33f3"
+checksum = "957e51f3646910546462e67d5f7599b9e4fb8acdd304b087a6494730f9eebf04"
 
 [[package]]
 name = "wasi"
-version = "0.10.2+wasi-snapshot-preview1"
+version = "0.11.0+wasi-snapshot-preview1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "fd6fbd9a79829dd1ad0cc20627bf1ed606756a7f77edff7b66b7064f9cb327c6"
+checksum = "9c8d87e72b64a3b4db28d11ce29237c246188f4f51057d65a7eab63b7987e423"
diff --git a/util/import/3rdparty/crates/BUILD.aho-corasick-0.7.15.bazel b/util/import/3rdparty/crates/BUILD.aho-corasick-0.7.15.bazel
new file mode 100644
index 0000000..e502cde
--- /dev/null
+++ b/util/import/3rdparty/crates/BUILD.aho-corasick-0.7.15.bazel
@@ -0,0 +1,93 @@
+###############################################################################
+# @generated
+# DO NOT MODIFY: This file is auto-generated by a crate_universe tool. To
+# regenerate this file, run the following:
+#
+#     bazel run //util/import/3rdparty:crates_vendor
+###############################################################################
+
+load(
+    "@bazel_skylib//lib:selects.bzl",
+    "selects",
+)
+
+# buildifier: disable=bzl-visibility
+load("@rules_rust//crate_universe/private:selects.bzl", "select_with_or")
+load(
+    "@rules_rust//rust:defs.bzl",
+    "rust_library",
+)
+
+package(default_visibility = ["//visibility:public"])
+
+# licenses([
+#     "TODO",  # Unlicense/MIT
+# ])
+
+rust_library(
+    name = "aho_corasick",
+    srcs = glob(
+        include = [
+            "**/*.rs",
+        ],
+        exclude = [
+        ],
+    ),
+    aliases = selects.with_or({
+        "//conditions:default": {
+        },
+    }),
+    compile_data = glob(
+        include = ["**"],
+        exclude = [
+            "BUILD",
+            "BUILD.bazel",
+            "WORKSPACE",
+            "WORKSPACE.bazel",
+        ],
+    ) + select_with_or({
+        "//conditions:default": [
+        ],
+    }),
+    crate_features = [
+        "default",
+        "std",
+    ],
+    crate_root = "src/lib.rs",
+    data = select_with_or({
+        "//conditions:default": [
+        ],
+    }),
+    edition = "2015",
+    proc_macro_deps = [
+    ] + select_with_or({
+        "//conditions:default": [
+        ],
+    }),
+    rustc_env = {
+    },
+    rustc_env_files = select_with_or({
+        "//conditions:default": [
+        ],
+    }),
+    rustc_flags = [
+        # In most cases, warnings in 3rd party crates are not interesting as
+        # they're out of the control of consumers. The flag here silences
+        # warnings. For more details see:
+        # https://doc.rust-lang.org/rustc/lints/levels.html
+        "--cap-lints=allow",
+    ],
+    tags = [
+        "cargo-bazel",
+        "manual",
+        "noclippy",
+        "norustfmt",
+    ],
+    version = "0.7.15",
+    deps = [
+    ] + select_with_or({
+        "//conditions:default": [
+            "@rules_rust_util_import__memchr-2.5.0//:memchr",
+        ],
+    }),
+)
diff --git a/util/import/3rdparty/crates/BUILD.bazel b/util/import/3rdparty/crates/BUILD.bazel
new file mode 100644
index 0000000..4674880
--- /dev/null
+++ b/util/import/3rdparty/crates/BUILD.bazel
@@ -0,0 +1,66 @@
+###############################################################################
+# @generated
+# DO NOT MODIFY: This file is auto-generated by a crate_universe tool. To
+# regenerate this file, run the following:
+#
+#     bazel run //util/import/3rdparty:crates_vendor
+###############################################################################
+
+package(default_visibility = ["//visibility:public"])
+
+exports_files(
+    [
+        "cargo-bazel.json",
+        "defs.bzl",
+        "crates.bzl",
+    ] + glob([
+        "*.bazel",
+    ]),
+)
+
+filegroup(
+    name = "srcs",
+    srcs = glob([
+        "*.bazel",
+        "*.bzl",
+    ]),
+)
+
+# Workspace Member Dependencies
+alias(
+    name = "aho-corasick",
+    actual = "@rules_rust_util_import__aho-corasick-0.7.15//:aho_corasick",
+    tags = ["manual"],
+)
+
+alias(
+    name = "lazy_static",
+    actual = "@rules_rust_util_import__lazy_static-1.4.0//:lazy_static",
+    tags = ["manual"],
+)
+
+alias(
+    name = "proc-macro2",
+    actual = "@rules_rust_util_import__proc-macro2-1.0.33//:proc_macro2",
+    tags = ["manual"],
+)
+
+alias(
+    name = "quickcheck",
+    actual = "@rules_rust_util_import__quickcheck-1.0.3//:quickcheck",
+    tags = ["manual"],
+)
+
+alias(
+    name = "quote",
+    actual = "@rules_rust_util_import__quote-1.0.10//:quote",
+    tags = ["manual"],
+)
+
+alias(
+    name = "syn",
+    actual = "@rules_rust_util_import__syn-1.0.82//:syn",
+    tags = ["manual"],
+)
+
+# Binaries
diff --git a/util/import/3rdparty/crates/BUILD.cfg-if-1.0.0.bazel b/util/import/3rdparty/crates/BUILD.cfg-if-1.0.0.bazel
new file mode 100644
index 0000000..33352ad
--- /dev/null
+++ b/util/import/3rdparty/crates/BUILD.cfg-if-1.0.0.bazel
@@ -0,0 +1,90 @@
+###############################################################################
+# @generated
+# DO NOT MODIFY: This file is auto-generated by a crate_universe tool. To
+# regenerate this file, run the following:
+#
+#     bazel run //util/import/3rdparty:crates_vendor
+###############################################################################
+
+load(
+    "@bazel_skylib//lib:selects.bzl",
+    "selects",
+)
+
+# buildifier: disable=bzl-visibility
+load("@rules_rust//crate_universe/private:selects.bzl", "select_with_or")
+load(
+    "@rules_rust//rust:defs.bzl",
+    "rust_library",
+)
+
+package(default_visibility = ["//visibility:public"])
+
+# licenses([
+#     "TODO",  # MIT/Apache-2.0
+# ])
+
+rust_library(
+    name = "cfg_if",
+    srcs = glob(
+        include = [
+            "**/*.rs",
+        ],
+        exclude = [
+        ],
+    ),
+    aliases = selects.with_or({
+        "//conditions:default": {
+        },
+    }),
+    compile_data = glob(
+        include = ["**"],
+        exclude = [
+            "BUILD",
+            "BUILD.bazel",
+            "WORKSPACE",
+            "WORKSPACE.bazel",
+        ],
+    ) + select_with_or({
+        "//conditions:default": [
+        ],
+    }),
+    crate_features = [
+    ],
+    crate_root = "src/lib.rs",
+    data = select_with_or({
+        "//conditions:default": [
+        ],
+    }),
+    edition = "2018",
+    proc_macro_deps = [
+    ] + select_with_or({
+        "//conditions:default": [
+        ],
+    }),
+    rustc_env = {
+    },
+    rustc_env_files = select_with_or({
+        "//conditions:default": [
+        ],
+    }),
+    rustc_flags = [
+        # In most cases, warnings in 3rd party crates are not interesting as
+        # they're out of the control of consumers. The flag here silences
+        # warnings. For more details see:
+        # https://doc.rust-lang.org/rustc/lints/levels.html
+        "--cap-lints=allow",
+    ],
+    tags = [
+        "cargo-bazel",
+        "manual",
+        "noclippy",
+        "norustfmt",
+    ],
+    version = "1.0.0",
+    deps = [
+    ] + select_with_or({
+        "//conditions:default": [
+        ],
+    }),
+)
diff --git a/util/import/3rdparty/crates/BUILD.env_logger-0.8.4.bazel b/util/import/3rdparty/crates/BUILD.env_logger-0.8.4.bazel
new file mode 100644
index 0000000..4bab83f
--- /dev/null
+++ b/util/import/3rdparty/crates/BUILD.env_logger-0.8.4.bazel
@@ -0,0 +1,93 @@
+###############################################################################
+# @generated
+# DO NOT MODIFY: This file is auto-generated by a crate_universe tool. To
+# regenerate this file, run the following:
+#
+#     bazel run //util/import/3rdparty:crates_vendor
+###############################################################################
+
+load(
+    "@bazel_skylib//lib:selects.bzl",
+    "selects",
+)
+
+# buildifier: disable=bzl-visibility
+load("@rules_rust//crate_universe/private:selects.bzl", "select_with_or")
+load(
+    "@rules_rust//rust:defs.bzl",
+    "rust_library",
+)
+
+package(default_visibility = ["//visibility:public"])
+
+# licenses([
+#     "TODO",  # MIT/Apache-2.0
+# ])
+
+rust_library(
+    name = "env_logger",
+    srcs = glob(
+        include = [
+            "**/*.rs",
+        ],
+        exclude = [
+        ],
+    ),
+    aliases = selects.with_or({
+        "//conditions:default": {
+        },
+    }),
+    compile_data = glob(
+        include = ["**"],
+        exclude = [
+            "BUILD",
+            "BUILD.bazel",
+            "WORKSPACE",
+            "WORKSPACE.bazel",
+        ],
+    ) + select_with_or({
+        "//conditions:default": [
+        ],
+    }),
+    crate_features = [
+        "regex",
+    ],
+    crate_root = "src/lib.rs",
+    data = select_with_or({
+        "//conditions:default": [
+        ],
+    }),
+    edition = "2018",
+    proc_macro_deps = [
+    ] + select_with_or({
+        "//conditions:default": [
+        ],
+    }),
+    rustc_env = {
+    },
+    rustc_env_files = select_with_or({
+        "//conditions:default": [
+        ],
+    }),
+    rustc_flags = [
+        # In most cases, warnings in 3rd party crates are not interesting as
+        # they're out of the control of consumers. The flag here silences
+        # warnings. For more details see:
+        # https://doc.rust-lang.org/rustc/lints/levels.html
+        "--cap-lints=allow",
+    ],
+    tags = [
+        "cargo-bazel",
+        "manual",
+        "noclippy",
+        "norustfmt",
+    ],
+    version = "0.8.4",
+    deps = [
+    ] + select_with_or({
+        "//conditions:default": [
+            "@rules_rust_util_import__log-0.4.17//:log",
+            "@rules_rust_util_import__regex-1.4.6//:regex",
+        ],
+    }),
+)
diff --git a/util/import/3rdparty/crates/BUILD.getrandom-0.2.7.bazel b/util/import/3rdparty/crates/BUILD.getrandom-0.2.7.bazel
new file mode 100644
index 0000000..533dc8c
--- /dev/null
+++ b/util/import/3rdparty/crates/BUILD.getrandom-0.2.7.bazel
@@ -0,0 +1,129 @@
+###############################################################################
+# @generated
+# DO NOT MODIFY: This file is auto-generated by a crate_universe tool. To
+# regenerate this file, run the following:
+#
+#     bazel run //util/import/3rdparty:crates_vendor
+###############################################################################
+
+load(
+    "@bazel_skylib//lib:selects.bzl",
+    "selects",
+)
+
+# buildifier: disable=bzl-visibility
+load("@rules_rust//crate_universe/private:selects.bzl", "select_with_or")
+load(
+    "@rules_rust//rust:defs.bzl",
+    "rust_library",
+)
+
+package(default_visibility = ["//visibility:public"])
+
+# licenses([
+#     "TODO",  # MIT OR Apache-2.0
+# ])
+
+rust_library(
+    name = "getrandom",
+    srcs = glob(
+        include = [
+            "**/*.rs",
+        ],
+        exclude = [
+        ],
+    ),
+    aliases = selects.with_or({
+        "//conditions:default": {
+        },
+    }),
+    compile_data = glob(
+        include = ["**"],
+        exclude = [
+            "BUILD",
+            "BUILD.bazel",
+            "WORKSPACE",
+            "WORKSPACE.bazel",
+        ],
+    ) + select_with_or({
+        "//conditions:default": [
+        ],
+    }),
+    crate_features = [
+    ],
+    crate_root = "src/lib.rs",
+    data = select_with_or({
+        "//conditions:default": [
+        ],
+    }),
+    edition = "2018",
+    proc_macro_deps = [
+    ] + select_with_or({
+        "//conditions:default": [
+        ],
+    }),
+    rustc_env = {
+    },
+    rustc_env_files = select_with_or({
+        "//conditions:default": [
+        ],
+    }),
+    rustc_flags = [
+        # In most cases, warnings in 3rd party crates are not interesting as
+        # they're out of the control of consumers. The flag here silences
+        # warnings. For more details see:
+        # https://doc.rust-lang.org/rustc/lints/levels.html
+        "--cap-lints=allow",
+    ],
+    tags = [
+        "cargo-bazel",
+        "manual",
+        "noclippy",
+        "norustfmt",
+    ],
+    version = "0.2.7",
+    deps = [
+    ] + select_with_or({
+        # cfg(target_os = "wasi")
+        (
+            "@rules_rust//rust/platform:wasm32-wasi",
+        ): [
+            # Target Deps
+            "@rules_rust_util_import__wasi-0.11.0-wasi-snapshot-preview1//:wasi",
+
+            # Common Deps
+            "@rules_rust_util_import__cfg-if-1.0.0//:cfg_if",
+        ],
+        # cfg(unix)
+        (
+            "@rules_rust//rust/platform:aarch64-apple-darwin",
+            "@rules_rust//rust/platform:aarch64-apple-ios",
+            "@rules_rust//rust/platform:aarch64-apple-ios-sim",
+            "@rules_rust//rust/platform:aarch64-linux-android",
+            "@rules_rust//rust/platform:aarch64-unknown-linux-gnu",
+            "@rules_rust//rust/platform:arm-unknown-linux-gnueabi",
+            "@rules_rust//rust/platform:armv7-linux-androideabi",
+            "@rules_rust//rust/platform:armv7-unknown-linux-gnueabi",
+            "@rules_rust//rust/platform:i686-apple-darwin",
+            "@rules_rust//rust/platform:i686-linux-android",
+            "@rules_rust//rust/platform:i686-unknown-freebsd",
+            "@rules_rust//rust/platform:i686-unknown-linux-gnu",
+            "@rules_rust//rust/platform:powerpc-unknown-linux-gnu",
+            "@rules_rust//rust/platform:s390x-unknown-linux-gnu",
+            "@rules_rust//rust/platform:x86_64-apple-darwin",
+            "@rules_rust//rust/platform:x86_64-apple-ios",
+            "@rules_rust//rust/platform:x86_64-linux-android",
+            "@rules_rust//rust/platform:x86_64-unknown-freebsd",
+            "@rules_rust//rust/platform:x86_64-unknown-linux-gnu",
+        ): [
+            # Target Deps
+            "@rules_rust_util_import__libc-0.2.126//:libc",
+
+            # Common Deps
+            "@rules_rust_util_import__cfg-if-1.0.0//:cfg_if",
+        ],
+        "//conditions:default": [
+            "@rules_rust_util_import__cfg-if-1.0.0//:cfg_if",
+        ],
+    }),
+)
diff --git a/util/import/3rdparty/crates/BUILD.lazy_static-1.4.0.bazel b/util/import/3rdparty/crates/BUILD.lazy_static-1.4.0.bazel
new file mode 100644
index 0000000..9c7761e
--- /dev/null
+++ b/util/import/3rdparty/crates/BUILD.lazy_static-1.4.0.bazel
@@ -0,0 +1,90 @@
+###############################################################################
+# @generated
+# DO NOT MODIFY: This file is auto-generated by a crate_universe tool. To
+# regenerate this file, run the following:
+#
+#     bazel run //util/import/3rdparty:crates_vendor
+###############################################################################
+
+load(
+    "@bazel_skylib//lib:selects.bzl",
+    "selects",
+)
+
+# buildifier: disable=bzl-visibility
+load("@rules_rust//crate_universe/private:selects.bzl", "select_with_or")
+load(
+    "@rules_rust//rust:defs.bzl",
+    "rust_library",
+)
+
+package(default_visibility = ["//visibility:public"])
+
+# licenses([
+#     "TODO",  # MIT/Apache-2.0
+# ])
+
+rust_library(
+    name = "lazy_static",
+    srcs = glob(
+        include = [
+            "**/*.rs",
+        ],
+        exclude = [
+        ],
+    ),
+    aliases = selects.with_or({
+        "//conditions:default": {
+        },
+    }),
+    compile_data = glob(
+        include = ["**"],
+        exclude = [
+            "BUILD",
+            "BUILD.bazel",
+            "WORKSPACE",
+            "WORKSPACE.bazel",
+        ],
+    ) + select_with_or({
+        "//conditions:default": [
+        ],
+    }),
+    crate_features = [
+    ],
+    crate_root = "src/lib.rs",
+    data = select_with_or({
+        "//conditions:default": [
+        ],
+    }),
+    edition = "2015",
+    proc_macro_deps = [
+    ] + select_with_or({
+        "//conditions:default": [
+        ],
+    }),
+    rustc_env = {
+    },
+    rustc_env_files = select_with_or({
+        "//conditions:default": [
+        ],
+    }),
+    rustc_flags = [
+        # In most cases, warnings in 3rd party crates are not interesting as
+        # they're out of the control of consumers. The flag here silences
+        # warnings. For more details see:
+        # https://doc.rust-lang.org/rustc/lints/levels.html
+        "--cap-lints=allow",
+    ],
+    tags = [
+        "cargo-bazel",
+        "manual",
+        "noclippy",
+        "norustfmt",
+    ],
+    version = "1.4.0",
+    deps = [
+    ] + select_with_or({
+        "//conditions:default": [
+        ],
+    }),
+)
diff --git a/util/import/3rdparty/crates/BUILD.libc-0.2.126.bazel b/util/import/3rdparty/crates/BUILD.libc-0.2.126.bazel
new file mode 100644
index 0000000..723908e
--- /dev/null
+++ b/util/import/3rdparty/crates/BUILD.libc-0.2.126.bazel
@@ -0,0 +1,174 @@
+###############################################################################
+# @generated
+# DO NOT MODIFY: This file is auto-generated by a crate_universe tool. To
+# regenerate this file, run the following:
+#
+#     bazel run //util/import/3rdparty:crates_vendor
+###############################################################################
+
+load(
+    "@bazel_skylib//lib:selects.bzl",
+    "selects",
+)
+load(
+    "@rules_rust//cargo:defs.bzl",
+    "cargo_build_script",
+)
+
+# buildifier: disable=bzl-visibility
+load("@rules_rust//crate_universe/private:selects.bzl", "select_with_or")
+load(
+    "@rules_rust//rust:defs.bzl",
+    "rust_library",
+)
+
+package(default_visibility = ["//visibility:public"])
+
+# licenses([
+#     "TODO",  # MIT OR Apache-2.0
+# ])
+
+rust_library(
+    name = "libc",
+    srcs = glob(
+        include = [
+            "**/*.rs",
+        ],
+        exclude = [
+        ],
+    ),
+    aliases = selects.with_or({
+        "//conditions:default": {
+        },
+    }),
+    compile_data = glob(
+        include = ["**"],
+        exclude = [
+            "BUILD",
+            "BUILD.bazel",
+            "WORKSPACE",
+            "WORKSPACE.bazel",
+        ],
+    ) + select_with_or({
+        "//conditions:default": [
+        ],
+    }),
+    crate_features = [
+    ],
+    crate_root = "src/lib.rs",
+    data = select_with_or({
+        "//conditions:default": [
+        ],
+    }),
+    edition = "2015",
+    proc_macro_deps = [
+    ] + select_with_or({
+        "//conditions:default": [
+        ],
+    }),
+    rustc_env = {
+    },
+    rustc_env_files = select_with_or({
+        "//conditions:default": [
+        ],
+    }),
+    rustc_flags = [
+        # In most cases, warnings in 3rd party crates are not interesting as
+        # they're out of the control of consumers. The flag here silences
+        # warnings. For more details see:
+        # https://doc.rust-lang.org/rustc/lints/levels.html
+        "--cap-lints=allow",
+    ],
+    tags = [
+        "cargo-bazel",
+        "manual",
+        "noclippy",
+        "norustfmt",
+    ],
+    version = "0.2.126",
+    deps = [
+    ] + select_with_or({
+        "//conditions:default": [
+            "@rules_rust_util_import__libc-0.2.126//:build_script_build",
+        ],
+    }),
+)
+
+cargo_build_script(
+    # See comment associated with alias. Do not change this name
+    name = "libc_build_script",
+    srcs = glob(
+        include = [
+            "**/*.rs",
+        ],
+        exclude = [
+        ],
+    ),
+    aliases = selects.with_or({
+        "//conditions:default": {
+        },
+    }),
+    build_script_env = {
+    },
+    compile_data = select_with_or({
+        "//conditions:default": [
+        ],
+    }),
+    crate_features = [
+    ],
+    crate_name = "build_script_build",
+    crate_root = "build.rs",
+    data = glob(["**"]) + select_with_or({
+        "//conditions:default": [
+        ],
+    }),
+    edition = "2015",
+    proc_macro_deps = [
+    ] + select_with_or({
+        "//conditions:default": [
+        ],
+    }),
+    rustc_env = {
+    },
+    rustc_env_files = select_with_or({
+        "//conditions:default": [
+        ],
+    }),
+    rustc_flags = [
+        # In most cases, warnings in 3rd party crates are not interesting as
+        # they're out of the control of consumers. The flag here silences
+        # warnings. For more details see:
+        # https://doc.rust-lang.org/rustc/lints/levels.html
+        "--cap-lints=allow",
+    ],
+    tags = [
+        "cargo-bazel",
+        "manual",
+        "noclippy",
+        "norustfmt",
+    ],
+    tools = select_with_or({
+        "//conditions:default": [
+        ],
+    }),
+    version = "0.2.126",
+    visibility = ["//visibility:private"],
+    deps = [
+    ] + select_with_or({
+        "//conditions:default": [
+        ],
+    }),
+)
+
+alias(
+    # Because `cargo_build_script` does some invisible target name mutating to
+    # determine the package and crate name for a build script, the Bazel
+    # target namename of any build script cannot be the Cargo canonical name
+    # of `build_script_build` without losing out on having certain Cargo
+    # environment variables set.
+    name = "build_script_build",
+    actual = "libc_build_script",
+    tags = [
+        "manual",
+    ],
+)
diff --git a/util/import/3rdparty/crates/BUILD.log-0.4.17.bazel b/util/import/3rdparty/crates/BUILD.log-0.4.17.bazel
new file mode 100644
index 0000000..a9f2f72
--- /dev/null
+++ b/util/import/3rdparty/crates/BUILD.log-0.4.17.bazel
@@ -0,0 +1,177 @@
+###############################################################################
+# @generated
+# DO NOT MODIFY: This file is auto-generated by a crate_universe tool. To
+# regenerate this file, run the following:
+#
+#     bazel run //util/import/3rdparty:crates_vendor
+###############################################################################
+
+load(
+    "@bazel_skylib//lib:selects.bzl",
+    "selects",
+)
+load(
+    "@rules_rust//cargo:defs.bzl",
+    "cargo_build_script",
+)
+
+# buildifier: disable=bzl-visibility
+load("@rules_rust//crate_universe/private:selects.bzl", "select_with_or")
+load(
+    "@rules_rust//rust:defs.bzl",
+    "rust_library",
+)
+
+package(default_visibility = ["//visibility:public"])
+
+# licenses([
+#     "TODO",  # MIT OR Apache-2.0
+# ])
+
+rust_library(
+    name = "log",
+    srcs = glob(
+        include = [
+            "**/*.rs",
+        ],
+        exclude = [
+        ],
+    ),
+    aliases = selects.with_or({
+        "//conditions:default": {
+        },
+    }),
+    compile_data = glob(
+        include = ["**"],
+        exclude = [
+            "BUILD",
+            "BUILD.bazel",
+            "WORKSPACE",
+            "WORKSPACE.bazel",
+        ],
+    ) + select_with_or({
+        "//conditions:default": [
+        ],
+    }),
+    crate_features = [
+        "std",
+    ],
+    crate_root = "src/lib.rs",
+    data = select_with_or({
+        "//conditions:default": [
+        ],
+    }),
+    edition = "2015",
+    proc_macro_deps = [
+    ] + select_with_or({
+        "//conditions:default": [
+        ],
+    }),
+    rustc_env = {
+    },
+    rustc_env_files = select_with_or({
+        "//conditions:default": [
+        ],
+    }),
+    rustc_flags = [
+        # In most cases, warnings in 3rd party crates are not interesting as
+        # they're out of the control of consumers. The flag here silences
+        # warnings. For more details see:
+        # https://doc.rust-lang.org/rustc/lints/levels.html
+        "--cap-lints=allow",
+    ],
+    tags = [
+        "cargo-bazel",
+        "manual",
+        "noclippy",
+        "norustfmt",
+    ],
+    version = "0.4.17",
+    deps = [
+    ] + select_with_or({
+        "//conditions:default": [
+            "@rules_rust_util_import__cfg-if-1.0.0//:cfg_if",
+            "@rules_rust_util_import__log-0.4.17//:build_script_build",
+        ],
+    }),
+)
+
+cargo_build_script(
+    # See comment associated with alias. Do not change this name
+    name = "log_build_script",
+    srcs = glob(
+        include = [
+            "**/*.rs",
+        ],
+        exclude = [
+        ],
+    ),
+    aliases = selects.with_or({
+        "//conditions:default": {
+        },
+    }),
+    build_script_env = {
+    },
+    compile_data = select_with_or({
+        "//conditions:default": [
+        ],
+    }),
+    crate_features = [
+        "std",
+    ],
+    crate_name = "build_script_build",
+    crate_root = "build.rs",
+    data = glob(["**"]) + select_with_or({
+        "//conditions:default": [
+        ],
+    }),
+    edition = "2015",
+    proc_macro_deps = [
+    ] + select_with_or({
+        "//conditions:default": [
+        ],
+    }),
+    rustc_env = {
+    },
+    rustc_env_files = select_with_or({
+        "//conditions:default": [
+        ],
+    }),
+    rustc_flags = [
+        # In most cases, warnings in 3rd party crates are not interesting as
+        # they're out of the control of consumers. The flag here silences
+        # warnings. For more details see:
+        # https://doc.rust-lang.org/rustc/lints/levels.html
+        "--cap-lints=allow",
+    ],
+    tags = [
+        "cargo-bazel",
+        "manual",
+        "noclippy",
+        "norustfmt",
+    ],
+    tools = select_with_or({
+        "//conditions:default": [
+        ],
+    }),
+    version = "0.4.17",
+    visibility = ["//visibility:private"],
+    deps = [
+    ] + select_with_or({
+        "//conditions:default": [
+        ],
+    }),
+)
+
+alias(
+    # Because `cargo_build_script` does some invisible target name mutating to
+    # determine the package and crate name for a build script, the Bazel
+    # target namename of any build script cannot be the Cargo canonical name
+    # of `build_script_build` without losing out on having certain Cargo
+    # environment variables set.
+    name = "build_script_build",
+    actual = "log_build_script",
+    tags = [
+        "manual",
+    ],
+)
diff --git a/util/import/3rdparty/crates/BUILD.memchr-2.5.0.bazel b/util/import/3rdparty/crates/BUILD.memchr-2.5.0.bazel
new file mode 100644
index 0000000..4880289
--- /dev/null
+++ b/util/import/3rdparty/crates/BUILD.memchr-2.5.0.bazel
@@ -0,0 +1,180 @@
+###############################################################################
+# @generated
+# DO NOT MODIFY: This file is auto-generated by a crate_universe tool. To
+# regenerate this file, run the following:
+#
+#     bazel run //util/import/3rdparty:crates_vendor
+###############################################################################
+
+load(
+    "@bazel_skylib//lib:selects.bzl",
+    "selects",
+)
+load(
+    "@rules_rust//cargo:defs.bzl",
+    "cargo_build_script",
+)
+
+# buildifier: disable=bzl-visibility
+load("@rules_rust//crate_universe/private:selects.bzl", "select_with_or")
+load(
+    "@rules_rust//rust:defs.bzl",
+    "rust_library",
+)
+
+package(default_visibility = ["//visibility:public"])
+
+# licenses([
+#     "TODO",  # Unlicense/MIT
+# ])
+
+rust_library(
+    name = "memchr",
+    srcs = glob(
+        include = [
+            "**/*.rs",
+        ],
+        exclude = [
+        ],
+    ),
+    aliases = selects.with_or({
+        "//conditions:default": {
+        },
+    }),
+    compile_data = glob(
+        include = ["**"],
+        exclude = [
+            "BUILD",
+            "BUILD.bazel",
+            "WORKSPACE",
+            "WORKSPACE.bazel",
+        ],
+    ) + select_with_or({
+        "//conditions:default": [
+        ],
+    }),
+    crate_features = [
+        "default",
+        "std",
+        "use_std",
+    ],
+    crate_root = "src/lib.rs",
+    data = select_with_or({
+        "//conditions:default": [
+        ],
+    }),
+    edition = "2018",
+    proc_macro_deps = [
+    ] + select_with_or({
+        "//conditions:default": [
+        ],
+    }),
+    rustc_env = {
+    },
+    rustc_env_files = select_with_or({
+        "//conditions:default": [
+        ],
+    }),
+    rustc_flags = [
+        # In most cases, warnings in 3rd party crates are not interesting as
+        # they're out of the control of consumers. The flag here silences
+        # warnings. For more details see:
+        # https://doc.rust-lang.org/rustc/lints/levels.html
+        "--cap-lints=allow",
+    ],
+    tags = [
+        "cargo-bazel",
+        "manual",
+        "noclippy",
+        "norustfmt",
+    ],
+    version = "2.5.0",
+    deps = [
+    ] + select_with_or({
+        "//conditions:default": [
+            "@rules_rust_util_import__memchr-2.5.0//:build_script_build",
+        ],
+    }),
+)
+
+cargo_build_script(
+    # See comment associated with alias. Do not change this name
+    name = "memchr_build_script",
+    srcs = glob(
+        include = [
+            "**/*.rs",
+        ],
+        exclude = [
+        ],
+    ),
+    aliases = selects.with_or({
+        "//conditions:default": {
+        },
+    }),
+    build_script_env = {
+    },
+    compile_data = select_with_or({
+        "//conditions:default": [
+        ],
+    }),
+    crate_features = [
+        "default",
+        "std",
+        "use_std",
+    ],
+    crate_name = "build_script_build",
+    crate_root = "build.rs",
+    data = glob(["**"]) + select_with_or({
+        "//conditions:default": [
+        ],
+    }),
+    edition = "2018",
+    proc_macro_deps = [
+    ] + select_with_or({
+        "//conditions:default": [
+        ],
+    }),
+    rustc_env = {
+    },
+    rustc_env_files = select_with_or({
+        "//conditions:default": [
+        ],
+    }),
+    rustc_flags = [
+        # In most cases, warnings in 3rd party crates are not interesting as
+        # they're out of the control of consumers. The flag here silences
+        # warnings. For more details see:
+        # https://doc.rust-lang.org/rustc/lints/levels.html
+        "--cap-lints=allow",
+    ],
+    tags = [
+        "cargo-bazel",
+        "manual",
+        "noclippy",
+        "norustfmt",
+    ],
+    tools = select_with_or({
+        "//conditions:default": [
+        ],
+    }),
+    version = "2.5.0",
+    visibility = ["//visibility:private"],
+    deps = [
+    ] + select_with_or({
+        "//conditions:default": [
+        ],
+    }),
+)
+
+alias(
+    # Because `cargo_build_script` does some invisible target name mutating to
+    # determine the package and crate name for a build script, the Bazel
+    # target namename of any build script cannot be the Cargo canonical name
+    # of `build_script_build` without losing out on having certain Cargo
+    # environment variables set.
+    name = "build_script_build",
+    actual = "memchr_build_script",
+    tags = [
+        "manual",
+    ],
+)
diff --git a/util/import/3rdparty/crates/BUILD.proc-macro2-1.0.33.bazel b/util/import/3rdparty/crates/BUILD.proc-macro2-1.0.33.bazel
new file mode 100644
index 0000000..85ab9a4
--- /dev/null
+++ b/util/import/3rdparty/crates/BUILD.proc-macro2-1.0.33.bazel
@@ -0,0 +1,179 @@
+###############################################################################
+# @generated
+# DO NOT MODIFY: This file is auto-generated by a crate_universe tool. To
+# regenerate this file, run the following:
+#
+#     bazel run //util/import/3rdparty:crates_vendor
+###############################################################################
+
+load(
+    "@bazel_skylib//lib:selects.bzl",
+    "selects",
+)
+load(
+    "@rules_rust//cargo:defs.bzl",
+    "cargo_build_script",
+)
+
+# buildifier: disable=bzl-visibility
+load("@rules_rust//crate_universe/private:selects.bzl", "select_with_or")
+load(
+    "@rules_rust//rust:defs.bzl",
+    "rust_library",
+)
+
+package(default_visibility = ["//visibility:public"])
+
+# licenses([
+#     "TODO",  # MIT OR Apache-2.0
+# ])
+
+rust_library(
+    name = "proc_macro2",
+    srcs = glob(
+        include = [
+            "**/*.rs",
+        ],
+        exclude = [
+        ],
+    ),
+    aliases = selects.with_or({
+        "//conditions:default": {
+        },
+    }),
+    compile_data = glob(
+        include = ["**"],
+        exclude = [
+            "BUILD",
+            "BUILD.bazel",
+            "WORKSPACE",
+            "WORKSPACE.bazel",
+        ],
+    ) + select_with_or({
+        "//conditions:default": [
+        ],
+    }),
+    crate_features = [
+        "default",
+        "proc-macro",
+    ],
+    crate_root = "src/lib.rs",
+    data = select_with_or({
+        "//conditions:default": [
+        ],
+    }),
+    edition = "2018",
+    proc_macro_deps = [
+    ] + select_with_or({
+        "//conditions:default": [
+        ],
+    }),
+    rustc_env = {
+    },
+    rustc_env_files = select_with_or({
+        "//conditions:default": [
+        ],
+    }),
+    rustc_flags = [
+        # In most cases, warnings in 3rd party crates are not interesting as
+        # they're out of the control of consumers. The flag here silences
+        # warnings. For more details see:
+        # https://doc.rust-lang.org/rustc/lints/levels.html
+        "--cap-lints=allow",
+    ],
+    tags = [
+        "cargo-bazel",
+        "manual",
+        "noclippy",
+        "norustfmt",
+    ],
+    version = "1.0.33",
+    deps = [
+    ] + select_with_or({
+        "//conditions:default": [
+            "@rules_rust_util_import__proc-macro2-1.0.33//:build_script_build",
+            "@rules_rust_util_import__unicode-xid-0.2.3//:unicode_xid",
+        ],
+    }),
+)
+
+cargo_build_script(
+    # See comment associated with alias. Do not change this name
+    name = "proc-macro2_build_script",
+    srcs = glob(
+        include = [
+            "**/*.rs",
+        ],
+        exclude = [
+        ],
+    ),
+    aliases = selects.with_or({
+        "//conditions:default": {
+        },
+    }),
+    build_script_env = {
+    },
+    compile_data = select_with_or({
+        "//conditions:default": [
+        ],
+    }),
+    crate_features = [
+        "default",
+        "proc-macro",
+    ],
+    crate_name = "build_script_build",
+    crate_root = "build.rs",
+    data = glob(["**"]) + select_with_or({
+        "//conditions:default": [
+        ],
+    }),
+    edition = "2018",
+    proc_macro_deps = [
+    ] + select_with_or({
+        "//conditions:default": [
+        ],
+    }),
+    rustc_env = {
+    },
+    rustc_env_files = select_with_or({
+        "//conditions:default": [
+        ],
+    }),
+    rustc_flags = [
+        # In most cases, warnings in 3rd party crates are not interesting as
+        # they're out of the control of consumers. The flag here silences
+        # warnings. For more details see:
+        # https://doc.rust-lang.org/rustc/lints/levels.html
+        "--cap-lints=allow",
+    ],
+    tags = [
+        "cargo-bazel",
+        "manual",
+        "noclippy",
+        "norustfmt",
+    ],
+    tools = select_with_or({
+        "//conditions:default": [
+        ],
+    }),
+    version = "1.0.33",
+    visibility = ["//visibility:private"],
+    deps = [
+    ] + select_with_or({
+        "//conditions:default": [
+        ],
+    }),
+)
+
+alias(
+    # Because `cargo_build_script` does some invisible target name mutating to
+    # determine the package and crate name for a build script, the Bazel
+    # target namename of any build script cannot be the Cargo canonical name
+    # of `build_script_build` without losing out on having certain Cargo
+    # environment variables set.
+    name = "build_script_build",
+    actual = "proc-macro2_build_script",
+    tags = [
+        "manual",
+    ],
+)
diff --git a/util/import/3rdparty/crates/BUILD.quickcheck-1.0.3.bazel b/util/import/3rdparty/crates/BUILD.quickcheck-1.0.3.bazel
new file mode 100644
index 0000000..d516d60
--- /dev/null
+++ b/util/import/3rdparty/crates/BUILD.quickcheck-1.0.3.bazel
@@ -0,0 +1,98 @@
+###############################################################################
+# @generated
+# DO NOT MODIFY: This file is auto-generated by a crate_universe tool. To
+# regenerate this file, run the following:
+#
+#     bazel run //util/import/3rdparty:crates_vendor
+###############################################################################
+
+load(
+    "@bazel_skylib//lib:selects.bzl",
+    "selects",
+)
+
+# buildifier: disable=bzl-visibility
+load("@rules_rust//crate_universe/private:selects.bzl", "select_with_or")
+load(
+    "@rules_rust//rust:defs.bzl",
+    "rust_library",
+)
+
+package(default_visibility = ["//visibility:public"])
+
+# licenses([
+#     "TODO",  # Unlicense/MIT
+# ])
+
+rust_library(
+    name = "quickcheck",
+    srcs = glob(
+        include = [
+            "**/*.rs",
+        ],
+        exclude = [
+        ],
+    ),
+    aliases = selects.with_or({
+        "//conditions:default": {
+        },
+    }),
+    compile_data = glob(
+        include = ["**"],
+        exclude = [
+            "BUILD",
+            "BUILD.bazel",
+            "WORKSPACE",
+            "WORKSPACE.bazel",
+        ],
+    ) + select_with_or({
+        "//conditions:default": [
+        ],
+    }),
+    crate_features = [
+        "default",
+        "env_logger",
+        "log",
+        "regex",
+        "use_logging",
+    ],
+    crate_root = "src/lib.rs",
+    data = select_with_or({
+        "//conditions:default": [
+        ],
+    }),
+    edition = "2018",
+    proc_macro_deps = [
+    ] + select_with_or({
+        "//conditions:default": [
+        ],
+    }),
+    rustc_env = {
+    },
+    rustc_env_files = select_with_or({
+        "//conditions:default": [
+        ],
+    }),
+    rustc_flags = [
+        # In most cases, warnings in 3rd party crates are not interesting as
+        # they're out of the control of consumers. The flag here silences
+        # warnings. For more details see:
+        # https://doc.rust-lang.org/rustc/lints/levels.html
+        "--cap-lints=allow",
+    ],
+    tags = [
+        "cargo-bazel",
+        "manual",
+        "noclippy",
+        "norustfmt",
+    ],
+    version = "1.0.3",
+    deps = [
+    ] + select_with_or({
+        "//conditions:default": [
+            "@rules_rust_util_import__env_logger-0.8.4//:env_logger",
+            "@rules_rust_util_import__log-0.4.17//:log",
+            "@rules_rust_util_import__rand-0.8.5//:rand",
+        ],
+    }),
+)
diff --git a/util/import/3rdparty/crates/BUILD.quote-1.0.10.bazel b/util/import/3rdparty/crates/BUILD.quote-1.0.10.bazel
new file mode 100644
index 0000000..c94b5b5
--- /dev/null
+++ b/util/import/3rdparty/crates/BUILD.quote-1.0.10.bazel
@@ -0,0 +1,93 @@
+###############################################################################
+# @generated
+# DO NOT MODIFY: This file is auto-generated by a crate_universe tool. To
+# regenerate this file, run the following:
+#
+#     bazel run //util/import/3rdparty:crates_vendor
+###############################################################################
+
+load(
+    "@bazel_skylib//lib:selects.bzl",
+    "selects",
+)
+
+# buildifier: disable=bzl-visibility
+load("@rules_rust//crate_universe/private:selects.bzl", "select_with_or")
+load(
+    "@rules_rust//rust:defs.bzl",
+    "rust_library",
+)
+
+package(default_visibility = ["//visibility:public"])
+
+# licenses([
+#     "TODO",  # MIT OR Apache-2.0
+# ])
+
+rust_library(
+    name = "quote",
+    srcs = glob(
+        include = [
+            "**/*.rs",
+        ],
+        exclude = [
+        ],
+    ),
+    aliases = selects.with_or({
+        "//conditions:default": {
+        },
+    }),
+    compile_data = glob(
+        include = ["**"],
+        exclude = [
+            "BUILD",
+            "BUILD.bazel",
+            "WORKSPACE",
+            "WORKSPACE.bazel",
+        ],
+    ) + select_with_or({
+        "//conditions:default": [
+        ],
+    }),
+    crate_features = [
+        "default",
+        "proc-macro",
+    ],
+    crate_root = "src/lib.rs",
+    data = select_with_or({
+        "//conditions:default": [
+        ],
+    }),
+    edition = "2018",
+    proc_macro_deps = [
+    ] + select_with_or({
+        "//conditions:default": [
+        ],
+    }),
+    rustc_env = {
+    },
+    rustc_env_files = select_with_or({
+        "//conditions:default": [
+        ],
+    }),
+    rustc_flags = [
+        # In most cases, warnings in 3rd party crates are not interesting as
+        # they're out of the control of consumers. The flag here silences
+        # warnings. For more details see:
+        # https://doc.rust-lang.org/rustc/lints/levels.html
+        "--cap-lints=allow",
+    ],
+    tags = [
+        "cargo-bazel",
+        "manual",
+        "noclippy",
+        "norustfmt",
+    ],
+    version = "1.0.10",
+    deps = [
+    ] + select_with_or({
+        "//conditions:default": [
+            "@rules_rust_util_import__proc-macro2-1.0.33//:proc_macro2",
+        ],
+    }),
+)
diff --git a/util/import/3rdparty/crates/BUILD.rand-0.8.5.bazel b/util/import/3rdparty/crates/BUILD.rand-0.8.5.bazel
new file mode 100644
index 0000000..890cfd6
--- /dev/null
+++ b/util/import/3rdparty/crates/BUILD.rand-0.8.5.bazel
@@ -0,0 +1,93 @@
+###############################################################################
+# @generated
+# DO NOT MODIFY: This file is auto-generated by a crate_universe tool. To
+# regenerate this file, run the following:
+#
+#     bazel run //util/import/3rdparty:crates_vendor
+###############################################################################
+
+load(
+    "@bazel_skylib//lib:selects.bzl",
+    "selects",
+)
+
+# buildifier: disable=bzl-visibility
+load("@rules_rust//crate_universe/private:selects.bzl", "select_with_or")
+load(
+    "@rules_rust//rust:defs.bzl",
+    "rust_library",
+)
+
+package(default_visibility = ["//visibility:public"])
+
+# licenses([
+#     "TODO",  # MIT OR Apache-2.0
+# ])
+
+rust_library(
+    name = "rand",
+    srcs = glob(
+        include = [
+            "**/*.rs",
+        ],
+        exclude = [
+        ],
+    ),
+    aliases = selects.with_or({
+        "//conditions:default": {
+        },
+    }),
+    compile_data = glob(
+        include = ["**"],
+        exclude = [
+            "BUILD",
+            "BUILD.bazel",
+            "WORKSPACE",
+            "WORKSPACE.bazel",
+        ],
+    ) + select_with_or({
+        "//conditions:default": [
+        ],
+    }),
+    crate_features = [
+        "getrandom",
+        "small_rng",
+    ],
+    crate_root = "src/lib.rs",
+    data = select_with_or({
+        "//conditions:default": [
+        ],
+    }),
+    edition = "2018",
+    proc_macro_deps = [
+    ] + select_with_or({
+        "//conditions:default": [
+        ],
+    }),
+    rustc_env = {
+    },
+    rustc_env_files = select_with_or({
+        "//conditions:default": [
+        ],
+    }),
+    rustc_flags = [
+        # In most cases, warnings in 3rd party crates are not interesting as
+        # they're out of the control of consumers. The flag here silences
+        # warnings. For more details see:
+        # https://doc.rust-lang.org/rustc/lints/levels.html
+        "--cap-lints=allow",
+    ],
+    tags = [
+        "cargo-bazel",
+        "manual",
+        "noclippy",
+        "norustfmt",
+    ],
+    version = "0.8.5",
+    deps = [
+    ] + select_with_or({
+        "//conditions:default": [
+            "@rules_rust_util_import__rand_core-0.6.3//:rand_core",
+        ],
+    }),
+)
diff --git a/util/import/3rdparty/crates/BUILD.rand_core-0.6.3.bazel b/util/import/3rdparty/crates/BUILD.rand_core-0.6.3.bazel
new file mode 100644
index 0000000..6376096
--- /dev/null
+++ b/util/import/3rdparty/crates/BUILD.rand_core-0.6.3.bazel
@@ -0,0 +1,92 @@
+###############################################################################
+# @generated
+# DO NOT MODIFY: This file is auto-generated by a crate_universe tool. To
+# regenerate this file, run the following:
+#
+#     bazel run //util/import/3rdparty:crates_vendor
+###############################################################################
+
+load(
+    "@bazel_skylib//lib:selects.bzl",
+    "selects",
+)
+
+# buildifier: disable=bzl-visibility
+load("@rules_rust//crate_universe/private:selects.bzl", "select_with_or")
+load(
+    "@rules_rust//rust:defs.bzl",
+    "rust_library",
+)
+
+package(default_visibility = ["//visibility:public"])
+
+# licenses([
+#     "TODO",  # MIT OR Apache-2.0
+# ])
+
+rust_library(
+    name = "rand_core",
+    srcs = glob(
+        include = [
+            "**/*.rs",
+        ],
+        exclude = [
+        ],
+    ),
+    aliases = selects.with_or({
+        "//conditions:default": {
+        },
+    }),
+    compile_data = glob(
+        include = ["**"],
+        exclude = [
+            "BUILD",
+            "BUILD.bazel",
+            "WORKSPACE",
+            "WORKSPACE.bazel",
+        ],
+    ) + select_with_or({
+        "//conditions:default": [
+        ],
+    }),
+    crate_features = [
+        "getrandom",
+    ],
+    crate_root = "src/lib.rs",
+    data = select_with_or({
+        "//conditions:default": [
+        ],
+    }),
+    edition = "2018",
+    proc_macro_deps = [
+    ] + select_with_or({
+        "//conditions:default": [
+        ],
+    }),
+    rustc_env = {
+    },
+    rustc_env_files = select_with_or({
+        "//conditions:default": [
+        ],
+    }),
+    rustc_flags = [
+        # In most cases, warnings in 3rd party crates are not interesting as
+        # they're out of the control of consumers. The flag here silences
+        # warnings. For more details see:
+        # https://doc.rust-lang.org/rustc/lints/levels.html
+        "--cap-lints=allow",
+    ],
+    tags = [
+        "cargo-bazel",
+        "manual",
+        "noclippy",
+        "norustfmt",
+    ],
+    version = "0.6.3",
+    deps = [
+    ] + select_with_or({
+        "//conditions:default": [
+            "@rules_rust_util_import__getrandom-0.2.7//:getrandom",
+        ],
+    }),
+)
diff --git a/util/import/3rdparty/crates/BUILD.regex-1.4.6.bazel b/util/import/3rdparty/crates/BUILD.regex-1.4.6.bazel
new file mode 100644
index 0000000..4968002
--- /dev/null
+++ b/util/import/3rdparty/crates/BUILD.regex-1.4.6.bazel
@@ -0,0 +1,101 @@
+###############################################################################
+# @generated
+# DO NOT MODIFY: This file is auto-generated by a crate_universe tool. To
+# regenerate this file, run the following:
+#
+#     bazel run //util/import/3rdparty:crates_vendor
+###############################################################################
+
+load(
+    "@bazel_skylib//lib:selects.bzl",
+    "selects",
+)
+
+# buildifier: disable=bzl-visibility
+load("@rules_rust//crate_universe/private:selects.bzl", "select_with_or")
+load(
+    "@rules_rust//rust:defs.bzl",
+    "rust_library",
+)
+
+package(default_visibility = ["//visibility:public"])
+
+# licenses([
+#     "TODO",  # MIT OR Apache-2.0
+# ])
+
+rust_library(
+    name = "regex",
+    srcs = glob(
+        include = [
+            "**/*.rs",
+        ],
+        exclude = [
+        ],
+    ),
+    aliases = selects.with_or({
+        "//conditions:default": {
+        },
+    }),
+    compile_data = glob(
+        include = ["**"],
+        exclude = [
+            "BUILD",
+            "BUILD.bazel",
+            "WORKSPACE",
+            "WORKSPACE.bazel",
+        ],
+    ) + select_with_or({
+        "//conditions:default": [
+        ],
+    }),
+    crate_features = [
+        "aho-corasick",
+        "memchr",
+        "perf",
+        "perf-cache",
+        "perf-dfa",
+        "perf-inline",
+        "perf-literal",
+        "std",
+    ],
+    crate_root = "src/lib.rs",
+    data = select_with_or({
+        "//conditions:default": [
+        ],
+    }),
+    edition = "2015",
+    proc_macro_deps = [
+    ] + select_with_or({
+        "//conditions:default": [
+        ],
+    }),
+    rustc_env = {
+    },
+    rustc_env_files = select_with_or({
+        "//conditions:default": [
+        ],
+    }),
+    rustc_flags = [
+        # In most cases, warnings in 3rd party crates are not interesting as
+        # they're out of the control of consumers. The flag here silences
+        # warnings. For more details see:
+        # https://doc.rust-lang.org/rustc/lints/levels.html
+        "--cap-lints=allow",
+    ],
+    tags = [
+        "cargo-bazel",
+        "manual",
+        "noclippy",
+        "norustfmt",
+    ],
+    version = "1.4.6",
+    deps = [
+    ] + select_with_or({
+        "//conditions:default": [
+            "@rules_rust_util_import__aho-corasick-0.7.15//:aho_corasick",
+            "@rules_rust_util_import__memchr-2.5.0//:memchr",
+            "@rules_rust_util_import__regex-syntax-0.6.27//:regex_syntax",
+        ],
+    }),
+)
diff --git a/util/import/3rdparty/crates/BUILD.regex-syntax-0.6.27.bazel b/util/import/3rdparty/crates/BUILD.regex-syntax-0.6.27.bazel
new file mode 100644
index 0000000..cadf7fe
--- /dev/null
+++ b/util/import/3rdparty/crates/BUILD.regex-syntax-0.6.27.bazel
@@ -0,0 +1,90 @@
+###############################################################################
+# @generated
+# DO NOT MODIFY: This file is auto-generated by a crate_universe tool. To
+# regenerate this file, run the following:
+#
+#     bazel run //util/import/3rdparty:crates_vendor
+###############################################################################
+
+load(
+    "@bazel_skylib//lib:selects.bzl",
+    "selects",
+)
+
+# buildifier: disable=bzl-visibility
+load("@rules_rust//crate_universe/private:selects.bzl", "select_with_or")
+load(
+    "@rules_rust//rust:defs.bzl",
+    "rust_library",
+)
+
+package(default_visibility = ["//visibility:public"])
+
+# licenses([
+#     "TODO",  # MIT OR Apache-2.0
+# ])
+
+rust_library(
+    name = "regex_syntax",
+    srcs = glob(
+        include = [
+            "**/*.rs",
+        ],
+        exclude = [
+        ],
+    ),
+    aliases = selects.with_or({
+        "//conditions:default": {
+        },
+    }),
+    compile_data = glob(
+        include = ["**"],
+        exclude = [
+            "BUILD",
+            "BUILD.bazel",
+            "WORKSPACE",
+            "WORKSPACE.bazel",
+        ],
+    ) + select_with_or({
+        "//conditions:default": [
+        ],
+    }),
+    crate_features = [
+    ],
+    crate_root = "src/lib.rs",
+    data = select_with_or({
+        "//conditions:default": [
+        ],
+    }),
+    edition = "2018",
+    proc_macro_deps = [
+    ] + select_with_or({
+        "//conditions:default": [
+        ],
+    }),
+    rustc_env = {
+    },
+    rustc_env_files = select_with_or({
+        "//conditions:default": [
+        ],
+    }),
+    rustc_flags = [
+        # In most cases, warnings in 3rd party crates are not interesting as
+        # they're out of the control of consumers. The flag here silences
+        # warnings. For more details see:
+        # https://doc.rust-lang.org/rustc/lints/levels.html
+        "--cap-lints=allow",
+    ],
+    tags = [
+        "cargo-bazel",
+        "manual",
+        "noclippy",
+        "norustfmt",
+    ],
+    version = "0.6.27",
+    deps = [
+    ] + select_with_or({
+        "//conditions:default": [
+        ],
+    }),
+)
diff --git a/util/import/3rdparty/crates/BUILD.syn-1.0.82.bazel b/util/import/3rdparty/crates/BUILD.syn-1.0.82.bazel
new file mode 100644
index 0000000..c2cc5c8
--- /dev/null
+++ b/util/import/3rdparty/crates/BUILD.syn-1.0.82.bazel
@@ -0,0 +1,191 @@
+###############################################################################
+# @generated
+# DO NOT MODIFY: This file is auto-generated by a crate_universe tool. To
+# regenerate this file, run the following:
+#
+#     bazel run //util/import/3rdparty:crates_vendor
+###############################################################################
+
+load(
+    "@bazel_skylib//lib:selects.bzl",
+    "selects",
+)
+load(
+    "@rules_rust//cargo:defs.bzl",
+    "cargo_build_script",
+)
+
+# buildifier: disable=bzl-visibility
+load("@rules_rust//crate_universe/private:selects.bzl", "select_with_or")
+load(
+    "@rules_rust//rust:defs.bzl",
+    "rust_library",
+)
+
+package(default_visibility = ["//visibility:public"])
+
+# licenses([
+#     "TODO",  # MIT OR Apache-2.0
+# ])
+
+rust_library(
+    name = "syn",
+    srcs = glob(
+        include = [
+            "**/*.rs",
+        ],
+        exclude = [
+        ],
+    ),
+    aliases = selects.with_or({
+        "//conditions:default": {
+        },
+    }),
+    compile_data = glob(
+        include = ["**"],
+        exclude = [
+            "BUILD",
+            "BUILD.bazel",
+            "WORKSPACE",
+            "WORKSPACE.bazel",
+        ],
+    ) + select_with_or({
+        "//conditions:default": [
+        ],
+    }),
+    crate_features = [
+        "clone-impls",
+        "default",
+        "derive",
+        "parsing",
+        "printing",
+        "proc-macro",
+        "quote",
+    ],
+    crate_root = "src/lib.rs",
+    data = select_with_or({
+        "//conditions:default": [
+        ],
+    }),
+    edition = "2018",
+    proc_macro_deps = [
+    ] + select_with_or({
+        "//conditions:default": [
+        ],
+    }),
+    rustc_env = {
+    },
+    rustc_env_files = select_with_or({
+        "//conditions:default": [
+        ],
+    }),
+    rustc_flags = [
+        # In most cases, warnings in 3rd party crates are not interesting as
+        # they're out of the control of consumers. The flag here silences
+        # warnings. For more details see:
+        # https://doc.rust-lang.org/rustc/lints/levels.html
+        "--cap-lints=allow",
+    ],
+    tags = [
+        "cargo-bazel",
+        "manual",
+        "noclippy",
+        "norustfmt",
+    ],
+    version = "1.0.82",
+    deps = [
+    ] + select_with_or({
+        "//conditions:default": [
+            "@rules_rust_util_import__proc-macro2-1.0.33//:proc_macro2",
+            "@rules_rust_util_import__quote-1.0.10//:quote",
+            "@rules_rust_util_import__syn-1.0.82//:build_script_build",
+            "@rules_rust_util_import__unicode-xid-0.2.3//:unicode_xid",
+        ],
+    }),
+)
+
+cargo_build_script(
+    # See comment associated with alias. Do not change this name
+    name = "syn_build_script",
+    srcs = glob(
+        include = [
+            "**/*.rs",
+        ],
+        exclude = [
+        ],
+    ),
+    aliases = selects.with_or({
+        "//conditions:default": {
+        },
+    }),
+    build_script_env = {
+    },
+    compile_data = select_with_or({
+        "//conditions:default": [
+        ],
+    }),
+    crate_features = [
+        "clone-impls",
+        "default",
+        "derive",
+        "parsing",
+        "printing",
+        "proc-macro",
+        "quote",
+    ],
+    crate_name = "build_script_build",
+    crate_root = "build.rs",
+    data = glob(["**"]) + select_with_or({
+        "//conditions:default": [
+        ],
+    }),
+    edition = "2018",
+    proc_macro_deps = [
+    ] + select_with_or({
+        "//conditions:default": [
+        ],
+    }),
+    rustc_env = {
+    },
+    rustc_env_files = select_with_or({
+        "//conditions:default": [
+        ],
+    }),
+    rustc_flags = [
+        # In most cases, warnings in 3rd party crates are not interesting as
+        # they're out of the control of consumers. The flag here silences
+        # warnings. For more details see:
+        # https://doc.rust-lang.org/rustc/lints/levels.html
+        "--cap-lints=allow",
+    ],
+    tags = [
+        "cargo-bazel",
+        "manual",
+        "noclippy",
+        "norustfmt",
+    ],
+    tools = select_with_or({
+        "//conditions:default": [
+        ],
+    }),
+    version = "1.0.82",
+    visibility = ["//visibility:private"],
+    deps = [
+    ] + select_with_or({
+        "//conditions:default": [
+        ],
+    }),
+)
+
+alias(
+    # Because `cargo_build_script` does some invisible target name mutating to
+    # determine the package and crate name for a build script, the Bazel
+    # target namename of any build script cannot be the Cargo canonical name
+    # of `build_script_build` without losing out on having certain Cargo
+    # environment variables set.
+    name = "build_script_build",
+    actual = "syn_build_script",
+    tags = [
+        "manual",
+    ],
+)
diff --git a/util/import/3rdparty/crates/BUILD.unicode-xid-0.2.3.bazel b/util/import/3rdparty/crates/BUILD.unicode-xid-0.2.3.bazel
new file mode 100644
index 0000000..5405857
--- /dev/null
+++ b/util/import/3rdparty/crates/BUILD.unicode-xid-0.2.3.bazel
@@ -0,0 +1,91 @@
+###############################################################################
+# @generated
+# DO NOT MODIFY: This file is auto-generated by a crate_universe tool. To
+# regenerate this file, run the following:
+#
+#     bazel run //util/import/3rdparty:crates_vendor
+###############################################################################
+
+load(
+    "@bazel_skylib//lib:selects.bzl",
+    "selects",
+)
+
+# buildifier: disable=bzl-visibility
+load("@rules_rust//crate_universe/private:selects.bzl", "select_with_or")
+load(
+    "@rules_rust//rust:defs.bzl",
+    "rust_library",
+)
+
+package(default_visibility = ["//visibility:public"])
+
+# licenses([
+#     "TODO",  # MIT OR Apache-2.0
+# ])
+
+rust_library(
+    name = "unicode_xid",
+    srcs = glob(
+        include = [
+            "**/*.rs",
+        ],
+        exclude = [
+        ],
+    ),
+    aliases = selects.with_or({
+        "//conditions:default": {
+        },
+    }),
+    compile_data = glob(
+        include = ["**"],
+        exclude = [
+            "BUILD",
+            "BUILD.bazel",
+            "WORKSPACE",
+            "WORKSPACE.bazel",
+        ],
+    ) + select_with_or({
+        "//conditions:default": [
+        ],
+    }),
+    crate_features = [
+        "default",
+    ],
+    crate_root = "src/lib.rs",
+    data = select_with_or({
+        "//conditions:default": [
+        ],
+    }),
+    edition = "2015",
+    proc_macro_deps = [
+    ] + select_with_or({
+        "//conditions:default": [
+        ],
+    }),
+    rustc_env = {
+    },
+    rustc_env_files = select_with_or({
+        "//conditions:default": [
+        ],
+    }),
+    rustc_flags = [
+        # In most cases, warnings in 3rd party crates are not interesting as
+        # they're out of the control of consumers. The flag here silences
+        # warnings. For more details see:
+        # https://doc.rust-lang.org/rustc/lints/levels.html
+        "--cap-lints=allow",
+    ],
+    tags = [
+        "cargo-bazel",
+        "manual",
+        "noclippy",
+        "norustfmt",
+    ],
+    version = "0.2.3",
+    deps = [
+    ] + select_with_or({
+        "//conditions:default": [
+        ],
+    }),
+)
diff --git a/util/import/3rdparty/crates/BUILD.wasi-0.11.0+wasi-snapshot-preview1.bazel b/util/import/3rdparty/crates/BUILD.wasi-0.11.0+wasi-snapshot-preview1.bazel
new file mode 100644
index 0000000..02de946
--- /dev/null
+++ b/util/import/3rdparty/crates/BUILD.wasi-0.11.0+wasi-snapshot-preview1.bazel
@@ -0,0 +1,92 @@
+###############################################################################
+# @generated
+# DO NOT MODIFY: This file is auto-generated by a crate_universe tool. To
+# regenerate this file, run the following:
+#
+#     bazel run //util/import/3rdparty:crates_vendor
+###############################################################################
+
+load(
+    "@bazel_skylib//lib:selects.bzl",
+    "selects",
+)
+
+# buildifier: disable=bzl-visibility
+load("@rules_rust//crate_universe/private:selects.bzl", "select_with_or")
+load(
+    "@rules_rust//rust:defs.bzl",
+    "rust_library",
+)
+
+package(default_visibility = ["//visibility:public"])
+
+# licenses([
+#     "TODO",  # Apache-2.0 WITH LLVM-exception OR Apache-2.0 OR MIT
+# ])
+
+rust_library(
+    name = "wasi",
+    srcs = glob(
+        include = [
+            "**/*.rs",
+        ],
+        exclude = [
+        ],
+    ),
+    aliases = selects.with_or({
+        "//conditions:default": {
+        },
+    }),
+    compile_data = glob(
+        include = ["**"],
+        exclude = [
+            "BUILD",
+            "BUILD.bazel",
+            "WORKSPACE",
+            "WORKSPACE.bazel",
+        ],
+    ) + select_with_or({
+        "//conditions:default": [
+        ],
+    }),
+    crate_features = [
+        "default",
+        "std",
+    ],
+    crate_root = "src/lib.rs",
+    data = select_with_or({
+        "//conditions:default": [
+        ],
+    }),
+    edition = "2018",
+    proc_macro_deps = [
+    ] + select_with_or({
+        "//conditions:default": [
+        ],
+    }),
+    rustc_env = {
+    },
+    rustc_env_files = select_with_or({
+        "//conditions:default": [
+        ],
+    }),
+    rustc_flags = [
+        # In most cases, warnings in 3rd party crates are not interesting as
+        # they're out of the control of consumers. The flag here silences
+        # warnings. For more details see:
+        # https://doc.rust-lang.org/rustc/lints/levels.html
+        "--cap-lints=allow",
+    ],
+    tags = [
+        "cargo-bazel",
+        "manual",
+        "noclippy",
+        "norustfmt",
+    ],
+    version = "0.11.0+wasi-snapshot-preview1",
+    deps = [
+    ] + select_with_or({
+        "//conditions:default": [
+        ],
+    }),
+)
diff --git a/util/import/3rdparty/crates/crates.bzl b/util/import/3rdparty/crates/crates.bzl
new file mode 100644
index 0000000..fc608af
--- /dev/null
+++ b/util/import/3rdparty/crates/crates.bzl
@@ -0,0 +1,25 @@
+###############################################################################
+# @generated
+# This file is auto-generated by the cargo-bazel tool.
+#
+# DO NOT MODIFY: Local changes may be replaced in future executions.
+###############################################################################
+"""Rules for defining repositories for remote `crates_vendor` repositories"""
+
+load("@bazel_tools//tools/build_defs/repo:utils.bzl", "maybe")
+
+# buildifier: disable=bzl-visibility
+load("@rules_rust//crate_universe/private:crates_vendor.bzl", "crates_vendor_remote_repository")
+
+# buildifier: disable=bzl-visibility
+load("@rules_rust//util/import/3rdparty/crates:defs.bzl", _crate_repositories = "crate_repositories")
+
+def crate_repositories():
+    maybe(
+        crates_vendor_remote_repository,
+        name = "rules_rust_util_import",
+        build_file = Label("@rules_rust//util/import/3rdparty/crates:BUILD.bazel"),
+        defs_module = Label("@rules_rust//util/import/3rdparty/crates:defs.bzl"),
+    )
+
+    _crate_repositories()
diff --git a/util/import/3rdparty/crates/defs.bzl b/util/import/3rdparty/crates/defs.bzl
new file mode 100644
index 0000000..8bf2778
--- /dev/null
+++ b/util/import/3rdparty/crates/defs.bzl
@@ -0,0 +1,548 @@
+###############################################################################
+# @generated
+# DO NOT MODIFY: This file is auto-generated by a crate_universe tool. To
+# regenerate this file, run the following:
+#
+#     bazel run //util/import/3rdparty:crates_vendor
+###############################################################################
+"""
+# `crates_repository` API
+
+- [aliases](#aliases)
+- [crate_deps](#crate_deps)
+- [all_crate_deps](#all_crate_deps)
+- [crate_repositories](#crate_repositories)
+
+"""
+
+load("@bazel_skylib//lib:selects.bzl", "selects")
+load("@bazel_tools//tools/build_defs/repo:http.bzl", "http_archive")
+load("@bazel_tools//tools/build_defs/repo:utils.bzl", "maybe")
+
+###############################################################################
+# MACROS API
+###############################################################################
+
+# An identifier that represent common dependencies (unconditional).
+_COMMON_CONDITION = ""
+
+def _flatten_dependency_maps(all_dependency_maps):
+    """Flatten a list of dependency maps into one dictionary.
+
+    Dependency maps have the following structure:
+
+    ```python
+    DEPENDENCIES_MAP = {
+        # The first key in the map is a Bazel package
+        # name of the workspace this file is defined in.
+        "workspace_member_package": {
+
+            # Not all dependnecies are supported for all platforms.
+            # the condition key is the condition required to be true
+            # on the host platform.
+            "condition": {
+
+                # An alias to a crate target.     # The label of the crate target the
+                # Aliases are only crate names.   # package name refers to.
+                "package_name":                   "@full//:label",
+            }
+        }
+    }
+    ```
+
+    Args:
+        all_dependency_maps (list): A list of dicts as described above
+
+    Returns:
+        dict: A dictionary as described above
+    """
+    dependencies = {}
+
+    for workspace_deps_map in all_dependency_maps:
+        for pkg_name, conditional_deps_map in workspace_deps_map.items():
+            if pkg_name not in dependencies:
+                non_frozen_map = dict()
+                for key, values in conditional_deps_map.items():
+                    non_frozen_map.update({key: dict(values.items())})
+                dependencies.setdefault(pkg_name, non_frozen_map)
+                continue
+
+            for condition, deps_map in conditional_deps_map.items():
+                # If the condition has not been recorded, do so and continue
+                if condition not in dependencies[pkg_name]:
+                    dependencies[pkg_name].setdefault(condition, dict(deps_map.items()))
+                    continue
+
+                # Alert on any miss-matched dependencies
+                inconsistent_entries = []
+                for crate_name, crate_label in deps_map.items():
+                    existing = dependencies[pkg_name][condition].get(crate_name)
+                    if existing and existing != crate_label:
+                        inconsistent_entries.append((crate_name, existing, crate_label))
+                    dependencies[pkg_name][condition].update({crate_name: crate_label})
+
+    return dependencies
+
+def crate_deps(deps, package_name = None):
+    """Finds the fully qualified label of the requested crates for the package where this macro is called.
+
+    Args:
+        deps (list): The desired list of crate targets.
+        package_name (str, optional): The package name of the set of dependencies to look up.
+            Defaults to `native.package_name()`.
+
+    Returns:
+        list: A list of labels to generated rust targets (str)
+    """
+
+    if not deps:
+        return []
+
+    if package_name == None:
+        package_name = native.package_name()
+
+    # Join both sets of dependencies
+    dependencies = _flatten_dependency_maps([
+        _NORMAL_DEPENDENCIES,
+        _NORMAL_DEV_DEPENDENCIES,
+        _PROC_MACRO_DEPENDENCIES,
+        _PROC_MACRO_DEV_DEPENDENCIES,
+        _BUILD_DEPENDENCIES,
+        _BUILD_PROC_MACRO_DEPENDENCIES,
+    ]).pop(package_name, {})
+
+    # Combine all conditional packages so we can easily index over a flat list
+    # TODO: Perhaps this should actually return select statements and maintain
+    # the conditionals of the dependencies
+    flat_deps = {}
+    for deps_set in dependencies.values():
+        for crate_name, crate_label in deps_set.items():
+            flat_deps.update({crate_name: crate_label})
+
+    missing_crates = []
+    crate_targets = []
+    for crate_target in deps:
+        if crate_target not in flat_deps:
+            missing_crates.append(crate_target)
+        else:
+            crate_targets.append(flat_deps[crate_target])
+
+    if missing_crates:
+        fail("Could not find crates `{}` among dependencies of `{}`. Available dependencies were `{}`".format(
+            missing_crates,
+            package_name,
+            dependencies,
+        ))
+
+    return crate_targets
+
+def all_crate_deps(
+        normal = False,
+        normal_dev = False,
+        proc_macro = False,
+        proc_macro_dev = False,
+        build = False,
+        build_proc_macro = False,
+        package_name = None):
+    """Finds the fully qualified label of all requested direct crate dependencies \
+    for the package where this macro is called.
+
+    If no parameters are set, all normal dependencies are returned. Setting any one flag will
+    otherwise impact the contents of the returned list.
+
+    Args:
+        normal (bool, optional): If True, normal dependencies are included in the
+            output list.
+        normal_dev (bool, optional): If True, normla dev dependencies will be
+            included in the output list..
+        proc_macro (bool, optional): If True, proc_macro dependencies are included
+            in the output list.
+        proc_macro_dev (bool, optional): If True, dev proc_macro dependencies are
+            included in the output list.
+        build (bool, optional): If True, build dependencies are included
+            in the output list.
+        build_proc_macro (bool, optional): If True, build proc_macro dependencies are
+            included in the output list.
+        package_name (str, optional): The package name of the set of dependencies to look up.
+            Defaults to `native.package_name()` when unset.
+
+    Returns:
+        list: A list of labels to generated rust targets (str)
+    """
+
+    if package_name == None:
+        package_name = native.package_name()
+
+    # Determine the relevant maps to use
+    all_dependency_maps = []
+    if normal:
+        all_dependency_maps.append(_NORMAL_DEPENDENCIES)
+    if normal_dev:
+        all_dependency_maps.append(_NORMAL_DEV_DEPENDENCIES)
+    if proc_macro:
+        all_dependency_maps.append(_PROC_MACRO_DEPENDENCIES)
+    if proc_macro_dev:
+        all_dependency_maps.append(_PROC_MACRO_DEV_DEPENDENCIES)
+    if build:
+        all_dependency_maps.append(_BUILD_DEPENDENCIES)
+    if build_proc_macro:
+        all_dependency_maps.append(_BUILD_PROC_MACRO_DEPENDENCIES)
+
+    # Default to always using normal dependencies
+    if not all_dependency_maps:
+        all_dependency_maps.append(_NORMAL_DEPENDENCIES)
+
+    dependencies = _flatten_dependency_maps(all_dependency_maps).pop(package_name, None)
+
+    if not dependencies:
+        if dependencies == None:
+            fail("Tried to get all_crate_deps for package " + package_name + " but that package had no Cargo.toml file")
+        else:
+            return []
+
+    crate_deps = list(dependencies.pop(_COMMON_CONDITION, {}).values())
+    for condition, deps in dependencies.items():
+        crate_deps += selects.with_or({_CONDITIONS[condition]: deps.values()})
+
+    return crate_deps
+
+def aliases(
+        normal = False,
+        normal_dev = False,
+        proc_macro = False,
+        proc_macro_dev = False,
+        build = False,
+        build_proc_macro = False,
+        package_name = None):
+    """Produces a map of Crate alias names to their original label
+
+    If no dependency kinds are specified, `normal` and `proc_macro` are used by default.
+    Setting any one flag will otherwise determine the contents of the returned dict.
+
+    Args:
+        normal (bool, optional): If True, normal dependencies are included in the
+            output list.
+        normal_dev (bool, optional): If True, normla dev dependencies will be
+            included in the output list..
+        proc_macro (bool, optional): If True, proc_macro dependencies are included
+            in the output list.
+        proc_macro_dev (bool, optional): If True, dev proc_macro dependencies are
+            included in the output list.
+        build (bool, optional): If True, build dependencies are included
+            in the output list.
+        build_proc_macro (bool, optional): If True, build proc_macro dependencies are
+            included in the output list.
+        package_name (str, optional): The package name of the set of dependencies to look up.
+            Defaults to `native.package_name()` when unset.
+
+    Returns:
+        dict: The aliases of all associated packages
+    """
+    if package_name == None:
+        package_name = native.package_name()
+
+    # Determine the relevant maps to use
+    all_aliases_maps = []
+    if normal:
+        all_aliases_maps.append(_NORMAL_ALIASES)
+    if normal_dev:
+        all_aliases_maps.append(_NORMAL_DEV_ALIASES)
+    if proc_macro:
+        all_aliases_maps.append(_PROC_MACRO_ALIASES)
+    if proc_macro_dev:
+        all_aliases_maps.append(_PROC_MACRO_DEV_ALIASES)
+    if build:
+        all_aliases_maps.append(_BUILD_ALIASES)
+    if build_proc_macro:
+        all_aliases_maps.append(_BUILD_PROC_MACRO_ALIASES)
+
+    # Default to always using normal aliases
+    if not all_aliases_maps:
+        all_aliases_maps.append(_NORMAL_ALIASES)
+        all_aliases_maps.append(_PROC_MACRO_ALIASES)
+
+    aliases = _flatten_dependency_maps(all_aliases_maps).pop(package_name, None)
+
+    if not aliases:
+        return dict()
+
+    common_items = aliases.pop(_COMMON_CONDITION, {}).items()
+
+    # If there are only common items in the dictionary, immediately return them
+    if not len(aliases.keys()) == 1:
+        return dict(common_items)
+
+    # Build a single select statement where each conditional has accounted for the
+    # common set of aliases.
+    crate_aliases = {"//conditions:default": common_items}
+    for condition, deps in aliases.items():
+        condition_triples = _CONDITIONS[condition]
+        if condition_triples in crate_aliases:
+            crate_aliases[condition_triples].update(deps)
+        else:
+            crate_aliases.update({_CONDITIONS[condition]: dict(deps.items() + common_items)})
+
+    return selects.with_or(crate_aliases)
+
+###############################################################################
+# WORKSPACE MEMBER DEPS AND ALIASES
+###############################################################################
+
+_NORMAL_DEPENDENCIES = {
+    "": {
+        _COMMON_CONDITION: {
+            "aho-corasick": "@rules_rust_util_import__aho-corasick-0.7.15//:aho_corasick",
+            "lazy_static": "@rules_rust_util_import__lazy_static-1.4.0//:lazy_static",
+            "proc-macro2": "@rules_rust_util_import__proc-macro2-1.0.33//:proc_macro2",
+            "quickcheck": "@rules_rust_util_import__quickcheck-1.0.3//:quickcheck",
+            "quote": "@rules_rust_util_import__quote-1.0.10//:quote",
+            "syn": "@rules_rust_util_import__syn-1.0.82//:syn",
+        },
+    },
+}
+
+_NORMAL_ALIASES = {
+    "": {
+        _COMMON_CONDITION: {
+        },
+    },
+}
+
+_NORMAL_DEV_DEPENDENCIES = {
+    "": {
+    },
+}
+
+_NORMAL_DEV_ALIASES = {
+    "": {
+    },
+}
+
+_PROC_MACRO_DEPENDENCIES = {
+    "": {
+    },
+}
+
+_PROC_MACRO_ALIASES = {
+    "": {
+    },
+}
+
+_PROC_MACRO_DEV_DEPENDENCIES = {
+    "": {
+    },
+}
+
+_PROC_MACRO_DEV_ALIASES = {
+    "": {
+    },
+}
+
+_BUILD_DEPENDENCIES = {
+    "": {
+    },
+}
+
+_BUILD_ALIASES = {
+    "": {
+    },
+}
+
+_BUILD_PROC_MACRO_DEPENDENCIES = {
+    "": {
+    },
+}
+
+_BUILD_PROC_MACRO_ALIASES = {
+    "": {
+    },
+}
+
+_CONDITIONS = {
+    "cfg(target_os = \"wasi\")": ["wasm32-wasi"],
+    "cfg(unix)": ["aarch64-apple-darwin", "aarch64-apple-ios", "aarch64-apple-ios-sim", "aarch64-linux-android", "aarch64-unknown-linux-gnu", "arm-unknown-linux-gnueabi", "armv7-linux-androideabi", "armv7-unknown-linux-gnueabi", "i686-apple-darwin", "i686-linux-android", "i686-unknown-freebsd", "i686-unknown-linux-gnu", "powerpc-unknown-linux-gnu", "s390x-unknown-linux-gnu", "x86_64-apple-darwin", "x86_64-apple-ios", "x86_64-linux-android", "x86_64-unknown-freebsd", "x86_64-unknown-linux-gnu"],
+}
+
+###############################################################################
+
+def crate_repositories():
+    """A macro for defining repositories for all generated crates"""
+    maybe(
+        http_archive,
+        name = "rules_rust_util_import__aho-corasick-0.7.15",
+        sha256 = "7404febffaa47dac81aa44dba71523c9d069b1bdc50a77db41195149e17f68e5",
+        type = "tar.gz",
+        urls = ["https://crates.io/api/v1/crates/aho-corasick/0.7.15/download"],
+        strip_prefix = "aho-corasick-0.7.15",
+        build_file = Label("@rules_rust//util/import/3rdparty/crates:BUILD.aho-corasick-0.7.15.bazel"),
+    )
+
+    maybe(
+        http_archive,
+        name = "rules_rust_util_import__cfg-if-1.0.0",
+        sha256 = "baf1de4339761588bc0619e3cbc0120ee582ebb74b53b4efbf79117bd2da40fd",
+        type = "tar.gz",
+        urls = ["https://crates.io/api/v1/crates/cfg-if/1.0.0/download"],
+        strip_prefix = "cfg-if-1.0.0",
+        build_file = Label("@rules_rust//util/import/3rdparty/crates:BUILD.cfg-if-1.0.0.bazel"),
+    )
+
+    maybe(
+        http_archive,
+        name = "rules_rust_util_import__env_logger-0.8.4",
+        sha256 = "a19187fea3ac7e84da7dacf48de0c45d63c6a76f9490dae389aead16c243fce3",
+        type = "tar.gz",
+        urls = ["https://crates.io/api/v1/crates/env_logger/0.8.4/download"],
+        strip_prefix = "env_logger-0.8.4",
+        build_file = Label("@rules_rust//util/import/3rdparty/crates:BUILD.env_logger-0.8.4.bazel"),
+    )
+
+    maybe(
+        http_archive,
+        name = "rules_rust_util_import__getrandom-0.2.7",
+        sha256 = "4eb1a864a501629691edf6c15a593b7a51eebaa1e8468e9ddc623de7c9b58ec6",
+        type = "tar.gz",
+        urls = ["https://crates.io/api/v1/crates/getrandom/0.2.7/download"],
+        strip_prefix = "getrandom-0.2.7",
+        build_file = Label("@rules_rust//util/import/3rdparty/crates:BUILD.getrandom-0.2.7.bazel"),
+    )
+
+    maybe(
+        http_archive,
+        name = "rules_rust_util_import__lazy_static-1.4.0",
+        sha256 = "e2abad23fbc42b3700f2f279844dc832adb2b2eb069b2df918f455c4e18cc646",
+        type = "tar.gz",
+        urls = ["https://crates.io/api/v1/crates/lazy_static/1.4.0/download"],
+        strip_prefix = "lazy_static-1.4.0",
+        build_file = Label("@rules_rust//util/import/3rdparty/crates:BUILD.lazy_static-1.4.0.bazel"),
+    )
+
+    maybe(
+        http_archive,
+        name = "rules_rust_util_import__libc-0.2.126",
+        sha256 = "349d5a591cd28b49e1d1037471617a32ddcda5731b99419008085f72d5a53836",
+        type = "tar.gz",
+        urls = ["https://crates.io/api/v1/crates/libc/0.2.126/download"],
+        strip_prefix = "libc-0.2.126",
+        build_file = Label("@rules_rust//util/import/3rdparty/crates:BUILD.libc-0.2.126.bazel"),
+    )
+
+    maybe(
+        http_archive,
+        name = "rules_rust_util_import__log-0.4.17",
+        sha256 = "abb12e687cfb44aa40f41fc3978ef76448f9b6038cad6aef4259d3c095a2382e",
+        type = "tar.gz",
+        urls = ["https://crates.io/api/v1/crates/log/0.4.17/download"],
+        strip_prefix = "log-0.4.17",
+        build_file = Label("@rules_rust//util/import/3rdparty/crates:BUILD.log-0.4.17.bazel"),
+    )
+
+    maybe(
+        http_archive,
+        name = "rules_rust_util_import__memchr-2.5.0",
+        sha256 = "2dffe52ecf27772e601905b7522cb4ef790d2cc203488bbd0e2fe85fcb74566d",
+        type = "tar.gz",
+        urls = ["https://crates.io/api/v1/crates/memchr/2.5.0/download"],
+        strip_prefix = "memchr-2.5.0",
+        build_file = Label("@rules_rust//util/import/3rdparty/crates:BUILD.memchr-2.5.0.bazel"),
+    )
+
+    maybe(
+        http_archive,
+        name = "rules_rust_util_import__proc-macro2-1.0.33",
+        sha256 = "fb37d2df5df740e582f28f8560cf425f52bb267d872fe58358eadb554909f07a",
+        type = "tar.gz",
+        urls = ["https://crates.io/api/v1/crates/proc-macro2/1.0.33/download"],
+        strip_prefix = "proc-macro2-1.0.33",
+        build_file = Label("@rules_rust//util/import/3rdparty/crates:BUILD.proc-macro2-1.0.33.bazel"),
+    )
+
+    maybe(
+        http_archive,
+        name = "rules_rust_util_import__quickcheck-1.0.3",
+        sha256 = "588f6378e4dd99458b60ec275b4477add41ce4fa9f64dcba6f15adccb19b50d6",
+        type = "tar.gz",
+        urls = ["https://crates.io/api/v1/crates/quickcheck/1.0.3/download"],
+        strip_prefix = "quickcheck-1.0.3",
+        build_file = Label("@rules_rust//util/import/3rdparty/crates:BUILD.quickcheck-1.0.3.bazel"),
+    )
+
+    maybe(
+        http_archive,
+        name = "rules_rust_util_import__quote-1.0.10",
+        sha256 = "38bc8cc6a5f2e3655e0899c1b848643b2562f853f114bfec7be120678e3ace05",
+        type = "tar.gz",
+        urls = ["https://crates.io/api/v1/crates/quote/1.0.10/download"],
+        strip_prefix = "quote-1.0.10",
+        build_file = Label("@rules_rust//util/import/3rdparty/crates:BUILD.quote-1.0.10.bazel"),
+    )
+
+    maybe(
+        http_archive,
+        name = "rules_rust_util_import__rand-0.8.5",
+        sha256 = "34af8d1a0e25924bc5b7c43c079c942339d8f0a8b57c39049bef581b46327404",
+        type = "tar.gz",
+        urls = ["https://crates.io/api/v1/crates/rand/0.8.5/download"],
+        strip_prefix = "rand-0.8.5",
+        build_file = Label("@rules_rust//util/import/3rdparty/crates:BUILD.rand-0.8.5.bazel"),
+    )
+
+    maybe(
+        http_archive,
+        name = "rules_rust_util_import__rand_core-0.6.3",
+        sha256 = "d34f1408f55294453790c48b2f1ebbb1c5b4b7563eb1f418bcfcfdbb06ebb4e7",
+        type = "tar.gz",
+        urls = ["https://crates.io/api/v1/crates/rand_core/0.6.3/download"],
+        strip_prefix = "rand_core-0.6.3",
+        build_file = Label("@rules_rust//util/import/3rdparty/crates:BUILD.rand_core-0.6.3.bazel"),
+    )
+
+    maybe(
+        http_archive,
+        name = "rules_rust_util_import__regex-1.4.6",
+        sha256 = "2a26af418b574bd56588335b3a3659a65725d4e636eb1016c2f9e3b38c7cc759",
+        type = "tar.gz",
+        urls = ["https://crates.io/api/v1/crates/regex/1.4.6/download"],
+        strip_prefix = "regex-1.4.6",
+        build_file = Label("@rules_rust//util/import/3rdparty/crates:BUILD.regex-1.4.6.bazel"),
+    )
+
+    maybe(
+        http_archive,
+        name = "rules_rust_util_import__regex-syntax-0.6.27",
+        sha256 = "a3f87b73ce11b1619a3c6332f45341e0047173771e8b8b73f87bfeefb7b56244",
+        type = "tar.gz",
+        urls = ["https://crates.io/api/v1/crates/regex-syntax/0.6.27/download"],
+        strip_prefix = "regex-syntax-0.6.27",
+        build_file = Label("@rules_rust//util/import/3rdparty/crates:BUILD.regex-syntax-0.6.27.bazel"),
+    )
+
+    maybe(
+        http_archive,
+        name = "rules_rust_util_import__syn-1.0.82",
+        sha256 = "8daf5dd0bb60cbd4137b1b587d2fc0ae729bc07cf01cd70b36a1ed5ade3b9d59",
+        type = "tar.gz",
+        urls = ["https://crates.io/api/v1/crates/syn/1.0.82/download"],
+        strip_prefix = "syn-1.0.82",
+        build_file = Label("@rules_rust//util/import/3rdparty/crates:BUILD.syn-1.0.82.bazel"),
+    )
+
+    maybe(
+        http_archive,
+        name = "rules_rust_util_import__unicode-xid-0.2.3",
+        sha256 = "957e51f3646910546462e67d5f7599b9e4fb8acdd304b087a6494730f9eebf04",
+        type = "tar.gz",
+        urls = ["https://crates.io/api/v1/crates/unicode-xid/0.2.3/download"],
+        strip_prefix = "unicode-xid-0.2.3",
+        build_file = Label("@rules_rust//util/import/3rdparty/crates:BUILD.unicode-xid-0.2.3.bazel"),
+    )
+
+    maybe(
+        http_archive,
+        name = "rules_rust_util_import__wasi-0.11.0-wasi-snapshot-preview1",
+        sha256 = "9c8d87e72b64a3b4db28d11ce29237c246188f4f51057d65a7eab63b7987e423",
+        type = "tar.gz",
+        urls = ["https://crates.io/api/v1/crates/wasi/0.11.0+wasi-snapshot-preview1/download"],
+        strip_prefix = "wasi-0.11.0+wasi-snapshot-preview1",
+        build_file = Label("@rules_rust//util/import/3rdparty/crates:BUILD.wasi-0.11.0+wasi-snapshot-preview1.bazel"),
+    )
diff --git a/util/import/BUILD.bazel b/util/import/BUILD.bazel
index 7cb0395..898a82f 100644
--- a/util/import/BUILD.bazel
+++ b/util/import/BUILD.bazel
@@ -1,11 +1,12 @@
+load("@rules_cc//cc:defs.bzl", "cc_binary")
 load("//rust:defs.bzl", "rust_library", "rust_proc_macro", "rust_test")
 
 # buildifier: disable=bzl-visibility
-load("//rust/private:transitions.bzl", "with_import_macro_bootstrapping_mode")
+load("//rust/private:transitions.bzl", "alias_with_import_macro_bootstrapping_mode")
 
-with_import_macro_bootstrapping_mode(
+alias_with_import_macro_bootstrapping_mode(
     name = "import_macro",
-    target = "import_macro_impl",
+    actual = ":import_macro_impl",
 )
 
 rust_proc_macro(
@@ -14,9 +15,10 @@
         "import.rs",
     ],
     crate_name = "import",
+    edition = "2018",
     deps = [
         ":import_internal",
-        "//util/import/raze:syn",
+        "//util/import/3rdparty/crates:syn",
     ],
 )
 
@@ -25,12 +27,13 @@
     srcs = [
         "import_internal.rs",
     ],
+    edition = "2018",
     deps = [
-        "//util/import/raze:aho_corasick",
-        "//util/import/raze:lazy_static",
-        "//util/import/raze:proc_macro2",
-        "//util/import/raze:quote",
-        "//util/import/raze:syn",
+        "//util/import/3rdparty/crates:aho-corasick",
+        "//util/import/3rdparty/crates:lazy_static",
+        "//util/import/3rdparty/crates:proc-macro2",
+        "//util/import/3rdparty/crates:quote",
+        "//util/import/3rdparty/crates:syn",
         "//util/label",
     ],
 )
@@ -38,8 +41,9 @@
 rust_test(
     name = "import_internal_test",
     crate = ":import_internal",
+    edition = "2018",
     deps = [
-        "//util/import/raze:quickcheck",
+        "//util/import/3rdparty/crates:quickcheck",
     ],
 )
 
@@ -67,7 +71,7 @@
     },
 )
 
-sh_binary(
+cc_binary(
     name = "fake_import_macro_impl",
-    srcs = ["fake_import_macro_impl.sh"],
+    srcs = ["fake_import_macro_impl.cc"],
 )
diff --git a/util/import/deps.bzl b/util/import/deps.bzl
index be49b06..ffce2b3 100644
--- a/util/import/deps.bzl
+++ b/util/import/deps.bzl
@@ -2,10 +2,10 @@
 The dependencies for running the gen_rust_project binary.
 """
 
-load("//util/import/raze:crates.bzl", "rules_rust_util_import_fetch_remote_crates")
+load("//util/import/3rdparty/crates:defs.bzl", "crate_repositories")
 
 def import_deps():
-    rules_rust_util_import_fetch_remote_crates()
+    crate_repositories()
 
 # For legacy support
 gen_rust_project_dependencies = import_deps
diff --git a/util/import/fake_import_macro_impl.cc b/util/import/fake_import_macro_impl.cc
new file mode 100755
index 0000000..5b0b32a
--- /dev/null
+++ b/util/import/fake_import_macro_impl.cc
@@ -0,0 +1,3 @@
+//! A noop import macro handler.
+
+int main(int argc, char** argv) { return 0; }
diff --git a/util/import/fake_import_macro_impl.sh b/util/import/fake_import_macro_impl.sh
deleted file mode 100755
index 1fa77d8..0000000
--- a/util/import/fake_import_macro_impl.sh
+++ /dev/null
@@ -1,3 +0,0 @@
-#!/bin/sh
-
-# Does nothing.
\ No newline at end of file
diff --git a/util/import/import_internal.rs b/util/import/import_internal.rs
index 1d44fe6..8b6e061 100644
--- a/util/import/import_internal.rs
+++ b/util/import/import_internal.rs
@@ -73,6 +73,43 @@
 }
 
 lazy_static! {
+    // The (unencoded, encoded) pairings here must match those in
+    // //rust/private/utils.bzl exactly.
+    static ref ENCODINGS: Vec<(&'static str, &'static str)> =
+            vec![
+                    (":", "x"),
+                    ("!", "excl"),
+                    ("%", "prc"),
+                    ("@", "ao"),
+                    ("^", "caret"),
+                    ("`", "bt"),
+                    (" ", "sp"),
+                    ("\"", "dq"),
+                    ("#", "octo"),
+                    ("$", "dllr"),
+                    ("&", "amp"),
+                    ("'", "sq"),
+                    ("(", "lp"),
+                    (")", "rp"),
+                    ("*", "astr"),
+                    ("-", "d"),
+                    ("+", "pl"),
+                    (",", "cm"),
+                    (";", "sm"),
+                    ("<", "la"),
+                    ("=", "eq"),
+                    (">", "ra"),
+                    ("?", "qm"),
+                    ("[", "lbk"),
+                    ("]", "rbk"),
+                    ("{", "lbe"),
+                    ("|", "pp"),
+                    ("}", "rbe"),
+                    ("~", "td"),
+                    ("/", "y"),
+                    (".", "pd"),
+            ];
+
     // Transformations are stored as "(unencoded, encoded)" tuples.
     // Target names can include:
     // !%-@^_` "#$&'()*-+,;<=>?[]{|}~/.
@@ -81,44 +118,11 @@
     //
     // Packages and targets are separated by colons.
     static ref SUBSTITUTIONS: (Vec<String>, Vec<String>) =
-        iter::once(("_quote".to_string(), "_quotequote_".to_string()))
-        .chain(
-            vec![
-                    (":", "colon"),
-                    ("!", "bang"),
-                    ("%", "percent"),
-                    ("@", "at"),
-                    ("^", "caret"),
-                    ("`", "backtick"),
-                    (" ", "space"),
-                    ("\"", "quote"),
-                    ("#", "hash"),
-                    ("$", "dollar"),
-                    ("&", "ampersand"),
-                    ("'", "backslash"),
-                    ("(", "lparen"),
-                    (")", "rparen"),
-                    ("*", "star"),
-                    ("-", "dash"),
-                    ("+", "plus"),
-                    (",", "comma"),
-                    (";", "semicolon"),
-                    ("<", "langle"),
-                    ("=", "equal"),
-                    (">", "rangle"),
-                    ("?", "question"),
-                    ("[", "lbracket"),
-                    ("]", "rbracket"),
-                    ("{", "lbrace"),
-                    ("|", "pipe"),
-                    ("}", "rbrace"),
-                    ("~", "tilde"),
-                    ("/", "slash"),
-                    (".", "dot"),
-            ].into_iter()
+        iter::once(("_z".to_string(), "_zz_".to_string()))
+        .chain(ENCODINGS.iter()
             .flat_map(|pair| {
                 vec![
-                    (format!("_{}_", &pair.1), format!("_quote{}_", &pair.1)),
+                    (format!("_{}_", &pair.1), format!("_z{}_", &pair.1)),
                     (pair.0.to_string(), format!("_{}_", &pair.1)),
                 ].into_iter()
             })
@@ -307,42 +311,42 @@
         let expanded = expand_imports(parse_quote! { "//some_project:utils"; }, &mode)?;
         assert_eq!(
             expanded.to_string(),
-            "extern crate some_project_colon_utils as utils ;"
+            "extern crate some_project_x_utils as utils ;"
         );
 
         // Package and a target, with a no-op alias.
         let expanded = expand_imports(parse_quote! { "//some_project:utils" as utils; }, &mode)?;
         assert_eq!(
             expanded.to_string(),
-            "extern crate some_project_colon_utils as utils ;"
+            "extern crate some_project_x_utils as utils ;"
         );
 
         // Package and a target, with an alias.
         let expanded = expand_imports(parse_quote! { "//some_project:utils" as my_utils; }, &mode)?;
         assert_eq!(
             expanded.to_string(),
-            "extern crate some_project_colon_utils as my_utils ;"
+            "extern crate some_project_x_utils as my_utils ;"
         );
 
         // Package and an implicit target.
         let expanded = expand_imports(parse_quote! { "//some_project/utils"; }, &mode)?;
         assert_eq!(
             expanded.to_string(),
-            "extern crate some_project_slash_utils_colon_utils as utils ;"
+            "extern crate some_project_y_utils_x_utils as utils ;"
         );
 
         // Package and an implicit target, with a no-op alias.
         let expanded = expand_imports(parse_quote! { "//some_project/utils" as utils; }, &mode)?;
         assert_eq!(
             expanded.to_string(),
-            "extern crate some_project_slash_utils_colon_utils as utils ;"
+            "extern crate some_project_y_utils_x_utils as utils ;"
         );
 
         // Package and an implicit target, with an alias.
         let expanded = expand_imports(parse_quote! { "//some_project/utils" as my_utils; }, &mode)?;
         assert_eq!(
             expanded.to_string(),
-            "extern crate some_project_slash_utils_colon_utils as my_utils ;"
+            "extern crate some_project_y_utils_x_utils as my_utils ;"
         );
 
         // A third-party target.
@@ -371,14 +375,14 @@
         )?;
         assert_eq!(
             expanded.to_string(),
-            "extern crate some_project_colon_utils as utils ; extern crate serde ;"
+            "extern crate some_project_x_utils as utils ; extern crate serde ;"
         );
 
         // Problematic target name.
         let expanded = expand_imports(parse_quote! { "//some_project:thing-types"; }, &mode)?;
         assert_eq!(
             expanded.to_string(),
-            "extern crate some_project_colon_thing_dash_types as thing_dash_types ;"
+            "extern crate some_project_x_thing_d_types as thing_d_types ;"
         );
 
         // Problematic target name with alias.
@@ -388,14 +392,14 @@
         )?;
         assert_eq!(
             expanded.to_string(),
-            "extern crate some_project_colon_thing_dash_types as types ;"
+            "extern crate some_project_x_thing_d_types as types ;"
         );
 
         // Problematic package name.
         let expanded = expand_imports(parse_quote! { "//some_project-prototype:utils"; }, &mode)?;
         assert_eq!(
             expanded.to_string(),
-            "extern crate some_project_dash_prototype_colon_utils as utils ;"
+            "extern crate some_project_d_prototype_x_utils as utils ;"
         );
 
         // Problematic package and target names.
@@ -405,7 +409,7 @@
         )?;
         assert_eq!(
             expanded.to_string(),
-            "extern crate some_project_dash_prototype_colon_thing_dash_types as thing_dash_types ;"
+            "extern crate some_project_d_prototype_x_thing_d_types as thing_d_types ;"
         );
 
         Ok(())
@@ -522,17 +526,41 @@
     }
 
     #[test]
+    fn test_substitutions_concatenate() -> Result<()> {
+        // Every combination of orig + orig, orig + encoded, encoded + orig, and
+        // encoded + encoded round trips the encoding successfully.
+        for s in SUBSTITUTIONS.0.iter().chain(SUBSTITUTIONS.1.iter()) {
+            for t in SUBSTITUTIONS.0.iter().chain(SUBSTITUTIONS.1.iter()) {
+                let concatenated = format!("{}{}", s, t);
+                assert_eq!(&decode(&encode(&concatenated)), &concatenated);
+            }
+        }
+
+        Ok(())
+    }
+
+    #[test]
     fn test_encode() -> Result<()> {
-        assert_eq!(encode("some_project:utils"), "some_project_colon_utils");
-        assert_eq!(&encode("_quotedot_"), "_quotequote_dot_");
+        assert_eq!(encode("some_project:utils"), "some_project_x_utils");
+        assert_eq!(&encode("_zpd_"), "_zz_pd_");
+
+        // All the encodings should be what we expect.
+        for (orig, encoded) in SUBSTITUTIONS.0.iter().zip(SUBSTITUTIONS.1.iter()) {
+            assert_eq!(&encode(orig), encoded);
+        }
 
         Ok(())
     }
 
     #[test]
     fn test_decode() -> Result<()> {
-        assert_eq!(decode("some_project_colon_utils"), "some_project:utils");
-        assert_eq!(decode("_quotequote_dot_"), "_quotedot_");
+        assert_eq!(decode("some_project_x_utils"), "some_project:utils");
+        assert_eq!(decode("_zz_pd_"), "_zpd_");
+
+        // All the decodings should be what we expect.
+        for (orig, encoded) in SUBSTITUTIONS.0.iter().zip(SUBSTITUTIONS.1.iter()) {
+            assert_eq!(&decode(encoded), orig);
+        }
 
         Ok(())
     }
diff --git a/util/import/raze/BUILD.bazel b/util/import/raze/BUILD.bazel
deleted file mode 100644
index 2f14d0e..0000000
--- a/util/import/raze/BUILD.bazel
+++ /dev/null
@@ -1,75 +0,0 @@
-"""
-@generated
-cargo-raze generated Bazel file.
-
-DO NOT EDIT! Replaced on runs of cargo-raze
-"""
-
-package(default_visibility = ["//visibility:public"])
-
-licenses([
-    "notice",  # See individual crates for specific licenses
-])
-
-# Aliased targets
-alias(
-    name = "aho_corasick",
-    actual = "@rules_rust_util_import__aho_corasick__0_7_15//:aho_corasick",
-    tags = [
-        "cargo-raze",
-        "manual",
-    ],
-)
-
-alias(
-    name = "lazy_static",
-    actual = "@rules_rust_util_import__lazy_static__1_4_0//:lazy_static",
-    tags = [
-        "cargo-raze",
-        "manual",
-    ],
-)
-
-alias(
-    name = "proc_macro2",
-    actual = "@rules_rust_util_import__proc_macro2__1_0_33//:proc_macro2",
-    tags = [
-        "cargo-raze",
-        "manual",
-    ],
-)
-
-alias(
-    name = "quickcheck",
-    actual = "@rules_rust_util_import__quickcheck__1_0_3//:quickcheck",
-    tags = [
-        "cargo-raze",
-        "manual",
-    ],
-)
-
-alias(
-    name = "quote",
-    actual = "@rules_rust_util_import__quote__1_0_10//:quote",
-    tags = [
-        "cargo-raze",
-        "manual",
-    ],
-)
-
-alias(
-    name = "syn",
-    actual = "@rules_rust_util_import__syn__1_0_82//:syn",
-    tags = [
-        "cargo-raze",
-        "manual",
-    ],
-)
-
-# Export file for Stardoc support
-exports_files(
-    [
-        "crates.bzl",
-    ],
-    visibility = ["//visibility:public"],
-)
diff --git a/util/import/raze/Cargo.toml b/util/import/raze/Cargo.toml
deleted file mode 100644
index b942944..0000000
--- a/util/import/raze/Cargo.toml
+++ /dev/null
@@ -1,25 +0,0 @@
-[package]
-name = "compile_with_bazel"
-version = "0.0.0"
-
-# Mandatory (or Cargo tooling is unhappy)
-[lib]
-path = "fake_lib.rs"
-
-[dependencies]
-aho-corasick = "=0.7.15"
-lazy_static = "=1.4.0"
-proc-macro2 = "=1.0.33"
-quote = "=1.0.10"
-syn = "=1.0.82"
-
-[dev-dependencies]
-quickcheck = "=1.0.3"
-
-[package.metadata.raze]
-genmode = "Remote"
-workspace_path = "//util/import/raze"
-gen_workspace_prefix = "rules_rust_util_import"
-rust_rules_workspace_name = "rules_rust"
-package_aliases_dir = "."
-default_gen_buildrs = true
\ No newline at end of file
diff --git a/util/import/raze/crates.bzl b/util/import/raze/crates.bzl
deleted file mode 100644
index 7da9f98..0000000
--- a/util/import/raze/crates.bzl
+++ /dev/null
@@ -1,192 +0,0 @@
-"""
-@generated
-cargo-raze generated Bazel file.
-
-DO NOT EDIT! Replaced on runs of cargo-raze
-"""
-
-load("@bazel_tools//tools/build_defs/repo:git.bzl", "new_git_repository")  # buildifier: disable=load
-load("@bazel_tools//tools/build_defs/repo:http.bzl", "http_archive")  # buildifier: disable=load
-load("@bazel_tools//tools/build_defs/repo:utils.bzl", "maybe")  # buildifier: disable=load
-
-def rules_rust_util_import_fetch_remote_crates():
-    """This function defines a collection of repos and should be called in a WORKSPACE file"""
-    maybe(
-        http_archive,
-        name = "rules_rust_util_import__aho_corasick__0_7_15",
-        url = "https://crates.io/api/v1/crates/aho-corasick/0.7.15/download",
-        type = "tar.gz",
-        sha256 = "7404febffaa47dac81aa44dba71523c9d069b1bdc50a77db41195149e17f68e5",
-        strip_prefix = "aho-corasick-0.7.15",
-        build_file = Label("//util/import/raze/remote:BUILD.aho-corasick-0.7.15.bazel"),
-    )
-
-    maybe(
-        http_archive,
-        name = "rules_rust_util_import__cfg_if__1_0_0",
-        url = "https://crates.io/api/v1/crates/cfg-if/1.0.0/download",
-        type = "tar.gz",
-        sha256 = "baf1de4339761588bc0619e3cbc0120ee582ebb74b53b4efbf79117bd2da40fd",
-        strip_prefix = "cfg-if-1.0.0",
-        build_file = Label("//util/import/raze/remote:BUILD.cfg-if-1.0.0.bazel"),
-    )
-
-    maybe(
-        http_archive,
-        name = "rules_rust_util_import__env_logger__0_8_4",
-        url = "https://crates.io/api/v1/crates/env_logger/0.8.4/download",
-        type = "tar.gz",
-        sha256 = "a19187fea3ac7e84da7dacf48de0c45d63c6a76f9490dae389aead16c243fce3",
-        strip_prefix = "env_logger-0.8.4",
-        build_file = Label("//util/import/raze/remote:BUILD.env_logger-0.8.4.bazel"),
-    )
-
-    maybe(
-        http_archive,
-        name = "rules_rust_util_import__getrandom__0_2_3",
-        url = "https://crates.io/api/v1/crates/getrandom/0.2.3/download",
-        type = "tar.gz",
-        sha256 = "7fcd999463524c52659517fe2cea98493cfe485d10565e7b0fb07dbba7ad2753",
-        strip_prefix = "getrandom-0.2.3",
-        build_file = Label("//util/import/raze/remote:BUILD.getrandom-0.2.3.bazel"),
-    )
-
-    maybe(
-        http_archive,
-        name = "rules_rust_util_import__lazy_static__1_4_0",
-        url = "https://crates.io/api/v1/crates/lazy_static/1.4.0/download",
-        type = "tar.gz",
-        sha256 = "e2abad23fbc42b3700f2f279844dc832adb2b2eb069b2df918f455c4e18cc646",
-        strip_prefix = "lazy_static-1.4.0",
-        build_file = Label("//util/import/raze/remote:BUILD.lazy_static-1.4.0.bazel"),
-    )
-
-    maybe(
-        http_archive,
-        name = "rules_rust_util_import__libc__0_2_112",
-        url = "https://crates.io/api/v1/crates/libc/0.2.112/download",
-        type = "tar.gz",
-        sha256 = "1b03d17f364a3a042d5e5d46b053bbbf82c92c9430c592dd4c064dc6ee997125",
-        strip_prefix = "libc-0.2.112",
-        build_file = Label("//util/import/raze/remote:BUILD.libc-0.2.112.bazel"),
-    )
-
-    maybe(
-        http_archive,
-        name = "rules_rust_util_import__log__0_4_14",
-        url = "https://crates.io/api/v1/crates/log/0.4.14/download",
-        type = "tar.gz",
-        sha256 = "51b9bbe6c47d51fc3e1a9b945965946b4c44142ab8792c50835a980d362c2710",
-        strip_prefix = "log-0.4.14",
-        build_file = Label("//util/import/raze/remote:BUILD.log-0.4.14.bazel"),
-    )
-
-    maybe(
-        http_archive,
-        name = "rules_rust_util_import__memchr__2_4_1",
-        url = "https://crates.io/api/v1/crates/memchr/2.4.1/download",
-        type = "tar.gz",
-        sha256 = "308cc39be01b73d0d18f82a0e7b2a3df85245f84af96fdddc5d202d27e47b86a",
-        strip_prefix = "memchr-2.4.1",
-        build_file = Label("//util/import/raze/remote:BUILD.memchr-2.4.1.bazel"),
-    )
-
-    maybe(
-        http_archive,
-        name = "rules_rust_util_import__proc_macro2__1_0_33",
-        url = "https://crates.io/api/v1/crates/proc-macro2/1.0.33/download",
-        type = "tar.gz",
-        sha256 = "fb37d2df5df740e582f28f8560cf425f52bb267d872fe58358eadb554909f07a",
-        strip_prefix = "proc-macro2-1.0.33",
-        build_file = Label("//util/import/raze/remote:BUILD.proc-macro2-1.0.33.bazel"),
-    )
-
-    maybe(
-        http_archive,
-        name = "rules_rust_util_import__quickcheck__1_0_3",
-        url = "https://crates.io/api/v1/crates/quickcheck/1.0.3/download",
-        type = "tar.gz",
-        sha256 = "588f6378e4dd99458b60ec275b4477add41ce4fa9f64dcba6f15adccb19b50d6",
-        strip_prefix = "quickcheck-1.0.3",
-        build_file = Label("//util/import/raze/remote:BUILD.quickcheck-1.0.3.bazel"),
-    )
-
-    maybe(
-        http_archive,
-        name = "rules_rust_util_import__quote__1_0_10",
-        url = "https://crates.io/api/v1/crates/quote/1.0.10/download",
-        type = "tar.gz",
-        sha256 = "38bc8cc6a5f2e3655e0899c1b848643b2562f853f114bfec7be120678e3ace05",
-        strip_prefix = "quote-1.0.10",
-        build_file = Label("//util/import/raze/remote:BUILD.quote-1.0.10.bazel"),
-    )
-
-    maybe(
-        http_archive,
-        name = "rules_rust_util_import__rand__0_8_4",
-        url = "https://crates.io/api/v1/crates/rand/0.8.4/download",
-        type = "tar.gz",
-        sha256 = "2e7573632e6454cf6b99d7aac4ccca54be06da05aca2ef7423d22d27d4d4bcd8",
-        strip_prefix = "rand-0.8.4",
-        build_file = Label("//util/import/raze/remote:BUILD.rand-0.8.4.bazel"),
-    )
-
-    maybe(
-        http_archive,
-        name = "rules_rust_util_import__rand_core__0_6_3",
-        url = "https://crates.io/api/v1/crates/rand_core/0.6.3/download",
-        type = "tar.gz",
-        sha256 = "d34f1408f55294453790c48b2f1ebbb1c5b4b7563eb1f418bcfcfdbb06ebb4e7",
-        strip_prefix = "rand_core-0.6.3",
-        build_file = Label("//util/import/raze/remote:BUILD.rand_core-0.6.3.bazel"),
-    )
-
-    maybe(
-        http_archive,
-        name = "rules_rust_util_import__regex__1_4_6",
-        url = "https://crates.io/api/v1/crates/regex/1.4.6/download",
-        type = "tar.gz",
-        sha256 = "2a26af418b574bd56588335b3a3659a65725d4e636eb1016c2f9e3b38c7cc759",
-        strip_prefix = "regex-1.4.6",
-        build_file = Label("//util/import/raze/remote:BUILD.regex-1.4.6.bazel"),
-    )
-
-    maybe(
-        http_archive,
-        name = "rules_rust_util_import__regex_syntax__0_6_25",
-        url = "https://crates.io/api/v1/crates/regex-syntax/0.6.25/download",
-        type = "tar.gz",
-        sha256 = "f497285884f3fcff424ffc933e56d7cbca511def0c9831a7f9b5f6153e3cc89b",
-        strip_prefix = "regex-syntax-0.6.25",
-        build_file = Label("//util/import/raze/remote:BUILD.regex-syntax-0.6.25.bazel"),
-    )
-
-    maybe(
-        http_archive,
-        name = "rules_rust_util_import__syn__1_0_82",
-        url = "https://crates.io/api/v1/crates/syn/1.0.82/download",
-        type = "tar.gz",
-        sha256 = "8daf5dd0bb60cbd4137b1b587d2fc0ae729bc07cf01cd70b36a1ed5ade3b9d59",
-        strip_prefix = "syn-1.0.82",
-        build_file = Label("//util/import/raze/remote:BUILD.syn-1.0.82.bazel"),
-    )
-
-    maybe(
-        http_archive,
-        name = "rules_rust_util_import__unicode_xid__0_2_2",
-        url = "https://crates.io/api/v1/crates/unicode-xid/0.2.2/download",
-        type = "tar.gz",
-        sha256 = "8ccb82d61f80a663efe1f787a51b16b5a51e3314d6ac365b08639f52387b33f3",
-        strip_prefix = "unicode-xid-0.2.2",
-        build_file = Label("//util/import/raze/remote:BUILD.unicode-xid-0.2.2.bazel"),
-    )
-
-    maybe(
-        http_archive,
-        name = "rules_rust_util_import__wasi__0_10_2_wasi_snapshot_preview1",
-        url = "https://crates.io/api/v1/crates/wasi/0.10.2+wasi-snapshot-preview1/download",
-        type = "tar.gz",
-        sha256 = "fd6fbd9a79829dd1ad0cc20627bf1ed606756a7f77edff7b66b7064f9cb327c6",
-        strip_prefix = "wasi-0.10.2+wasi-snapshot-preview1",
-        build_file = Label("//util/import/raze/remote:BUILD.wasi-0.10.2+wasi-snapshot-preview1.bazel"),
-    )
diff --git a/util/import/raze/remote/BUILD.aho-corasick-0.7.15.bazel b/util/import/raze/remote/BUILD.aho-corasick-0.7.15.bazel
deleted file mode 100644
index 4fc8c0d..0000000
--- a/util/import/raze/remote/BUILD.aho-corasick-0.7.15.bazel
+++ /dev/null
@@ -1,57 +0,0 @@
-"""
-@generated
-cargo-raze crate build file.
-
-DO NOT EDIT! Replaced on runs of cargo-raze
-"""
-
-# buildifier: disable=load
-load("@bazel_skylib//lib:selects.bzl", "selects")
-
-# buildifier: disable=load
-load(
-    "@rules_rust//rust:defs.bzl",
-    "rust_binary",
-    "rust_library",
-    "rust_proc_macro",
-    "rust_test",
-)
-
-package(default_visibility = [
-    # Public for visibility by "@raze__crate__version//" targets.
-    #
-    # Prefer access through "//util/import/raze", which limits external
-    # visibility to explicit Cargo.toml dependencies.
-    "//visibility:public",
-])
-
-licenses([
-    "unencumbered",  # Unlicense from expression "Unlicense OR MIT"
-])
-
-# Generated Targets
-
-rust_library(
-    name = "aho_corasick",
-    srcs = glob(["**/*.rs"]),
-    crate_features = [
-        "default",
-        "std",
-    ],
-    crate_root = "src/lib.rs",
-    data = [],
-    edition = "2015",
-    rustc_flags = [
-        "--cap-lints=allow",
-    ],
-    tags = [
-        "cargo-raze",
-        "crate-name=aho_corasick",
-        "manual",
-    ],
-    version = "0.7.15",
-    # buildifier: leave-alone
-    deps = [
-        "@rules_rust_util_import__memchr__2_4_1//:memchr",
-    ],
-)
diff --git a/util/import/raze/remote/BUILD.bazel b/util/import/raze/remote/BUILD.bazel
deleted file mode 100644
index e69de29..0000000
--- a/util/import/raze/remote/BUILD.bazel
+++ /dev/null
diff --git a/util/import/raze/remote/BUILD.cfg-if-1.0.0.bazel b/util/import/raze/remote/BUILD.cfg-if-1.0.0.bazel
deleted file mode 100644
index 1a5adcf..0000000
--- a/util/import/raze/remote/BUILD.cfg-if-1.0.0.bazel
+++ /dev/null
@@ -1,56 +0,0 @@
-"""
-@generated
-cargo-raze crate build file.
-
-DO NOT EDIT! Replaced on runs of cargo-raze
-"""
-
-# buildifier: disable=load
-load("@bazel_skylib//lib:selects.bzl", "selects")
-
-# buildifier: disable=load
-load(
-    "@rules_rust//rust:defs.bzl",
-    "rust_binary",
-    "rust_library",
-    "rust_proc_macro",
-    "rust_test",
-)
-
-package(default_visibility = [
-    # Public for visibility by "@raze__crate__version//" targets.
-    #
-    # Prefer access through "//util/import/raze", which limits external
-    # visibility to explicit Cargo.toml dependencies.
-    "//visibility:public",
-])
-
-licenses([
-    "notice",  # MIT from expression "MIT OR Apache-2.0"
-])
-
-# Generated Targets
-
-rust_library(
-    name = "cfg_if",
-    srcs = glob(["**/*.rs"]),
-    crate_features = [
-    ],
-    crate_root = "src/lib.rs",
-    data = [],
-    edition = "2018",
-    rustc_flags = [
-        "--cap-lints=allow",
-    ],
-    tags = [
-        "cargo-raze",
-        "crate-name=cfg-if",
-        "manual",
-    ],
-    version = "1.0.0",
-    # buildifier: leave-alone
-    deps = [
-    ],
-)
-
-# Unsupported target "xcrate" with type "test" omitted
diff --git a/util/import/raze/remote/BUILD.env_logger-0.8.4.bazel b/util/import/raze/remote/BUILD.env_logger-0.8.4.bazel
deleted file mode 100644
index a04b02c..0000000
--- a/util/import/raze/remote/BUILD.env_logger-0.8.4.bazel
+++ /dev/null
@@ -1,65 +0,0 @@
-"""
-@generated
-cargo-raze crate build file.
-
-DO NOT EDIT! Replaced on runs of cargo-raze
-"""
-
-# buildifier: disable=load
-load("@bazel_skylib//lib:selects.bzl", "selects")
-
-# buildifier: disable=load
-load(
-    "@rules_rust//rust:defs.bzl",
-    "rust_binary",
-    "rust_library",
-    "rust_proc_macro",
-    "rust_test",
-)
-
-package(default_visibility = [
-    # Public for visibility by "@raze__crate__version//" targets.
-    #
-    # Prefer access through "//util/import/raze", which limits external
-    # visibility to explicit Cargo.toml dependencies.
-    "//visibility:public",
-])
-
-licenses([
-    "notice",  # MIT from expression "MIT OR Apache-2.0"
-])
-
-# Generated Targets
-
-rust_library(
-    name = "env_logger",
-    srcs = glob(["**/*.rs"]),
-    crate_features = [
-        "regex",
-    ],
-    crate_root = "src/lib.rs",
-    data = [],
-    edition = "2018",
-    rustc_flags = [
-        "--cap-lints=allow",
-    ],
-    tags = [
-        "cargo-raze",
-        "crate-name=env_logger",
-        "manual",
-    ],
-    version = "0.8.4",
-    # buildifier: leave-alone
-    deps = [
-        "@rules_rust_util_import__log__0_4_14//:log",
-        "@rules_rust_util_import__regex__1_4_6//:regex",
-    ],
-)
-
-# Unsupported target "init-twice-retains-filter" with type "test" omitted
-
-# Unsupported target "log-in-log" with type "test" omitted
-
-# Unsupported target "log_tls_dtors" with type "test" omitted
-
-# Unsupported target "regexp_filter" with type "test" omitted
diff --git a/util/import/raze/remote/BUILD.getrandom-0.2.3.bazel b/util/import/raze/remote/BUILD.getrandom-0.2.3.bazel
deleted file mode 100644
index 8333757..0000000
--- a/util/import/raze/remote/BUILD.getrandom-0.2.3.bazel
+++ /dev/null
@@ -1,96 +0,0 @@
-"""
-@generated
-cargo-raze crate build file.
-
-DO NOT EDIT! Replaced on runs of cargo-raze
-"""
-
-# buildifier: disable=load
-load("@bazel_skylib//lib:selects.bzl", "selects")
-
-# buildifier: disable=load
-load(
-    "@rules_rust//rust:defs.bzl",
-    "rust_binary",
-    "rust_library",
-    "rust_proc_macro",
-    "rust_test",
-)
-
-package(default_visibility = [
-    # Public for visibility by "@raze__crate__version//" targets.
-    #
-    # Prefer access through "//util/import/raze", which limits external
-    # visibility to explicit Cargo.toml dependencies.
-    "//visibility:public",
-])
-
-licenses([
-    "notice",  # MIT from expression "MIT OR Apache-2.0"
-])
-
-# Generated Targets
-
-# Unsupported target "mod" with type "bench" omitted
-
-rust_library(
-    name = "getrandom",
-    srcs = glob(["**/*.rs"]),
-    aliases = {
-    },
-    crate_features = [
-    ],
-    crate_root = "src/lib.rs",
-    data = [],
-    edition = "2018",
-    rustc_flags = [
-        "--cap-lints=allow",
-    ],
-    tags = [
-        "cargo-raze",
-        "crate-name=getrandom",
-        "manual",
-    ],
-    version = "0.2.3",
-    # buildifier: leave-alone
-    deps = [
-        "@rules_rust_util_import__cfg_if__1_0_0//:cfg_if",
-    ] + selects.with_or({
-        # cfg(target_os = "wasi")
-        (
-            "@rules_rust//rust/platform:wasm32-wasi",
-        ): [
-            "@rules_rust_util_import__wasi__0_10_2_wasi_snapshot_preview1//:wasi",
-        ],
-        "//conditions:default": [],
-    }) + selects.with_or({
-        # cfg(unix)
-        (
-            "@rules_rust//rust/platform:i686-apple-darwin",
-            "@rules_rust//rust/platform:i686-unknown-linux-gnu",
-            "@rules_rust//rust/platform:x86_64-apple-darwin",
-            "@rules_rust//rust/platform:x86_64-unknown-linux-gnu",
-            "@rules_rust//rust/platform:aarch64-apple-darwin",
-            "@rules_rust//rust/platform:aarch64-apple-ios",
-            "@rules_rust//rust/platform:aarch64-linux-android",
-            "@rules_rust//rust/platform:aarch64-unknown-linux-gnu",
-            "@rules_rust//rust/platform:arm-unknown-linux-gnueabi",
-            "@rules_rust//rust/platform:i686-linux-android",
-            "@rules_rust//rust/platform:i686-unknown-freebsd",
-            "@rules_rust//rust/platform:powerpc-unknown-linux-gnu",
-            "@rules_rust//rust/platform:s390x-unknown-linux-gnu",
-            "@rules_rust//rust/platform:x86_64-apple-ios",
-            "@rules_rust//rust/platform:x86_64-linux-android",
-            "@rules_rust//rust/platform:x86_64-unknown-freebsd",
-        ): [
-            "@rules_rust_util_import__libc__0_2_112//:libc",
-        ],
-        "//conditions:default": [],
-    }),
-)
-
-# Unsupported target "custom" with type "test" omitted
-
-# Unsupported target "normal" with type "test" omitted
-
-# Unsupported target "rdrand" with type "test" omitted
diff --git a/util/import/raze/remote/BUILD.lazy_static-1.4.0.bazel b/util/import/raze/remote/BUILD.lazy_static-1.4.0.bazel
deleted file mode 100644
index 5542226..0000000
--- a/util/import/raze/remote/BUILD.lazy_static-1.4.0.bazel
+++ /dev/null
@@ -1,58 +0,0 @@
-"""
-@generated
-cargo-raze crate build file.
-
-DO NOT EDIT! Replaced on runs of cargo-raze
-"""
-
-# buildifier: disable=load
-load("@bazel_skylib//lib:selects.bzl", "selects")
-
-# buildifier: disable=load
-load(
-    "@rules_rust//rust:defs.bzl",
-    "rust_binary",
-    "rust_library",
-    "rust_proc_macro",
-    "rust_test",
-)
-
-package(default_visibility = [
-    # Public for visibility by "@raze__crate__version//" targets.
-    #
-    # Prefer access through "//util/import/raze", which limits external
-    # visibility to explicit Cargo.toml dependencies.
-    "//visibility:public",
-])
-
-licenses([
-    "notice",  # MIT from expression "MIT OR Apache-2.0"
-])
-
-# Generated Targets
-
-rust_library(
-    name = "lazy_static",
-    srcs = glob(["**/*.rs"]),
-    crate_features = [
-    ],
-    crate_root = "src/lib.rs",
-    data = [],
-    edition = "2015",
-    rustc_flags = [
-        "--cap-lints=allow",
-    ],
-    tags = [
-        "cargo-raze",
-        "crate-name=lazy_static",
-        "manual",
-    ],
-    version = "1.4.0",
-    # buildifier: leave-alone
-    deps = [
-    ],
-)
-
-# Unsupported target "no_std" with type "test" omitted
-
-# Unsupported target "test" with type "test" omitted
diff --git a/util/import/raze/remote/BUILD.libc-0.2.112.bazel b/util/import/raze/remote/BUILD.libc-0.2.112.bazel
deleted file mode 100644
index 2d8a3fe..0000000
--- a/util/import/raze/remote/BUILD.libc-0.2.112.bazel
+++ /dev/null
@@ -1,86 +0,0 @@
-"""
-@generated
-cargo-raze crate build file.
-
-DO NOT EDIT! Replaced on runs of cargo-raze
-"""
-
-# buildifier: disable=load
-load("@bazel_skylib//lib:selects.bzl", "selects")
-
-# buildifier: disable=load
-load(
-    "@rules_rust//rust:defs.bzl",
-    "rust_binary",
-    "rust_library",
-    "rust_proc_macro",
-    "rust_test",
-)
-
-package(default_visibility = [
-    # Public for visibility by "@raze__crate__version//" targets.
-    #
-    # Prefer access through "//util/import/raze", which limits external
-    # visibility to explicit Cargo.toml dependencies.
-    "//visibility:public",
-])
-
-licenses([
-    "notice",  # MIT from expression "MIT OR Apache-2.0"
-])
-
-# Generated Targets
-# buildifier: disable=out-of-order-load
-# buildifier: disable=load-on-top
-load(
-    "@rules_rust//cargo:cargo_build_script.bzl",
-    "cargo_build_script",
-)
-
-cargo_build_script(
-    name = "libc_build_script",
-    srcs = glob(["**/*.rs"]),
-    build_script_env = {
-    },
-    crate_features = [
-    ],
-    crate_root = "build.rs",
-    data = glob(["**"]),
-    edition = "2015",
-    rustc_flags = [
-        "--cap-lints=allow",
-    ],
-    tags = [
-        "cargo-raze",
-        "manual",
-    ],
-    version = "0.2.112",
-    visibility = ["//visibility:private"],
-    deps = [
-    ],
-)
-
-rust_library(
-    name = "libc",
-    srcs = glob(["**/*.rs"]),
-    crate_features = [
-    ],
-    crate_root = "src/lib.rs",
-    data = [],
-    edition = "2015",
-    rustc_flags = [
-        "--cap-lints=allow",
-    ],
-    tags = [
-        "cargo-raze",
-        "crate-name=libc",
-        "manual",
-    ],
-    version = "0.2.112",
-    # buildifier: leave-alone
-    deps = [
-        ":libc_build_script",
-    ],
-)
-
-# Unsupported target "const_fn" with type "test" omitted
diff --git a/util/import/raze/remote/BUILD.log-0.4.14.bazel b/util/import/raze/remote/BUILD.log-0.4.14.bazel
deleted file mode 100644
index 02efe53..0000000
--- a/util/import/raze/remote/BUILD.log-0.4.14.bazel
+++ /dev/null
@@ -1,93 +0,0 @@
-"""
-@generated
-cargo-raze crate build file.
-
-DO NOT EDIT! Replaced on runs of cargo-raze
-"""
-
-# buildifier: disable=load
-load("@bazel_skylib//lib:selects.bzl", "selects")
-
-# buildifier: disable=load
-load(
-    "@rules_rust//rust:defs.bzl",
-    "rust_binary",
-    "rust_library",
-    "rust_proc_macro",
-    "rust_test",
-)
-
-package(default_visibility = [
-    # Public for visibility by "@raze__crate__version//" targets.
-    #
-    # Prefer access through "//util/import/raze", which limits external
-    # visibility to explicit Cargo.toml dependencies.
-    "//visibility:public",
-])
-
-licenses([
-    "notice",  # MIT from expression "MIT OR Apache-2.0"
-])
-
-# Generated Targets
-# buildifier: disable=out-of-order-load
-# buildifier: disable=load-on-top
-load(
-    "@rules_rust//cargo:cargo_build_script.bzl",
-    "cargo_build_script",
-)
-
-cargo_build_script(
-    name = "log_build_script",
-    srcs = glob(["**/*.rs"]),
-    build_script_env = {
-    },
-    crate_features = [
-        "std",
-    ],
-    crate_root = "build.rs",
-    data = glob(["**"]),
-    edition = "2015",
-    rustc_flags = [
-        "--cap-lints=allow",
-    ],
-    tags = [
-        "cargo-raze",
-        "manual",
-    ],
-    version = "0.4.14",
-    visibility = ["//visibility:private"],
-    deps = [
-    ],
-)
-
-# Unsupported target "value" with type "bench" omitted
-
-rust_library(
-    name = "log",
-    srcs = glob(["**/*.rs"]),
-    crate_features = [
-        "std",
-    ],
-    crate_root = "src/lib.rs",
-    data = [],
-    edition = "2015",
-    rustc_flags = [
-        "--cap-lints=allow",
-    ],
-    tags = [
-        "cargo-raze",
-        "crate-name=log",
-        "manual",
-    ],
-    version = "0.4.14",
-    # buildifier: leave-alone
-    deps = [
-        ":log_build_script",
-        "@rules_rust_util_import__cfg_if__1_0_0//:cfg_if",
-    ],
-)
-
-# Unsupported target "filters" with type "test" omitted
-
-# Unsupported target "macros" with type "test" omitted
diff --git a/util/import/raze/remote/BUILD.memchr-2.4.1.bazel b/util/import/raze/remote/BUILD.memchr-2.4.1.bazel
deleted file mode 100644
index c8e37c3..0000000
--- a/util/import/raze/remote/BUILD.memchr-2.4.1.bazel
+++ /dev/null
@@ -1,90 +0,0 @@
-"""
-@generated
-cargo-raze crate build file.
-
-DO NOT EDIT! Replaced on runs of cargo-raze
-"""
-
-# buildifier: disable=load
-load("@bazel_skylib//lib:selects.bzl", "selects")
-
-# buildifier: disable=load
-load(
-    "@rules_rust//rust:defs.bzl",
-    "rust_binary",
-    "rust_library",
-    "rust_proc_macro",
-    "rust_test",
-)
-
-package(default_visibility = [
-    # Public for visibility by "@raze__crate__version//" targets.
-    #
-    # Prefer access through "//util/import/raze", which limits external
-    # visibility to explicit Cargo.toml dependencies.
-    "//visibility:public",
-])
-
-licenses([
-    "unencumbered",  # Unlicense from expression "Unlicense OR MIT"
-])
-
-# Generated Targets
-# buildifier: disable=out-of-order-load
-# buildifier: disable=load-on-top
-load(
-    "@rules_rust//cargo:cargo_build_script.bzl",
-    "cargo_build_script",
-)
-
-cargo_build_script(
-    name = "memchr_build_script",
-    srcs = glob(["**/*.rs"]),
-    build_script_env = {
-    },
-    crate_features = [
-        "default",
-        "std",
-        "use_std",
-    ],
-    crate_root = "build.rs",
-    data = glob(["**"]),
-    edition = "2018",
-    rustc_flags = [
-        "--cap-lints=allow",
-    ],
-    tags = [
-        "cargo-raze",
-        "manual",
-    ],
-    version = "2.4.1",
-    visibility = ["//visibility:private"],
-    deps = [
-    ],
-)
-
-rust_library(
-    name = "memchr",
-    srcs = glob(["**/*.rs"]),
-    crate_features = [
-        "default",
-        "std",
-        "use_std",
-    ],
-    crate_root = "src/lib.rs",
-    data = [],
-    edition = "2018",
-    rustc_flags = [
-        "--cap-lints=allow",
-    ],
-    tags = [
-        "cargo-raze",
-        "crate-name=memchr",
-        "manual",
-    ],
-    version = "2.4.1",
-    # buildifier: leave-alone
-    deps = [
-        ":memchr_build_script",
-    ],
-)
diff --git a/util/import/raze/remote/BUILD.proc-macro2-1.0.33.bazel b/util/import/raze/remote/BUILD.proc-macro2-1.0.33.bazel
deleted file mode 100644
index 0e479f2..0000000
--- a/util/import/raze/remote/BUILD.proc-macro2-1.0.33.bazel
+++ /dev/null
@@ -1,99 +0,0 @@
-"""
-@generated
-cargo-raze crate build file.
-
-DO NOT EDIT! Replaced on runs of cargo-raze
-"""
-
-# buildifier: disable=load
-load("@bazel_skylib//lib:selects.bzl", "selects")
-
-# buildifier: disable=load
-load(
-    "@rules_rust//rust:defs.bzl",
-    "rust_binary",
-    "rust_library",
-    "rust_proc_macro",
-    "rust_test",
-)
-
-package(default_visibility = [
-    # Public for visibility by "@raze__crate__version//" targets.
-    #
-    # Prefer access through "//util/import/raze", which limits external
-    # visibility to explicit Cargo.toml dependencies.
-    "//visibility:public",
-])
-
-licenses([
-    "notice",  # MIT from expression "MIT OR Apache-2.0"
-])
-
-# Generated Targets
-# buildifier: disable=out-of-order-load
-# buildifier: disable=load-on-top
-load(
-    "@rules_rust//cargo:cargo_build_script.bzl",
-    "cargo_build_script",
-)
-
-cargo_build_script(
-    name = "proc_macro2_build_script",
-    srcs = glob(["**/*.rs"]),
-    build_script_env = {
-    },
-    crate_features = [
-        "default",
-        "proc-macro",
-    ],
-    crate_root = "build.rs",
-    data = glob(["**"]),
-    edition = "2018",
-    rustc_flags = [
-        "--cap-lints=allow",
-    ],
-    tags = [
-        "cargo-raze",
-        "manual",
-    ],
-    version = "1.0.33",
-    visibility = ["//visibility:private"],
-    deps = [
-    ],
-)
-
-rust_library(
-    name = "proc_macro2",
-    srcs = glob(["**/*.rs"]),
-    crate_features = [
-        "default",
-        "proc-macro",
-    ],
-    crate_root = "src/lib.rs",
-    data = [],
-    edition = "2018",
-    rustc_flags = [
-        "--cap-lints=allow",
-    ],
-    tags = [
-        "cargo-raze",
-        "crate-name=proc-macro2",
-        "manual",
-    ],
-    version = "1.0.33",
-    # buildifier: leave-alone
-    deps = [
-        ":proc_macro2_build_script",
-        "@rules_rust_util_import__unicode_xid__0_2_2//:unicode_xid",
-    ],
-)
-
-# Unsupported target "comments" with type "test" omitted
-
-# Unsupported target "features" with type "test" omitted
-
-# Unsupported target "marker" with type "test" omitted
-
-# Unsupported target "test" with type "test" omitted
-
-# Unsupported target "test_fmt" with type "test" omitted
diff --git a/util/import/raze/remote/BUILD.quickcheck-1.0.3.bazel b/util/import/raze/remote/BUILD.quickcheck-1.0.3.bazel
deleted file mode 100644
index a9db2b4..0000000
--- a/util/import/raze/remote/BUILD.quickcheck-1.0.3.bazel
+++ /dev/null
@@ -1,74 +0,0 @@
-"""
-@generated
-cargo-raze crate build file.
-
-DO NOT EDIT! Replaced on runs of cargo-raze
-"""
-
-# buildifier: disable=load
-load("@bazel_skylib//lib:selects.bzl", "selects")
-
-# buildifier: disable=load
-load(
-    "@rules_rust//rust:defs.bzl",
-    "rust_binary",
-    "rust_library",
-    "rust_proc_macro",
-    "rust_test",
-)
-
-package(default_visibility = [
-    # Public for visibility by "@raze__crate__version//" targets.
-    #
-    # Prefer access through "//util/import/raze", which limits external
-    # visibility to explicit Cargo.toml dependencies.
-    "//visibility:public",
-])
-
-licenses([
-    "unencumbered",  # Unlicense from expression "Unlicense OR MIT"
-])
-
-# Generated Targets
-
-# Unsupported target "btree_set_range" with type "example" omitted
-
-# Unsupported target "out_of_bounds" with type "example" omitted
-
-# Unsupported target "reverse" with type "example" omitted
-
-# Unsupported target "reverse_single" with type "example" omitted
-
-# Unsupported target "sieve" with type "example" omitted
-
-# Unsupported target "sort" with type "example" omitted
-
-rust_library(
-    name = "quickcheck",
-    srcs = glob(["**/*.rs"]),
-    crate_features = [
-        "default",
-        "env_logger",
-        "log",
-        "regex",
-        "use_logging",
-    ],
-    crate_root = "src/lib.rs",
-    data = [],
-    edition = "2018",
-    rustc_flags = [
-        "--cap-lints=allow",
-    ],
-    tags = [
-        "cargo-raze",
-        "crate-name=quickcheck",
-        "manual",
-    ],
-    version = "1.0.3",
-    # buildifier: leave-alone
-    deps = [
-        "@rules_rust_util_import__env_logger__0_8_4//:env_logger",
-        "@rules_rust_util_import__log__0_4_14//:log",
-        "@rules_rust_util_import__rand__0_8_4//:rand",
-    ],
-)
diff --git a/util/import/raze/remote/BUILD.quote-1.0.10.bazel b/util/import/raze/remote/BUILD.quote-1.0.10.bazel
deleted file mode 100644
index 040d8cb..0000000
--- a/util/import/raze/remote/BUILD.quote-1.0.10.bazel
+++ /dev/null
@@ -1,63 +0,0 @@
-"""
-@generated
-cargo-raze crate build file.
-
-DO NOT EDIT! Replaced on runs of cargo-raze
-"""
-
-# buildifier: disable=load
-load("@bazel_skylib//lib:selects.bzl", "selects")
-
-# buildifier: disable=load
-load(
-    "@rules_rust//rust:defs.bzl",
-    "rust_binary",
-    "rust_library",
-    "rust_proc_macro",
-    "rust_test",
-)
-
-package(default_visibility = [
-    # Public for visibility by "@raze__crate__version//" targets.
-    #
-    # Prefer access through "//util/import/raze", which limits external
-    # visibility to explicit Cargo.toml dependencies.
-    "//visibility:public",
-])
-
-licenses([
-    "notice",  # MIT from expression "MIT OR Apache-2.0"
-])
-
-# Generated Targets
-
-# Unsupported target "bench" with type "bench" omitted
-
-rust_library(
-    name = "quote",
-    srcs = glob(["**/*.rs"]),
-    crate_features = [
-        "default",
-        "proc-macro",
-    ],
-    crate_root = "src/lib.rs",
-    data = [],
-    edition = "2018",
-    rustc_flags = [
-        "--cap-lints=allow",
-    ],
-    tags = [
-        "cargo-raze",
-        "crate-name=quote",
-        "manual",
-    ],
-    version = "1.0.10",
-    # buildifier: leave-alone
-    deps = [
-        "@rules_rust_util_import__proc_macro2__1_0_33//:proc_macro2",
-    ],
-)
-
-# Unsupported target "compiletest" with type "test" omitted
-
-# Unsupported target "test" with type "test" omitted
diff --git a/util/import/raze/remote/BUILD.rand-0.8.4.bazel b/util/import/raze/remote/BUILD.rand-0.8.4.bazel
deleted file mode 100644
index ebbb9e3..0000000
--- a/util/import/raze/remote/BUILD.rand-0.8.4.bazel
+++ /dev/null
@@ -1,57 +0,0 @@
-"""
-@generated
-cargo-raze crate build file.
-
-DO NOT EDIT! Replaced on runs of cargo-raze
-"""
-
-# buildifier: disable=load
-load("@bazel_skylib//lib:selects.bzl", "selects")
-
-# buildifier: disable=load
-load(
-    "@rules_rust//rust:defs.bzl",
-    "rust_binary",
-    "rust_library",
-    "rust_proc_macro",
-    "rust_test",
-)
-
-package(default_visibility = [
-    # Public for visibility by "@raze__crate__version//" targets.
-    #
-    # Prefer access through "//util/import/raze", which limits external
-    # visibility to explicit Cargo.toml dependencies.
-    "//visibility:public",
-])
-
-licenses([
-    "notice",  # MIT from expression "MIT OR Apache-2.0"
-])
-
-# Generated Targets
-
-rust_library(
-    name = "rand",
-    srcs = glob(["**/*.rs"]),
-    crate_features = [
-        "getrandom",
-        "small_rng",
-    ],
-    crate_root = "src/lib.rs",
-    data = [],
-    edition = "2018",
-    rustc_flags = [
-        "--cap-lints=allow",
-    ],
-    tags = [
-        "cargo-raze",
-        "crate-name=rand",
-        "manual",
-    ],
-    version = "0.8.4",
-    # buildifier: leave-alone
-    deps = [
-        "@rules_rust_util_import__rand_core__0_6_3//:rand_core",
-    ],
-)
diff --git a/util/import/raze/remote/BUILD.rand_core-0.6.3.bazel b/util/import/raze/remote/BUILD.rand_core-0.6.3.bazel
deleted file mode 100644
index 1cc93d3..0000000
--- a/util/import/raze/remote/BUILD.rand_core-0.6.3.bazel
+++ /dev/null
@@ -1,56 +0,0 @@
-"""
-@generated
-cargo-raze crate build file.
-
-DO NOT EDIT! Replaced on runs of cargo-raze
-"""
-
-# buildifier: disable=load
-load("@bazel_skylib//lib:selects.bzl", "selects")
-
-# buildifier: disable=load
-load(
-    "@rules_rust//rust:defs.bzl",
-    "rust_binary",
-    "rust_library",
-    "rust_proc_macro",
-    "rust_test",
-)
-
-package(default_visibility = [
-    # Public for visibility by "@raze__crate__version//" targets.
-    #
-    # Prefer access through "//util/import/raze", which limits external
-    # visibility to explicit Cargo.toml dependencies.
-    "//visibility:public",
-])
-
-licenses([
-    "notice",  # MIT from expression "MIT OR Apache-2.0"
-])
-
-# Generated Targets
-
-rust_library(
-    name = "rand_core",
-    srcs = glob(["**/*.rs"]),
-    crate_features = [
-        "getrandom",
-    ],
-    crate_root = "src/lib.rs",
-    data = [],
-    edition = "2018",
-    rustc_flags = [
-        "--cap-lints=allow",
-    ],
-    tags = [
-        "cargo-raze",
-        "crate-name=rand_core",
-        "manual",
-    ],
-    version = "0.6.3",
-    # buildifier: leave-alone
-    deps = [
-        "@rules_rust_util_import__getrandom__0_2_3//:getrandom",
-    ],
-)
diff --git a/util/import/raze/remote/BUILD.regex-1.4.6.bazel b/util/import/raze/remote/BUILD.regex-1.4.6.bazel
deleted file mode 100644
index 0957c94..0000000
--- a/util/import/raze/remote/BUILD.regex-1.4.6.bazel
+++ /dev/null
@@ -1,95 +0,0 @@
-"""
-@generated
-cargo-raze crate build file.
-
-DO NOT EDIT! Replaced on runs of cargo-raze
-"""
-
-# buildifier: disable=load
-load("@bazel_skylib//lib:selects.bzl", "selects")
-
-# buildifier: disable=load
-load(
-    "@rules_rust//rust:defs.bzl",
-    "rust_binary",
-    "rust_library",
-    "rust_proc_macro",
-    "rust_test",
-)
-
-package(default_visibility = [
-    # Public for visibility by "@raze__crate__version//" targets.
-    #
-    # Prefer access through "//util/import/raze", which limits external
-    # visibility to explicit Cargo.toml dependencies.
-    "//visibility:public",
-])
-
-licenses([
-    "notice",  # MIT from expression "MIT OR Apache-2.0"
-])
-
-# Generated Targets
-
-# Unsupported target "shootout-regex-dna" with type "example" omitted
-
-# Unsupported target "shootout-regex-dna-bytes" with type "example" omitted
-
-# Unsupported target "shootout-regex-dna-cheat" with type "example" omitted
-
-# Unsupported target "shootout-regex-dna-replace" with type "example" omitted
-
-# Unsupported target "shootout-regex-dna-single" with type "example" omitted
-
-# Unsupported target "shootout-regex-dna-single-cheat" with type "example" omitted
-
-rust_library(
-    name = "regex",
-    srcs = glob(["**/*.rs"]),
-    crate_features = [
-        "aho-corasick",
-        "memchr",
-        "perf",
-        "perf-cache",
-        "perf-dfa",
-        "perf-inline",
-        "perf-literal",
-        "std",
-    ],
-    crate_root = "src/lib.rs",
-    data = [],
-    edition = "2015",
-    rustc_flags = [
-        "--cap-lints=allow",
-    ],
-    tags = [
-        "cargo-raze",
-        "crate-name=regex",
-        "manual",
-    ],
-    version = "1.4.6",
-    # buildifier: leave-alone
-    deps = [
-        "@rules_rust_util_import__aho_corasick__0_7_15//:aho_corasick",
-        "@rules_rust_util_import__memchr__2_4_1//:memchr",
-        "@rules_rust_util_import__regex_syntax__0_6_25//:regex_syntax",
-    ],
-)
-
-# Unsupported target "backtrack" with type "test" omitted
-
-# Unsupported target "backtrack-bytes" with type "test" omitted
-
-# Unsupported target "backtrack-utf8bytes" with type "test" omitted
-
-# Unsupported target "crates-regex" with type "test" omitted
-
-# Unsupported target "default" with type "test" omitted
-
-# Unsupported target "default-bytes" with type "test" omitted
-
-# Unsupported target "nfa" with type "test" omitted
-
-# Unsupported target "nfa-bytes" with type "test" omitted
-
-# Unsupported target "nfa-utf8bytes" with type "test" omitted
diff --git a/util/import/raze/remote/BUILD.regex-syntax-0.6.25.bazel b/util/import/raze/remote/BUILD.regex-syntax-0.6.25.bazel
deleted file mode 100644
index 71324e7..0000000
--- a/util/import/raze/remote/BUILD.regex-syntax-0.6.25.bazel
+++ /dev/null
@@ -1,56 +0,0 @@
-"""
-@generated
-cargo-raze crate build file.
-
-DO NOT EDIT! Replaced on runs of cargo-raze
-"""
-
-# buildifier: disable=load
-load("@bazel_skylib//lib:selects.bzl", "selects")
-
-# buildifier: disable=load
-load(
-    "@rules_rust//rust:defs.bzl",
-    "rust_binary",
-    "rust_library",
-    "rust_proc_macro",
-    "rust_test",
-)
-
-package(default_visibility = [
-    # Public for visibility by "@raze__crate__version//" targets.
-    #
-    # Prefer access through "//util/import/raze", which limits external
-    # visibility to explicit Cargo.toml dependencies.
-    "//visibility:public",
-])
-
-licenses([
-    "notice",  # MIT from expression "MIT OR Apache-2.0"
-])
-
-# Generated Targets
-
-# Unsupported target "bench" with type "bench" omitted
-
-rust_library(
-    name = "regex_syntax",
-    srcs = glob(["**/*.rs"]),
-    crate_features = [
-    ],
-    crate_root = "src/lib.rs",
-    data = [],
-    edition = "2018",
-    rustc_flags = [
-        "--cap-lints=allow",
-    ],
-    tags = [
-        "cargo-raze",
-        "crate-name=regex-syntax",
-        "manual",
-    ],
-    version = "0.6.25",
-    # buildifier: leave-alone
-    deps = [
-    ],
-)
diff --git a/util/import/raze/remote/BUILD.syn-1.0.82.bazel b/util/import/raze/remote/BUILD.syn-1.0.82.bazel
deleted file mode 100644
index 8031e00..0000000
--- a/util/import/raze/remote/BUILD.syn-1.0.82.bazel
+++ /dev/null
@@ -1,157 +0,0 @@
-"""
-@generated
-cargo-raze crate build file.
-
-DO NOT EDIT! Replaced on runs of cargo-raze
-"""
-
-# buildifier: disable=load
-load("@bazel_skylib//lib:selects.bzl", "selects")
-
-# buildifier: disable=load
-load(
-    "@rules_rust//rust:defs.bzl",
-    "rust_binary",
-    "rust_library",
-    "rust_proc_macro",
-    "rust_test",
-)
-
-package(default_visibility = [
-    # Public for visibility by "@raze__crate__version//" targets.
-    #
-    # Prefer access through "//util/import/raze", which limits external
-    # visibility to explicit Cargo.toml dependencies.
-    "//visibility:public",
-])
-
-licenses([
-    "notice",  # MIT from expression "MIT OR Apache-2.0"
-])
-
-# Generated Targets
-# buildifier: disable=out-of-order-load
-# buildifier: disable=load-on-top
-load(
-    "@rules_rust//cargo:cargo_build_script.bzl",
-    "cargo_build_script",
-)
-
-cargo_build_script(
-    name = "syn_build_script",
-    srcs = glob(["**/*.rs"]),
-    build_script_env = {
-    },
-    crate_features = [
-        "clone-impls",
-        "default",
-        "derive",
-        "parsing",
-        "printing",
-        "proc-macro",
-        "quote",
-    ],
-    crate_root = "build.rs",
-    data = glob(["**"]),
-    edition = "2018",
-    rustc_flags = [
-        "--cap-lints=allow",
-    ],
-    tags = [
-        "cargo-raze",
-        "manual",
-    ],
-    version = "1.0.82",
-    visibility = ["//visibility:private"],
-    deps = [
-    ],
-)
-
-# Unsupported target "file" with type "bench" omitted
-
-# Unsupported target "rust" with type "bench" omitted
-
-rust_library(
-    name = "syn",
-    srcs = glob(["**/*.rs"]),
-    crate_features = [
-        "clone-impls",
-        "default",
-        "derive",
-        "parsing",
-        "printing",
-        "proc-macro",
-        "quote",
-    ],
-    crate_root = "src/lib.rs",
-    data = [],
-    edition = "2018",
-    rustc_flags = [
-        "--cap-lints=allow",
-    ],
-    tags = [
-        "cargo-raze",
-        "crate-name=syn",
-        "manual",
-    ],
-    version = "1.0.82",
-    # buildifier: leave-alone
-    deps = [
-        ":syn_build_script",
-        "@rules_rust_util_import__proc_macro2__1_0_33//:proc_macro2",
-        "@rules_rust_util_import__quote__1_0_10//:quote",
-        "@rules_rust_util_import__unicode_xid__0_2_2//:unicode_xid",
-    ],
-)
-
-# Unsupported target "test_asyncness" with type "test" omitted
-
-# Unsupported target "test_attribute" with type "test" omitted
-
-# Unsupported target "test_derive_input" with type "test" omitted
-
-# Unsupported target "test_expr" with type "test" omitted
-
-# Unsupported target "test_generics" with type "test" omitted
-
-# Unsupported target "test_grouping" with type "test" omitted
-
-# Unsupported target "test_ident" with type "test" omitted
-
-# Unsupported target "test_item" with type "test" omitted
-
-# Unsupported target "test_iterators" with type "test" omitted
-
-# Unsupported target "test_lit" with type "test" omitted
-
-# Unsupported target "test_meta" with type "test" omitted
-
-# Unsupported target "test_parse_buffer" with type "test" omitted
-
-# Unsupported target "test_parse_stream" with type "test" omitted
-
-# Unsupported target "test_pat" with type "test" omitted
-
-# Unsupported target "test_path" with type "test" omitted
-
-# Unsupported target "test_precedence" with type "test" omitted
-
-# Unsupported target "test_receiver" with type "test" omitted
-
-# Unsupported target "test_round_trip" with type "test" omitted
-
-# Unsupported target "test_shebang" with type "test" omitted
-
-# Unsupported target "test_should_parse" with type "test" omitted
-
-# Unsupported target "test_size" with type "test" omitted
-
-# Unsupported target "test_stmt" with type "test" omitted
-
-# Unsupported target "test_token_trees" with type "test" omitted
-
-# Unsupported target "test_ty" with type "test" omitted
-
-# Unsupported target "test_visibility" with type "test" omitted
-
-# Unsupported target "zzz_stable" with type "test" omitted
diff --git a/util/import/raze/remote/BUILD.unicode-xid-0.2.2.bazel b/util/import/raze/remote/BUILD.unicode-xid-0.2.2.bazel
deleted file mode 100644
index a62237c..0000000
--- a/util/import/raze/remote/BUILD.unicode-xid-0.2.2.bazel
+++ /dev/null
@@ -1,59 +0,0 @@
-"""
-@generated
-cargo-raze crate build file.
-
-DO NOT EDIT! Replaced on runs of cargo-raze
-"""
-
-# buildifier: disable=load
-load("@bazel_skylib//lib:selects.bzl", "selects")
-
-# buildifier: disable=load
-load(
-    "@rules_rust//rust:defs.bzl",
-    "rust_binary",
-    "rust_library",
-    "rust_proc_macro",
-    "rust_test",
-)
-
-package(default_visibility = [
-    # Public for visibility by "@raze__crate__version//" targets.
-    #
-    # Prefer access through "//util/import/raze", which limits external
-    # visibility to explicit Cargo.toml dependencies.
-    "//visibility:public",
-])
-
-licenses([
-    "notice",  # MIT from expression "MIT OR Apache-2.0"
-])
-
-# Generated Targets
-
-# Unsupported target "xid" with type "bench" omitted
-
-rust_library(
-    name = "unicode_xid",
-    srcs = glob(["**/*.rs"]),
-    crate_features = [
-        "default",
-    ],
-    crate_root = "src/lib.rs",
-    data = [],
-    edition = "2015",
-    rustc_flags = [
-        "--cap-lints=allow",
-    ],
-    tags = [
-        "cargo-raze",
-        "crate-name=unicode-xid",
-        "manual",
-    ],
-    version = "0.2.2",
-    # buildifier: leave-alone
-    deps = [
-    ],
-)
-
-# Unsupported target "exhaustive_tests" with type "test" omitted
diff --git a/util/import/raze/remote/BUILD.wasi-0.10.2+wasi-snapshot-preview1.bazel b/util/import/raze/remote/BUILD.wasi-0.10.2+wasi-snapshot-preview1.bazel
deleted file mode 100644
index f4229fe..0000000
--- a/util/import/raze/remote/BUILD.wasi-0.10.2+wasi-snapshot-preview1.bazel
+++ /dev/null
@@ -1,56 +0,0 @@
-"""
-@generated
-cargo-raze crate build file.
-
-DO NOT EDIT! Replaced on runs of cargo-raze
-"""
-
-# buildifier: disable=load
-load("@bazel_skylib//lib:selects.bzl", "selects")
-
-# buildifier: disable=load
-load(
-    "@rules_rust//rust:defs.bzl",
-    "rust_binary",
-    "rust_library",
-    "rust_proc_macro",
-    "rust_test",
-)
-
-package(default_visibility = [
-    # Public for visibility by "@raze__crate__version//" targets.
-    #
-    # Prefer access through "//util/import/raze", which limits external
-    # visibility to explicit Cargo.toml dependencies.
-    "//visibility:public",
-])
-
-licenses([
-    "notice",  # Apache-2.0 from expression "Apache-2.0 OR (Apache-2.0 OR MIT)"
-])
-
-# Generated Targets
-
-rust_library(
-    name = "wasi",
-    srcs = glob(["**/*.rs"]),
-    crate_features = [
-        "default",
-        "std",
-    ],
-    crate_root = "src/lib.rs",
-    data = [],
-    edition = "2018",
-    rustc_flags = [
-        "--cap-lints=allow",
-    ],
-    tags = [
-        "cargo-raze",
-        "crate-name=wasi",
-        "manual",
-    ],
-    version = "0.10.2+wasi-snapshot-preview1",
-    # buildifier: leave-alone
-    deps = [
-    ],
-)
diff --git a/util/process_wrapper/BUILD.bazel b/util/process_wrapper/BUILD.bazel
index c26d9a6..c5276dd 100644
--- a/util/process_wrapper/BUILD.bazel
+++ b/util/process_wrapper/BUILD.bazel
@@ -1,45 +1,20 @@
-load("@rules_cc//cc:defs.bzl", "cc_binary")
-load("//rust:defs.bzl", "rust_binary", "rust_test")
+load("//rust:defs.bzl", "rust_test")
 
 # buildifier: disable=bzl-visibility
-load("//rust/private:transitions.bzl", "without_process_wrapper")
+load("//rust/private:rust.bzl", "rust_binary_without_process_wrapper")
 
-alias(
+rust_binary_without_process_wrapper(
     name = "process_wrapper",
-    actual = select({
-        # This will never get used, it's only here to break the circular dependency to allow building process_wrapper
-        ":use_fake_process_wrapper": ":process_wrapper_fake",
-        "//conditions:default": ":process_wrapper_impl",
-    }),
-    visibility = ["//visibility:public"],
-)
-
-cc_binary(
-    name = "process_wrapper_fake",
-    srcs = ["fake.cc"],
-)
-
-config_setting(
-    name = "use_fake_process_wrapper",
-    flag_values = {
-        "//rust/settings:use_process_wrapper": "False",
-    },
-)
-
-# Changing the name of this rule requires a corresponding
-# change in //rust/private/rustc.bzl:925
-without_process_wrapper(
-    name = "process_wrapper_impl",
-    target = ":process_wrapper_bin",
-    visibility = ["//visibility:public"],
-)
-
-rust_binary(
-    name = "process_wrapper_bin",
     srcs = glob(["*.rs"]),
+    edition = "2018",
+    visibility = ["//visibility:public"],
+    deps = [
+        "@rules_rust_tinyjson//:tinyjson",
+    ],
 )
 
 rust_test(
     name = "process_wrapper_test",
-    crate = ":process_wrapper_bin",
+    crate = ":process_wrapper",
+    edition = "2018",
 )
diff --git a/util/process_wrapper/BUILD.tinyjson.bazel b/util/process_wrapper/BUILD.tinyjson.bazel
new file mode 100644
index 0000000..31f9da2
--- /dev/null
+++ b/util/process_wrapper/BUILD.tinyjson.bazel
@@ -0,0 +1,9 @@
+# buildifier: disable=bzl-visibility
+load("@rules_rust//rust/private:rust.bzl", "rust_library_without_process_wrapper")
+
+rust_library_without_process_wrapper(
+    name = "tinyjson",
+    srcs = glob(["src/*.rs"]),
+    edition = "2018",
+    visibility = ["@rules_rust//util/process_wrapper:__pkg__"],
+)
diff --git a/util/process_wrapper/main.rs b/util/process_wrapper/main.rs
index 41140a3..6d985b3 100644
--- a/util/process_wrapper/main.rs
+++ b/util/process_wrapper/main.rs
@@ -14,50 +14,115 @@
 
 mod flags;
 mod options;
+mod output;
+mod rustc;
 mod util;
 
 use std::fs::{copy, OpenOptions};
-use std::process::{exit, Command, Stdio};
+use std::io;
+use std::process::{exit, Command, ExitStatus, Stdio};
 
 use crate::options::options;
+use crate::output::{process_output, LineOutput};
+
+#[cfg(windows)]
+fn status_code(status: ExitStatus, was_killed: bool) -> i32 {
+    // On windows, there's no good way to know if the process was killed by a signal.
+    // If we killed the process, we override the code to signal success.
+    if was_killed {
+        0
+    } else {
+        status.code().unwrap_or(1)
+    }
+}
+
+#[cfg(not(windows))]
+fn status_code(status: ExitStatus, was_killed: bool) -> i32 {
+    // On unix, if code is None it means that the process was killed by a signal.
+    // https://doc.rust-lang.org/std/process/struct.ExitStatus.html#method.success
+    match status.code() {
+        Some(code) => code,
+        // If we killed the process, we expect None here
+        None if was_killed => 0,
+        // Otherwise it's some unexpected signal
+        None => 1,
+    }
+}
 
 fn main() {
     let opts = match options() {
         Err(err) => panic!("process wrapper error: {}", err),
         Ok(v) => v,
     };
-    let stdout = if let Some(stdout_file) = opts.stdout_file {
-        OpenOptions::new()
-            .create(true)
-            .truncate(true)
-            .write(true)
-            .open(stdout_file)
-            .expect("process wrapper error: unable to open stdout file")
-            .into()
-    } else {
-        Stdio::inherit()
-    };
-    let stderr = if let Some(stderr_file) = opts.stderr_file {
-        OpenOptions::new()
-            .create(true)
-            .truncate(true)
-            .write(true)
-            .open(stderr_file)
-            .expect("process wrapper error: unable to open stderr file")
-            .into()
-    } else {
-        Stdio::inherit()
-    };
-    let status = Command::new(opts.executable)
+
+    let mut child = Command::new(opts.executable)
         .args(opts.child_arguments)
         .env_clear()
         .envs(opts.child_environment)
-        .stdout(stdout)
-        .stderr(stderr)
-        .status()
+        .stdout(if let Some(stdout_file) = opts.stdout_file {
+            OpenOptions::new()
+                .create(true)
+                .truncate(true)
+                .write(true)
+                .open(stdout_file)
+                .expect("process wrapper error: unable to open stdout file")
+                .into()
+        } else {
+            Stdio::inherit()
+        })
+        .stderr(Stdio::piped())
+        .spawn()
         .expect("process wrapper error: failed to spawn child process");
 
-    if status.success() {
+    let mut stderr: Box<dyn io::Write> = if let Some(stderr_file) = opts.stderr_file {
+        Box::new(
+            OpenOptions::new()
+                .create(true)
+                .truncate(true)
+                .write(true)
+                .open(stderr_file)
+                .expect("process wrapper error: unable to open stderr file"),
+        )
+    } else {
+        Box::new(io::stderr())
+    };
+
+    let mut child_stderr = child.stderr.take().unwrap();
+
+    let mut was_killed = false;
+    let result = if let Some(format) = opts.rustc_output_format {
+        let quit_on_rmeta = opts.rustc_quit_on_rmeta;
+        // Process json rustc output and kill the subprocess when we get a signal
+        // that we emitted a metadata file.
+        let mut me = false;
+        let metadata_emitted = &mut me;
+        let result = process_output(&mut child_stderr, stderr.as_mut(), move |line| {
+            if quit_on_rmeta {
+                rustc::stop_on_rmeta_completion(line, format, metadata_emitted)
+            } else {
+                rustc::process_json(line, format)
+            }
+        });
+        if me {
+            // If recv returns Ok(), a signal was sent in this channel so we should terminate the child process.
+            // We can safely ignore the Result from kill() as we don't care if the process already terminated.
+            let _ = child.kill();
+            was_killed = true;
+        }
+        result
+    } else {
+        // Process output normally by forwarding stderr
+        process_output(&mut child_stderr, stderr.as_mut(), LineOutput::Message)
+    };
+    result.expect("process wrapper error: failed to process stderr");
+
+    let status = child
+        .wait()
+        .expect("process wrapper error: failed to wait for child process");
+    // If the child process is rustc and is killed after metadata generation, that's also a success.
+    let code = status_code(status, was_killed);
+    let success = code == 0;
+    if success {
         if let Some(tf) = opts.touch_file {
             OpenOptions::new()
                 .create(true)
@@ -75,5 +140,5 @@
         }
     }
 
-    exit(status.code().unwrap())
+    exit(code)
 }
diff --git a/util/process_wrapper/options.rs b/util/process_wrapper/options.rs
index 24bba9f..869b5c3 100644
--- a/util/process_wrapper/options.rs
+++ b/util/process_wrapper/options.rs
@@ -4,6 +4,7 @@
 use std::process::exit;
 
 use crate::flags::{FlagParseError, Flags, ParseOutcome};
+use crate::rustc;
 use crate::util::*;
 
 #[derive(Debug)]
@@ -38,12 +39,19 @@
     pub(crate) stdout_file: Option<String>,
     // If set, redirects the child process stderr to this file.
     pub(crate) stderr_file: Option<String>,
+    // If set, it configures rustc to emit an rmeta file and then
+    // quit.
+    pub(crate) rustc_quit_on_rmeta: bool,
+    // If rustc_quit_on_rmeta is set to true, this controls the
+    // output format of rustc messages.
+    pub(crate) rustc_output_format: Option<rustc::ErrorFormat>,
 }
 
 pub(crate) fn options() -> Result<Options, OptionError> {
     // Process argument list until -- is encountered.
     // Everything after is sent to the child process.
     let mut subst_mapping_raw = None;
+    let mut stable_status_file_raw = None;
     let mut volatile_status_file_raw = None;
     let mut env_file_raw = None;
     let mut arg_file_raw = None;
@@ -51,8 +59,11 @@
     let mut copy_output_raw = None;
     let mut stdout_file = None;
     let mut stderr_file = None;
+    let mut rustc_quit_on_rmeta_raw = None;
+    let mut rustc_output_format_raw = None;
     let mut flags = Flags::new();
     flags.define_repeated_flag("--subst", "", &mut subst_mapping_raw);
+    flags.define_flag("--stable-status-file", "", &mut stable_status_file_raw);
     flags.define_flag("--volatile-status-file", "", &mut volatile_status_file_raw);
     flags.define_repeated_flag(
         "--env-file",
@@ -80,6 +91,19 @@
         "Redirect subprocess stderr in this file.",
         &mut stderr_file,
     );
+    flags.define_flag(
+        "--rustc-quit-on-rmeta",
+        "If enabled, this wrapper will terminate rustc after rmeta has been emitted.",
+        &mut rustc_quit_on_rmeta_raw,
+    );
+    flags.define_flag(
+        "--rustc-output-format",
+        "Controls the rustc output format if --rustc-quit-on-rmeta is set.\n\
+        'json' will cause the json output to be output, \
+        'rendered' will extract the rendered message and print that.\n\
+        Default: `rendered`",
+        &mut rustc_output_format_raw,
+    );
 
     let mut child_args = match flags
         .parse(env::args().collect())
@@ -112,9 +136,10 @@
             Ok((key.to_owned(), v))
         })
         .collect::<Result<Vec<(String, String)>, OptionError>>()?;
-    let stamp_mappings =
+    let stable_stamp_mappings =
+        stable_status_file_raw.map_or_else(Vec::new, |s| read_stamp_status_to_array(s).unwrap());
+    let volatile_stamp_mappings =
         volatile_status_file_raw.map_or_else(Vec::new, |s| read_stamp_status_to_array(s).unwrap());
-
     let environment_file_block = env_from_files(env_file_raw.unwrap_or_default())?;
     let mut file_arguments = args_from_file(arg_file_raw.unwrap_or_default())?;
     // Process --copy-output
@@ -138,9 +163,26 @@
         })
         .transpose()?;
 
+    let rustc_quit_on_rmeta = rustc_quit_on_rmeta_raw.map_or(false, |s| s == "true");
+    let rustc_output_format = rustc_output_format_raw
+        .map(|v| match v.as_str() {
+            "json" => Ok(rustc::ErrorFormat::Json),
+            "rendered" => Ok(rustc::ErrorFormat::Rendered),
+            _ => Err(OptionError::Generic(format!(
+                "invalid --rustc-output-format '{}'",
+                v
+            ))),
+        })
+        .transpose()?;
+
     // Prepare the environment variables, unifying those read from files with the ones
     // of the current process.
-    let vars = environment_block(environment_file_block, &stamp_mappings, &subst_mappings);
+    let vars = environment_block(
+        environment_file_block,
+        &stable_stamp_mappings,
+        &volatile_stamp_mappings,
+        &subst_mappings,
+    );
     // Append all the arguments fetched from files to those provided via command line.
     child_args.append(&mut file_arguments);
     let child_args = prepare_args(child_args, &subst_mappings);
@@ -159,13 +201,20 @@
         copy_output,
         stdout_file,
         stderr_file,
+        rustc_quit_on_rmeta,
+        rustc_output_format,
     })
 }
 
 fn args_from_file(paths: Vec<String>) -> Result<Vec<String>, OptionError> {
     let mut args = vec![];
-    for path in paths.into_iter() {
-        let mut lines = read_file_to_array(path).map_err(OptionError::Generic)?;
+    for path in paths.iter() {
+        let mut lines = read_file_to_array(path).map_err(|err| {
+            OptionError::Generic(format!(
+                "{} while processing args from file paths: {:?}",
+                err, &paths
+            ))
+        })?;
         args.append(&mut lines);
     }
     Ok(args)
@@ -174,7 +223,7 @@
 fn env_from_files(paths: Vec<String>) -> Result<HashMap<String, String>, OptionError> {
     let mut env_vars = HashMap::new();
     for path in paths.into_iter() {
-        let lines = read_file_to_array(path).map_err(OptionError::Generic)?;
+        let lines = read_file_to_array(&path).map_err(OptionError::Generic)?;
         for line in lines.into_iter() {
             let (k, v) = line
                 .split_once('=')
@@ -198,7 +247,8 @@
 
 fn environment_block(
     environment_file_block: HashMap<String, String>,
-    stamp_mappings: &[(String, String)],
+    stable_stamp_mappings: &[(String, String)],
+    volatile_stamp_mappings: &[(String, String)],
     subst_mappings: &[(String, String)],
 ) -> HashMap<String, String> {
     // Taking all environment variables from the current process
@@ -208,7 +258,7 @@
     // This is simpler than needing to track duplicates and explicitly override
     // them.
     environment_variables.extend(environment_file_block.into_iter());
-    for (f, replace_with) in stamp_mappings {
+    for (f, replace_with) in &[stable_stamp_mappings, volatile_stamp_mappings].concat() {
         for value in environment_variables.values_mut() {
             let from = format!("{{{}}}", f);
             let new = value.replace(from.as_str(), replace_with);
diff --git a/util/process_wrapper/output.rs b/util/process_wrapper/output.rs
new file mode 100644
index 0000000..84d61d9
--- /dev/null
+++ b/util/process_wrapper/output.rs
@@ -0,0 +1,56 @@
+// Copyright 2020 The Bazel Authors. All rights reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//    http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+use std::io::{self, prelude::*};
+
+/// LineOutput tells process_output what to do when a line is processed.
+/// If a Message is returned, it will be written to write_end, if
+/// Skip is returned nothing will be printed and execution continues,
+/// if Terminate is returned, process_output returns immediately.
+/// Terminate is used to stop processing when we see an emit metadata
+/// message.
+#[derive(Debug)]
+pub(crate) enum LineOutput {
+    Message(String),
+    Skip,
+    Terminate,
+}
+
+/// process_output reads lines from read_end and invokes process_line on each.
+/// Depending on the result of process_line, the modified message may be written
+/// to write_end.
+pub(crate) fn process_output<F>(
+    read_end: &mut dyn Read,
+    write_end: &mut dyn Write,
+    mut process_line: F,
+) -> io::Result<()>
+where
+    F: FnMut(String) -> LineOutput,
+{
+    let mut reader = io::BufReader::new(read_end);
+    let mut writer = io::LineWriter::new(write_end);
+    loop {
+        let mut line = String::new();
+        let read_bytes = reader.read_line(&mut line)?;
+        if read_bytes == 0 {
+            break;
+        }
+        match process_line(line) {
+            LineOutput::Message(to_write) => writer.write_all(to_write.as_bytes())?,
+            LineOutput::Skip => {}
+            LineOutput::Terminate => return Ok(()),
+        };
+    }
+    Ok(())
+}
diff --git a/util/process_wrapper/rustc.rs b/util/process_wrapper/rustc.rs
new file mode 100644
index 0000000..ca79680
--- /dev/null
+++ b/util/process_wrapper/rustc.rs
@@ -0,0 +1,112 @@
+// Copyright 2020 The Bazel Authors. All rights reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//    http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+use std::convert::{TryFrom, TryInto};
+
+use tinyjson::JsonValue;
+
+use crate::output::LineOutput;
+
+#[derive(Debug, Copy, Clone)]
+pub(crate) enum ErrorFormat {
+    Json,
+    Rendered,
+}
+
+impl Default for ErrorFormat {
+    fn default() -> Self {
+        Self::Rendered
+    }
+}
+
+fn get_key(value: &JsonValue, key: &str) -> Option<String> {
+    if let JsonValue::Object(map) = value {
+        if let JsonValue::String(s) = map.get(key)? {
+            Some(s.clone())
+        } else {
+            None
+        }
+    } else {
+        None
+    }
+}
+
+#[derive(Debug)]
+enum RustcMessage {
+    Emit(String),
+    Message(String),
+}
+
+impl TryFrom<JsonValue> for RustcMessage {
+    type Error = ();
+    fn try_from(val: JsonValue) -> Result<Self, Self::Error> {
+        if let Some(emit) = get_key(&val, "emit") {
+            return Ok(Self::Emit(emit));
+        }
+        if let Some(rendered) = get_key(&val, "rendered") {
+            return Ok(Self::Message(rendered));
+        }
+        Err(())
+    }
+}
+
+/// process_rustc_json takes an output line from rustc configured with
+/// --error-format=json, parses the json and returns the appropriate output
+/// according to the original --error-format supplied.
+/// Only messages are returned, emits are ignored.
+pub(crate) fn process_json(line: String, error_format: ErrorFormat) -> LineOutput {
+    let parsed: JsonValue = line
+        .parse()
+        .expect("process wrapper error: expected json messages in pipeline mode");
+    match parsed.try_into() {
+        Ok(RustcMessage::Message(msg)) => match error_format {
+            // If the output should be json, we just forward the messages as-is
+            // using `line`.
+            ErrorFormat::Json => LineOutput::Message(line),
+            // Otherwise we return the rendered field.
+            _ => LineOutput::Message(msg),
+        },
+        _ => LineOutput::Skip,
+    }
+}
+
+/// stop_on_rmeta_completion parses the json output of rustc in the same way process_rustc_json does.
+/// In addition, it will signal to stop when metadata is emitted
+/// so the compiler can be terminated.
+/// This is used to implement pipelining in rules_rust, please see
+/// https://internals.rust-lang.org/t/evaluating-pipelined-rustc-compilation/10199
+pub(crate) fn stop_on_rmeta_completion(
+    line: String,
+    error_format: ErrorFormat,
+    kill: &mut bool,
+) -> LineOutput {
+    let parsed: JsonValue = line
+        .parse()
+        .expect("process wrapper error: expected json messages in pipeline mode");
+
+    match parsed.try_into() {
+        Ok(RustcMessage::Emit(emit)) if emit == "metadata" => {
+            *kill = true;
+            LineOutput::Terminate
+        }
+        Ok(RustcMessage::Message(msg)) => match error_format {
+            // If the output should be json, we just forward the messages as-is
+            // using `line`.
+            ErrorFormat::Json => LineOutput::Message(line),
+            // Otherwise we return the rendered field.
+            _ => LineOutput::Message(msg),
+        },
+        _ => LineOutput::Skip,
+    }
+}
diff --git a/util/process_wrapper/util.rs b/util/process_wrapper/util.rs
index 4b3d6bb..89f2ded 100644
--- a/util/process_wrapper/util.rs
+++ b/util/process_wrapper/util.rs
@@ -15,8 +15,16 @@
 use std::fs::File;
 use std::io::{BufRead, BufReader, Read};
 
-pub(crate) fn read_file_to_array(path: String) -> Result<Vec<String>, String> {
-    let file = File::open(path).map_err(|e| e.to_string())?;
+pub(crate) fn read_file_to_array(path: &str) -> Result<Vec<String>, String> {
+    let file = File::open(path).map_err(|e| e.to_string()).map_err(|err| {
+        format!(
+            "{} reading path: {:?}, current directory: {:?}",
+            err,
+            path,
+            std::env::current_dir()
+        )
+    })?;
+
     read_to_array(file)
 }