Squashed 'third_party/rules_rust/' content from commit bf59038ca

git-subtree-dir: third_party/rules_rust
git-subtree-split: bf59038cac11798cbaef9f3bf965bad8182b97fa
Signed-off-by: Brian Silverman <bsilver16384@gmail.com>
Change-Id: I5a20e403203d670df467ea97dde9a4ac40339a8d
diff --git a/examples/hello_runfiles/BUILD.bazel b/examples/hello_runfiles/BUILD.bazel
new file mode 100644
index 0000000..64a6c13
--- /dev/null
+++ b/examples/hello_runfiles/BUILD.bazel
@@ -0,0 +1,25 @@
+# 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.
+
+load("@rules_rust//rust:defs.bzl", "rust_binary")
+
+package(default_visibility = ["//visibility:public"])
+
+rust_binary(
+    name = "hello_runfiles",
+    srcs = ["hello_runfiles.rs"],
+    data = ["hello_runfiles.rs"],  # Yes, we're being cute.
+    edition = "2018",
+    deps = ["@rules_rust//tools/runfiles"],
+)
diff --git a/examples/hello_runfiles/hello_runfiles.rs b/examples/hello_runfiles/hello_runfiles.rs
new file mode 100644
index 0000000..b8a5e45
--- /dev/null
+++ b/examples/hello_runfiles/hello_runfiles.rs
@@ -0,0 +1,15 @@
+use std::fs::File;
+use std::io::prelude::*;
+
+use runfiles::Runfiles;
+
+fn main() {
+    let r = Runfiles::create().unwrap();
+
+    let mut f = File::open(r.rlocation("examples/hello_runfiles/hello_runfiles.rs")).unwrap();
+
+    let mut buffer = String::new();
+    f.read_to_string(&mut buffer).unwrap();
+
+    println!("This program's source is {} characters long.", buffer.len());
+}