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/rust/private/common.bzl b/rust/private/common.bzl
new file mode 100644
index 0000000..78a3011
--- /dev/null
+++ b/rust/private/common.bzl
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+# Copyright 2021 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.
+
+"""A resilient API layer wrapping compilation and other logic for Rust rules.
+
+This module is meant to be used by custom rules that need to compile Rust code
+and cannot simply rely on writing a macro that wraps `rust_library`. This module
+provides the lower-level interface to Rust providers, actions, and functions.
+Do not load this file directly; instead, load the top-level `defs.bzl` file,
+which exports the `rust_common` struct.
+
+In the Bazel lingo, `rust_common` gives the access to the Rust Sandwich API.
+"""
+
+load(":providers.bzl", "CrateInfo", "DepInfo", "StdLibInfo")
+
+# These constants only represent the default value for attributes and macros
+# defiend in `rules_rust`. Like any attribute public attribute, they can be
+# overwritten by the user on the rules they're defiend on.
+#
+# Note: Code in `.github/workflows/crate_universe.yaml` looks for this line, if
+# you remove it or change its format, you will also need to update that code.
+DEFAULT_RUST_VERSION = "1.59.0"
+DEFAULT_RUST_EDITION = "2018"
+
+def _create_crate_info(**kwargs):
+ """A constructor for a `CrateInfo` provider
+
+ This function should be used in place of directly creating a `CrateInfo`
+ provider to improve API stability.
+
+ Args:
+ **kwargs: An inital set of keyword arguments.
+
+ Returns:
+ CrateInfo: A provider
+ """
+ if not "wrapped_crate_type" in kwargs:
+ kwargs.update({"wrapped_crate_type": None})
+ return CrateInfo(**kwargs)
+
+rust_common = struct(
+ create_crate_info = _create_crate_info,
+ crate_info = CrateInfo,
+ dep_info = DepInfo,
+ stdlib_info = StdLibInfo,
+ default_edition = DEFAULT_RUST_EDITION,
+ default_version = DEFAULT_RUST_VERSION,
+)