| # buildifier: disable=module-docstring |
| load("@bazel_skylib//:workspace.bzl", "bazel_skylib_workspace") |
| load("@bazel_skylib//lib:versions.bzl", "versions") |
| |
| _MINIMUM_SUPPORTED_BAZEL_VERSION = "0.17.1" |
| |
| def _bazel_version_impl(repository_ctx): |
| """The implementation for the `bazel_version` rule |
| |
| Args: |
| repository_ctx (repository_ctx): The repository rules context object |
| """ |
| bazel_version = versions.get() |
| if len(bazel_version) == 0: |
| # buildifier: disable=print |
| print("You're using development build of Bazel, make sure it's at least version {}".format( |
| _MINIMUM_SUPPORTED_BAZEL_VERSION, |
| )) |
| elif versions.is_at_most(_MINIMUM_SUPPORTED_BAZEL_VERSION, bazel_version): |
| fail("Bazel {} is too old to use with rules_rust, please use at least Bazel {}, preferably newer.".format( |
| bazel_version, |
| _MINIMUM_SUPPORTED_BAZEL_VERSION, |
| )) |
| repository_ctx.file("BUILD.bazel", "exports_files(['def.bzl'])") |
| repository_ctx.file("def.bzl", "BAZEL_VERSION='" + bazel_version + "'") |
| |
| bazel_version = repository_rule( |
| doc = ( |
| "A repository rule that generates a new repository which contains a representation of " + |
| "the version of Bazel being used." |
| ), |
| implementation = _bazel_version_impl, |
| ) |
| |
| def rust_workspace(): |
| """A helper macro for setting up requirements for `rules_rust` within a given workspace. |
| |
| This macro should always loaded and invoked after `rust_repositories` within a WORKSPACE |
| file. |
| """ |
| |
| bazel_skylib_workspace() |
| |
| bazel_version(name = "bazel_version") |
