mirror of
https://github.com/bazel-contrib/rules_foreign_cc
synced 2024-11-28 08:43:26 +00:00
43a43353ff
* Moved more toolchain related rules into `./toolchains` * Updated toolchain locations in rules
73 lines
2.1 KiB
Python
73 lines
2.1 KiB
Python
"""A module defining a repository rule for housing toolchain definitions"""
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_BUILD_FILE = """\
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load("@rules_foreign_cc//toolchains/native_tools:native_tools_toolchain.bzl", "native_tool_toolchain")
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{toolchains}
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"""
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_TOOLCHAIN = """\
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toolchain(
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name = "{repo}_toolchain",
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exec_compatible_with = {exec_compatible_with},
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toolchain = "@{repo}//:{tool}_tool",
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toolchain_type = "@rules_foreign_cc//toolchains:{tool}_toolchain",
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)
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"""
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_TOOLCHAIN_BZL = """\
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def register_toolchains():
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native.register_toolchain(
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{toolchains}
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)
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"""
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_WORKSPACE_FILE = """\
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workspace(name = "{}")
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"""
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def _prebuilt_toolchains_repository_impl(repository_ctx):
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build_file = repository_ctx.path("BUILD.bazel")
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repository_ctx.file(build_file, _BUILD_FILE.format(
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toolchains = "\n".join([
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_TOOLCHAIN.format(
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repo = repo,
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tool = repository_ctx.attr.tool,
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exec_compatible_with = compat,
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)
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for repo, compat in repository_ctx.attr.repos.items()
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]),
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))
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bzl_file = repository_ctx.path("toolchains.bzl")
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repository_ctx.file(bzl_file, _TOOLCHAIN_BZL.format(
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toolchains = "\n".join([
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" \"@{repo}//:{tool}_tool\",".format(
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repo = repo,
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tool = repository_ctx.attr.tool,
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)
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for repo in repository_ctx.attr.repos.keys()
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]),
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))
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workspace_file = repository_ctx.path("WORKSPACE.bazel")
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repository_ctx.file(workspace_file, _WORKSPACE_FILE.format(
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repository_ctx.name,
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))
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prebuilt_toolchains_repository = repository_rule(
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doc = "A repository rule which houses toolchain definitions",
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implementation = _prebuilt_toolchains_repository_impl,
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attrs = {
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"repos": attr.string_list_dict(
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doc = "A mapping of repository names to platform restrictions",
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mandatory = True,
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),
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"tool": attr.string(
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doc = "The name of the tool the toolchains represent",
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mandatory = True,
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values = ["cmake", "ninja"],
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),
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},
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)
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