48 lines
1.8 KiB
Python
48 lines
1.8 KiB
Python
"""A Starlark implementation of the proto_toolchain rule."""
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load("//bazel/common:proto_common.bzl", "proto_common")
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load("//bazel/common:proto_lang_toolchain_info.bzl", "ProtoLangToolchainInfo")
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def _impl(ctx):
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kwargs = {}
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if getattr(proto_common, "INCOMPATIBLE_PASS_TOOLCHAIN_TYPE", False):
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kwargs["toolchain_type"] = "@rules_proto//proto:toolchain_type"
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return [
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DefaultInfo(
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files = depset(),
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runfiles = ctx.runfiles(),
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),
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platform_common.ToolchainInfo(
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proto = ProtoLangToolchainInfo(
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out_replacement_format_flag = ctx.attr.command_line,
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output_files = ctx.attr.output_files,
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plugin = None,
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runtime = None,
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proto_compiler = ctx.attr.proto_compiler.files_to_run,
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protoc_opts = ctx.fragments.proto.experimental_protoc_opts,
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progress_message = ctx.attr.progress_message,
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mnemonic = ctx.attr.mnemonic,
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**kwargs
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),
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),
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]
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proto_toolchain = rule(
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_impl,
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attrs =
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{
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"progress_message": attr.string(default = "Generating Descriptor Set proto_library %{label}"),
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"mnemonic": attr.string(default = "GenProtoDescriptorSet"),
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"command_line": attr.string(default = "--descriptor_set_out=%s"),
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"output_files": attr.string(values = ["single", "multiple", "legacy"], default = "single"),
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"proto_compiler": attr.label(
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cfg = "exec",
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executable = True,
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allow_files = True, # Used by mocks in tests. Consider fixing tests and removing it.
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),
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},
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provides = [platform_common.ToolchainInfo],
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fragments = ["proto"],
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)
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