Protocol Buffers - Google's data interchange format (grpc依赖)
https://developers.google.com/protocol-buffers/
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50 lines
1.7 KiB
50 lines
1.7 KiB
8 months ago
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# Protocol Buffers - Google's data interchange format
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# Copyright 2024 Google Inc. All rights reserved.
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#
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# Use of this source code is governed by a BSD-style
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# license that can be found in the LICENSE file or at
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# https://developers.google.com/open-source/licenses/bsd
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#
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"""
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Toolchain helpers.
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The helpers here should be used for a migration to toolchain in proto rules.
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Anybody that needs them in another repository should copy them, because after
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the migration is finished, the helpers can be removed.
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"""
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load("//bazel/common:proto_lang_toolchain_info.bzl", "ProtoLangToolchainInfo")
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load("//bazel/private:native.bzl", "native_proto_common")
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_incompatible_toolchain_resolution = getattr(native_proto_common, "INCOMPATIBLE_ENABLE_PROTO_TOOLCHAIN_RESOLUTION", False)
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def _find_toolchain(ctx, legacy_attr, toolchain_type):
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if _incompatible_toolchain_resolution:
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toolchain = ctx.toolchains[toolchain_type]
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if not toolchain:
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fail("No toolchains registered for '%s'." % toolchain_type)
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return toolchain.proto
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else:
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return getattr(ctx.attr, legacy_attr)[ProtoLangToolchainInfo]
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def _use_toolchain(toolchain_type):
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if _incompatible_toolchain_resolution:
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return [config_common.toolchain_type(toolchain_type, mandatory = False)]
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else:
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return []
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def _if_legacy_toolchain(legacy_attr_dict):
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if _incompatible_toolchain_resolution:
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return {}
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else:
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return legacy_attr_dict
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toolchains = struct(
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use_toolchain = _use_toolchain,
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find_toolchain = _find_toolchain,
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if_legacy_toolchain = _if_legacy_toolchain,
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INCOMPATIBLE_ENABLE_PROTO_TOOLCHAIN_RESOLUTION = _incompatible_toolchain_resolution,
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PROTO_TOOLCHAIN = "@rules_proto//proto:toolchain_type",
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)
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