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# Protocol Buffers - Google's data interchange format
# Copyright 2024 Google Inc. All rights reserved.
#
# Use of this source code is governed by a BSD-style
# license that can be found in the LICENSE file or at
# https://developers.google.com/open-source/licenses/bsd
#
"""Vendored version of bazel_features for protobuf, to keep a one-step setup"""
_PROTO_BAZEL_FEATURES = """bazel_features = struct(
cc = struct(
protobuf_on_allowlist = {protobuf_on_allowlist},
),
proto = struct(
starlark_proto_info = {starlark_proto_info},
),
globals = struct(
PackageSpecificationInfo = {PackageSpecificationInfo},
ProtoInfo = getattr(getattr(native, 'legacy_globals', None), 'ProtoInfo', {ProtoInfo}),
cc_proto_aspect = getattr(getattr(native, 'legacy_globals', None), 'cc_proto_aspect', {cc_proto_aspect}),
),
)
"""
def _proto_bazel_features_impl(rctx):
# An empty string is treated as a "dev version", which is greater than anything.
bazel_version = native.bazel_version or "999999.999999.999999"
version_parts = bazel_version.split("-")[0].split(".")
if len(version_parts) != 3:
fail("invalid Bazel version '{}': got {} dot-separated segments, want 3".format(bazel_version, len(version_parts)))
major_version_int = int(version_parts[0])
minor_version_int = int(version_parts[1])
starlark_proto_info = major_version_int >= 7
PackageSpecificationInfo = major_version_int > 6 or (major_version_int == 6 and minor_version_int >= 4)
protobuf_on_allowlist = major_version_int > 7
ProtoInfo = "ProtoInfo" if major_version_int < 8 else "None"
cc_proto_aspect = "cc_proto_aspect" if major_version_int < 8 else "None"
rctx.file("BUILD.bazel", """
load("@bazel_skylib//:bzl_library.bzl", "bzl_library")
bzl_library(
name = "features",
srcs = ["features.bzl"],
visibility = ["//visibility:public"],
)
exports_files(["features.bzl"])
""")
rctx.file("features.bzl", _PROTO_BAZEL_FEATURES.format(
starlark_proto_info = repr(starlark_proto_info),
PackageSpecificationInfo = "PackageSpecificationInfo" if PackageSpecificationInfo else "None",
protobuf_on_allowlist = repr(protobuf_on_allowlist),
ProtoInfo = ProtoInfo,
cc_proto_aspect = cc_proto_aspect,
))
proto_bazel_features = repository_rule(
implementation = _proto_bazel_features_impl,
# Force reruns on server restarts to keep native.bazel_version up-to-date.
local = True,
)
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