1# Copyright 2024 The Pigweed Authors 2# 3# Licensed under the Apache License, Version 2.0 (the "License"); you may not 4# use this file except in compliance with the License. You may obtain a copy of 5# the License at 6# 7# https://www.apache.org/licenses/LICENSE-2.0 8# 9# Unless required by applicable law or agreed to in writing, software 10# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT 11# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the 12# License for the specific language governing permissions and limitations under 13# the License. 14"""A basic extension for exposing a macOS host's local Xcode libraries.""" 15 16def _get_xcode_sdk_root(extension_ctx): 17 xcrun_result = extension_ctx.execute(["/usr/bin/xcrun", "--show-sdk-path"]) 18 if xcrun_result.return_code != 0: 19 fail("Failed locating Xcode SDK: {}".format(xcrun_result.stderr)) 20 return xcrun_result.stdout.replace("\n", "") 21 22# If you squint hard enough, this looks like a new_local_repository, but 23# we very intentionally avoid using new_local_repository here since the xcode 24# SDK path gets baked into the MODULE.bazel.lock which breaks CI/CQ bots. 25# 26# See https://issues.pigweed.dev/issues/346388161#comment24 for more details. 27def _xcode_repository_impl(repository_ctx): 28 if repository_ctx.os.name != "mac os x": 29 fail( 30 "Cannot expose a local Xcode SDK on {} hosts. This repository " + 31 "rule only works on macOS hosts. It's possible a rule from one " + 32 "of your build files is referencing this repository and is not " + 33 "properly gated behind a `target_compatible_with` expression or " + 34 "`select()` statement." % (repository_ctx.os,), 35 ) 36 p = repository_ctx.path(_get_xcode_sdk_root(repository_ctx)) 37 children = p.readdir() 38 for child in children: 39 repository_ctx.symlink(child, child.basename) 40 repository_ctx.symlink(repository_ctx.attr.build_file, "BUILD") 41 42xcode_sdk_repository = repository_rule( 43 implementation = _xcode_repository_impl, 44 attrs = { 45 "build_file": attr.label( 46 allow_single_file = True, 47 ), 48 }, 49 local = True, 50 configure = True, 51) 52