24 lines
1.3 KiB
Python
24 lines
1.3 KiB
Python
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# Copyright (C) 2022 The Android Open Source Project
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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# Bazel still resolves toolchains even if targets are marked incompatible with
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# target_compatible_with, which can cause failures due to the toolchain not being found.
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# To work around this issue, some rules make the toolchain optional, but then in their
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# impl functions assert that it exists. This helper function can do that assertion.
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def verify_toolchain_exists(ctx, toolchain):
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if not ctx.toolchains[toolchain]:
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# Mimic the bazel failure if this toolchain was mandatory
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fail("While resolving toolchains for target %s: No matching toolchains found for types %s.\nTo debug, rerun with --toolchain_resolution_debug='%s'" %
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(str(ctx.label), toolchain, toolchain))
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