31 lines
1.4 KiB
Python
31 lines
1.4 KiB
Python
# Copyright 2022 Google LLC
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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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# https://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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"""This module provides a custom Starlark rule used to create wrappers for targets that
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can have blaze build --check_licenses executed against them."""
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def _shim_rule_impl(ctx):
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# This rule doesn't need to return anything. It only exists to propagate the dependency supplied
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# by the label_flag
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return []
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shim_rule = rule(
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doc = """This rule exists to configure a dependent target via label. An instantiation of this
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rule is then used as a dependency for the legacy_check_target rule, which can be built with --check_licenses
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to get the effect of running --check_licenses on an arbitrary target which may or may not have a distribs
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attribute""",
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implementation = _shim_rule_impl,
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# The definition of this attribute creates a dependency relationship on the manually provided label.
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attrs = {"target": attr.label(default = ":check_licenses_target")},
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)
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