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Diffstat (limited to 'rules/check_licenses_shim.bzl')
-rw-r--r-- | rules/check_licenses_shim.bzl | 30 |
1 files changed, 30 insertions, 0 deletions
diff --git a/rules/check_licenses_shim.bzl b/rules/check_licenses_shim.bzl new file mode 100644 index 0000000..3dcfe2c --- /dev/null +++ b/rules/check_licenses_shim.bzl @@ -0,0 +1,30 @@ +# Copyright 2022 Google LLC +# +# Licensed under the Apache License, Version 2.0 (the "License"); +# you may not use this file except in compliance with the License. +# You may obtain a copy of the License at +# +# https://www.apache.org/licenses/LICENSE-2.0 +# +# Unless required by applicable law or agreed to in writing, software +# distributed under the License is distributed on an "AS IS" BASIS, +# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +# See the License for the specific language governing permissions and +# limitations under the License. +"""This module provides a custom Starlark rule used to create wrappers for targets that +can have blaze build --check_licenses executed against them.""" + +def _shim_rule_impl(ctx): + # This rule doesn't need to return anything. It only exists to propagate the dependency supplied + # by the label_flag + return [] + +shim_rule = rule( + doc = """This rule exists to configure a dependent target via label. An instantiation of this + rule is then used as a dependency for the legacy_check_target rule, which can be built with --check_licenses + to get the effect of running --check_licenses on an arbitrary target which may or may not have a distribs + attribute""", + implementation = _shim_rule_impl, + # The definition of this attribute creates a dependency relationship on the manually provided label. + attrs = {"target": attr.label(default = ":check_licenses_target")}, +) |