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# Copyright 2020 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.
"""Proof of concept. License restriction."""
load(
"@rules_license//rules:providers.bzl",
"LicenseInfo",
"LicensesInfo",
)
# An experiment to provide license defaults via a rule. This is far from
# working and should not be considered part of the current design.
#
def _default_licenses_impl(ctx):
licenses = []
for dep in ctx.attr.deps:
if LicenseInfo in dep:
licenses.append(dep[LicenseInfo])
return [LicensesInfo(licenses = licenses)]
_default_licenses = rule(
implementation = _default_licenses_impl,
attrs = {
"conditions": attr.string_list(
doc = "TBD",
),
"deps": attr.label_list(
mandatory = True,
doc = "Licenses",
providers = [LicenseInfo],
cfg = "exec",
),
},
)
# buildifier: disable=unnamed-macro
def default_licenses(licenses, conditions = None):
_default_licenses(
name = "__default_licenses",
deps = ["%s_license" % license for license in licenses],
conditions = conditions,
)
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