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# 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.
"""Rules for declaring the licenses used by a package.
"""
load(
"@rules_license//rules:providers.bzl",
"LicenseInfo",
"LicenseKindInfo",
)
# Debugging verbosity
_VERBOSITY = 0
def _debug(loglevel, msg):
if _VERBOSITY > loglevel:
print(msg) # buildifier: disable=print
#
# license()
#
def license_rule_impl(ctx):
provider = LicenseInfo(
license_kinds = tuple([k[LicenseKindInfo] for k in ctx.attr.license_kinds]),
copyright_notice = ctx.attr.copyright_notice,
package_name = ctx.attr.package_name or ctx.build_file_path.rstrip("/BUILD"),
package_url = ctx.attr.package_url,
package_version = ctx.attr.package_version,
license_text = ctx.file.license_text,
label = ctx.label,
namespace = ctx.attr.namespace,
)
_debug(0, provider)
return [provider]
license_impl = rule(
implementation = license_rule_impl,
attrs = {
"license_kinds": attr.label_list(
mandatory = False,
doc = "License kind(s) of this license. If multiple license kinds are" +
" listed in the LICENSE file, and they all apply, then all" +
" should be listed here. If the user can choose a single one" +
" of many, then only list one here.",
providers = [LicenseKindInfo],
cfg = "exec",
),
"copyright_notice": attr.string(
doc = "Copyright notice.",
),
"license_text": attr.label(
allow_single_file = True,
default = "LICENSE",
doc = "The license file.",
),
"package_name": attr.string(
doc = "A human readable name identifying this package." +
" This may be used to produce an index of OSS packages used by" +
" an applicatation.",
),
"namespace": attr.string(
doc = "A human readable name used to organize licenses into categories." +
" This is used in google3 to differentiate third party licenses used" +
" for compliance versus internal licenses used by SLAsan for internal" +
" teams' SLAs.",
),
},
)
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