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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.
"""License compliance checking at analysis time."""
load(
"@rules_license//rules:gather_licenses_info.bzl",
"gather_licenses_info",
)
load(
"@rules_license//rules:license_policy_provider.bzl",
"LicensePolicyInfo",
)
load(
"@rules_license//rules:providers.bzl",
"LicensesInfo",
)
def _license_policy_check_impl(ctx):
policy = ctx.attr.policy[LicensePolicyInfo]
allowed_conditions = policy.conditions
if LicensesInfo in ctx.attr.target:
for license in ctx.attr.target[LicensesInfo].licenses.to_list():
for kind in license.license_kinds:
# print(kind.conditions)
for condition in kind.conditions:
if condition not in allowed_conditions:
fail("Condition %s violates policy %s" % (
condition,
policy.label,
))
return [DefaultInfo()]
_license_policy_check = rule(
implementation = _license_policy_check_impl,
doc = """Internal tmplementation method for license_policy_check().""",
attrs = {
"policy": attr.label(
doc = """Policy definition.""",
mandatory = True,
providers = [LicensePolicyInfo],
),
"target": attr.label(
doc = """Target to collect LicenseInfo for.""",
aspects = [gather_licenses_info],
mandatory = True,
allow_single_file = True,
),
},
)
def license_policy_check(name, target, policy, **kwargs):
"""Checks a target against a policy.
Args:
name: The target.
target: A target to test for compliance with a policy
policy: A rule providing LicensePolicyInfo.
**kwargs: other args.
Usage:
license_policy_check(
name = "license_info",
target = ":my_app",
policy = "//my_org/compliance/policies:mobile_application",
)
"""
_license_policy_check(name = name, target = target, policy = policy, **kwargs)
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