# Copyright 2017 Google Inc. All Rights Reserved.
# Copyright 2017 The Bazel Authors. All rights reserved.
#
# 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
#
#    http://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 rule exposes the source jar of a java_*_library rule as a label."""

def _java_library_srcs_impl(ctx):
  if len(ctx.attr.deps) != 1:
    fail("Only one deps value supported", "deps")
  dep = ctx.attr.deps[0]
  return [DefaultInfo(files=depset(dep.java.source_jars))]


_java_library_srcs = rule(
    implementation=_java_library_srcs_impl,
    attrs={
        "deps":
            attr.label_list(
                mandatory=True,
                non_empty=True,
                providers=["java"],)
    })


def java_library_srcs(name, deps, visibility=None, **kwargs):
  """Provides the source jars generated by a java_*_library rule."""
  _java_library_srcs(name=name, deps=deps, visibility=visibility, **kwargs)