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// Copyright 2018 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.

package com.google.devtools.build.lib.skylarkbuildapi;

import com.google.common.collect.ImmutableList;
import com.google.devtools.build.lib.collect.nestedset.NestedSet;
import com.google.devtools.build.lib.skylarkinterface.SkylarkCallable;
import com.google.devtools.build.lib.skylarkinterface.SkylarkModule;

/**
 * Info object propagating information about protocol buffer sources.
 */
@SkylarkModule(name = "ProtoSourcesProvider", doc = "")
public interface ProtoSourcesProviderApi<FileT extends FileApi> {

  @SkylarkCallable(
    name = "transitive_imports",
    doc = "Transitive imports including weak dependencies.",
    structField = true
  )
  public NestedSet<FileT> getTransitiveImports();

  @SkylarkCallable(
    name = "transitive_sources",
    doc = "Proto sources for this rule and all its dependent protocol buffer rules.",
    structField = true
  )
  // TODO(bazel-team): The difference between transitive imports and transitive proto sources
  // should never be used by Skylark or by an Aspect. One of these two should be removed,
  // preferably soon, before Skylark users start depending on them.
  public NestedSet<FileT> getTransitiveProtoSources();

  @SkylarkCallable(
    name = "direct_sources",
    doc = "Proto sources from the 'srcs' attribute.",
    structField = true
  )
  public ImmutableList<FileT> getDirectProtoSources();

  @SkylarkCallable(
    name = "check_deps_sources",
    doc =
        "Proto sources from the 'srcs' attribute. If the library is a proxy library "
            + "that has no sources, it contains the check_deps_sources "
            + "from this library's direct deps.",
    structField = true
  )
  public NestedSet<FileT> getCheckDepsProtoSources();

  @SkylarkCallable(
    name = "direct_descriptor_set",
    doc =
        "The <a href=\""
            + "https://github.com/google/protobuf/search?q=%22message+FileDescriptorSet%22+path%3A%2Fsrc"
            + "\">FileDescriptorSet</a> of the direct sources. "
            + "If no srcs, contains an empty file.",
    structField = true
  )
  public FileT directDescriptorSet();

  @SkylarkCallable(
    name = "transitive_descriptor_sets",
    doc =
        "A set of <a href=\""
            + "https://github.com/google/protobuf/search?q=%22message+FileDescriptorSet%22+path%3A%2Fsrc"
            + "\">FileDescriptorSet</a> files of all dependent proto_library rules, "
            + "and this one's. "
            + "This is not the same as passing --include_imports to proto-compiler. "
            + "Will be empty if no dependencies.",
    structField = true
  )
  public NestedSet<FileT> transitiveDescriptorSets();

  @SkylarkCallable(
      name = "transitive_proto_path",
      doc = "A set of proto source roots collected from the transitive closure of this rule.",
      structField = true
  )
  public NestedSet<String> getTransitiveProtoPathFlags();
}