Open-source command-line options specific to protocol buffer.

--
MOS_MIGRATED_REVID=109897602

src/main/java/com/google/devtools/build/lib/BUILD

@@ -612,6 +612,7 @@ java_library(
         ":util",
         ":vfs",
         "//src/main/java/com/google/devtools/build/lib/actions",
+        "//src/main/java/com/google/devtools/common/options",
         "//third_party:auto_value",
         "//third_party:guava",
         "//third_party:jsr305",

src/main/java/com/google/devtools/build/lib/rules/proto/ProtoConfiguration.java

@@ -0,0 +1,75 @@
+// Copyright 2015 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.rules.proto;
+
+import com.google.common.collect.ImmutableSet;
+import com.google.devtools.build.lib.analysis.config.BuildConfiguration.Fragment;
+import com.google.devtools.build.lib.analysis.config.BuildOptions;
+import com.google.devtools.build.lib.analysis.config.ConfigurationEnvironment;
+import com.google.devtools.build.lib.analysis.config.ConfigurationFragmentFactory;
+import com.google.devtools.build.lib.analysis.config.FragmentOptions;
+import com.google.devtools.build.lib.analysis.config.InvalidConfigurationException;
+import com.google.devtools.common.options.Option;
+
+import java.util.List;
+
+/**
+ * Configuration for Protocol Buffer Libraries.
+ */
+public class ProtoConfiguration extends Fragment {
+
+  /**
+   * Command line options.
+   */
+  public static class Options extends FragmentOptions {
+    @Option(name = "protocopt",
+        allowMultiple = true,
+        defaultValue = "",
+        category = "flags",
+        help = "Additional options to pass to the protobuf compiler.")
+    public List<String> protocOpts;
+  }
+
+  /**
+   * Loader class for proto.
+   */
+  public static class Loader implements ConfigurationFragmentFactory {
+    @Override
+    public Fragment create(ConfigurationEnvironment env, BuildOptions buildOptions)
+        throws InvalidConfigurationException {
+      return new ProtoConfiguration(buildOptions.get(Options.class));
+    }
+
+    @Override
+    public Class<? extends Fragment> creates() {
+      return ProtoConfiguration.class;
+    }
+
+    @Override
+    public ImmutableSet<Class<? extends FragmentOptions>> requiredOptions() {
+      return ImmutableSet.<Class<? extends FragmentOptions>>of(Options.class);
+    }
+  }
+
+  private final Options options;
+
+  public ProtoConfiguration(Options options) {
+    this.options = options;
+  }
+
+  public List<String> protocOpts() {
+    return options.protocOpts;
+  }
+}