Add a resource parsing action.

Part of 3 proposed new actions:
- parsing action
- merging action
- validating action

Dependencies (directData and transitiveData)
expect the symbol files. If the merge action
produces the symbol files, then each merge
action depends on each other. Instead, produce
it in an action with just source resources as
prereqs to allow more parallelism.

Technically, we don't need a manifest as part
of the parameters. I debated about whether
to introduce a basic version of
UnvalidatedAndroidData or not.

--
MOS_MIGRATED_REVID=128599714

1 files changed, 81 insertions, 0 deletions

diff --git a/src/tools/android/java/com/google/devtools/build/android/AndroidResourceParsingAction.java b/src/tools/android/java/com/google/devtools/build/android/AndroidResourceParsingAction.java
new file mode 100644
index 0000000000..e48440db48
--- /dev/null
+++ b/src/tools/android/java/com/google/devtools/build/android/AndroidResourceParsingAction.java
@@ -0,0 +1,81 @@
+// Copyright 2016 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.android;
+
+import com.google.common.base.Preconditions;
+import com.google.common.base.Stopwatch;
+import com.google.common.collect.ImmutableList;
+import com.google.devtools.build.android.Converters.PathConverter;
+import com.google.devtools.build.android.Converters.UnvalidatedAndroidDirectoriesConverter;
+import com.google.devtools.common.options.Option;
+import com.google.devtools.common.options.OptionsBase;
+import com.google.devtools.common.options.OptionsParser;
+import java.nio.file.Path;
+import java.util.concurrent.TimeUnit;
+import java.util.logging.Logger;
+
+/**
+ * Parses android resource XML files from a directory and serializes the results to a protobuf.
+ * Other actions that depend on the same resource directory can then load the data from a single
+ * protobuf instead of reparsing multiple tiny XML files from source (proto loading is faster).
+ */
+public class AndroidResourceParsingAction {
+
+  private static final Logger logger =
+      Logger.getLogger(AndroidResourceParsingAction.class.getName());
+
+  /**
+   * Flag specifications for this action.
+   */
+  public static final class Options extends OptionsBase {
+
+    @Option(name = "primaryData",
+        defaultValue = "null",
+        converter = UnvalidatedAndroidDirectoriesConverter.class,
+        category = "input",
+        help = "The resource and asset directories to parse and summarize in a symbols file."
+            + " The expected format is resources[#resources]:assets[#assets]")
+    public UnvalidatedAndroidDirectories primaryData;
+
+    @Option(name = "output",
+        defaultValue = "null",
+        converter = PathConverter.class,
+        category = "output",
+        help = "Path to write the output protobuf.")
+    public Path output;
+  }
+
+  public static void main(String[] args) throws Exception {
+    OptionsParser optionsParser = OptionsParser.newOptionsParser(Options.class);
+    optionsParser.parseAndExitUponError(args);
+    Options options = optionsParser.getOptions(Options.class);
+
+    Preconditions.checkNotNull(options.primaryData);
+    Preconditions.checkNotNull(options.output);
+
+    final Stopwatch timer = Stopwatch.createStarted();
+    ParsedAndroidData parsedPrimary = ParsedAndroidData.from(options.primaryData);
+    logger.fine(String.format("Walked XML tree at %dms", timer.elapsed(TimeUnit.MILLISECONDS)));
+    UnwrittenMergedAndroidData unwrittenData = UnwrittenMergedAndroidData.of(
+        null,
+        parsedPrimary,
+        ParsedAndroidData.from(ImmutableList.<DependencyAndroidData>of()));
+    AndroidDataSerializer serializer = AndroidDataSerializer.create();
+    unwrittenData.serializeTo(serializer);
+    serializer.flushTo(options.output);
+    logger.fine(String.format(
+        "Finished parse + serialize in %dms", timer.elapsed(TimeUnit.MILLISECONDS)));
+  }
+
+}