Add a crunch_png attribute to android_binary

This allows a user to turn off png crunching during
the final merge (with crunch_png = 0), but it does
not skip nine-patch processing.

RELNOTES: adds crunch_png attribute to android_binary

--
MOS_MIGRATED_REVID=119986498

1 files changed, 50 insertions, 0 deletions

diff --git a/src/tools/android/java/com/google/devtools/build/android/NinePatchOnlyCruncher.java b/src/tools/android/java/com/google/devtools/build/android/NinePatchOnlyCruncher.java
new file mode 100644
index 0000000000..3957ab8c4a
--- /dev/null
+++ b/src/tools/android/java/com/google/devtools/build/android/NinePatchOnlyCruncher.java
@@ -0,0 +1,50 @@
+// 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.io.Files;
+
+import com.android.SdkConstants;
+import com.android.ide.common.internal.AaptCruncher;
+import com.android.ide.common.internal.CommandLineRunner;
+import com.android.ide.common.internal.LoggedErrorException;
+
+import java.io.File;
+import java.io.IOException;
+
+/**
+ * A wrapper around a PNG cruncher that only processes nine-patch PNGs.
+ */
+public class NinePatchOnlyCruncher extends AaptCruncher {
+
+  public NinePatchOnlyCruncher(String aaptLocation, CommandLineRunner commandLineRunner) {
+    super(aaptLocation, commandLineRunner);
+  }
+
+  /**
+   * Runs the cruncher on a single file (or copies the file if no crunching is needed).
+   *
+   * @param from the file to process
+   * @param to the output file
+   */
+  @Override
+  public void crunchPng(File from, File to)
+      throws InterruptedException, LoggedErrorException, IOException {
+    if (from.getPath().endsWith(SdkConstants.DOT_9PNG)) {
+      super.crunchPng(from, to);
+    } else {
+      Files.copy(from, to);
+    }
+  }
+}