a utility script to pngcrush png files

BUG=150046
TEST=none
NOTRY=true

Review URL: https://chromiumcodereview.appspot.com/11825019

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@176157 0039d316-1c4b-4281-b951-d872f2087c98

build/sanitize-png-files.sh

+#!/bin/bash
+# Copyright (c) 2010 The Chromium Authors. All rights reserved.
+# Use of this source code is governed by a BSD-style license that can be
+# found in the LICENSE file.
+
+ALL_DIRS="
+ash/resources
+ui/resources
+chrome/app/theme
+chrome/browser/resources
+chrome/renderer/resources
+webkit/glue/resources
+remoting/resources
+remoting/webapp
+"
+
+function sanitize_file {
+  tput el
+  echo -ne "$1\r"
+  local file=$1
+  local name=$(basename $file)
+  pngcrush -d $TMP_DIR -brute -reduce -rem text -rem mkBT \
+      -rem mkTS $file > /dev/null
+  mv "$TMP_DIR/$name" "$file"
+}
+
+function sanitize_dir {
+  local dir=$1
+  for f in $(find $dir -name "*.png"); do
+    sanitize_file $f
+  done
+}
+
+if [ ! -e ../.gclient ]; then
+  echo "$0 must be run in src directory"
+  exit 1
+fi
+
+# Make sure we have pngcrush installed.
+dpkg -s pngcrush > /dev/null 2>&1
+if [ "$?" != "0" ]; then
+  read -p "Couldn't fnd pngcrush. Do you want to install? (y/n)"
+  [ "$REPLY" == "y" ] && sudo apt-get install pngcrush
+  [ "$REPLY" == "y" ] || exit
+fi
+
+# Create tmp directory for crushed png file.
+TMP_DIR=$(mktemp -d)
+
+# Make sure we cleanup temp dir
+trap "rm -rf $TMP_DIR" EXIT
+
+# If no arguments passed, sanitize all directories.
+DIRS=$*
+set ${DIRS:=$ALL_DIRS}
+
+for d in $DIRS; do
+  echo "Sanitizing png files in $d"
+  sanitize_dir $d
+  echo
+done
+