Freeze WebKit frameworks for the specific application.

freeze_webkit_for_app.sh

#!/bin/sh

if [ "$1" = "-h" -o "$1" = "--help" ]; then
  echo "Usage: freeze_webkit_for_app.sh [path]"
  echo "ARGUMENTS"
  echo "    path             Path to the application."
  echo "OPTIONS"
  echo "    APPLICATION_PATH Path to the application."
  echo "    WEBKIT_REVISION  Revision of WebKit framework nightly build."
  exit 1
fi

if [ -z "$WEBKIT_REVISION" ]; then
  # Doesn't have any meanings, This is the latest version of WebKit nightly build which supports 10.6 to 10.8.
  WEBKIT_REVISION="129982"
fi

if [ ! -z "$1" ]; then
  APPLICATION_PATH=$1
fi
if [ -z "$APPLICATION_PATH" ]; then
  echo "Please specify the application."
  exit 1
fi

contents_path="$APPLICATION_PATH/Contents"
info_plist_path="$contents_path/Info.plist"
if [ ! -f "$info_plist_path" ]; then
  echo "$APPLICATION_PATH doesn't have Info.plist."
  exit 1
fi

executable_name=`defaults read "$info_plist_path" CFBundleExecutable`
executable_path="$contents_path/MacOS/$executable_name"
if [ ! -f "$executable_path" ]; then
  echo "$APPLICATION_PATH is not valid application path."
  exit 1
fi

FRAMEWORKS="WebKit.framework WebCore.framework JavaScriptCore.framework"

frameworks_path="$contents_path/Frameworks"
for framework in $FRAMEWORKS; do
  if [ -e "$frameworks_path/$framework" ]; then
    echo "$framework is already used in $frameworks_path."
    exit 1
  fi
done

WORKING_PATH=/tmp/freeze_webkit_for_app

mkdir -p "$WORKING_PATH"

echo "Download WebKit nightly revision $WEBKIT_REVISION..."

webkit_dmg_path="$WORKING_PATH/webkit.dmg"
if [ ! -f "$webkit_dmg_path" ]; then
  curl -o "$webkit_dmg_path" "http://builds.nightly.webkit.org/files/trunk/mac/WebKit-SVN-r$WEBKIT_REVISION.dmg"
fi

echo "Mount WebKit.dmg..."

webkit_volume_path=`hdiutil attach "$webkit_dmg_path"|awk '$2 == "Apple_HFS" {print $3}'`
if [ -z "$webkit_volume_path" ]; then
  echo "Fail to mount WebKit.dmg."
  exit 1
fi

macos_product_version=`sw_vers -productVersion|awk -F '.' '{print $1"."$2}'`
webkit_frameworks_path="$webkit_volume_path/WebKit.app/Contents/Frameworks/$macos_product_version"
if [ ! -e "$webkit_frameworks_path" ]; then
  echo "Couldn't find WebKit frameworks $webkit_frameworks_path in WebKit.dmg."
  exit 1
fi

echo "Prepare frameworks..."

for framework in $FRAMEWORKS; do
  if [ ! -e "$WORKING_PATH/$framework" ]; then
    cp -Rp "$webkit_frameworks_path/$framework" "$WORKING_PATH/"
  fi
done

hdiutil detach "$webkit_volume_path"

rewrite_library_path() {
  $2 install_name_tool -change \
    "/System/Library/Frameworks/WebKit.framework/Versions/A/WebKit" \
    "@executable_path/../Frameworks/WebKit.framework/Versions/A/WebKit" \
    "$1"
  $2 install_name_tool -change \
    "/System/Library/Frameworks/WebKit.framework/Versions/A/Frameworks/WebCore.framework/Versions/A/WebCore" \
    "@executable_path/../Frameworks/WebCore.framework/Versions/A/WebCore" \
    "$1"
  $2 install_name_tool -change \
    "/System/Library/Frameworks/JavaScriptCore.framework/Versions/A/JavaScriptCore" \
    "@executable_path/../Frameworks/JavaScriptCore.framework/Versions/A/JavaScriptCore" \
    "$1"
}

for framework in $FRAMEWORKS; do
  framework_name=`basename $framework .framework`
  rewrite_library_path "$WORKING_PATH/$framework/Versions/A/$framework_name"
done

echo "Install frameworks..."

# FIXME this sudo hack is not so good implementation.
if [ ! -w "$contents_path" ]; then
  SUDO=sudo
fi

$SUDO mkdir -p "$frameworks_path"

for framework in $FRAMEWORKS; do
  if [ ! -e "$frameworks_path/$framework" ]; then
    $SUDO cp -Rp "$WORKING_PATH/$framework" "$frameworks_path/"
  fi
done

$SUDO cp -Rp "$executable_path" "$executable_path.original"
rewrite_library_path "$executable_path" $SUDO

rm -rf "$WORKING_PATH"

echo "Done."

Good point, fixed.