#!/usr/bin/env bash

# Echo some information to STDOUT as well as show a growl notification if available
function notify {
	if [[ -f /usr/local/bin/growlnotify ]]; then
		echo $1 | /usr/local/bin/growlnotify "Updating WebKit"
	fi
	echo $1
}

# Compare revisions, bailing if we already have the latest version
REVISION=`curl -s http://nightly.webkit.org/ | grep ".dmg" | grep -E -o "r[0-9]+" | head -1`
OLDREVISION=`cat /Applications/WebKit.app/Contents/Resources/VERSION`
if [[ $REVISION == "r$OLDREVISION" ]]; then
	notify "Same revision"
	exit
fi

# Mount the disk image remotely, saving on cleanup later.
notify "Mounting remote disk image for WebKit revision $REVISION..."
hdiutil mount "http://builds.nightly.webkit.org/files/trunk/mac/WebKit-SVN-$REVISION.dmg" -quiet

# Delete the old version
if [[ -d /Applications/WebKit.app ]]; then
	rm -r /Applications/WebKit.app
fi

# Copy the new WebKit into Applications
notify "Copying WebKit.app to /Applications/"
cp -R /Volumes/WebKit/WebKit.app /Applications/

# touch WebKit.app in order to update it's icon (sometimes it appears as a blank app until launched)
touch /Applications/WebKit.app

# Unmount the remote disk image
notify "Unmounting disk image"
hdiutil unmount /Volumes/WebKit -quiet