Updating Xcode project version number from git

gistfile1.sh

# Use git describe as build number

echo "Updating version/build number from git..."
plist=${PROJECT_DIR}/${INFOPLIST_FILE}

# Get build/version number
versionnum=`git describe --tags | awk '{split($0,a,"-"); print a[1]}'`
buildnum=`git describe --tags`

if [[ "${versionnum}" == "" ]]; then
echo "No version number from git"
exit 2
fi

if [[ "${buildnum}" == "" ]]; then
echo "No build number from git"
exit 2
fi

/usr/libexec/Plistbuddy -c "Set CFBundleShortVersionString $versionnum" "${plist}"
echo "Updated version number to $versionnum"

/usr/libexec/Plistbuddy -c "Set CFBundleVersion $buildnum" "${plist}"
echo "Updated build number to $buildnum"