get_xcode_version.sh

#!/bin/bash
set -o pipefail
set -e
ROOT_PATH=`dirname "${0}"`/..
XCODE_APPS_FINDER=$(mdfind "kMDItemCFBundleIdentifier == 'com.apple.dt.Xcode'")
XCODE_APPS_FALLBACK=$(find /Applications -iname 'Xcode*.app' -maxdepth 1)
XCODE_APPS=$(echo -e "$XCODE_APPS_FINDER\n$XCODE_APPS_FALLBACK" | sort | uniq)
PLIST_BUDDY="/usr/libexec/PlistBuddy"
function get_plist_value() {
  "$PLIST_BUDDY" -c "Print :$2" "$1/Contents/Info.plist"
}
function get_build_version() {
  "$PLIST_BUDDY" -c "Print :ProductBuildVersion" "$1/Contents/version.plist"
}
function get_version() {
  APP_NAME=$(get_plist_value "$1" "CFBundleName")
  if [[ "$APP_NAME" == "Xcode" ]]; then
    echo $(get_plist_value "$1" "CFBundleShortVersionString")
  else
    echo ""
  fi
}
function get_build() {
  APP_NAME=$(get_plist_value "$1" "CFBundleName")
  if [[ "$APP_NAME" == "Xcode" ]]; then
    echo $(get_build_version "$1")
  else
    echo ""
  fi
}
for APP in $XCODE_APPS; do
  APP_VERSION=$(get_version $APP)
  if [ $1 = $APP_VERSION ]; then
    echo $(get_build $APP)
    exit 0
  fi
done
echo "Failed to find version $1. Available versions: " 1>&2
for APP in $XCODE_APPS; do
  APP_VERSION=$(get_version $APP)
  echo "$APP $APP_VERSION" 1>&2
done
exit 1