Update Google Closure Tools

update-google-closure-tools.sh

#!/bin/bash

GOOG_LIB_DIR=/usr/lib/google/closure
TMP_DIR=/tmp/update-google-closure-tools

if [ "$UID" -ne 0 ]; then
   echo "This script must be run as root" 1>&2
   exit 1
fi

if [[ ! -d $GOOG_LIB_DIR ]]; then
   mkdir -p $GOOG_LIB_DIR
fi

if [[ ! -d $TMP_DIR ]]; then
   mkdir -p $TMP_DIR
fi

# download and copy the compiler
wget -O $TMP_DIR/compiler.zip \
http://dl.google.com/closure-compiler/compiler-latest.zip

if [[ ! -f $TMP_DIR/compiler.zip ]]; then
   echo "Failed to download compiler archive"
   exit 1
fi

unzip $TMP_DIR/compiler.zip -d $TMP_DIR

if [[ ! -f $TMP_DIR/compiler.jar ]]; then
   echo "Something went wrong; the compiler.jar file could not be found"
   exit 1
fi

mv $TMP_DIR/compiler.jar $GOOG_LIB_DIR/compiler.jar
chown root:root $GOOG_LIB_DIR/compiler.jar
chmod 664 $GOOG_LIB_DIR/compiler.jar

# cleanup
rm -rf $TMP_DIR


if [[ -d $GOOG_LIB_DIR/library && -d $GOOG_LIB_DIR/library/.git ]]; then
   echo 'updating closure-library git repo' 
   git --git-dir=$GOOG_LIB_DIR/library/.git --work-tree=$GOOG_LIB_DIR/library/ pull
else 
   echo 'cloing closure-library git repo' 
   git clone \
   --depth=1 \
   https://github.com/google/closure-library $GOOG_LIB_DIR/library
fi