Compress css + js files

compress.bash

compress_web_files() {
	
	JS_OUTPUT_FILE=$1
	CSS_OUTPUT_FILE=$2
	JAVASCRIPT_FILES=$3
	CSS_FILES=$4
	
	generate_js_include() {
		echo "document.write('<script src=\"/includes/$1\" type=\"text/javascript\" charset=\"utf-8\"></script>');"
	}

	generate_css_include() {
		echo "@import \"/includes/$1\";"
	}

	if [[ "$USER" == "Mike" ]]; then
		DEVELOPMENT=1
	else
		DEVELOPMENT=0
	fi

	if [[ -e $HOME/scripts/yuicompressor.jar ]]; then
		CSS_OPTIMIZER="$HOME/scripts/cssoptimizer"
		JS_OPTIMIZER="$HOME/scripts/yuicompressor.jar"
	else
		CSS_OPTIMIZER='cssoptimizer'
		JS_OPTIMIZER='/usr/bin/yuicompressor.jar'
	fi

	if [ $DEVELOPMENT == 1 ]; then
		> $JS_OUTPUT_FILE
	
		for file in ${JAVASCRIPT_FILES[@]}; do
			generate_js_include "$file" >> $JS_OUTPUT_FILE
		done
	
		> $CSS_OUTPUT_FILE
	
		for file in ${CSS_FILES[@]}; do
			generate_css_include $file >> $CSS_OUTPUT_FILE
		done
	
		# we dont want the server trying to serve the wrong data
	
		if [[ -e "$CSS_OUTPUT_FILE.gz" ]]; then
			rm "$CSS_OUTPUT_FILE.gz"
		fi
	
		if [[ -e "$JS_OUTPUT_FILE.gz" ]]; then
			rm "$JS_OUTPUT_FILE.gz"
		fi
	
		return 0
	fi

	# Darwin is assuming os x

	if [[ `uname` == "Darwin" ]]; then
		tempFile=`mktemp -t webcompress.xxx`
	else
		# mktemp on server runs differently than the os x version
		tempFile=`mktemp`
	fi

	# Compress CSS

	for file in ${CSS_FILES[@]}; do
		# count /'s.. if we are father down in the directory replace ../../../ with ../
		if [[ `echo "$file" | perl -ne 'while(/\//g){++$count}; print "$count\n"'` > 2 ]]; then
			cat $file | sed 's/\.\.\/\.\.\/\.\.\//..\/..\//g' >> $tempFile
		else
			cat $file >> $tempFile
		fi
	done

	"$CSS_OPTIMIZER" -lo $tempFile > $CSS_OUTPUT_FILE

	# the IE file needs to be compressed
	# whitespace causes issues with IE
	# we have to do this round-about compression b/c of a bug in cssoptimizer
	cp 'css/lib/ie.css' 'css/lib/ie2.css'
	"$CSS_OPTIMIZER" -lo 'css/lib/ie2.css' > 'css/lib/ie.css'

	# Compress JS

	> $tempFile
	
	for file in ${JAVASCRIPT_FILES[@]}; do
		cat $file >> $tempFile
	done

	java -jar "$JS_OPTIMIZER" --type js "$tempFile" > "$JS_OUTPUT_FILE"

	# gzip compress, but keep the original core.css in addition to the newly created core.css.gz

	gzip -fc "$JS_OUTPUT_FILE" > "${JS_OUTPUT_FILE}.gz"
	gzip -fc "$CSS_OUTPUT_FILE" > "${CSS_OUTPUT_FILE}.gz"
	
	return 0
}