Recursively pre-compress (gzip) CSS/JavaScript/webfont assets for use Nginx and its HttpGzipStaticModule module.

precompresscssjswebfont.sh

#!/bin/bash -e

function compressResource {

	gzip --best "$1" >"$1.gz"
	touch --no-create --reference="$1" "$1.gz"

	echo "Compressed: $1 > $1.gz"
}


# fetch list of websites
IFS=$'\n'
for appDir in $(find /var/www/* -maxdepth 0)
do
	# fetch all existing gzipped CSS/JavaScript/webfont files and remove files that do not have a base uncompressed file
	for compressFile in $(find "$appDir" -type f \( -name "*.css.gz" -or -name "*.js.gz" -or -name "*.eot.gz" -or -name "*.svg.gz" -or -name "*.ttf.gz" \))
	do
		if [[ ! -f ${compressFile%.gz} ]]; then
			# remove orphan gzipped file
			rm "$compressFile"
			echo "Removed: $compressFile"
		fi
	done

	# fetch all source CSS/JS/webfont files - excluding *.src.* variants (pre-minified CSS/JavaScript)
	# gzip each file and give timestamp identical to that of the uncompressed source file
	for sourceFile in $(find "$appDir" -type f \( -name "*.css" -or -name "*.js" -or -name "*.eot" -or -name "*.svg" -or -name "*.ttf" \) \( ! -name "*.src.css" -and ! -name "*.src.js" \))
	do
		if [[ -f "$sourceFile.gz" ]]; then
			# only re-gzip if source file is different in timestamp to the existing gzip file
			if [[ ($sourceFile -nt "$sourceFile.gz") || ($sourceFile -ot "$sourceFile.gz") ]]; then
				compressResource "$sourceFile"
			fi
		else
			compressResource "$sourceFile"
		fi
	done
done