Compressor using YUI Compressor

compressor.sh

#!/bin/bash

# The files to ignore are already minified.

css_files_to_ignore=(
    "jquery.colorbox-min.css"
);

js_files_to_ignore=(
    "jquery.colorbox-min.js"
);

base_folder="$(git rev-parse --show-toplevel)"
yuicompressor_path=../yui/yui-2.4.2.jar

function process_assets() {
    extension=$1
    files_minified=0

    for infile in $(echo "$base_folder/$extension/*.$extension")
    do
        [[ -f $infile ]] || continue

        filename=${infile##*/}

        # If the filename starts with an underscore, that means that the file is a
        # minified file that was previously generated.

        [[ ${filename:0:1} != "_" ]] || continue

        ignore_this_file=false

        files_to_ignore=$extension"_files_to_ignore"

        for i in $(eval echo \${$files_to_ignore[@]})
        do
            if [[ $i == $filename ]]; then
                ignore_this_file=true
                break
            fi
        done

        if [ $ignore_this_file == false ]; then
            minified_file="$base_folder/$extension/_$filename"

            if [ ! -f "$minified_file" ] || test $infile -nt $minified_file; then
                java -jar $yuicompressor_path "$infile" -o "$minified_file"
                ((files_minified++))
            fi
        fi
    done

    if [ $extension == "css" ]; then
        file_type=CSS
    else
        file_type=JavaScript
    fi

    echo -n "$files_minified $file_type file"

    if [ "$files_minified" == "1" ]; then
        echo -n " was"
    else
        echo -n "s were"
    fi

    echo " minified"
}

if [ -f $yuicompressor_path ]; then
    process_assets css
    process_assets js
else
    echo "YUI Compressor was not found. Aborting."
    exit 1
fi