A script that recurses though asset:pipeline style trees, joins and compresses the result

precompile.sh

#!/bin/sh

# Make the structure
mkdir -p public/assets/javascripts
mkdir -p public/assets/stylesheets
mkdir -p public/assets/images


# Images - handle these first so that the resulting md5 hashed names can be inserted

# JavaScripts
# TODO files with ' in the require
# TODO erb files
# TODO uniq the files

function expand_dir()
{
    if test -d "$1"
    then
        for k in $1/*
        do
            expand_file $k $2 "$3"
        done
    fi
}

# $1 = file name, $2 = base dir, $3 = indent level
function expand_file()
{
    if test -f "$1"
    then
        echo "$1"

        DIR=$(dirname $1)

        REQUIRES=`awk '/^(\/\/=|\*=) *require/ {
            {print $3}
        }' "$1"`

        for j in $REQUIRES
        do
            if test -f "$DIR/$j"
            then
                expand_file "$DIR/$j" $2 "$3  "
            elif test -d "$DIR/$j"
            then
                expand_dir "$DIR/$j" $2 "$3  "
            elif test -f "$2/$j"
            then
                expand_file "$2/$j" $2 "$3  "
            elif test -d "$2/$j"
            then
                expand_dir "$2/$j" $2 "$3  "
            else
                echo "$3  UNKNOWN: $j"
            fi
        done
    fi
}

GRAY="\033[1;30m"
LIGHT_CYAN="\033[1;36m"
CLEAR="\033[0m"

# Primary kick-off
for i in app/assets/javascripts/*
do
    if test -f "$i"
    then
        filename="${i##*/}"
        echo "$GRAY** $filename$CLEAR"

        REFS=$(expand_file $i "app/assets/javascripts")
        for f in $REFS
        do
            cat "$f" >> "./public/assets/javascripts/$filename"
        done
    fi
done
echo "Compressing js"
`java -jar bin/yuicompressor-2.4.7.jar -o '.js.erb$:-min.js' --type css public/assets/javascripts/*.js.erb`

for i in app/assets/stylesheets/*
do
    if test -f "$i"
    then
        filename="${i##*/}"
        echo "$LIGHT_CYAN** $filename$CLEAR"

        REFS=$(expand_file $i "app/assets/stylesheets")
        for f in $REFS
        do
            cat "$f" >> "./public/assets/stylesheets/$filename"
        done
    fi
done

echo "Compressing css"
`java -jar bin/yuicompressor-2.4.7.jar -o '.css.erb$:-min.css' --type css public/assets/stylesheets/*.css.erb`