how somebody compiles a folder of scss files using make and bash

scss.sh

#!/bin/bash

# SCSS include path
BINPATH=`dirname $0`
STATIC_DIR="$BINPATH/../root/static/scss"

# SCSS
function compile_dir {
    SCSS_DIR=$1
    SCSS=scss
    PATH="$(ruby -rubygems -e 'puts Gem.user_dir')/bin:$PATH"
    which $SCSS
    if [[ $? == 1 ]]; then
        # amazon linux/ubuntu
        # i think
        SCSS=/usr/local/bin/scss
        if [[ ! -e "$SCSS" ]]; then
            # centos? idk
            SCSS=/var/lib/gems/1.8/bin/scss
            if [[ ! -e "$SCSS" ]]; then
                echo "scss compiler '$SCSS' not found"
                exit 1
            fi
        fi
    fi
    # compile
    rm -rf .sass-cache
    $SCSS -I "$STATIC_DIR" -t compressed --update "$SCSS_DIR"
}

compile_dir "$STATIC_DIR”