Creates a Gruntfile.js, uglifying all .js files in a given dir. All <file>.js will be uglified and saved as <file>.min.js, in the same dir

create-gruntfile.sh

#!/bin/bash 
#
# Creates a Gruntfile.js, uglifying all .js files in a given dir
# All <file>.js will be uglified and saved as <file>.min.js, in the same dir
# 
# EXECUTE THIS SCRIPT IN THE ROOT OF YOUR PROJECT, WHERE THE Gruntfile.js SHALL BE PLACED


# Path to JS dir, from where the files will be uglified
JS_DIR="public/js"


IFS='' read -r -d '' CONTENT <<'EOF'
module.exports = function( grunt )
{
	grunt.initConfig(
	{
    	uglify : {
    		options : {
    			mangle : false
      		},

      		targets : {
        		files : {
_files_
        		}
      		}
    	} // uglify
    	
	});

	// Grunt Plugins
 	grunt.loadNpmTasks( 'grunt-contrib-uglify' );


 	// register default task
 	grunt.registerTask( 'default', [ 'uglify' ] );
};
EOF



files=$(find $JS_DIR -maxdepth 1 -type f | egrep '\.js$' | grep -v 'min\.js')

filesString=""
for file in $files
do
	uglyfiedFile=${file/.js/.min.js}
	filesString=$filesString"\t\t\t\t'$uglyfiedFile' : [ '${file}' ],\n"
done

len=${#filesString}
filesString=${filesString:0:len-3}

CONTENT=${CONTENT/_files_/$filesString}

echo -e "$CONTENT" > Gruntfile.js

echo "OK"