DocPad: Minify your assets with Grunt

README.md

DocPad: Minify your assets with Grunt

The following will minify your assets with grunt each time a generation write completes.

Installation

1. Install Dependencies

   npm install grunt safeps --save
   npm install grunt-cli -g 

2. Create your website's grunt file to specify what we should minify. Guide here.

3. Add the following to your docpad configuration file

   events:
   	# Write After
   	# Used to minify our assets with grunt
   	writeAfter: (opts,next) ->
   		# Prepare
   		safeps = require('safeps')
   		pathUtil = require('path')
   		docpad = @docpad
   		rootPath = docpad.getConfig().rootPath
   		gruntPath = pathUtil.join(rootPath, 'node_modules', '.bin', 'grunt')
   
   		# Perform the grunt `min` task
   		# https://github.com/gruntjs/grunt/blob/0.3-stable/docs/task_min.md
   		command = [gruntPath, 'min']
   		
   		# Execute
   		safeps.spawn(command, {cwd:rootPath,output:true}, next)
   
   		# Chain
   		@

Working Example

Check out Luke Arrys's HTML5 Boilerplate + Grunt Skeleton

I have some trouble with the spawn function. I tried this example and the extended version from this docpad skeleton, but I get the same error every time:

error: An error occured:
Error: spawn ENOENT
    at errnoException (child_process.js:980:11)
    at Process.ChildProcess._handle.onexit (child_process.js:771:34)
    → [2013-06-01 14:03:27.698] [C:\Users\USERNAME\AppData\Roaming\npm\node_modules\docpad\out\lib\docpad.js] [DocPad.log]

I have the grunt-cli installed.
I use the following versions:
grunt - 0.4.1
bal-util - 2.1.0

Could anyone go into details about (2) please? I don't get what I have to do with the grunt file. I suppose it's the file which is in /node_modules/grunt/Gruntfile.js ? There's lots of stuff in there, so what do I have to add/adjust to minify my HTML, CSS and JS?
Sorry for the newbie question... Thanks a lot!

Try now

The above docs as is don't work when doing a new install of grunt:

npm install grunt-cli -g results in grunt being available globally on your system. This means it isn't available at the constructed path `node_modules/.bin/grunt'

Easiest imo is to do the following (especially notice: save:false):

events:
    # Write After
    # Used to minify our assets with grunt
    writeAfter: (opts,next) ->
        # Prepare
        safeps = require('safeps')
        pathUtil = require('path')
        docpad = @docpad
        rootPath = docpad.getConfig().rootPath

        # Perform the grunt `min` task
        # https://github.com/gruntjs/grunt/blob/0.3-stable/docs/task_min.md
        command = [grunt, 'min']

        # Execute
        safeps.spawn(command, {save:false,output:true}, next)

        # Chain
        @

Could this be a plugin (docpad-plugin-grunt) with the default command = [gruntPath, 'default'] ?

Here it is @Hypercubed: https://github.com/robloach/docpad-plugin-grunt

I am unable to get this to work so far. I get the following error:

Aborted due to warnings.
error: Something went wrong with the action
error: An error occured:
Error: exited with a non-zero status code
at ChildProcess. (/Users/ethan/Sites/codecuts/node_modules/safeps/out/lib/safeps.js:165:23)
at ChildProcess.emit (events.js:98:17)
at maybeClose (child_process.js:756:16)
at Socket. (child_process.js:969:11)
at Socket.emit (events.js:95:17)
at Pipe.close (net.js:465:12)

Do I need to install something, or as is suggested here call loadNpmTasks?

I was only able to get this working with the grunt-contrib-uglify package, like so:

First by installing the package:

npm install grunt-contrib-uglify  # run in project root path of course

Then by adding the following to my Gruntfile.js:

grunt.initConfig({
    uglify: {
        my_target: {
            files: {
                'out/scripts/all.js': ['out/scripts/all.js']
            }
        }
    }
});
grunt.loadNpmTasks('grunt-contrib-uglify');

Then setting up the following in docpad.coffee:

                       events:
            # Write after
            # Used to minir our assets with grunt
            writeAfter: (opts, next) ->
                # Prepare
                safeps = require('safeps')
                pathUtil = require('path')
                docpad = @docpad

                # Perform the uglify js min task
                uglify = ['grunt', 'uglify']

                # Execute
                safeps.spawn(uglify, {safe:false,output:true},next)

                # Chain
                @