Dynamic path expansion does not appear to be working.

[kitsunde]

Path expansion seem to pickup the name src and places the file in the running directory.

'zopfli': {
  'images': {
    files: {
      'src': ['build/img/cards/*'],
      'dest': 'build/img/cards/compressed',
      'expand': true,
      'ext': '.png'
    }
  }
},

Gives

Running "zopfli:images" (zopfli) task
File src created.
Original: 122158 bytes.
Compressed: 121931 bytes.
File src created.
Original: 108372 bytes.
Compressed: 108142 bytes.
File src created.
Original: 114956 bytes.
Compressed: 114729 bytes.
[...]

This still works as intended though:

'zopfli': {
  'images': {
    files: {
      'build/img/cards/compressed/479.png': 'build/img/cards/479.png'
    }
  }
},

[yumyo]

same here

[yumyo]

Appears to be a problem of sintax. This simple example is now working for me:

    zopfli: {
        options: {
            'iterations': 50,
        },
        files: {
            'expand': true,
            'cwd': 'assets/live/',
            'src': ['*.*'],
            'dest': 'assets/live/',
            'ext': '.gz'
        }
    },

[yumyo]

a step forward now (at least for me) is taking advantage of the rename funcrtion instead of the ext

so this:

rename  : function (dest, src) {
      var folder    = src.substring(0, src.lastIndexOf('/'));
      var filename  = src.substring(src.lastIndexOf('/'), src.length);
      return dest + folder + filename + '.gz';
    }

give me 31f01c2d.scripts-mob.min.js.gz from 31f01c2d.scripts-mob.min.js which is exactly what I need since I'm using grunt-wp-assets to version my assets but it could easily solve any similar need.

This closes #13

[radkodinev]

/ping @yumyo

You could just use the simpler 'ext': function (ext) { return ext + '.gz'; }.
More about it at gruntjs/grunt-contrib-compress#91 (comment).

Also there's also the extDot (see relevant Grunt docs) since Grunt 0.4.3 which may be useful too.