Add manifest-like config file for source/sprite destination/output mapping

[eshiota]

While the default behavior solves most of the problems, I have the following situation:

• I have to generate sprites for multiple skins, plus a common sprite for all skins
• I have to follow a very specific directory structure

So, given a tree like this:

myproject/
  static/
    bin/
      img/
        icons/
        skins/
          [skin name]/
            icons/
    src/
      scss-components/
        base/
          skins/
            [skin name]/

and skins like "blue" and "red", I'd like to, in a single run, be able to generate an output like this:

myproject/static/bin/img/icons.png
myproject/static/bin/img/blue/icons.png
myproject/static/bin/img/red/icons.png
myproject/static/src/scss-components/base/_icons.scss
myproject/static/src/scss-components/skins/blue/_icons.scss
myproject/static/src/scss-components/skins/red/_icons.scss

I guess the easiest (and saner) way to do that would be using a manifest file, like:

{
  'sprites' : [
    {
      'src' : "myproject/static/bin/img/icons",
      'sprite_dest' : "myproject/static/bin/img",
      'stylesheet_dest' : "myproject/static/src/scss-components/base"
    }
  ]
}

[lucasmazza]

I had some thoughts of implementing this, but with either YAML or Ruby instead of JSON for readability, but the complexity of supporting this has been a downer for me to write this down. What we (and by we I mean @rafaelfranca) did once was wrapping up several spriteful calls into a bash script that generated each sprite with a different command and different options to match the desired file structure. There is the obvious performance hit for the multiple ruby processes but so far has been quite acceptable.

Does this might sound like a solution for your scenario?

[eshiota]

@lucasmazza Yeah, that's what I've been doing until now. Just wanted to know if you had any plans of implementing a neater solution. :cat:

[lucasmazza]

Yeah, I want to add some kind of support for multiple configurations, but it's not that high on my todo list :runner: