Package Setup YAML file. I'm using this for a new script I made to make making packages for Craftitude easier. I hope... This example shows a setup for the "Minekawaii" mod.

minekawaii.lua

-- Instructions file for Minekawaii

-- Variables:
--   TARGETFOLDER => The target folder where to install the package. In this case, this will be "mods".
--   TARGETFILE => The target file name under which to install the package. In this case, this will be "minekawaii.jar".
--   URL => The URL from which to download the archive. This is the ZIP/JAR file to the mod online.

function Install()
  GetResolver("archive", {
		input = GetResolver("download", { url = "$(URL)" })
	}):InjectAllTo("$(TARGETFOLDER)/$(TARGETFILE)")
end

function Uninstall()
	DeleteFile("$(TARGETFOLDER)/$(TARGETFILE)")
end

minekawaii.yml

# Metadata file
# for Minekawaii

# Package name
Name: Minekawaii

# Package description
Description: >
  Minekawaii is a simple mod for all of your favorite Japanese snacks,
  in Minecraft!

# Package homepage
Homepage: http://www.minecraftforum.net/topic/1736987-151-minekawaii-120-japanese-food-for-minecraft/

# Package maintainers
Maintainers:
- Carl Kittelberger <icedream@modernminas.de>

# Package developers
Developers:
- iNyanny; http://www.minecraftforum.net/user/1065316-inyanny/

# Package license
License:
  Name: Unknown

# Platforms on which this package is available
Platforms:
- all  # Automatically selects all platforms, makes sense for a JAR file
#- windows
#- osx
#- linux

# Dependencies
Dependencies:
- requires minecraft-forge

...

setup.yml

######################
# Package setup file
######################

## Global settings ##
# All settings can be specifically tweaked (overwritten)
# for each new version.
Settings:

  # Where to output generated files
  OutputPath: output/

## Global variables ##
# Variables are used by patterns to replace things.
Variables: []     # [] means empty

# Served packages from here
Packages:

  # Package "minekawaii"
  minekawaii:

    # Package-specific variables
    Variables:
      TARGETFOLDER: mods
      TARGETFILE: minekawaii.jar

    # Lua scripts for later generated instructions file,
    # will be merged in the order specified
    Patterns:
    - minekawaii.lua

    # Metadata to append (can be string = file path or array = inlined metadata)
    Metadata: minekawaii.yml

    # Version list, newest version at top, oldest at bottom
    Versions:

      1.2.0:
        Settings:
          Distributions: [ "1.5.1" ]
        Metadata:
          Date: 2013-03-22T21:31:45
        Variables:
          URL: http://www.appattacknetwork.com/files/upload/files/Minekawaii-1-2-0.zip

      1.0.0:
        Settings:
          Distributions: [ "1.5.1" ]
        Metadata:
          Date: 2013-03-21T23:14:37
        Variables:
          URL: http://www.appattacknetwork.com/files/upload/files/Minekawaii-1-0-0.zip