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cake.coffee

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cake is a simplified version of Make (Rake, Jake) for CoffeeScript. You define tasks with names and descriptions in a Cakefile, and can call them from the command line, or invoke them from other tasks.

Running cake with no arguments will print out a list of all the tasks in the current directory's Cakefile.

 
             		           
                               
                            
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External dependencies.
             		                            
fs           = require 'fs'
path         = require 'path'
helpers      = require('./helpers').helpers
optparse     = require './optparse'
CoffeeScript = require './coffee-script'
             		           
                               
                            
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Keep track of the list of defined tasks, the accepted options, and so on.
             		                            
tasks     = {}
options   = {}
switches  = []
oparse    = null
             		           
                               
                            
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Mixin the top-level Cake functions for Cakefiles to use directly.
             		                            
helpers.extend global,
             		           
                               
                            
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Define a Cake task with a short name, an optional sentence description,
and the function to run as the action itself.
             		                            
  task: (name, description, action) ->
    [action, description] = [description, action] unless action
    tasks[name] = {name, description, action}
             		           
                               
                            
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Define an option that the Cakefile accepts. The parsed options hash,
containing all of the command-line options passed, will be made available
as the first argument to the action.
             		                            
  option: (letter, flag, description) ->
    switches.push [letter, flag, description]
             		           
                               
                            
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Invoke another task in the current Cakefile.
             		                            
  invoke: (name) ->
    missingTask name unless tasks[name]
    tasks[name].action options
             		           
                               
                            
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Run cake. Executes all of the tasks you pass, in order. Note that Node's
asynchrony may cause tasks to execute in a different order than you'd expect.
If no tasks are passed, print the help screen.
             		                            
exports.run = ->
  path.exists 'Cakefile', (exists) ->
    throw new Error("Cakefile not found in #{process.cwd()}") unless exists
    args = process.argv[2...process.argv.length]
    CoffeeScript.run fs.readFileSync('Cakefile').toString(), fileName: 'Cakefile'
    oparse = new optparse.OptionParser switches
    return printTasks() unless args.length
    options = oparse.parse(args)
    invoke arg for arg in options.arguments
             		           
                               
                            
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Display the list of Cake tasks in a format similar to rake -T
             		                            
printTasks = ->
  puts ''
  for all name, task of tasks
    spaces = 20 - name.length
    spaces = if spaces > 0 then Array(spaces + 1).join(' ') else ''
    desc   = if task.description then "# #{task.description}" else ''
    puts "cake #{name}#{spaces} #{desc}"
  puts oparse.help() if switches.length
             		           
                               
                            
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Print an error and exit when attempting to all an undefined task.
             		                            
missingTask = (task) ->
  puts "No such task: \"#{task}\""
  process.exit 1