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<h1>cake.coffee</h1>
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<p><code>cake</code> is a simplified version of <a href="http://www.gnu.org/software/make/">Make</a>
(<a href="http://rake.rubyforge.org/">Rake</a>, <a href="http://github.com/280north/jake">Jake</a>)
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.</p>
<p>Running <code>cake</code> with no arguments will print out a list of all the tasks in the
current directory’s Cakefile.</p>
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<p>External dependencies.</p>
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<div class="content"><div class='highlight'><pre>fs = <span class="hljs-built_in">require</span> <span class="hljs-string">'fs'</span>
path = <span class="hljs-built_in">require</span> <span class="hljs-string">'path'</span>
helpers = <span class="hljs-built_in">require</span> <span class="hljs-string">'./helpers'</span>
optparse = <span class="hljs-built_in">require</span> <span class="hljs-string">'./optparse'</span>
CoffeeScript = <span class="hljs-built_in">require</span> <span class="hljs-string">'./coffee-script'</span></pre></div></div>
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<p>Register .coffee extension</p>
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<div class="content"><div class='highlight'><pre>CoffeeScript.register()</pre></div></div>
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<p>Keep track of the list of defined tasks, the accepted options, and so on.</p>
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<div class="content"><div class='highlight'><pre>tasks = {}
options = {}
switches = []
oparse = <span class="hljs-literal">null</span></pre></div></div>
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<p>Mixin the top-level Cake functions for Cakefiles to use directly.</p>
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<div class="content"><div class='highlight'><pre>helpers.extend <span class="hljs-built_in">global</span>,</pre></div></div>
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<p>Define a Cake task with a short name, an optional sentence description,
and the function to run as the action itself.</p>
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<div class="content"><div class='highlight'><pre> <span class="hljs-attribute">task</span>: <span class="hljs-function"><span class="hljs-params">(name, description, action)</span> -></span>
[action, description] = [description, action] <span class="hljs-keyword">unless</span> action
tasks[name] = {name, description, action}</pre></div></div>
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<p>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.</p>
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<div class="content"><div class='highlight'><pre> <span class="hljs-attribute">option</span>: <span class="hljs-function"><span class="hljs-params">(letter, flag, description)</span> -></span>
switches.push [letter, flag, description]</pre></div></div>
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<p>Invoke another task in the current Cakefile.</p>
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<div class="content"><div class='highlight'><pre> <span class="hljs-attribute">invoke</span>: <span class="hljs-function"><span class="hljs-params">(name)</span> -></span>
missingTask name <span class="hljs-keyword">unless</span> tasks[name]
tasks[name].action options</pre></div></div>
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<p>Run <code>cake</code>. 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. Keep a reference to the
original directory name, when running Cake tasks from subdirectories.</p>
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<div class="content"><div class='highlight'><pre><span class="hljs-built_in">exports</span>.<span class="hljs-function"><span class="hljs-title">run</span> = -></span>
<span class="hljs-built_in">global</span>.__originalDirname = fs.realpathSync <span class="hljs-string">'.'</span>
process.chdir cakefileDirectory __originalDirname
args = process.argv[<span class="hljs-number">2.</span>.]
CoffeeScript.run fs.readFileSync(<span class="hljs-string">'Cakefile'</span>).toString(), <span class="hljs-attribute">filename</span>: <span class="hljs-string">'Cakefile'</span>
oparse = <span class="hljs-keyword">new</span> optparse.OptionParser switches
<span class="hljs-keyword">return</span> printTasks() <span class="hljs-keyword">unless</span> args.length
<span class="hljs-keyword">try</span>
options = oparse.parse(args)
<span class="hljs-keyword">catch</span> e
<span class="hljs-keyword">return</span> fatalError <span class="hljs-string">"<span class="hljs-subst">#{e}</span>"</span>
invoke arg <span class="hljs-keyword">for</span> arg <span class="hljs-keyword">in</span> options.arguments</pre></div></div>
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<p>Display the list of Cake tasks in a format similar to <code>rake -T</code></p>
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<div class="content"><div class='highlight'><pre><span class="hljs-function"><span class="hljs-title">printTasks</span> = -></span>
relative = path.relative <span class="hljs-keyword">or</span> path.resolve
cakefilePath = path.join relative(__originalDirname, process.cwd()), <span class="hljs-string">'Cakefile'</span>
<span class="hljs-built_in">console</span>.log <span class="hljs-string">"<span class="hljs-subst">#{cakefilePath}</span> defines the following tasks:\n"</span>
<span class="hljs-keyword">for</span> name, task <span class="hljs-keyword">of</span> tasks
spaces = <span class="hljs-number">20</span> - name.length
spaces = <span class="hljs-keyword">if</span> spaces > <span class="hljs-number">0</span> <span class="hljs-keyword">then</span> Array(spaces + <span class="hljs-number">1</span>).join(<span class="hljs-string">' '</span>) <span class="hljs-keyword">else</span> <span class="hljs-string">''</span>
desc = <span class="hljs-keyword">if</span> task.description <span class="hljs-keyword">then</span> <span class="hljs-string">"# <span class="hljs-subst">#{task.description}</span>"</span> <span class="hljs-keyword">else</span> <span class="hljs-string">''</span>
<span class="hljs-built_in">console</span>.log <span class="hljs-string">"cake <span class="hljs-subst">#{name}</span><span class="hljs-subst">#{spaces}</span> <span class="hljs-subst">#{desc}</span>"</span>
<span class="hljs-built_in">console</span>.log oparse.help() <span class="hljs-keyword">if</span> switches.length</pre></div></div>
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<p>Print an error and exit when attempting to use an invalid task/option.</p>
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<div class="content"><div class='highlight'><pre><span class="hljs-function"><span class="hljs-title">fatalError</span> = <span class="hljs-params">(message)</span> -></span>
<span class="hljs-built_in">console</span>.error message + <span class="hljs-string">'\n'</span>
<span class="hljs-built_in">console</span>.log <span class="hljs-string">'To see a list of all tasks/options, run "cake"'</span>
process.exit <span class="hljs-number">1</span>
<span class="hljs-function"><span class="hljs-title">missingTask</span> = <span class="hljs-params">(task)</span> -></span> fatalError <span class="hljs-string">"No such task: <span class="hljs-subst">#{task}</span>"</span></pre></div></div>
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<p>When <code>cake</code> is invoked, search in the current and all parent directories
to find the relevant Cakefile.</p>
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<div class="content"><div class='highlight'><pre><span class="hljs-function"><span class="hljs-title">cakefileDirectory</span> = <span class="hljs-params">(dir)</span> -></span>
<span class="hljs-keyword">return</span> dir <span class="hljs-keyword">if</span> fs.existsSync path.join dir, <span class="hljs-string">'Cakefile'</span>
parent = path.normalize path.join dir, <span class="hljs-string">'..'</span>
<span class="hljs-keyword">return</span> cakefileDirectory parent <span class="hljs-keyword">unless</span> parent <span class="hljs-keyword">is</span> dir
<span class="hljs-keyword">throw</span> <span class="hljs-keyword">new</span> Error <span class="hljs-string">"Cakefile not found in <span class="hljs-subst">#{process.cwd()}</span>"</span></pre></div></div>
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