ChildProcess.exec (with passing tests)

src/stdlib/child-process.coffee

@@ -0,0 +1,50 @@
+# node.js child-process
+# http://nodejs.org/docs/v0.6.3/api/child_processes.html
+
+_ = require 'underscore'
+
+module.exports =
+  exec: (command, options, callback) ->
+    callback = options if _.isFunction options    
+   
+    # make a task
+    task = OSX.NSTask.alloc.init
+    
+    # try to use their login shell
+    task.setLaunchPath "/bin/bash"
+    
+    # set stdin to /dev/null
+    task.setStandardInput OSX.NSFileHandle.fileHandleWithNullDevice
+    
+    # -l = login shell, -c = command
+    args = ["-l", "-c", command]
+    task.setArguments args
+   
+    # setup stdout and stderr
+    task.setStandardOutput stdout = OSX.NSPipe.pipe
+    task.setStandardError stderr = OSX.NSPipe.pipe
+    stdoutHandle = stdout.fileHandleForReading
+    stderrHandle = stderr.fileHandleForReading
+   
+    # begin
+    task.launch
+   
+    # read pipes
+    err = @readHandle stderrHandle
+    out = @readHandle stdoutHandle
+    
+    # check for a dirty exit
+    if not task.isRunning
+      code = task.terminationStatus
+      if code > 0
+        error = new Error
+        error.code = code
+        
+    # call callback    
+    callback error, out, err
+    
+  readHandle: (handle) ->
+    OSX.NSString.
+    alloc.
+    initWithData_encoding(handle.readDataToEndOfFile, OSX.NSUTF8StringEncoding).
+    toString()

test/child_process_test.coffee

@@ -0,0 +1,14 @@
+assert = require 'assert'
+ChildProcess = require 'child-process'
+
+ChildProcess.exec "echo hello", (error, stdout, stderr) ->
+  assert.equal "hello", stdout.trim()
+  assert.equal null, error  
+  
+ChildProcess.exec "derp hello", (error, stdout, stderr) ->
+  assert.equal "/bin/bash: derp: command not found", stderr.trim()
+  assert.ok error
+  assert.equal 127, error.code
+
+ChildProcess.exec "coffee -e 'console.log 1+1'", (error, stdout, stderr) ->
+  assert.equal "2", stdout.trim()