Programmatically pass arguments to grunt task?

Question

I have a grunt task that calls other grunt tasks. I want to call a subtask with programmatically determined arguments. Is this possible? I spent some time digging around the lib/grunt.js and lib/grunt/task.js, but couldn't figure it out.

I'm using grunt-compass with the following arguments specified in Gruntfile.js:

compass: {
  default_options: {
    src: 'components/201',
    dest: 'build',
    require: ['zurb-foundation']
  }
}

I want to be able to override them at runtime:

tasks/my-task.js:

// simplified example
module.exports = function(grunt) {
  grunt.registerTask('foo', 'bar', function() {
    var chooseDest = doWork();
    grunt.task.run('compass', {src: 'src', dest: chooseDest});
  });
};

For reference:

$ grunt --version
grunt-cli v0.1.6
grunt v0.4.0rc6

score 59 · Accepted Answer · answered Feb 08 '13 at 20:33

59

I figured it out. Use the <%= %> syntax in Gruntfile.js:

compass: {
  default_options: {
    src: 'components/<%= myTask.src %>',
    dest: 'build',
    require: ['zurb-foundation']
  }
}

Then you can set it in your task:

grunt.config.set('myTask.src', getSrc());

answered Feb 08 '13 at 20:33

Nick Heiner

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5

Where do you get that myTask var? is it global? is it defined on grunt .iniConfig? – Dan Rocha Apr 09 '14 at 17:27
2

@DanRocha I would guess it is a variable specified in the grunt.initConfig which you set during runtime using the last line of code that Rosarch posted. – njtman Apr 11 '14 at 19:25

score 3 · Answer 2 · answered Oct 22 '14 at 13:01

3

You can edit all the Grunt config:

grunt.config('compass.default_options.src', 'blabla');

Just before run the task. But your solution is "cleaner".

answered Oct 22 '14 at 13:01

Thomas Decaux

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Programmatically pass arguments to grunt task?

2 Answers2

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