How can I run a grunt task from within a grunt task?

Question

I\'ve created a new grunt task and within it I want to use grunt-contrib-concat to concatenate a few files together.

I looked through the docs but I don\'t find an

Answer 1

If you are feeling lazy I ended up publishing a npm module that forwards the configs from your task into the subtask that you want to run:

https://www.npmjs.org/package/extend-grunt-plugin

Answer 2

Thx to Arron that pointed us out in the right direction to his own question. The grunt.config is the key from the example above. This task will override the src property of the browserify task

Task definition:

  grunt.registerTask('tests', function (spec) {

    if (spec) {
      grunt.config('browserify.tests.src', spec);
    }

    grunt.task.run(['jshint', 'browserify:tests', 'jasmine']);

  }); 

Task call:

grunt tests

or

grunt tests:somewhere/specPath.js

Answer 3

Here's an example of manually configuring a task within a task and then running it.

https://github.com/gruntjs/grunt-contrib/issues/118#issuecomment-8482130

 grunt.registerMultiTask('multicss', 'Minify CSS files in a folder', function() {
        var count = 0;
        grunt.file.expandFiles(this.data).forEach(function(file) {
            var property = 'mincss.css'+count+'.files';
            var value = {};
            value[file] = file;
            grunt.config(property, value);
            grunt.log.writeln("Minifying CSS "+file);
            count++;
        });
        grunt.task.run('mincss');
    });

Answer 4

From https://github.com/gruntjs/grunt/wiki/Creating-tasks

grunt.registerTask('foo', 'My "foo" task.', function() {
  // Enqueue "bar" and "baz" tasks, to run after "foo" finishes, in-order.
  grunt.task.run('bar', 'baz');
  // Or:
  grunt.task.run(['bar', 'baz']);
});