grunt-subgrunt

Run sub-projects' grunt tasks. This plugin was inspired by https://gist.github.com/cowboy/3819170.

Getting started

If you haven't used Grunt before, be sure to check out the Getting Started guide, as it explains how to create a Gruntfile as well as install and use Grunt plugins. Once you're familiar with that process, you may install this plugin with this command:

npm install grunt-subgrunt --save-dev

Once the plugin has been installed, it may be enabled inside your Gruntfile with this line of JavaScript:

grunt.loadNpmTasks('grunt-subgrunt');

Release notes

For change logs and release notes, see the changelog file.

The "subgrunt" task

Overview

In your project's Gruntfile, add a section named subgrunt to the data object passed into grunt.initConfig().

grunt.initConfig({
  subgrunt: {
    options: {
      // Task-specific options go here.
    },
    your_target: {
      options: {
        // Target-specific options
      },
      projects: {
        // Paths to sub-projects' gruntfiles
      }
    },
  },
})

Options

options.npmInstall

Type: bool
Default value: true

Determines wether npm install will be ran for the sub-project (thus installing dev dependencies).

options.npmClean

Type: bool
Default value: false
Requires npm >= 1.3.10

When enabled, runs npm prune --production to clean development dependencies.

options.npmPath

Type: string
Default value: 'npm'

The location of the npm executable. Defaults to 'npm' as it should be available in the $PATH environment variable.

options.passGruntFlags

Type: bool
Default value: true

When enabled, passes the grunt.options thru to the subgrunt task.

options.limit

Type: Number
Default value: Number of CPU cores (require('os').cpus().length) with a minimum of 2

Limit how many sub-grunt projects are launched concurrently.

Usage examples

grunt.initConfig({
  subgrunt: {
    target0: {
      projects: {
        // For each of these projects, the specified grunt task will be executed:
        'node_modules/module1': 'default',
        'node_modules/module2': 'bower:install'
      }
    },
    target1: {
      // Without target-specific options, the projects object is optional:
      'node_modules/module1': 'default',
      'node_modules/module2': 'bower:install'
    },
    target2: {
      // Use an array to run multiple tasks:
      'node_modules/module1': [ 'clean', 'test' ]
    },
    target3: {
      // you can use this array to add parameters:
      'node_modules/module1': [ 'clean', '--myParam="foobar"', '--verbose' ]
    },
    target4: [
      // Using an array will just execute the 'default' grunt task:
      'node_modules/module3',
      'node_modules/module4'
    ],
    target5: {
      // npm install will not be ran for this target:
      options: {
        npmInstall: false
      },
      projects: {
        'sub-projects/my-awesome-module': 'build:dist'
      }
    },
    target6: {
      // The npm devDependencies will be cleaned out after running the grunt tasks.
      options: {
        npmClean: true
      },
      projects: {
        'node_modules/module1': [ 'preprocess', 'build' ]
      }
    },
    target7: {
      // grunt option flags will not be passed to the subgrunts
      options: {
        passGruntFlags: false
      },
      projects: {
        'baz': [ 'foo', 'bar' ]
      }
    }
  }
})

Contributing

In lieu of a formal styleguide, take care to maintain the existing coding style. Add unit tests for any new or changed functionality. Lint and test your code using Grunt.

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