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Static scope analysis and transpilation of ES6 block scoped const and let variables, to ES3.
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README.md

grunt-defs

Static scope analysis and transpilation of ES6 block scoped const and let variables, to ES3

Build Status Build status Built with Grunt

Getting Started

This plugin requires Grunt.

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-defs --save-dev

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

grunt.loadNpmTasks('grunt-defs');

The "defs" task

Overview

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

grunt.initConfig({
  defs: {
    options: {
      // Task-specific options go here.
    },
    your_target: {
      // Target-specific file lists and/or options go here.
    },
  },
})

Options

The defs task accepts a couple of options:

{
    // Here one can set `defs` options; see: https://npmjs.org/package/defs
    defsOptions: {
        disallowDuplicated: true,
        disallowUnknownReferences: false,
        disallowVars: true,
    },

    // Instead of providing `defsOptions` manually, one can provide a URL to the `defs-config.json`
    // configuration file; see: https://npmjs.org/package/defs
    defsConfigUrl: string,
}

Usage Examples

grunt.initConfig({
    defs: {
        options: {
            defsConfigURL: 'defs-config.json',
        },
        app1: {
            files: {
                'a.js': ['a.js'],
                'c.js': ['b.js'],
                'f.js': ['d.js', 'e.js'],
            },
        },
        app2: {
            files: [
                {
                    expand: true,
                    src: ['f.js'],
                    ext: '.defs.js', // Dest filepaths will have this extension.
                    extDot: 'last',  // Extensions in filenames begin after the last dot
                },
            ],
        },
        app3: {
            files: [
                {
                    expand: true,
                    src: ['g.js'],
                    rename: function (dest, src) { return src + '-defs'; },
                },
            ],
        },
    },
});

grunt.loadNpmTasks('grunt-defs');

After executing grunt defs, you'll get file a.js transformed and saved under the same name, file b.js transformed and saved as c.js and files d.js and e.js concatenated, transformed and saved as f.js.

A transformed version of the f.js file will be saved as f.defs.js and a transformed version of the g.js file will be saved as g.js-defs.

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.

Release History

(Nothing yet)

License

Copyright (c) 2014 Laboratorium EE. Licensed under the MIT license.

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