Ember-cli-config-builder NPM

ember-cli-config-builder

Extensible library to edit Ember’s config files with familiar API.

Why? Checkout this blog post.

Installation

$ npm install --save ember-cli-config-builder

$ yarn add ember-cli-config-builder

Basic Usage

// Import library
const ConfigBuilder = require('ember-cli-config-builder');

// Create builder instance. Notice: it is async operation which returns
// Promise because async fs.readFile method is used to read file contents
let config = await ConfigBuilder.create('./my-addon/config/environment.js');

// Read variables with #get(path) method. Notice: it is always returns string
// with raw value. Example: "'string value'", 'true', '{ object: true }' etc
config.get('rootURL'); // "'/'"

// Read nested values with dot-separated path
config.get('EmberENV.EXTEND_PROTOTYPES.Date'); // 'false'

// Read multiple values at once
config.get(['modulePrefix', 'locationType']); // { modulePrefix: "'dummy'", locationType: "'auto'" }

// Change existing properties with #set(path, value) method. It returns true
// if set was successful or false otherwise
config.set('rootURL', "'/dev'"); // true

// Create a new poperty
config.set('myNewProp', '{}'); // true

// Change nested properties
config.set('EmberENV.EXTEND_PROTOTYPES.Date', 'true'); // true

// Change or create multiple properties at once
config.setProperties({ 'myNewProp.child': "'works'", 'rootURL.child': "'rootURL is not an object'" }); // { 'myNewProp.child': true, 'rootURL.child': false }

// Or remove properties entirely with #remove(path) method. It returns true
// if key was found and removed and false otherwise
config.remove('rootURL'); // true

// You can remove only child keys.
config.remove('myNewProp.child'); // true

// Multiple remove is available as well
config.removeProperties(['myNewProp', 'modulePrefix']); // { myNewProp: true, modulePrefix: true }

// After editing is done there are a few options to save result.
// The most straightforward is save to the same file.
// Notice: this method is async as well because of usage non-blocking
// fs.writeFile method
await config.save(); // will write changes to disk and return string with file content

// Or you can write changes to another file
await config.save('./my-addon/config/new-environment.js');

// See Advanced Usage section for more use cases

Built-in adapters

environment.js
ember-cli-build.js

Alternatives

ember-cli-build-config-editor – uses the same approach with recast AST trees but is have many limits what you can edit and uses it owns non-Ember intuitive API. Also it moves reading and writing files to user responsibilities.
recast – very powerful but yet very low-level tool to parse, edit and print JavaScript files. This addon wraps it to make editing much more easier.