How to specify compression for custom build environment in Ember

Question

How do I specify compression, bundling and adding invalidation hashes to filenames for a custom environment?

The production environment will automatically compress and consolidate files and add invalidation hashes to the file names. I.e. whenever I use ember build --environment=production to trigger the if (environment === 'production'){} case in config/environment.js

But I want to create and build for a QA environment that also compresses files and adds invalidation hashes to file names. I.e. the following should also produce compressed files named with invalidation hashes (output the same as what production outputs except with QA variables, like URLs):

config/environment.js

if (environment === `qa`){
    ENV.somevar = 'qa-value'
}

command

ember build --environment=qa

Answer 1

This is configured in ember-cli-build.js file of your project. By default fingerprinting is only enabled in production (app.env === 'production'). This could be changed by fingerprint.enabled option. The same applies to ember-cli-uglify for JavaScript minification and minifyCSS options. Configure these options as required:

'use strict';

const EmberApp = require('ember-cli/lib/broccoli/ember-app');

module.exports = function(defaults) {
  let env = EmberApp.env();
  let isProductionLike = ['production', 'qa'].includes(env);
  let app = new EmberApp({
    'ember-cli-uglify': {
      enabled: isProductionLike
    },
    fingerprint: {
      enabled: isProductionLike
    },
    minifyCSS: {
      enabled: isProductionLike
    },
    sourcemaps: {
      enabled: !isProductionLike
    }
  });

  return app.toTree();
};

ember-cli-uglify option was named minifyJS in ember-cli-uglify 1.x. The addon was updated in default blueprint of ember-cli 2.16. Change option name accordingly if you are still using ember-cli-uglify@1.x. At the point of time writing this answer, ember-cli docs had not yet reflected that breaking change. It was introduced here. Also note that there is an open issue about it, so it might change in the future again.

More details and options are available in asset compilation chapter of ember-cli docs.