Configure Restangular.baseUrl using Gruntjs

Question

I'm using Restangular in a project built using Gruntjs. Here is a snippet:

// scripts/app.js

angular.module('myApp', ['restangular'])])
  .config(['RestangularProvider', function(RestangularProvider) {

    /* this is different on dev, test, prod environments */
    var baseUrl = 'http://localhost:8080/sms-api/rest/management/';

    RestangularProvider.setBaseUrl(baseUrl);
}])

I would like to have a different value for baseUrl if specified at cli or a default if not specified:

$ grunt server
Using default value for 'baseUrl'

$ grunt build --rest.baseUrl='http://my.domain.com/rest/management/'
Using 'http://my.domain.com/rest/management/' for 'baseUrl'

How can I do that?

Answer 1

It's possible with the aid of Grunt preprocess which is useful for replacing (and other things) templates inside files.

First add this to your .js code:

/* Begin insertion of baseUrl by GruntJs */
/* @ifdef baseUrl
 var baseUrl = /* @echo baseUrl */ // @echo ";"
 // @endif */

/* @ifndef baseUrl
 var baseUrl = 'http://www.fallback.url';
 // @endif */
/* End of baseUrl insertion */

Then in your grunt file, after installing grunt preprocess (i.e npm install grunt-preprocess --save-dev you add the following configuration:

 preprocess: {
        options: {
            context: {

            }
        },
        js: {
            src: 'public/js/services.js',
            dest: 'services.js'
        }
    },

obviously, you need to update the js file list accordingly to which ever files you use. important notice - if you are planning on updating the same file (and not to a new destination) you need to use the inline option

At last, in order to work with a command line config variable, add the following custom task to your grunt file as well:

grunt.registerTask('baseUrl', function () {
        var target = grunt.option('rest.baseUrl') || undefined;
        grunt.log.ok('baseUrl is set to', target);
        grunt.config('preprocess.options.context.baseUrl', target);
        grunt.task.run('preprocess');
    });

Finally, run the baseUrl task like so:

grunt baseUrl --rest.baseUrl='http://some.domain.net/public/whatever'

Notice I put in a fallback url so you can also run grunt baseUrl and grunt will set your baseUrl to your defined one.