[question] How to load variables from .env files

[juan88]

I'm using grunt-replace to perform some substitutions of variables according to the environment (dev/testing/production). Those variables are set like this:

config: {
            dev: {
                options: {
                    variables: {
                        base_url: 'localhost'
                    }
                }
            },
            testing: {
                options: {
                    variables: {
                        base_url: 'testing.example.com'
                    }
                }
            },
            prod: {
                options: {
                    variables: {
                        base_url: 'production.example.com'
                    }
                }
            }
        },

Then I'm replacing the variables with grunt-replace, like this:

replace: {
            main: {
                options: {
                    patterns: [
                        {
                            match: 'BASE_URL',
                            replacement: '<%= grunt.config.get("base_url") %>'
                        }
                    ]
                },
                src: 'src/main.js' ,
                dest: 'dist/main.js'
            },
}

Since I'm using an .env file configured for the mentioned environments (.env.development, .env.testing / .env.production), is it possible to tell grunt-env to load that file and perform the replacements with this instead with grunt-config? I would like to do this so that to avoid having duplicated code for setting those variables in each environment.

Thanks!