Building Pebble watchapps with Grunt and Grunt-Shell.

gistfile1.txt

$ npm install -g grunt-cli
$ npm install --save-dev grunt-shell

Gruntfile.js

module.exports = function(grunt) {
    grunt.initConfig({
        phoneIP: '192.168.1.100',
        // set logs: '' to turn off logging
        logs: '--logs',
        shell: {
            buildAndInstall: {
                options: {
                    stdout: true,
                    stderr: true
                },
                command: 'pebble build; pebble install --phone=<%= phoneIP %> <%= logs %>'
            }
        }
    });

    grunt.loadNpmTasks('grunt-shell');
    grunt.registerTask('default', ['shell']);
}