Gruntfile.js

module.exports = function(grunt) {
    grunt.loadNpmTasks("grunt-ts");

    function typescriptConfig(watch) {
        return {
            // The source TypeScript files, http://gruntjs.com/configuring-tasks#files
            src: [
                "src/main/resources/META-INF/public-web-resources/ts/infrastructure/*.ts",
                "src/main/resources/META-INF/public-web-resources/ts/tasks/*.ts"
            ],
            // The source html files, https://github.com/grunt-ts/grunt-ts#html-2-typescript-support
            html: [
                "src/main/resources/META-INF/public-web-resources/ts/infrastructure/*.tpl.html",
                "src/main/resources/META-INF/public-web-resources/ts/tasks/*.tpl.html"
            ],
            // If specified, generate this file that to can use for reference management
            reference: "src/main/resources/META-INF/public-web-resources/ts/_reference.ts",
            // If specified, generate an out.js file which is the merged js file
            out: 'src/main/resources/META-INF/public-web-resources/js/app/app.js',
            // If specified, the generate JavaScript files are placed here. Only works if out is not specified
//                outDir: 'src/main/resources/META-INF/public-web-resources/js',
            // If specified, watches this directory for changes, and re-runs the current target
            watch: watch ? 'src/main/resources/META-INF/public-web-resources/ts' : undefined,
            // Use to override the default options, http://gruntjs.com/configuring-tasks#options
            options: {
                // 'es3' (default) | 'es5'
                target: 'es3',
                // 'amd' (default) | 'commonjs'
                module: 'commonjs',
                // true (default) | false
                sourceMap: true,
                // true | false (default)
                declaration: false,
                // true (default) | false
                removeComments: true
            }
        };
    }

    grunt.initConfig({
        ts: {
            build: typescriptConfig(false),
            watch: typescriptConfig(true)
        }
    });
    grunt.registerTask("default", ["ts:build"]);
};