typescript gulp task

gulpfile.js

var gulp        = require("gulp"),
    browserify  = require("browserify"),
    source      = require("vinyl-source-stream"),
    buffer      = require("vinyl-buffer"),
    tslint      = require("gulp-tslint"),
    tsc         = require("gulp-typescript"),
    sourcemaps  = require("gulp-sourcemaps"),
    uglify      = require("gulp-uglify"),
    runSequence = require("run-sequence"),
    mocha       = require("gulp-mocha"),
    istanbul    = require("gulp-istanbul"),
    browserSync = require('browser-sync').create();


gulp.task("default", function (cb) {
    runSequence("lint", "build", "test", "bundle", cb);
});


// tslint expects to find a file named tslint.json in the root folder of the project. 
// The tslint.json is to configure the TypeScript linter options.     
gulp.task("lint", function() {
    return gulp.src([
        "source/**/**.ts",
        "test/**/**.test.ts"
    ])
    .pipe(tslint({ }))
    .pipe(tslint.report("verbose"));
});


// compile our application’s source code
var tsProject = tsc.createProject("tsconfig.json");
gulp.task("build-app", function() {
    return gulp.src([
            "source/**/**.ts",
            "typings/main.d.ts/",
            "source/interfaces/interfaces.d.ts"
        ])
        .pipe(tsc(tsProject))
        .js.pipe(gulp.dest("source/"));
});


// use Browserify to transform CommonJS into one single file that can be loaded by a web browser
gulp.task("bundle", function() {

    var libraryName = "myapp";
    var mainTsFilePath = "source/main.js";
    var outputFolder   = "dist/";
    var outputFileName = libraryName + ".min.js";

    var bundler = browserify({
        debug: true,
        standalone : libraryName
    });

    return bundler.add(mainTsFilePath)
        .bundle()
        .pipe(source(outputFileName))
        .pipe(buffer())
        .pipe(sourcemaps.init({ loadMaps: true }))
        .pipe(uglify())
        .pipe(sourcemaps.write('./'))
        .pipe(gulp.dest(outputFolder));
});


// observe changes in the code, trigger the compilation process and display changes in a web browser
gulp.task("watch", ["default"], function () {

    browserSync.init({
        server: "."
    });

    gulp.watch([ "source/**/**.ts", "test/**/*.ts"], ["default"]);
    gulp.watch("dist/*.js").on('change', browserSync.reload); 
});


// test
gulp.task("istanbul:hook", function() {
    return gulp.src(['source/**/*.js'])
        // Covering files
        .pipe(istanbul())
        // Force `require` to return covered files
        .pipe(istanbul.hookRequire());
});

gulp.task("test", ["istanbul:hook"], function() {
    return gulp.src('test/**/*.test.js')
        .pipe(mocha({ui: 'bdd'}))
        .pipe(istanbul.writeReports());
});

tsconfig.json

{
    "compilerOptions": {
        "target": "es5",
        "sourceMap": true,
        "module": "commonjs",
        "moduleResolution": "node",
        "isolatedModules": false,
        "jsx": "react",
        "experimentalDecorators": true,
        "emitDecoratorMetadata": true,
        "declaration": false,
        "noImplicitAny": false,
        "removeComments": true,
        "noLib": false,
        "preserveConstEnums": true,
        "suppressImplicitAnyIndexErrors": true
    }
}

tslint.json

{
  "rules": {
    "class-name": true,
    "comment-format": [true, "check-space"],
    "curly": true,
    "eofline": true,
    "forin": true,
    "indent": [true, "spaces"],
    "label-position": true,
    "label-undefined": true,
    "max-line-length": [true, 140],
    "member-access": true,
    "member-ordering": [true,
      "public-before-private",
      "static-before-instance",
      "variables-before-functions"
    ],
    "no-arg": true,
    "no-bitwise": true,
    "no-console": [true,
      "debug",
      "info",
      "time",
      "timeEnd",
      "trace"
    ],
    "no-construct": true,
    "no-debugger": true,
    "no-duplicate-key": true,
    "no-duplicate-variable": true,
    "no-empty": true,
    "no-eval": true,
    "no-inferrable-types": true,
    "no-shadowed-variable": true,
    "no-string-literal": true,
    "no-switch-case-fall-through": true,
    "no-trailing-whitespace": true,
    "no-unused-expression": true,
    "no-unused-variable": true,
    "no-unreachable": true,
    "no-use-before-declare": true,
    "no-var-keyword": true,
    "object-literal-sort-keys": true,
    "one-line": [true,
      "check-open-brace",
      "check-catch",
      "check-else",
      "check-finally",
      "check-whitespace"
    ],
    "quotemark": [true, "double", "avoid-escape"],
    "radix": true,
    "semicolon": true,
    "trailing-comma": [true, {
      "singleline": "never",
      "multiline": "always"
    }],
    "triple-equals": [true, "allow-null-check"],
    "typedef-whitespace": [true, {
      "call-signature": "nospace",
      "index-signature": "nospace",
      "parameter": "nospace",
      "property-declaration": "nospace",
      "variable-declaration": "nospace"
    }],
    "variable-name": false,
    "whitespace": [true,
      "check-branch",
      "check-decl",
      "check-operator",
      "check-separator",
      "check-type"
    ]
  }
}