Simplify gulp to just use 'tsc -b' to build, update to gulp@4

Jakefile.js

@@ -8,10 +8,8 @@ const path = require("path");
 const fold = require("travis-fold");
 const ts = require("./lib/typescript");
 const del = require("del");
-const getDirSize = require("./scripts/build/getDirSize");
+const { getDirSize, needsUpdate, flatten } = require("./scripts/build/utils");
 const { base64VLQFormatEncode } = require("./scripts/build/sourcemaps");
-const needsUpdate = require("./scripts/build/needsUpdate");
-const { flatten } = require("./scripts/build/project");
 
 // add node_modules to path so we don't need global modules, prefer the modules by adding them first
 var nodeModulesPathPrefix = path.resolve("./node_modules/.bin/") + path.delimiter;

package.json

@@ -35,10 +35,8 @@
         "@types/convert-source-map": "latest",
         "@types/del": "latest",
         "@types/glob": "latest",
-        "@types/gulp": "3.X",
+        "@types/gulp": "^4.0.5",
         "@types/gulp-concat": "latest",
-        "@types/gulp-help": "latest",
-        "@types/gulp-if": "0.0.33",
         "@types/gulp-newer": "latest",
         "@types/gulp-rename": "0.0.33",
         "@types/gulp-sourcemaps": "0.0.32",
@@ -50,7 +48,6 @@
         "@types/mocha": "latest",
         "@types/node": "8.5.5",
         "@types/q": "latest",
-        "@types/run-sequence": "latest",
         "@types/source-map-support": "latest",
         "@types/through2": "latest",
         "@types/travis-fold": "latest",
@@ -63,16 +60,12 @@
         "del": "latest",
         "fancy-log": "latest",
         "fs-extra": "^6.0.1",
-        "gulp": "3.X",
-        "gulp-clone": "latest",
+        "gulp": "^4.0.0",
         "gulp-concat": "latest",
-        "gulp-help": "latest",
-        "gulp-if": "latest",
         "gulp-insert": "latest",
         "gulp-newer": "latest",
         "gulp-rename": "latest",
         "gulp-sourcemaps": "latest",
-        "gulp-typescript": "latest",
         "istanbul": "latest",
         "jake": "latest",
         "lodash": "4.17.10",
@@ -86,7 +79,6 @@
         "prex": "^0.4.3",
         "q": "latest",
         "remove-internal": "^2.9.2",
-        "run-sequence": "latest",
         "source-map-support": "latest",
         "through2": "latest",
         "travis-fold": "latest",

scripts/build/browserify.js

@@ -1,12 +1,10 @@
 // @ts-check
 const browserify = require("browserify");
-const Vinyl = require("./vinyl");
+const Vinyl = require("vinyl");
 const { Transform } = require("stream");
 const { streamFromFile } = require("./utils");
 const { replaceContents } = require("./sourcemaps");
 
-module.exports = browserifyFile;
-
 /**
  * @param {import("browserify").Options} [opts]
  */
@@ -31,4 +29,5 @@ function browserifyFile(opts) {
             }
         }
     });
-}
+}
+exports.browserify = browserifyFile;