feat(maker): add the dmg maker for the darwin target

package.json

@@ -58,6 +58,7 @@
     "colors": "^1.1.2",
     "commander": "^2.9.0",
     "debug": "^2.3.3",
+    "electron-installer-dmg": "^0.1.2",
     "electron-packager": "^8.3.0",
     "electron-winstaller": "^2.5.0",
     "fs-promise": "^0.5.0",

src/makers/darwin/dmg.js

@@ -0,0 +1,22 @@
+import electronDMG from 'electron-installer-dmg';
+import fs from 'fs-promise';
+import mkdirp from 'mkdirp';
+import path from 'path';
+import pify from 'pify';
+import rimraf from 'rimraf';
+
+export default async (dir, appName, forgeConfig) => {
+  const outPath = path.resolve(dir, '../make', `${path.basename(dir)}.dmg`);
+  if (await fs.exists(outPath)) {
+    await pify(rimraf)(outPath);
+  }
+  await pify(mkdirp)(path.dirname(outPath));
+  const dmgConfig = Object.assign({
+    overwrite: true,
+  }, forgeConfig.electronInstallerDMG, {
+    appPath: path.resolve(dir, `${appName}.app`),
+    name: appName,
+    out: path.dirname(outPath),
+  });
+  await pify(electronDMG)(dmgConfig);
+};

src/util/forge-config.js

@@ -8,6 +8,7 @@ export default async (dir) => {
     electronPackagerConfig: {},
     electronWinstallerConfig: {},
     electronInstallerDebian: {},
+    electronInstallerDMG: {},
     electronInstallerRedhat: {},
   }, forgeConfig);
   forgeConfig.make_targets = Object.assign({

test/cli_spec.js

@@ -67,7 +67,7 @@ describe(`electron-forge CLI (with installer=${installer.substr(12)})`, () => {
     let dir;
 
     before(async () => {
-      dir = path.resolve(os.tmpdir(), `electron-forge-test-${Date.now()}`);
+      dir = path.resolve(os.tmpdir(), `electron-forge-test-${`${Date.now()}`.substr(7)}`);
       await pSpawn(['init', dir]);
       await pSpawn(['package', dir]);
     });