"flipper-pkg" option for creating production bundle

Summary:
Development bundle: NODE_ENV=development, disabled minification, enabled source maps.

Production bundle: NODE_ENV=production, enabled minification, disabled source maps.

Changelog: Added "--production" option for "flipper-pkg bundle" command to produce minified plugin packages without source maps.

Reviewed By: mweststrate

Differential Revision: D22158791

fbshipit-source-id: 0f9ac84ca39ac3fb86f0c0b0a3c1be866445a305

desktop/pkg-lib/src/runBuild.ts

@@ -59,8 +59,8 @@ export default async function runBuild(
   inputDirectory: string,
   entry: string,
   out: string,
+  dev: boolean,
 ) {
-  const dev = process.env.NODE_ENV !== 'production';
   const baseConfig = await Metro.loadConfig();
   const config = Object.assign({}, baseConfig, {
     reporter: {update: () => {}},
@@ -96,7 +96,7 @@ export default async function runBuild(
     dev,
     minify: !dev,
     resetCache: !dev,
-    sourceMap: true,
+    sourceMap: dev,
     entry,
     out,
   });