add source map support

Summary: Use inline source maps for plugins and main bundle, both in production and development.

Reviewed By: passy

Differential Revision: D9967235

fbshipit-source-id: 245e65c6fea94b93dc34a65ae572b7fc98ad56e1

scripts/build-release.js

@@ -156,6 +156,9 @@ function compile(buildFolder) {
       minify: false,
       resetCache: true,
       sourceMap: true,
+      // due to a bug in metro inline source maps are only created when
+      // sourceMapUrl is truthy: https://github.com/facebook/metro/pull/260
+      sourceMapUrl: 'inline',
       entry: path.join(__dirname, '..', 'src', 'init.js'),
       out: path.join(buildFolder, 'bundle.js'),
     },

static/compilePlugins.js

@@ -173,6 +173,9 @@ async function compilePlugin(
           out,
           dev: false,
           sourceMap: true,
+          // due to a bug in metro inline source maps are only created when
+          // sourceMapUrl is truthy: https://github.com/facebook/metro/pull/260
+          sourceMapUrl: 'inline',
         },
       );
     } catch (e) {