From 9cccde927f2029739e058d6977e6858957395c7d Mon Sep 17 00:00:00 2001
From: Dan Abramov <dan.abramov@gmail.com>
Date: Thu, 7 Dec 2017 22:47:56 +0000
Subject: [PATCH] Add `yarn build --pretty` (#11801)

---
 scripts/rollup/build.js | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/scripts/rollup/build.js b/scripts/rollup/build.js
index bc58d8678a..5ed79452b0 100644
--- a/scripts/rollup/build.js
+++ b/scripts/rollup/build.js
@@ -51,6 +51,7 @@ const requestedBundleTypes = (argv.type || '')
 const requestedBundleNames = (argv._[0] || '')
   .split(',')
   .map(type => type.toLowerCase());
+const forcePrettyOutput = argv['pretty'];
 const syncFBSourcePath = argv['sync-fbsource'];
 const syncWWWPath = argv['sync-www'];
 const shouldExtractErrors = argv['extract-errors'];
@@ -191,7 +192,7 @@ function getPlugins(
   const isInGlobalScope = bundleType === UMD_DEV || bundleType === UMD_PROD;
   const isFBBundle = bundleType === FB_DEV || bundleType === FB_PROD;
   const isRNBundle = bundleType === RN_DEV || bundleType === RN_PROD;
-  const shouldStayReadable = isFBBundle || isRNBundle;
+  const shouldStayReadable = isFBBundle || isRNBundle || forcePrettyOutput;
   return [
     // Extract error codes from invariant() messages into a file.
     shouldExtractErrors && {
@@ -471,7 +472,9 @@ async function buildEverything() {
   }
 
   console.log(Stats.printResults());
-  Stats.saveResults();
+  if (!forcePrettyOutput) {
+    Stats.saveResults();
+  }
 
   if (shouldExtractErrors) {
     console.warn(