Print file sizes with correct build folder path. (#2361)

* Print file sizes with correct build folder path.

* Just use the print the basename.

Author: fezhengjin

packages/react-dev-utils/FileSizeReporter.js

@@ -18,7 +18,7 @@ var stripAnsi = require('strip-ansi');
 var gzipSize = require('gzip-size').sync;
 
 // Prints a detailed summary of build files.
-function printFileSizesAfterBuild(webpackStats, previousSizeMap) {
+function printFileSizesAfterBuild(webpackStats, previousSizeMap, buildFolder) {
   var root = previousSizeMap.root;
   var sizes = previousSizeMap.sizes;
   var assets = webpackStats
@@ -30,7 +30,7 @@ function printFileSizesAfterBuild(webpackStats, previousSizeMap) {
       var previousSize = sizes[removeFileNameHash(root, asset.name)];
       var difference = getDifferenceLabel(size, previousSize);
       return {
-        folder: path.join('build', path.dirname(asset.name)),
+        folder: path.join(path.basename(buildFolder), path.dirname(asset.name)),
         name: path.basename(asset.name),
         size: size,
         sizeLabel: filesize(size) + (difference ? ' (' + difference + ')' : ''),

packages/react-scripts/scripts/build.js

@@ -75,7 +75,7 @@ measureFileSizesBeforeBuild(paths.appBuild)
       }
 
       console.log('File sizes after gzip:\n');
-      printFileSizesAfterBuild(stats, previousFileSizes);
+      printFileSizesAfterBuild(stats, previousFileSizes, paths.appBuild);
       console.log();
 
       const appPackage = require(paths.appPackageJson);