Allow using different tsconfig files for dev and build

packages/react-scripts/config/paths.js

@@ -59,6 +59,7 @@ module.exports = {
   testsSetup: resolveApp('src/setupTests.ts'),
   appNodeModules: resolveApp('node_modules'),
   appTsConfig: resolveApp('tsconfig.json'),
+  appTsProdConfig: resolveApp('tsconfig.prod.json'),
   appTsLint: resolveApp('tslint.json'),
   publicUrl: getPublicUrl(resolveApp('package.json')),
   servedPath: getServedPath(resolveApp('package.json')),
@@ -81,6 +82,7 @@ module.exports = {
   testsSetup: resolveApp('src/setupTests.ts'),
   appNodeModules: resolveApp('node_modules'),
   appTsConfig: resolveApp('tsconfig.json'),
+  appTsProdConfig: resolveApp('tsconfig.prod.json'),
   appTsTestConfig: resolveApp('tsconfig.test.json'),
   appTsLint: resolveApp('tslint.json'),
   publicUrl: getPublicUrl(resolveApp('package.json')),
@@ -113,6 +115,7 @@ if (
     testsSetup: resolveOwn('template/src/setupTests.ts'),
     appNodeModules: resolveOwn('node_modules'),
     appTsConfig: resolveOwn('template/tsconfig.json'),
+    appTsProdConfig: resolveOwn('template/tsconfig.prod.json'),
     appTsLint: resolveOwn('template/tslint.json'),
     appTsTestConfig: resolveOwn('template/tsconfig.test.json'),
     publicUrl: getPublicUrl(resolveOwn('package.json')),

packages/react-scripts/config/webpack.config.prod.js

@@ -183,6 +183,7 @@ module.exports = {
                 options: {
                   // disable type checker - we will use it in fork plugin
                   transpileOnly: true,
+                  configFile: paths.appTsProdConfig
                 },
               },
             ],
@@ -381,7 +382,7 @@ module.exports = {
     // Perform type checking and linting in a separate process to speed up compilation
     new ForkTsCheckerWebpackPlugin({
       async: false,
-      tsconfig: paths.appTsConfig,
+      tsconfig: paths.appTsProdConfig,
       tslint: paths.appTsLint,
     }),
   ],

packages/react-scripts/template/tsconfig.prod.json

@@ -0,0 +1,3 @@
+{
+  "extends": "./tsconfig.json"
+}