Allow additional package keys and add blacklist (#8082) (#8219)

packages/react-scripts/scripts/init.js

@@ -118,11 +118,55 @@ module.exports = function(
     templateJson = require(templateJsonPath);
   }
 
+  const templatePackage = templateJson.package || {};
+
+  // Keys to ignore in templatePackage
+  const templatePackageBlacklist = [
+    'name',
+    'version',
+    'description',
+    'keywords',
+    'bugs',
+    'license',
+    'author',
+    'contributors',
+    'files',
+    'main',
+    'browser',
+    'bin',
+    'man',
+    'directories',
+    'repository',
+    'devDependencies',
+    'peerDependencies',
+    'bundledDependencies',
+    'optionalDependencies',
+    'engineStrict',
+    'os',
+    'cpu',
+    'preferGlobal',
+    'private',
+    'publishConfig',
+  ];
+
+  // Keys from templatePackage that will be merged with appPackage
+  const templatePackageToMerge = ['dependencies', 'scripts'];
+
+  // Keys from templatePackage that will be added to appPackage,
+  // replacing any existing entries.
+  const templatePackageToReplace = Object.keys(templatePackage).filter(key => {
+    return (
+      !templatePackageBlacklist.includes(key) &&
+      !templatePackageToMerge.includes(key)
+    );
+  });
+
   // Copy over some of the devDependencies
   appPackage.dependencies = appPackage.dependencies || {};
 
   // Setup the script rules
-  const templateScripts = templateJson.scripts || {};
+  // TODO: deprecate 'scripts' key directly on templateJson
+  const templateScripts = templatePackage.scripts || templateJson.scripts || {};
   appPackage.scripts = Object.assign(
     {
       start: 'react-scripts start',
@@ -152,6 +196,11 @@ module.exports = function(
   // Setup the browsers list
   appPackage.browserslist = defaultBrowsers;
 
+  // Add templatePackage keys/values to appPackage, replacing existing entries
+  templatePackageToReplace.forEach(key => {
+    appPackage[key] = templatePackage[key];
+  });
+
   fs.writeFileSync(
     path.join(appPath, 'package.json'),
     JSON.stringify(appPackage, null, 2) + os.EOL
@@ -221,7 +270,9 @@ module.exports = function(
   }
 
   // Install additional template dependencies, if present
-  const templateDependencies = templateJson.dependencies;
+  // TODO: deprecate 'dependencies' key directly on templateJson
+  const templateDependencies =
+    templatePackage.dependencies || templateJson.dependencies;
   if (templateDependencies) {
     args = args.concat(
       Object.keys(templateDependencies).map(key => {