应该是了。我自己在桌面创建了一个文件夹，把这个文件夹里的react-app项目commit后，再执行npm run eject就可以了。
不这样的话，我把项目放在任何地方去执行npm run eject还是出git问题（它居然会往上层去找没提交的文件，一直找到Desktop文件夹的上一层,然后显示一堆无关的文件夹要我提交，会把react-app这个项目逐渐一层一层的上层文件全部给显示出来要我提交，注意是全部文件。我的MAC目录可能有杂乱的git项目。
不过最后还是成功了：
react-scripts eject
? Are you sure you want to eject? This action is permanent. Yes
Ejecting…
Copying files into /Users/public1/Desktop/HTML-Study/react-app
Adding /config/env.js to the project
Adding /config/paths.js to the project
Adding /config/polyfills.js to the project
Adding /config/webpack.config.dev.js to the project
Adding /config/webpack.config.prod.js to the project
Adding /config/webpackDevServer.config.js to the project
Adding /config/jest/cssTransform.js to the project
Adding /config/jest/fileTransform.js to the project
Adding /scripts/build.js to the project
Adding /scripts/start.js to the project
Adding /scripts/test.js to the project
Updating the dependencies
Removing react-scripts from dependencies
Adding autoprefixer to dependencies
Adding babel-core to dependencies
Adding babel-eslint to dependencies
Adding babel-jest to dependencies
Adding babel-loader to dependencies
Adding babel-preset-react-app to dependencies
Adding babel-runtime to dependencies
Adding case-sensitive-paths-webpack-plugin to dependencies
Adding chalk to dependencies
Adding css-loader to dependencies
Adding dotenv to dependencies
Adding dotenv-expand to dependencies
Adding eslint to dependencies
Adding eslint-config-react-app to dependencies
Adding eslint-loader to dependencies
Adding eslint-plugin-flowtype to dependencies
Adding eslint-plugin-import to dependencies
Adding eslint-plugin-jsx-a11y to dependencies
Adding eslint-plugin-react to dependencies
Adding extract-text-webpack-plugin to dependencies
Adding file-loader to dependencies
Adding fs-extra to dependencies
Adding html-webpack-plugin to dependencies
Adding jest to dependencies
Adding object-assign to dependencies
Adding postcss-flexbugs-fixes to dependencies
Adding postcss-loader to dependencies
Adding promise to dependencies
Adding raf to dependencies
Adding react-dev-utils to dependencies
Adding resolve to dependencies
Adding style-loader to dependencies
Adding sw-precache-webpack-plugin to dependencies
Adding url-loader to dependencies
Adding webpack to dependencies
Adding webpack-dev-server to dependencies
Adding webpack-manifest-plugin to dependencies
Adding whatwg-fetch to dependencies
Updating the scripts
Replacing “react-scripts start” with “node scripts/start.js”
Replacing “react-scripts build” with “node scripts/build.js”
Replacing “react-scripts test” with “node scripts/test.js”
Configuring package.json
Adding Jest configuration
Adding Babel preset
Adding ESLint configuration
Ejected successfully!
Please consider sharing why you ejected in this survey:
http://goo.gl/forms/Bi6CZjk1EqsdelXk1
