【问题解决】Error: spawnSync ./gradlew EACCES_error: spawnsync pnpm enoent_像树_的博客

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MacOs
react-native run-android

出现了以下报错
Make sure you have the Android development environment
Error: spawnSync ./gradlew EACCES
具体：

info Running jetifier to migrate libraries to AndroidX. You can disable it using "--no-jetifier" flag.
Jetifier found 1016 file(s) to forward-jetify. Using 6 workers...
info JS server already running.
info Installing the app...
error Failed to install the app. Make sure you have the Android development environment set up: https://facebook.github.io/react-native/docs/getting-started.html#android-development-environment. Run CLI with --verbose flag for more details.
Error: spawnSync ./gradlew EACCES
    at Object.spawnSync (internal/child_process.js:1041:20)
    at spawnSync (child_process.js:607:24)
    at execFileSync (child_process.js:634:15)
    at runOnAllDevices (/Users/momo/Documents/PR/react-native-apps/demo/node_modules/@react-native-community/cli-platform-android/build/commands/runAndroid/runOnAllDevices.js:94:39)
    at buildAndRun (/Users/momo/Documents/PR/react-native-apps/demo/node_modules/@react-native-community/cli-platform-android/build/commands/runAndroid/index.js:179:41)
    at /Users/momo/Documents/PR/react-native-apps/demo/node_modules/@react-native-community/cli-platform-android/build/commands/runAndroid/index.js:133:12
    at processTicksAndRejections (internal/process/task_queues.js:93:5)
    at async Command.handleAction (/Users/momo/Documents/PR/react-native-apps/demo/node_modules/@react-native-community/cli/build/index.js:182:9)
解决办法：
 在项目目录下使用以下指令： 
chmod 755 android/gradlew
 the chmod command sets the permissions of files or directories.
 https://www.computerhope.com/unix/uchmod.htm 
                                    Failed to save ‘index.jsx’: Insufficient permissions. Select ‘Retry as Sudo’ to retry as superuser.
EACCES: permission denied
解决方法：授予权限
sudo chmod -R 777 .  ## 为当前目录及子目录搜于读写权限
-R : 对目前目录下的所有文件与子目录进行相同的权限变更(即以递回的方式逐个变更)
其他参数：
u 表示该文件的拥有者，g 表示与该文件的拥有者属于同一个群体(group)者，o 表示其他以外的人，a 表示这三者皆是。
+ 表示增加权限
实现一个简单的从模拟器的SD卡中读取数据实现音乐的播放暂停和停止
关键代码如下：
protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        getWindow().setFlags(WindowManager.Lay
 npm install -g fixmynode
您是否经常遇到这个烦人的错误？ 
 npm ERR! Error: EACCES, open '/Users/YOUR_USERNAME/.npm/-/all/.cache.json'
npm ERR!  { [Error: EACCES, open '/Users/YOUR_USERNAME/.npm/-/all/.cache.json']
npm ERR!   errno: 3,
npm ERR!   code: 'EACCES',
npm ERR!   path: '/Users/YOUR_USERNAME/.npm/-/all/.cache.json' }
npm ERR!
npm ERR! Please try running this command aga
                                    运行sudo npm install -g webpack@4.35.2 安装指定版本的webpack出现如下错误：
gyp ERR! configure error
gyp ERR! stack Error: EACCES: permission denied, mkdir ‘/Users/mac-pro/.nvm/versions/node/v10.16.0/lib/node_modules/webpack/node_modules/fsevents/build’
gyp ERR! System Darwin 19.3.0
gyp ERR! command “/Users/mac-pro/
                                    一般来说，报 Error: spawn *** ENOENT 错误的原因可总结为：A.  spawn方法参数不正确：child_process.spawn(command[, args][, options])@command：要执行的命令@args：参数列表（可选）@options：配置对象（可选）spawn方法使用给定的command命令来产生一个子进程，args为命令行参数，如果省略，则默认...
查阅了很多文档都无法解决，于是自己后面慢慢尝试了一下，认真一步一步观察安装的提示，直到看到最后一句提示：
 Should we run `npm install` for you after the project has been created? (recommended) npm
于是这次我选择了no，自己手动insta