vscode 源码学习 - 启动、运行、修改

启动和运行

在 mac 上我们 clone 了代码，运行的时候发现一堆错误：


No receipt for 'com.apple.pkg.CLTools_Executables' found at '/'.

No receipt for 'com.apple.pkg.DeveloperToolsCLILeo' found at '/'.

No receipt for 'com.apple.pkg.DeveloperToolsCLI' found at '/'.

gyp: No Xcode or CLT version detected!
gyp ERR! configure error 
gyp ERR! stack Error: `gyp` failed with exit code: 1
gyp ERR! stack     at ChildProcess.onCpExit (/xxxxxxxxxx/.nvm/versions/node/v12.13.0/lib/node_modules/npm/node_modules/node-gyp/lib/configure.js:351:16)
gyp ERR! stack     at ChildProcess.emit (events.js:210:5)
gyp ERR! stack     at Process.ChildProcess._handle.onexit (internal/child_process.js:272:12)
gyp ERR! System Darwin 19.6.0

在这里找到了原因和解决方案：https://www.cnblogs.com/coolestcode/p/13389408.html

我这里执行了一下：sudo rm -rf /Library/Developer/CommandLineTools 这个就好了，yarn install 过程稍微有点慢，不急。

可能并不会一番风顺，你可能还会遇到这样的现象：

yarn run v1.22.4
$ node build/lib/electron
Error creating download stream to download electron-v11.0.2-darwin-x64.zip
internal/streams/legacy.js:59
      throw er; // Unhandled stream error in pipe.
      ^

Error: Request failed with code 403
    at Request.<anonymous> (.xxxxxx/vscode/node_modules/github-releases-ms/lib/github.js:56:25)
    at Request.emit (events.js:210:5)
    at Request.onRequestResponse (xxxxx/vscode/node_modules/request/request.js:1066:10)
    at ClientRequest.emit (events.js:210:5)
    at HTTPParser.parserOnIncomingClient [as onIncoming] (_http_client.js:583:27)
    at HTTPParser.parserOnHeadersComplete (_http_common.js:115:17)
    at TLSSocket.socketOnData (_http_client.js:456:22)
    at TLSSocket.emit (events.js:210:5)
    at addChunk (_stream_readable.js:308:12)
    at readableAddChunk (_stream_readable.js:289:11)
error Command failed with exit code 1.
info Visit https://yarnpkg.com/en/docs/cli/run for documentation about this command.

$ node build/lib/electron
internal/streams/legacy.js:59
      throw er; // Unhandled stream error in pipe.
      ^

Error: API rate limit exceeded for 61.120.150.78. (But here's the good news: Authenticated requests get a higher rate limit. Check out the documentation for more details.)
    at Request._callback (xxx/vscode/node_modules/github-releases-ms/lib/github.js:83:17)
    at Request.self.callback (xxx/vscode/node_modules/request/request.js:185:22)
    at Request.emit (events.js:210:5)
    at Request.<anonymous> (xxxxx/vscode/node_modules/request/request.js:1161:10)
    at Request.emit (events.js:210:5)
    at IncomingMessage.<anonymous> (xxxx/vscode/node_modules/request/request.js:1083:12)
    at Object.onceWrapper (events.js:299:28)
    at IncomingMessage.emit (events.js:215:7)
    at endReadableNT (_stream_readable.js:1183:12)
    at processTicksAndRejections (internal/process/task_queues.js:80:21)
error Command failed with exit code 1.

但我好像啥也没做，再多试了几次就好了：

➜  vscode git:(master) ✗ ./scripts/code.sh
yarn run v1.22.4
$ node build/lib/electron
↓ ffmpeg-v11.0.2-darwin-x64.zip [====================] 100%
Downloaded ffmpeg-v11.0.2-darwin-x64.zip
↓ electron-v11.0.2-darwin-x64.zip [======--------------] 29%

估计是服务不稳定～

我们终于跑起来了

vscode 源码学习 - 启动、运行、修改

开发和调试

我们希望修改代码生效的话，则：

yarn watch

可能再次启动的时候：./scripts/code.sh 会报：

[Error: ENOENT: no such file or directory, open 'xxxxx/vscode/out/vs/code/electron-main/main.js'] {
  errno: -2,
  code: 'ENOENT',
  syscall: 'open',
  path: 'xxxxx/vscode/out/vs/code/electron-main/main.js',
  phase: 'loading',
  moduleId: 'vs/code/electron-main/main',
  neededBy: [ '===anonymous1===' ]
}

等待 watch 出现：Finished compilation extensions with 0 errors after 39224ms 就好了。

我们可以修改一句话试试：src/vs/code/electron-main/app/ts增加一句：

  console.log('hello, i am going to learning vscode');

constructor(
    private readonly mainIpcServer: Server,
    private readonly userEnv: IProcessEnvironment,
    @IInstantiationService private readonly instantiationService: IInstantiationService,
    @ILogService private readonly logService: ILogService,
    @IEnvironmentMainService private readonly environmentService: IEnvironmentMainService,
    @ILifecycleMainService private readonly lifecycleMainService: ILifecycleMainService,
    @IConfigurationService private readonly configurationService: IConfigurationService,
    @IStateService private readonly stateService: IStateService
) {
    super();
    console.log('hello, i am going to learning vscode');
    this.registerListeners();
}

因此，可以看到打出了日志：

yarn run v1.22.4
$ node build/lib/electron
✨  Done in 0.79s.
[11:43:17] Syncronizing built-in extensions...
[11:43:17] You can manage built-in extensions with the --builtin flag
[11:43:17] [marketplace] ms-vscode.node-debug@1.44.14 ✔︎
[11:43:17] [marketplace] ms-vscode.node-debug2@1.42.5 ✔︎
[11:43:17] [marketplace] ms-vscode.references-view@0.0.73 ✔︎
[11:43:17] [marketplace] ms-vscode.js-debug-companion@1.0.8 ✔︎
[11:43:17] [marketplace] ms-vscode.js-debug@1.51.0 ✔︎
[11:43:17] [marketplace] ms-vscode.vscode-js-profile-table@0.0.11 ✔︎
[11:43:17] [marketplace] ms-vscode.github-browser@0.0.13 ✔︎
(electron) Sending uncompressed crash reports is deprecated and will be removed in a future version of Electron. Set { compress: true } to opt-in to the new behavior. Crash reports will be uploaded gzipped, which most crash reporting servers support.
hello, i am going to learning vscode
(node:60311) electron: The default of contextIsolation is deprecated and will be changing from false to true in a future release of Electron.  See https://github.com/electron/electron/issues/23506 for more information