https://github.com/kenotron/capturing-inherit

https://github.com/kenotron/capturing-inherit

Last synced: 10 days ago
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• Host: GitHub
• URL: https://github.com/kenotron/capturing-inherit
• Owner: kenotron
• Created: 2022-06-18T17:27:29.000Z (over 2 years ago)
• Default Branch: main
• Last Pushed: 2022-06-18T17:45:18.000Z (over 2 years ago)
• Last Synced: 2024-11-07T21:11:48.327Z (2 months ago)
• Language: JavaScript
• Size: 1.95 KB
• Stars: 0
• Watchers: 2
• Forks: 0
• Open Issues: 0
• Metadata Files:
  • Readme: README.md

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README

        
# How to capture a child_process's inherit outputs

https://twitter.com/kenneth_chau/status/1538216216572985346?s=20&t=95R6BkA_EqXiN52s06x7ig

## 1. fork a `runner.js` w/ `stdio: pipe` + add `on('data')` handler

```js

const forked = fork("runner.js", {

  stdio: ["ignore", "pipe", "pipe", "ipc"],

});

```

## 2. `runner.js`, in turn executes a command (even `child_process` spawn or exec with inherit)

```js

execSync(`npm run test`, {

  stdio: ["inherit", "inherit", "inherit"],

  env: process.env,

});

```

## 3. Capture output from pipe: `index.js`

```js

let msgs = [];

forked.stdout.on("data", (data) => {

  msgs.push(data);

});

forked.on("exit", (code, signal) => {

  console.log(`${msgs.join("")}`);

});

```