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adds README section regarding usage in child procs #850

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merged 2 commits into from Oct 13, 2021
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adds README section regarding usage in child procs #850

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adds README section regarding usage in child procs
kristofkalocsai Oct 3, 2021
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Update README.md
kristofkalocsai Oct 4, 2021
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Expand Up @@ -351,6 +351,27 @@ if (debug.enabled) {
You can also manually toggle this property to force the debug instance to be
enabled or disabled.

## Usage in child processes

Due to the way chalk detects if the output is a TTY or not, colors are not shown in child processes when `stderr` is piped. A solution is to pass the `DEBUG_COLORS=1` environment variable to the child process.
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For example:

```javascript
worker = fork(WORKER_WRAP_PATH, [workerPath], {
stdio: [
/* stdin: */ 0,
/* stdout: */ 'pipe',
/* stderr: */ 'pipe',
'ipc',
],
env: Object.assign({}, process.env, {
DEBUG_COLORS: 1 // without this settings, colors won't be shown
}),
});

worker.stderr.pipe(process.stderr, { end: false });
```


## Authors

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