# @simple-libs/child-process-utils

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A small set of utilities for child process.

## Install

```bash
# pnpm
pnpm add @simple-libs/child-process-utils
# yarn
yarn add @simple-libs/child-process-utils
# npm
npm i @simple-libs/child-process-utils
```

## Usage

```ts
import {
  exitCode,
  catchProcessError,
  throwProcessError,
  outputStream,
  output
} from '@simple-libs/child-process-utils'

// Wait for a child process to exit and return its exit code
await exitCode(spawn())
// Returns 0 if the process exited successfully, or the exit code if it failed

// Catch error from a child process
await catchProcessError(spawn())
// Returns the error if the process failed, or null if it succeeded

// Throws an error if the child process exits with a non-zero code.
await throwProcessError(spawn())

// Yields the stdout of a child process.
// It will throw an error if the process exits with a non-zero code.
for await (chunk of outputStream(spawn())) {
  console.log(chunk.toString())
}

// Collects the stdout of a child process into a single Buffer.
// It will throw an error if the process exits with a non-zero code.
await output(spawn())
// Returns a Buffer with the stdout of the process
```