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@ionic/utils-subprocess

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@ionic/utils-subprocess

Subprocess utils for NodeJS

  • 3.0.1
  • latest
  • Source
  • npm
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400K
decreased by-6.67%
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What is @ionic/utils-subprocess?

@ionic/utils-subprocess is a utility package designed to facilitate the execution and management of subprocesses in Node.js applications. It provides a set of tools to spawn, manage, and interact with child processes, making it easier to handle tasks that require running external commands or scripts.

What are @ionic/utils-subprocess's main functionalities?

Spawning a Subprocess

This feature allows you to spawn a new subprocess to run a command. In this example, the 'ls -la' command is executed, and the output is logged to the console.

const { spawn } = require('@ionic/utils-subprocess');

async function runCommand() {
  const subprocess = spawn('ls', ['-la']);
  subprocess.stdout.on('data', (data) => {
    console.log(`stdout: ${data}`);
  });
  subprocess.stderr.on('data', (data) => {
    console.error(`stderr: ${data}`);
  });
  const code = await subprocess;
  console.log(`Child process exited with code ${code}`);
}

runCommand();

Handling Subprocess Output

This feature demonstrates how to handle the output of a subprocess. In this example, the 'node -v' command is executed to get the Node.js version, and the output is captured and logged.

const { spawn } = require('@ionic/utils-subprocess');

async function runCommand() {
  const subprocess = spawn('node', ['-v']);
  let output = '';
  subprocess.stdout.on('data', (data) => {
    output += data;
  });
  const code = await subprocess;
  console.log(`Node.js version: ${output.trim()}`);
}

runCommand();

Error Handling in Subprocess

This feature shows how to handle errors when spawning a subprocess. In this example, an attempt is made to run a nonexistent command, and the error is caught and logged.

const { spawn } = require('@ionic/utils-subprocess');

async function runCommand() {
  try {
    const subprocess = spawn('nonexistent-command');
    subprocess.stdout.on('data', (data) => {
      console.log(`stdout: ${data}`);
    });
    subprocess.stderr.on('data', (data) => {
      console.error(`stderr: ${data}`);
    });
    const code = await subprocess;
    console.log(`Child process exited with code ${code}`);
  } catch (error) {
    console.error(`Failed to start subprocess: ${error.message}`);
  }
}

runCommand();

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Package last updated on 19 Dec 2023

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