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@ionic/utils-subprocess
Advanced tools
@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.
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();
The 'child_process' module is a core Node.js module that provides the ability to spawn child processes. It offers similar functionalities to @ionic/utils-subprocess, such as spawning subprocesses, handling their output, and managing errors. However, @ionic/utils-subprocess provides a more user-friendly API and additional utilities for managing subprocesses.
Execa is a popular npm package for executing shell commands in Node.js. It provides a promise-based API and additional features like improved error handling and better support for cross-platform compatibility. Compared to @ionic/utils-subprocess, Execa offers a more modern and feature-rich API for managing subprocesses.
Cross-spawn is an npm package that provides a cross-platform solution for spawning child processes. It addresses issues with the default 'child_process' module on Windows and offers a consistent API for spawning subprocesses across different operating systems. While @ionic/utils-subprocess also aims to simplify subprocess management, cross-spawn focuses specifically on cross-platform compatibility.
FAQs
Subprocess utils for NodeJS
The npm package @ionic/utils-subprocess receives a total of 124,924 weekly downloads. As such, @ionic/utils-subprocess popularity was classified as popular.
We found that @ionic/utils-subprocess demonstrated a not healthy version release cadence and project activity because the last version was released a year ago. It has 1 open source maintainer collaborating on the project.
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