cmd-shim

What is cmd-shim?

The cmd-shim npm package is designed to create command shims (or symbolic links) on Windows and Unix-like systems for node.js scripts. This allows node.js scripts to be executed as if they were native commands in the user's shell, making it easier to use node.js tools across different platforms without worrying about the underlying differences in how executable scripts are handled.

What are cmd-shim's main functionalities?

Creating command shims

This feature allows the creation of a command shim for a node.js script. The code sample demonstrates how to create a shim for a node.js script located at 'path/to/node-script.js' and place the resulting shim at 'path/to/shim'. This makes the script executable as if it were a native command.

const cmdShim = require('cmd-shim');
cmdShim('path/to/node-script.js', 'path/to/shim', function (err) {
  if (err) throw err;
});

Other packages similar to cmd-shim

npx

npx is a package runner tool that comes with npm. It allows you to execute any package from the npm registry without having to install it globally. While npx does not create shims, it provides a similar convenience by allowing direct execution of node.js scripts and commands. Unlike cmd-shim, npx is focused on temporary or one-off execution rather than creating a persistent executable shim.

shelljs

ShellJS is a portable (Windows/Linux/OS X) implementation of Unix shell commands on top of the Node.js API. While it primarily offers a way to script shell commands within Node.js, it shares the cross-platform scripting goal with cmd-shim. However, ShellJS does not specifically focus on creating command shims but rather on providing a wide range of shell commands within Node.js scripts.

README

cmd-shim

The cmd-shim used in npm. Currently npm has this code inlined. It wasn not originally written by me; I simply copied it from the npm repository.

Installation

npm install cmd-shim

API

cmdShim(from, to, cb)

Create a cmd shim at to for the command line program at from. e.g.

var cmdShim = require('cmd-shim');
cmdShim(__dirname + '/cli.js', '/usr/bin/command-name', function (err) {
  if (err) throw err;
});

cmdShim.ifExists(from, to, cb)

The same as above, but will just continue if the file does not exist. Source:

function cmdShimIfExists (from, to, cb) {
  fs.stat(from, function (er) {
    if (er) return cb()
    cmdShim(from, to, cb)
  })
}

Logging

By default, npmlog is used for logging. Log messages are written by default if it fails to write to the output directory. You can disable the logging by calling:

require('npmlog').level('silent');

License

MIT