command-exists

command-exists
==============

node module to check if a command-line command exists

installation

``bash
npm install command-exists
`

usage

$3

`js
var commandExists = require('command-exists');

commandExists('ls', function(err, commandExists) {

if(commandExists) {
// proceed confidently knowing this command is available
}

});
`


$3


`js
var commandExists = require('command-exists');

// invoked without a callback, it returns a promise
commandExists('ls')
.then(function(command){
// proceed
}).catch(function(){
// command doesn't exist
});
`

$3


`js
var commandExistsSync = require('command-exists').sync;
// returns true/false; doesn't throw
if (commandExistsSync('ls')) {
// proceed
} else {
// ...
}

``

changelog

$3

Removes unnecessary printed output on windows.

$3

Small bugfixes.

$3

Fix windows bug introduced in 1.2.4.

$3

Fix potential security issue.

$3

Add support for promises

$3

Add synchronous version

$3

Support for windows