command-exists
node module to check if a command-line command exists
installation
npm install command-exists
usage
async
var commandExists = require('command-exists');
commandExists('ls', function(err, commandExists) {
if(commandExists) {
// proceed confidently knowing this command is available
}
});
promise
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
});
sync
var commandExistsSync = require('command-exists').sync;
// returns true/false; doesn't throw
if (commandExistsSync('ls')) {
// proceed
} else {
// ...
}
changelog
v1.2.6
Small bugfixes.
v1.2.5
Fix windows bug introduced in 1.2.4.
v1.2.4
Fix potential security issue.
v1.2.0
Add support for promises
v1.1.0
Add synchronous version
v1.0.2
Support for windows