History

Rebecca Turner c54d057598 deps: upgrade to npm 2.10.1 PR-URL: https://github.com/nodejs/io.js/pull/1763 Reviewed-By: Jeremiah Senkpiel <fishrock123@rocketmail.com>		2015-05-23 19:48:00 -04:00
..
bin	Update npm to 1.1.8	2012-03-13 13:02:02 -07:00
node_modules/is-absolute	deps: upgrade to npm 2.10.1	2015-05-23 19:48:00 -04:00
test	deps: upgrade to npm 2.10.1	2015-05-23 19:48:00 -04:00
LICENSE	npm: upgrade to v2.1.18	2015-01-08 23:49:03 +01:00
README.md	deps: upgrade to npm 2.10.1	2015-05-23 19:48:00 -04:00
package.json	deps: upgrade to npm 2.10.1	2015-05-23 19:48:00 -04:00
which.js	deps: upgrade to npm 2.10.1	2015-05-23 19:48:00 -04:00

README.md

which

Like the unix which utility.

Finds the first instance of a specified executable in the PATH environment variable. Does not cache the results, so hash -r is not needed when the PATH changes.

USAGE

var which = require('which')

// async usage
which('node', function (er, resolvedPath) {
  // er is returned if no "node" is found on the PATH
  // if it is found, then the absolute path to the exec is returned
})

// sync usage
// throws if not found
var resolved = which.sync('node')

// Pass options to override the PATH and PATHEXT environment vars.
which('node', { path: someOtherPath }, function (er, resolved) {
  if (er)
    throw er
  console.log('found at %j', resolved)
})

OPTIONS

If you pass in options, then path and pathExt are relevant.