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which (1.3.1)

Published 2026-02-24 14:08:37 +00:00 by atheaadmin

Installation

Setup this registry in your project .npmrc file:

registry=

To install the package using npm, run the following command:

npm install which@1.3.1

or add it to the package.json file:

"which": "1.3.1"

For more information on the npm registry, see the documentation.

About this package

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')

// if nothrow option is used, returns null if not found
resolved = which.sync('node', {nothrow: true})

// 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)
})

CLI USAGE

Same as the BSD which(1) binary.

usage: which [-as] program ...

OPTIONS

You may pass an options object as the second argument.

• path: Use instead of the PATH environment variable.
• pathExt: Use instead of the PATHEXT environment variable.
• all: Return all matches, instead of just the first one. Note that this means the function returns an array of strings instead of a single string.

Dependencies

Dependencies

ID	Version
isexe	^2.0.0

Development Dependencies

ID	Version
mkdirp	^0.5.0
rimraf	^2.6.2
tap	^12.0.1

Details

npm

2026-02-24 14:08:37 +00:00

0

Isaac Z. Schlueter

Project Site

ISC

4.1 KiB

Assets (1)

which-1.3.1.tgz 4.1 KiB

Versions (2) View all

2.0.2 2026-02-24

1.3.1 2026-02-24