which
Like which(1) unix command. Find the first instance of an executable in the PATH.
Last updated 19 days ago by isaacs .
ISC · Repository · Bugs · Original npm · Tarball · package.json
$ cnpm install which 
SYNC missed versions from official npm registry.

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
})

// or promise
which('node').then(resolvedPath => { ... }).catch(er => { ... not found ... })

// 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.

Current Tags

  • 2.0.1                                ...           latest (19 days ago)

29 Versions

  • 2.0.1                                ...           19 days ago
  • 2.0.0                                ...           19 days ago
  • 1.3.1                                ...           a year ago
  • 1.3.0                                ...           2 years ago
  • 1.2.14                                ...           3 years ago
  • 1.2.13                                ...           3 years ago
  • 1.2.12                                ...           3 years ago
  • 1.2.11                                ...           3 years ago
  • 1.2.10                                ...           3 years ago
  • 1.2.9                                ...           3 years ago
  • 1.2.8                                ...           3 years ago
  • 1.2.7                                ...           3 years ago
  • 1.2.6                                ...           3 years ago
  • 1.2.5                                ...           3 years ago
  • 1.2.4                                ...           4 years ago
  • 1.2.1                                ...           4 years ago
  • 1.2.0                                ...           4 years ago
  • 1.1.2                                ...           4 years ago
  • 1.1.1                                ...           4 years ago
  • 1.1.0                                ...           4 years ago
  • 1.0.9                                ...           5 years ago
  • 1.0.8                                ...           5 years ago
  • 1.0.7                                ...           5 years ago
  • 1.0.6                                ...           5 years ago
  • 1.0.5                                ...           8 years ago
  • 1.0.3                                ...           8 years ago
  • 1.0.2                                ...           8 years ago
  • 1.0.1                                ...           8 years ago
  • 1.0.0                                ...           8 years ago
Maintainers (1)
Downloads
Today 41,751
This Week 84,860
This Month 584,648
Last Day 43,109
Last Week 232,161
Last Month 727,801
Dependencies (1)
Dev Dependencies (3)
Dependents (1638)

Copyright 2014 - 2016 © taobao.org |