/usr/lib/nodejs/which/which.js is in node-which 1.3.0-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 | module.exports = which
which.sync = whichSync
var isWindows = process.platform === 'win32' ||
process.env.OSTYPE === 'cygwin' ||
process.env.OSTYPE === 'msys'
var path = require('path')
var COLON = isWindows ? ';' : ':'
var isexe = require('isexe')
function getNotFoundError (cmd) {
var er = new Error('not found: ' + cmd)
er.code = 'ENOENT'
return er
}
function getPathInfo (cmd, opt) {
var colon = opt.colon || COLON
var pathEnv = opt.path || process.env.PATH || ''
var pathExt = ['']
pathEnv = pathEnv.split(colon)
var pathExtExe = ''
if (isWindows) {
pathEnv.unshift(process.cwd())
pathExtExe = (opt.pathExt || process.env.PATHEXT || '.EXE;.CMD;.BAT;.COM')
pathExt = pathExtExe.split(colon)
// Always test the cmd itself first. isexe will check to make sure
// it's found in the pathExt set.
if (cmd.indexOf('.') !== -1 && pathExt[0] !== '')
pathExt.unshift('')
}
// If it has a slash, then we don't bother searching the pathenv.
// just check the file itself, and that's it.
if (cmd.match(/\//) || isWindows && cmd.match(/\\/))
pathEnv = ['']
return {
env: pathEnv,
ext: pathExt,
extExe: pathExtExe
}
}
function which (cmd, opt, cb) {
if (typeof opt === 'function') {
cb = opt
opt = {}
}
var info = getPathInfo(cmd, opt)
var pathEnv = info.env
var pathExt = info.ext
var pathExtExe = info.extExe
var found = []
;(function F (i, l) {
if (i === l) {
if (opt.all && found.length)
return cb(null, found)
else
return cb(getNotFoundError(cmd))
}
var pathPart = pathEnv[i]
if (pathPart.charAt(0) === '"' && pathPart.slice(-1) === '"')
pathPart = pathPart.slice(1, -1)
var p = path.join(pathPart, cmd)
if (!pathPart && (/^\.[\\\/]/).test(cmd)) {
p = cmd.slice(0, 2) + p
}
;(function E (ii, ll) {
if (ii === ll) return F(i + 1, l)
var ext = pathExt[ii]
isexe(p + ext, { pathExt: pathExtExe }, function (er, is) {
if (!er && is) {
if (opt.all)
found.push(p + ext)
else
return cb(null, p + ext)
}
return E(ii + 1, ll)
})
})(0, pathExt.length)
})(0, pathEnv.length)
}
function whichSync (cmd, opt) {
opt = opt || {}
var info = getPathInfo(cmd, opt)
var pathEnv = info.env
var pathExt = info.ext
var pathExtExe = info.extExe
var found = []
for (var i = 0, l = pathEnv.length; i < l; i ++) {
var pathPart = pathEnv[i]
if (pathPart.charAt(0) === '"' && pathPart.slice(-1) === '"')
pathPart = pathPart.slice(1, -1)
var p = path.join(pathPart, cmd)
if (!pathPart && /^\.[\\\/]/.test(cmd)) {
p = cmd.slice(0, 2) + p
}
for (var j = 0, ll = pathExt.length; j < ll; j ++) {
var cur = p + pathExt[j]
var is
try {
is = isexe.sync(cur, { pathExt: pathExtExe })
if (is) {
if (opt.all)
found.push(cur)
else
return cur
}
} catch (ex) {}
}
}
if (opt.all && found.length)
return found
if (opt.nothrow)
return null
throw getNotFoundError(cmd)
}
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