You cannot select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
136 lines
3.1 KiB
JavaScript
136 lines
3.1 KiB
JavaScript
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)
|
|
}
|