aaac7fed
 liuqimichale
add
|
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)
}
|
