corrade-nucleus-nucleons – Blame information for rev 36

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Rev Author Line No. Line
36 office 1 module.exports = which
2 which.sync = whichSync
3  
4 var isWindows = process.platform === 'win32' ||
5 process.env.OSTYPE === 'cygwin' ||
6 process.env.OSTYPE === 'msys'
7  
8 var path = require('path')
9 var COLON = isWindows ? ';' : ':'
10 var isexe = require('isexe')
11  
12 function getNotFoundError (cmd) {
13 var er = new Error('not found: ' + cmd)
14 er.code = 'ENOENT'
15  
16 return er
17 }
18  
19 function getPathInfo (cmd, opt) {
20 var colon = opt.colon || COLON
21 var pathEnv = opt.path || process.env.PATH || ''
22 var pathExt = ['']
23  
24 pathEnv = pathEnv.split(colon)
25  
26 var pathExtExe = ''
27 if (isWindows) {
28 pathEnv.unshift(process.cwd())
29 pathExtExe = (opt.pathExt || process.env.PATHEXT || '.EXE;.CMD;.BAT;.COM')
30 pathExt = pathExtExe.split(colon)
31  
32  
33 // Always test the cmd itself first. isexe will check to make sure
34 // it's found in the pathExt set.
35 if (cmd.indexOf('.') !== -1 && pathExt[0] !== '')
36 pathExt.unshift('')
37 }
38  
39 // If it has a slash, then we don't bother searching the pathenv.
40 // just check the file itself, and that's it.
41 if (cmd.match(/\//) || isWindows && cmd.match(/\\/))
42 pathEnv = ['']
43  
44 return {
45 env: pathEnv,
46 ext: pathExt,
47 extExe: pathExtExe
48 }
49 }
50  
51 function which (cmd, opt, cb) {
52 if (typeof opt === 'function') {
53 cb = opt
54 opt = {}
55 }
56  
57 var info = getPathInfo(cmd, opt)
58 var pathEnv = info.env
59 var pathExt = info.ext
60 var pathExtExe = info.extExe
61 var found = []
62  
63 ;(function F (i, l) {
64 if (i === l) {
65 if (opt.all && found.length)
66 return cb(null, found)
67 else
68 return cb(getNotFoundError(cmd))
69 }
70  
71 var pathPart = pathEnv[i]
72 if (pathPart.charAt(0) === '"' && pathPart.slice(-1) === '"')
73 pathPart = pathPart.slice(1, -1)
74  
75 var p = path.join(pathPart, cmd)
76 if (!pathPart && (/^\.[\\\/]/).test(cmd)) {
77 p = cmd.slice(0, 2) + p
78 }
79 ;(function E (ii, ll) {
80 if (ii === ll) return F(i + 1, l)
81 var ext = pathExt[ii]
82 isexe(p + ext, { pathExt: pathExtExe }, function (er, is) {
83 if (!er && is) {
84 if (opt.all)
85 found.push(p + ext)
86 else
87 return cb(null, p + ext)
88 }
89 return E(ii + 1, ll)
90 })
91 })(0, pathExt.length)
92 })(0, pathEnv.length)
93 }
94  
95 function whichSync (cmd, opt) {
96 opt = opt || {}
97  
98 var info = getPathInfo(cmd, opt)
99 var pathEnv = info.env
100 var pathExt = info.ext
101 var pathExtExe = info.extExe
102 var found = []
103  
104 for (var i = 0, l = pathEnv.length; i < l; i ++) {
105 var pathPart = pathEnv[i]
106 if (pathPart.charAt(0) === '"' && pathPart.slice(-1) === '"')
107 pathPart = pathPart.slice(1, -1)
108  
109 var p = path.join(pathPart, cmd)
110 if (!pathPart && /^\.[\\\/]/.test(cmd)) {
111 p = cmd.slice(0, 2) + p
112 }
113 for (var j = 0, ll = pathExt.length; j < ll; j ++) {
114 var cur = p + pathExt[j]
115 var is
116 try {
117 is = isexe.sync(cur, { pathExt: pathExtExe })
118 if (is) {
119 if (opt.all)
120 found.push(cur)
121 else
122 return cur
123 }
124 } catch (ex) {}
125 }
126 }
127  
128 if (opt.all && found.length)
129 return found
130  
131 if (opt.nothrow)
132 return null
133  
134 throw getNotFoundError(cmd)
135 }