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