| 1 |
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| 2 | !function(exports) {
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| 3 | "use strict";
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| 4 | var sep = exports.sep = "/"
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| 5 | exports.dirname = dirname
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| 6 | exports.normalize = normalize
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| 7 | exports.relative = relative
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| 8 | exports.resolve = resolve
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| 9 |
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| 10 | function dirname(path) {
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| 11 | for (var skip = 0, i = path.length; i > 0; ) {
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| 12 | if (path.charCodeAt(--i) !== 47) {
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| 13 | if (skip === 0) skip = i
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| 14 | } else if (skip > 0) break
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| 15 | }
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| 16 | return i > 0 ? path.slice(0, i) : path.charCodeAt(0) === 47 ? "/" : "."
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| 17 | }
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| 18 |
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| 19 | function normalize(path) {
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| 20 | var c
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| 21 | , SLASH = 47
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| 22 | , DOT = 46
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| 23 | , res = path
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| 24 | , abs = res.charCodeAt(0) == SLASH
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| 25 | , len = res.length
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| 26 | , i = len
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| 27 | , cut = len
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| 28 | , up = 0
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| 29 | , last = SLASH
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| 30 |
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| 31 | for (; i > 0; ) {
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| 32 | c = res.charCodeAt(--i)
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| 33 | if (c === SLASH) {
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| 34 | if (cut === 0) {
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| 35 | cut = i
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| 36 | } else if (last !== SLASH && up > 0) {
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| 37 | up--
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| 38 | }
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| 39 | } else if (last === SLASH) {
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| 40 | if (c === DOT) {
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| 41 | if (i > 0) {
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| 42 | c = res.charCodeAt(--i)
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| 43 | if (c === DOT && (i === 0 || res.charCodeAt(i - 1) === SLASH)) {
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| 44 | last = SLASH
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| 45 | i--
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| 46 | up++
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| 47 | } else if (c !== SLASH) {
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| 48 | cut = 0
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| 49 | }
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| 50 | continue
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| 51 | } else {
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| 52 | break
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| 53 | }
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| 54 | }
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| 55 | if (up === 0 && cut > 0) {
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| 56 | if (len === cut) {
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| 57 | if (cut > i + 2) {
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| 58 | res = res.slice(0, res.charCodeAt(len - 1) === SLASH ? i + 2 : i + 1)
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| 59 | }
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| 60 | } else if (cut > i + 1) {
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| 61 | res = res.slice(0, i + 1) + res.slice(cut)
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| 62 | }
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| 63 | cut = 0
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| 64 | }
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| 65 | }
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| 66 | last = c
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| 67 | }
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| 68 | if (cut > 0 && i === 0) {
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| 69 | res = res.slice(abs ? cut : cut + 1)
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| 70 | }
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| 71 | return res
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| 72 | }
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| 73 |
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| 74 | function relative(_from, _to) {
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| 75 | if (_from === _to) return ""
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| 76 |
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| 77 | var last, code1, code2
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| 78 | , from = normalize(clear(_from))
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| 79 | , to = normalize(clear(_to))
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| 80 | , i = 0
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| 81 | , arr = []
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| 82 |
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| 83 | if (from === to) return ""
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| 84 |
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| 85 | for (; code1 === code2; ) {
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| 86 | code1 = from.charCodeAt(i)
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| 87 | if (code1 === 47) last = i
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| 88 | code2 = to.charCodeAt(i++)
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| 89 | }
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| 90 | if (code1 === code1) {
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| 91 | code1 = from.length
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| 92 | for (i = last++; i < code1; ) {
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| 93 | if (from.charCodeAt(i++) === 47) arr.push("..")
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| 94 | }
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| 95 | } else {
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| 96 | last = i
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| 97 | }
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| 98 | if (code2 === code2) {
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| 99 | arr.push(to.slice(last))
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| 100 | }
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| 101 |
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| 102 | return arr.join(sep)
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| 103 | }
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| 104 |
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| 105 | function resolve() {
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| 106 | var args = arguments
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| 107 | , i = args.length
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| 108 | , out = []
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| 109 |
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| 110 | for (; i; ) {
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| 111 | if ((out[i--] = clear(args[i])).charCodeAt(0) === 47) {
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| 112 | out.splice(0, i + 1)
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| 113 | i = 0
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| 114 | }
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| 115 | }
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| 116 | if (!out[0]) out[0] = process.cwd()
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| 117 |
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| 118 | return normalize(out.join(sep))
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| 119 | }
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| 120 |
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| 121 | function clear(path) {
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| 122 | if (typeof path !== "string") {
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| 123 | throw new TypeError("Path must be a string. Got " + typeof path)
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| 124 | }
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| 125 | for (var len = path.length - 1, i = len; path.charCodeAt(i) === 47; i--);
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| 126 | return i !== len ? path.slice(0, i < 0 ? 1 : i + 1) : path
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| 127 | }
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| 128 | }(this)
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| 129 |
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| 130 |
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| 131 |
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