30 lines
802 B
JavaScript
30 lines
802 B
JavaScript
var path = require('path');
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module.exports = function (basedir, relfiles) {
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if (relfiles) {
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var files = relfiles.map(function (r) {
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return path.resolve(basedir, r);
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});
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}
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else {
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var files = basedir;
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}
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var res = files.slice(1).reduce(function (ps, file) {
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if (!file.match(/^([A-Za-z]:)?\/|\\/)) {
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throw new Error('relative path without a basedir');
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}
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var xs = file.split(/\/+|\\+/);
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for (
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var i = 0;
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ps[i] === xs[i] && i < Math.min(ps.length, xs.length);
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i++
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);
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return ps.slice(0, i);
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}, files[0].split(/\/+|\\+/));
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// Windows correctly handles paths with forward-slashes
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return res.length > 1 ? res.join('/') : '/'
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};
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