46 lines
1.3 KiB
JavaScript
46 lines
1.3 KiB
JavaScript
var path = require('path');
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var parse = path.parse || require('path-parse'); // eslint-disable-line global-require
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var driveLetterRegex = /^([A-Za-z]:)/;
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var uncPathRegex = /^\\\\/;
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var getNodeModulesDirs = function getNodeModulesDirs(absoluteStart, modules) {
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var prefix = '/';
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if (driveLetterRegex.test(absoluteStart)) {
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prefix = '';
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} else if (uncPathRegex.test(absoluteStart)) {
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prefix = '\\\\';
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}
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var paths = [absoluteStart];
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var parsed = parse(absoluteStart);
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while (parsed.dir !== paths[paths.length - 1]) {
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paths.push(parsed.dir);
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parsed = parse(parsed.dir);
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}
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return paths.reduce(function (dirs, aPath) {
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return dirs.concat(modules.map(function (moduleDir) {
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return path.resolve(prefix, aPath, moduleDir);
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}));
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}, []);
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};
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module.exports = function nodeModulesPaths(start, opts, request) {
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var modules = opts && opts.moduleDirectory
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? [].concat(opts.moduleDirectory)
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: ['node_modules'];
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if (opts && typeof opts.paths === 'function') {
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return opts.paths(
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request,
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start,
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function () { return getNodeModulesDirs(start, modules); },
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opts
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);
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}
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var dirs = getNodeModulesDirs(start, modules);
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return opts && opts.paths ? dirs.concat(opts.paths) : dirs;
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};
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