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