aaac7fed
 liuqimichale
add
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var path = require('path');
var fs = require('fs');
var parse = path.parse || require('path-parse');
module.exports = function nodeModulesPaths(start, opts) {
var modules = opts && opts.moduleDirectory
? [].concat(opts.moduleDirectory)
: ['node_modules'];
// ensure that `start` is an absolute path at this point,
// resolving against the process' current working directory
var absoluteStart = path.resolve(start);
if (opts && opts.preserveSymlinks === false) {
try {
absoluteStart = fs.realpathSync(absoluteStart);
} catch (err) {
if (err.code !== 'ENOENT') {
throw err;
}
}
}
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);
}
var dirs = paths.reduce(function (dirs, aPath) {
return dirs.concat(modules.map(function (moduleDir) {
return path.join(prefix, aPath, moduleDir);
}));
}, []);
return opts && opts.paths ? dirs.concat(opts.paths) : dirs;
};
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