bower/lib/util/validLink.js

var Q = require('q');
var fs = require('./fs');

function validLink(file) {
    // Ensures that a file is a symlink that points
    // to a valid file
    return Q.nfcall(fs.lstat, file)
        .then(function(lstat) {
            if (!lstat.isSymbolicLink()) {
                return [false];
            }

            return Q.nfcall(fs.stat, file).then(function(stat) {
                return [stat];
            });
        })
        .fail(function(err) {
            return [false, err];
        });
}

module.exports = validLink;