| 5 | |
| 6 | /** Returns the number of files in the given directory. */ |
| 7 | var countFiles = function (dir, callback) { |
| 8 | |
| 9 | // Get all directory entries. |
| 10 | fs.readdir(dir, function (err, files) { |
| 11 | if (err) { callback(err); return; } |
| 12 | var paths = _.map(files, function (file) { return path.join(dir, file); }); |
| 13 | (function getStatsInParallel(callback) { |
| 14 | var stats = []; |
| 15 | var remaining = paths.length; |
| 16 | if (remaining === 0) { |
| 17 | |
| 18 | // Directory is empty. |
| 19 | callback(null, stats); |
| 20 | return; |
| 21 | } else { |
| 22 | |
| 23 | // Get all file stats in parallel. |
| 24 | paths.forEach(function (path, i) { |
| 25 | fs.stat(path, function (err, stat) { |
| 26 | if (remaining === 0) return; |
| 27 | if (err) { |
| 28 | remaining = 0; |
| 29 | callback(err); |
| 30 | } else { |
| 31 | stats[i] = stat; |
| 32 | --remaining; |
| 33 | if (remaining === 0) callback(null, stats); |
| 34 | } |
| 35 | }); |
| 36 | }); |
| 37 | } |
| 38 | })(function (err, stats) { |
| 39 | |
| 40 | // Count the files. |
| 41 | if (err) { callback(err); return; } |
| 42 | var result = _.filter(stats, function (stat) { return stat.isFile(); }).length; |
| 43 | callback(null, result); |
| 44 | }); |
| 45 | }); |
| 46 | } |
| 47 | |
| 48 | |
| 49 | module.exports = countFiles; |