fedtools-utilities/lib/third/readdir.js

Set of utilites for fedtools within nodejs

/**
 * List all files under current folder.
 * Heavily inspered from https://github.com/jergason/recursive-readdir
 *
 * Additions:
 *  - ignore errors on non-files (ENOENT on links for example)
 *  - fixes to follow our eslint rules
 */

var
  fs = require('fs-extra'),
  p = require('path'),
  minimatch = require('minimatch');

function patternMatcher(pattern) {
  return function (path, stats) {
    var minimatcher = new minimatch.Minimatch(pattern, {
      matchBase: true
    });
    return (!minimatcher.negate || stats.isFile()) && minimatcher.match(path);
  };
}

function toMatcherFunction(ignoreEntry) {
  if (typeof ignoreEntry == 'function') {
    return ignoreEntry;
  } else {
    return patternMatcher(ignoreEntry);
  }
}

function readdir(path, ignores, callback) {
  var
    list = [];

  if (typeof ignores == 'function') {
    callback = ignores;
    ignores = [];
  }
  ignores = ignores.map(toMatcherFunction);

  fs.readdir(path, function (err, files) {
    var pending;

    if (err) {
      return callback(err);
    }

    pending = files.length;
    if (!pending) {
      // we are done, woop woop
      return callback(null, list);
    }

    files.forEach(function (file) {
      var
        filePath = p.join(path, file);
      fs.stat(filePath, function (_err, stats) {
        if (_err && _err.code === 'ENOENT') {
          // just ignore the error if the FS says that the file
          // does not exist... broken symlink?
          pending -= 1;
          if (!pending) {
            return callback(null, list);
          }
          return null;
        } else if (_err) {
          return callback(_err);
        }

        function _ignoreMatcher(matcher) {
          return matcher(filePath, stats);
        }

        if (ignores.some(_ignoreMatcher)) {
          pending -= 1;
          if (!pending) {
            return callback(null, list);
          }
          return null;
        }

        if (stats.isDirectory()) {
          readdir(filePath, ignores, function (__err, res) {
            if (__err) {
              return callback(__err);
            }

            list = list.concat(res);
            pending -= 1;
            if (!pending) {
              return callback(null, list);
            }
          });
        } else {
          list.push(filePath);
          pending -= 1;
          if (!pending) {
            return callback(null, list);
          }
        }
      });
    });
  });
}

module.exports = readdir;