Function createIgnoreMatcher

lib/internal/fs/watchers.js:89–124

* Creates an ignore matcher function from the ignore option. * @param {string | RegExp | Function | Array} ignore - The ignore patterns * @returns {Function | null} A function that returns true if filename should be ignored

(ignore)

 * @returns {Function | null} A function that returns true if filename should be ignored
 */
function createIgnoreMatcher(ignore) {
  if (ignore == null) return null;
  const matchers = ArrayIsArray(ignore) ? ignore : [ignore];
  const compiled = [];

  for (let i = 0; i < matchers.length; i++) {
    const matcher = matchers[i];
    if (typeof matcher === 'string') {
      const mm = new (lazyMinimatch().Minimatch)(matcher, {
        __proto__: null,
        nocase: isWindows || isMacOS,
        windowsPathsNoEscape: true,
        nonegate: true,
        nocomment: true,
        optimizationLevel: 2,
        platform: process.platform,
        // matchBase allows patterns without slashes to match the basename
        // e.g., '*.log' matches 'subdir/file.log'
        matchBase: true,
      });
      ArrayPrototypePush(compiled, (filename) => mm.match(filename));
    } else if (isRegExp(matcher)) {
      ArrayPrototypePush(compiled, (filename) => RegExpPrototypeExec(matcher, filename) !== null);
    } else {
      // Function
      ArrayPrototypePush(compiled, matcher);
    }
  }

  return (filename) => {
    for (let i = 0; i < compiled.length; i++) {
      if (compiled[i](filename)) return true;
    }
    return false;
  };
}

function emitStop(self) {
  self.emit('stop');