Function complete

lib/internal/repl/completion.js:200–512

(line, callback)

// logic is skipped when getters or proxies are involved in the expression.
// (see: https://github.com/nodejs/node/issues/57829).
function complete(line, callback) {
  // List of completion lists, one for each inheritance "level"
  let completionGroups = [];
  let completeOn, group;

  // Ignore right whitespace. It could change the outcome.
  line = StringPrototypeTrimStart(line);

  let filter = '';

  let match;
  // REPL commands (e.g. ".break").
  if ((match = RegExpPrototypeExec(/^\s*\.(\w*)$/, line)) !== null) {
    ArrayPrototypePush(completionGroups, ObjectKeys(this.commands));
    completeOn = match[1];
    if (completeOn.length) {
      filter = completeOn;
    }
  } else if ((match = RegExpPrototypeExec(requireRE, line)) !== null) {
    // require('...<Tab>')
    completeOn = match[1];
    filter = completeOn;
    if (this.allowBlockingCompletions) {
      const subdir = match[2] || '';
      const extensions = ObjectKeys(CJSModule._extensions);
      const indexes = ArrayPrototypeMap(extensions,
                                        (extension) => `index${extension}`);
      ArrayPrototypePush(indexes, 'package.json', 'index');

      group = [];
      let paths = [];

      if (completeOn === '.') {
        group = ['./', '../'];
      } else if (completeOn === '..') {
        group = ['../'];
      } else if (RegExpPrototypeExec(/^\.\.?\//, completeOn) !== null) {
        paths = [process.cwd()];
      } else {
        paths = [];
        ArrayPrototypePushApply(paths, module.paths);
        ArrayPrototypePushApply(paths, CJSModule.globalPaths);
      }

      ArrayPrototypeForEach(paths, (dir) => {
        dir = path.resolve(dir, subdir);
        const dirents = gracefulReaddir(dir, { withFileTypes: true }) || [];
        ArrayPrototypeForEach(dirents, (dirent) => {
          if (RegExpPrototypeExec(versionedFileNamesRe, dirent.name) !== null ||
              dirent.name === '.npm') {
            // Exclude versioned names that 'npm' installs.
            return;
          }
          const extension = path.extname(dirent.name);
          const base = StringPrototypeSlice(dirent.name, 0, -extension.length);
          if (!dirent.isDirectory()) {
            if (StringPrototypeIncludes(extensions, extension) &&
                (!subdir || base !== 'index')) {