Function completionGroupsLoaded

lib/internal/repl/completion.js:463–511

()

  // Will be called when all completionGroups are in place
  // Useful for async autocompletion
  function completionGroupsLoaded() {
    // Filter, sort (within each group), uniq and merge the completion groups.
    if (completionGroups.length && filter) {
      const newCompletionGroups = [];
      const lowerCaseFilter = StringPrototypeToLocaleLowerCase(filter);
      ArrayPrototypeForEach(completionGroups, (group) => {
        const filteredGroup = ArrayPrototypeFilter(group, (str) => {
          // Filter is always case-insensitive following chromium autocomplete
          // behavior.
          return StringPrototypeStartsWith(
            StringPrototypeToLocaleLowerCase(str),
            lowerCaseFilter,
          );
        });
        if (filteredGroup.length) {
          ArrayPrototypePush(newCompletionGroups, filteredGroup);
        }
      });
      completionGroups = newCompletionGroups;
    }

    const completions = [];
    // Unique completions across all groups.
    const uniqueSet = new SafeSet();
    uniqueSet.add('');
    // Completion group 0 is the "closest" (least far up the inheritance
    // chain) so we put its completions last: to be closest in the REPL.
    ArrayPrototypeForEach(completionGroups, (group) => {
      ArrayPrototypeSort(group, (a, b) => (b > a ? 1 : -1));
      const setSize = uniqueSet.size;
      ArrayPrototypeForEach(group, (entry) => {
        if (!uniqueSet.has(entry)) {
          ArrayPrototypeUnshift(completions, entry);
          uniqueSet.add(entry);
        }
      });
      // Add a separator between groups.
      if (uniqueSet.size !== setSize) {
        ArrayPrototypeUnshift(completions, '');
      }
    });

    // Remove obsolete group entry, if present.
    if (completions[0] === '') {
      ArrayPrototypeShift(completions);
    }

    callback(null, [completions, completeOn]);
  }
}

/**