@jil/args/src/utils/processShortOptionGroup.ts

A convention based argument parsing and formatting library, with strict validation checks

import {ArgsError} from '../errors';
import {AliasMap, OptionConfigMap, OptionMap, ShortOptionName} from '../types';
import {expandShortOption} from './expandShortOption';

/**
 * Expand a group of short option names to a list of long option names.
 */
export function processShortOptionGroup(
  group: string,
  configs: OptionConfigMap,
  options: OptionMap,
  map: AliasMap,
  loose: boolean,
) {
  [...group].forEach(short => {
    const name = expandShortOption(short as ShortOptionName, map, loose);
    const config = configs[name];

    // Loose mode, always be a flag
    if (loose && !config) {
      options[name] = true;

      // Unknown option
    } else if (!config || config.type === 'string') {
      throw new ArgsError('GROUP_UNSUPPORTED_TYPE');

      // Boolean option, flag
    } else if (config.type === 'boolean') {
      options[name] = true;

      // Number option, counter
    } else if (config.type === 'number') {
      if (config.count) {
        options[name] = Number(options[name]) + 1;
      } else {
        throw new ArgsError('GROUP_REQUIRED_COUNT');
      }
    }
  });
}