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

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

import {Scope} from '../Scope';
import {LongOptionName, OptionConfig, OptionMap} from '../types';

function camelCase(value: string): string {
  return value.replace(/-([a-z0-9])/giu, (match, char) => String(char).toUpperCase());
}

export function createScope(
  optionName: LongOptionName,
  optionConfigs: Record<string, OptionConfig>,
  options: OptionMap,
): Scope {
  let name = optionName;
  let negated = false;

  // Check for negated types
  if (name.startsWith('no-')) {
    negated = true;
    name = name.slice(3);
  }

  // Convert option to camel case
  if (name.includes('-')) {
    name = camelCase(name);
  }

  // Create scope
  const scope = new Scope(name, optionConfigs[name]);

  scope.negated = negated;

  // When capturing multiples, we need to persist the array
  // so we can append. Avoid using the default array though.
  if (scope.config.multiple) {
    scope.value = options[name] === scope.config.default ? [] : (options[name] as string);
  }

  return scope;
}