export function argv()

in src/core/utils/cli.ts [20:56]

• 26 lines of code
• 10 McCabe index (conditional complexity)

export function argv<T extends string | number | boolean | null>(flag: string): T {
  const flags = process.argv;
  for (let index = 0; index < flags.length; index++) {
    const entry = flags[index];

    // ex: --key=value
    if (entry.startsWith("--")) {
      if (entry.includes("=")) {
        // ex: [--key, value]
        const [key, value] = entry.split("=");
        if (flag === key.trim()) {
          // ex: --key=value --> value
          // ex: --key=      --> null
          return (!!value ? value.trim() : null) as T;
        }
      }
      // ex: --key value
      // ex: --key
      else if (flag === entry.trim()) {
        const nextEntry = flags[index + 1]?.trim();
        // ex: --key
        if (nextEntry === undefined || nextEntry?.startsWith("--")) {
          return true as T;
        }
        // ex: --key value
        else if (!!nextEntry) {
          return nextEntry as T;
        }
      } else {
        // flag wasn't found
        return false as T;
      }
    }
  }

  return null as T;
}