Function dedent

src/utils.ts:118–166

(
  strings: string | string[],
  ...values: string[]
)

const errorLog = createLogger('error');

export const dedent = (
  strings: string | string[],
  ...values: string[]
): string => {
  const raw = Array.isArray(strings) ? strings : [strings];

  let result = '';

  for (let i = 0; i < raw.length; i++) {
    result += raw[i]
      // join lines when there is a suppressed newline
      .replace(/\\\n[ \t]*/g, '')
      // handle escaped back-ticks
      .replace(/\\`/g, '`');

    if (i < values.length) {
      result += values[i];
    }
  }

  // now strip indentation
  const lines = result.split('\n');
  let mIndent: number | null = null;
  lines.forEach((l) => {
    const m = l.match(/^(\s+)\S+/);
    if (m) {
      const indent = m[1].length;
      if (!mIndent) {
        // this is the first indented line
        mIndent = indent;
      } else {
        mIndent = Math.min(mIndent, indent);
      }
    }
  });

  if (mIndent !== null) {
    const m = mIndent;
    result = lines.map((l) => (l[0] === ' ' ? l.slice(m) : l)).join('\n');
  }

  return (
    result
      // dedent eats leading and trailing whitespace too
      .trim()
      // handle escaped newlines at the end to ensure they don't get stripped too
      .replace(/\\n/g, '\n')
  );
};

export const isConnected = (connection: Duplex | ServerResponse): boolean =>
  isHTTP(connection) ? !!connection.socket?.writable : !!connection.writable;