Function findNextTableHeader

src/installer/targets/toml.ts:140–167

* Find the byte index of the next `[...]` or `[[...]]` table header * starting from `from`, or return content length when none.

(content: string, from: number)

 * starting from `from`, or return content length when none.
 */
function findNextTableHeader(content: string, from: number): number {
  const state: TomlLexState = { multilineString: null, arrayDepth: 0, inlineTableDepth: 0 };
  let lineStart = from;
  let isHeaderRemainder = true;

  while (lineStart < content.length) {
    const newlineIdx = content.indexOf('\n', lineStart);
    const lineEnd = newlineIdx === -1 ? content.length : newlineIdx;
    const line = content.slice(lineStart, lineEnd);

    if (
      !isHeaderRemainder &&
      state.multilineString === null &&
      state.arrayDepth === 0 &&
      state.inlineTableDepth === 0 &&
      isTomlTableHeader(line)
    ) {
      return lineStart;
    }

    scanTomlLine(line, state);
    if (newlineIdx === -1) break;
    lineStart = newlineIdx + 1;
    isHeaderRemainder = false;
  }

  return content.length;
}

type MultilineStringDelimiter = '"""' | "'''";