Function parseFrontmatter

harness/src/specs.mjs:19–72

(markdown)

}

export function parseFrontmatter(markdown) {
  const match = markdown.match(/^---\n([\s\S]*?)\n---(?:\n|$)/);
  if (!match) {
    throw new Error('Spec must start with Markdown frontmatter');
  }

  const data = {};
  let currentKey = null;
  let nestedKey = null;

  for (const rawLine of match[1].split('\n')) {
    if (!rawLine.trim() || rawLine.trimStart().startsWith('#')) continue;
    const indent = rawLine.match(/^ */)?.[0].length ?? 0;
    const line = rawLine.trim();

    if (indent === 0) {
      const keyMatch = line.match(/^([A-Za-z0-9_-]+):(.*)$/);
      if (!keyMatch) continue;
      const [, key, rawValue] = keyMatch;
      currentKey = key;
      nestedKey = null;
      data[key] = rawValue.trim() ? parseScalar(rawValue) : [];
      continue;
    }

    if (indent === 2 && line.startsWith('- ')) {
      if (!currentKey) continue;
      if (!Array.isArray(data[currentKey])) data[currentKey] = [];
      data[currentKey].push(parseScalar(line.slice(2)));
      continue;
    }

    if (indent === 2) {
      const keyMatch = line.match(/^([A-Za-z0-9_-]+):(.*)$/);
      if (!keyMatch || !currentKey) continue;
      const [, key, rawValue] = keyMatch;
      if (!data[currentKey] || Array.isArray(data[currentKey])) data[currentKey] = {};
      nestedKey = key;
      data[currentKey][key] = rawValue.trim() ? parseScalar(rawValue) : [];
      continue;
    }

    if (indent === 4 && line.startsWith('- ') && currentKey && nestedKey) {
      if (!data[currentKey] || Array.isArray(data[currentKey])) data[currentKey] = {};
      if (!Array.isArray(data[currentKey][nestedKey])) data[currentKey][nestedKey] = [];
      data[currentKey][nestedKey].push(parseScalar(line.slice(2)));
    }
  }

  return {
    data,
    body: markdown.slice(match[0].length).trim(),
  };
}

export async function loadSpec(specPath) {
  const fullPath = path.resolve(ROOT, specPath);