Function loadSourceRules

scripts/sync/build.ts:185–219

(
  sources: SourceConfig[],
  baseDir: string,
  fetcher: Fetcher,
  cache?: ContentCache
)

  }
  if (Array.isArray(value)) {
    return value;
  }
  return [];
}

async function loadSourceRules(
  sources: SourceConfig[],
  baseDir: string,
  fetcher: Fetcher,
  cache?: ContentCache
): Promise<RuleSet> {
  const textCache = new Map<string, Promise<string>>();
  const rules = await Promise.all(
    sources.map(async (source) => {
      const text = await loadSourceText(source, baseDir, fetcher, cache);
      const parsed = await parseSourceRules(text, source.parser as SourceParser, {
        sourceUrl: source.type === "remote-text" || source.type === "remote-html" ? source.url : undefined,
        followIncludes: source.followIncludes,
        fetchText: async (url) => {
          const cached = textCache.get(url);
          if (cached) {
            return cached;
          }

          const fetched = fetcher(url);
          textCache.set(url, fetched);
          return fetched;
        }
      });

      if (!source.importAsn) {
        parsed.asn = [];
      }

      return parsed;
    })
  );