Function ensureDynamicLanguages

src/services/code-graph.ts:474–541

()

}

export function ensureDynamicLanguages(): void {
  if (dynamicLangsRegistered) return;
  dynamicLangsRegistered = true;

  try {
    const survivors: Record<string, AstGrepLangModule> = {};

    const langPackages: Array<[string, string]> = [
      ["python",  "@ast-grep/lang-python"],
      ["go",      "@ast-grep/lang-go"],
      ["java",    "@ast-grep/lang-java"],
      ["rust",    "@ast-grep/lang-rust"],
      ["c",       "@ast-grep/lang-c"],
      ["cpp",     "@ast-grep/lang-cpp"],
      ["csharp",  "@ast-grep/lang-csharp"],
      ["ruby",    "@ast-grep/lang-ruby"],
      ["kotlin",  "@ast-grep/lang-kotlin"],
      ["swift",   "@ast-grep/lang-swift"],
      ["scala",   "@ast-grep/lang-scala"],
      ["bash",    "@ast-grep/lang-bash"],
      ["php",     "@ast-grep/lang-php"],
      ["lua",     "@ast-grep/lang-lua"],
      ["dart",    "@ast-grep/lang-dart"],
    ];

    for (const [name, pkg] of langPackages) {
      try {
        const mod = esmRequire(pkg) as AstGrepLangModule;
        // Pre-validate the lazy `libraryPath` getter. `registerDynamicLanguage`
        // accesses this property for every entry it receives, and a single
        // throwing getter aborts the entire batch atomically (issue #43).
        // Touching the getter here, inside the per-grammar try/catch, isolates
        // a missing-prebuild failure to that one grammar so the rest can still
        // be registered. The getter caches its result inside the package, so
        // this is not duplicated work.
        void mod.libraryPath;
        survivors[name] = mod;
        loadedDynamicLanguages.add(name);
      } catch (err) {
        const message = err instanceof Error ? err.message : String(err);
        failedDynamicLanguages.set(name, message);
        logger.warn("ast-grep grammar failed to load", { name, error: message });
      }
    }

    if (Object.keys(survivors).length > 0) {
      registerDynamicLanguage(survivors);
      logger.info("Registered dynamic ast-grep languages", {
        languages: [...loadedDynamicLanguages].sort(),
      });
    } else {
      logger.warn(
        "No dynamic ast-grep grammars loaded; PHP, Python, JVM and other dynamic languages will fall through to <module>-only extraction",
      );
    }
    if (failedDynamicLanguages.size > 0) {
      logger.warn(
        "Some dynamic ast-grep grammars failed to load; affected languages will produce only <module>-level symbols",