Function executeJSLibraryFile

src/modules.mjs:305–356

(filename, contents)

  },

  executeJSLibraryFile(filename, contents) {
    const userLibraryProxy = new Proxy(this.library, {
      set(target, prop, value) {
        target[prop] = value;
        if (!isDecorator(prop)) {
          target[prop + '__user'] = true;
        }
        return true;
      },
    });

    const isUserLibrary = !isBeneath(filename, systemLibdir);
    if (isUserLibrary) {
      debugLog(`executing user JS library: ${filename}`);
    } else {
      debugLog(`exectuing system JS library: ${filename}`);
    }

    let origLibrary;
    // When we parse user libraries also set `__user` attribute
    // on each element so that we can distinguish them later.
    if (isUserLibrary) {
      origLibrary = this.library;
      this.library = userLibraryProxy;
    }
    pushCurrentFile(filename);
    let preprocessedName = filename.replace(/\.\w+$/, '.preprocessed$&')
    if (VERBOSE) {
      preprocessedName = path.join(getTempDir(), path.basename(filename));
    }

    try {
      runInMacroContext(contents, {filename: preprocessedName})
    } catch (e) {
      error(`failure to execute JS library "${filename}":`);
      if (VERBOSE) {
        fs.writeFileSync(preprocessedName, contents);
        error(`preprocessed JS saved to ${preprocessedName}`)
      } else {
        error('use -sVERBOSE to save preprocessed JS');
      }
      throw e;
    } finally {
      popCurrentFile();
      if (origLibrary) {
        this.library = origLibrary;
      }
    }
    if (VERBOSE) {
      fs.rmSync(getTempDir(), { recursive: true, force: true });
    }
  }
};

// options is optional input object containing mergeInto params