Beispiel #1
0
  /**
   * Resolves a module id to a package resource. If module id consists of just one term and resolves
   * to a package directory, the main module of the package is returned. If the module id consists
   * of several terms and the first term resolves to a package directory, the remaining part of the
   * module id is resolved against the "lib" directory of the package.
   *
   * @link http://nodejs.org/docs/v0.4.4/api/modules.html#folders_as_Modules
   * @param moduleName the name of the package to load
   * @param localPath the path of the resource issuing this call
   * @return the location of the package's main module
   * @throws IOException an unrecoverable I/O exception occurred while reading the package
   */
  protected Resource loadPackage(String moduleName, Repository localPath) throws IOException {

    int slash = 0;
    String packageName, remainingName;

    do {
      slash = moduleName.indexOf('/', slash + 1);
      if (slash == -1) {
        packageName = moduleName;
        remainingName = null;
      } else {
        packageName = moduleName.substring(0, slash);
        if (".".equals(packageName) || "..".equals(packageName)) continue;
        remainingName = moduleName.substring(slash + 1);
      }

      Resource json = findResource(packageName + "/package.json", null, localPath);

      if (json != null && json.exists()) {

        Scriptable obj = parseJsonResource(json);
        Repository parent = json.getParentRepository();
        String moduleId;
        Resource res;

        if (remainingName == null) {
          // get the main module of this package
          moduleId = getStringProperty(obj, "main", null);
          if (moduleId != null) {
            // optimize for the common case where main module
            // property links to the exact file name
            res = parent.getResource(moduleId);
            if (res != null && res.exists()) return res;
          }
        } else {
          // map remaining name to libs directory
          String lib = "lib";
          Object dirs = ScriptableObject.getProperty(obj, "directories");
          if (dirs instanceof Scriptable) {
            lib = getStringProperty((Scriptable) dirs, "lib", "lib");
          }
          moduleId = lib + "/" + remainingName;
        }

        if (moduleId != null) {
          for (ModuleLoader loader : loaders) {
            res = parent.getResource(moduleId + loader.getExtension());
            if (res != null && res.exists()) return res;
          }
          if (remainingName != null) {
            res = parent.getResource(moduleId);
            if (res != null && res.exists()) return res;
          }
        }
      }

    } while (slash != -1);

    return findResource(moduleName + "/index", loaders, localPath);
  }
Beispiel #2
0
 /**
  * Search for a repository in the local path, or the main repository path.
  *
  * @param path the repository name
  * @param localPath a repository to look first
  * @return the repository
  * @throws IOException if an I/O error occurred
  */
 public Repository findRepository(String path, Repository localPath) throws IOException {
   // To be consistent, always return absolute repository if path is absolute
   // if we make this dependent on whether files exist we introduce a lot of
   // vague and undetermined behaviour.
   File file = new File(path);
   if (file.isAbsolute()) {
     return new FileRepository(file);
   }
   if (localPath != null) {
     Repository repository = localPath.getChildRepository(path);
     if (repository != null && repository.exists()) {
       return repository;
     }
   }
   return config.getRepository(normalizePath(path));
 }
Beispiel #3
0
 /**
  * Search for a resource in a local path, or the main repository path.
  *
  * @param path the resource name
  * @param loaders optional list of module loaders
  * @param localRoot a repository to look first
  * @return the resource
  * @throws IOException if an I/O error occurred
  */
 public Resource findResource(String path, ModuleLoader[] loaders, Repository localRoot)
     throws IOException {
   // Note: as an extension to the CommonJS modules API
   // we allow absolute module paths for resources
   File file = new File(path);
   if (file.isAbsolute()) {
     Resource res;
     outer:
     if (loaders != null) {
       // loaders must contain at least one loader
       assert loaders.length > 0 && loaders[0] != null;
       for (ModuleLoader loader : loaders) {
         res = new FileResource(path + loader.getExtension());
         if (res.exists()) {
           break outer;
         }
       }
       res = new FileResource(path + loaders[0].getExtension());
     } else {
       res = new FileResource(file);
     }
     res.setAbsolute(true);
     return res;
   } else if (localRoot != null && (path.startsWith("./") || path.startsWith("../"))) {
     String newpath = localRoot.getRelativePath() + path;
     return findResource(newpath, loaders, null);
   } else {
     return config.getResource(normalizePath(path), loaders);
   }
 }
Beispiel #4
0
 /**
  * Return a shell scope for interactive evaluation
  *
  * @return a shell scope
  * @throws IOException an I/O related exception occurred
  */
 public Scriptable getShellScope(RingoWorker worker) throws IOException {
   Repository repository = new FileRepository("");
   repository.setAbsolute(true);
   Scriptable protoScope = mainScope != null ? mainScope : globalScope;
   return new ModuleScope("<shell>", repository, protoScope, worker);
 }