예제 #1
0
 /**
  * Detect Unicode BOM in a source file.
  *
  * @param data Binary data of source file.
  * @param path The canonical path of source file.
  */
 private void detectBOM(byte[] data, String path) {
   if (data.length > 2
       && (byte) (data[0] ^ 0xEF) == 0
       && (byte) (data[1] ^ 0xBB) == 0
       && (byte) (data[2] ^ 0xBF) == 0) {
     App.exit("UTF8 BOM was found in " + path);
   } else if (data.length > 1 && (byte) (data[0] ^ 0xFE) == 0 && (byte) (data[1] ^ 0xFF) == 0) {
     App.exit("UTF16BE BOM was found in " + path);
   } else if (data.length > 1 && (byte) (data[0] ^ 0xFF) == 0 && (byte) (data[1] ^ 0xFE) == 0) {
     App.exit("UTF16LE BOM was found in " + path);
   }
 }
예제 #2
0
  /**
   * Get dependencies of a source file.
   *
   * @param path The canonical path of source file.
   * @return Path of dependencies.
   */
  private ArrayList<String> getDependencies(String path) {
    if (!dependenceMap.containsKey(path)) {
      ArrayList<String> dependencies = new ArrayList<String>();
      Matcher m = PATTERN_REQUIRE.matcher(read(path, charset));

      while (m.find()) {
        // Decide which root path to use.
        // Path wrapped in <> is related to root path.
        // Path wrapped in "" is related to parent folder of the source file.
        String root = null;

        if (m.group(1).equals("<")) {
          root = this.root;
        } else {
          root = new File(path).getParent();
        }

        // Get path of required file.
        String required = m.group(2);

        File f = new File(root, required);

        if (f.exists()) {
          dependencies.add(canonize(f));
        } else {
          App.exit("Cannot find required file " + required + " in " + path);
        }
      }

      dependenceMap.put(path, dependencies);
    }

    return dependenceMap.get(path);
  }
예제 #3
0
  /**
   * Get the canonical path of a file.
   *
   * @param f The file.
   * @return The canonical path.
   */
  private String canonize(File f) {
    String path = null;

    try {
      path = f.getCanonicalPath();
    } catch (IOException e) {
      App.exit(e);
    }

    return path;
  }
예제 #4
0
  /**
   * Get text content of a source file.
   *
   * @param path The canonical path of source file.
   * @param charset Source file encoding.
   * @return Source file content.
   */
  public String read(String path, String charset) {
    String str = null;
    byte[] bin = read(path);

    try {
      str = Charset.forName(charset).newDecoder().decode(ByteBuffer.wrap(bin)).toString();
    } catch (CharacterCodingException e) {
      App.exit("Cannot read " + path + " as " + charset + " encoded file");
    }

    return str;
  }
예제 #5
0
  /**
   * Get binary data of a source file.
   *
   * @param path The canonical path of source file.
   * @return Source file data.
   */
  public byte[] read(String path) {
    if (!binaryCache.containsKey(path)) {
      try {
        BufferedInputStream bf = new BufferedInputStream(new FileInputStream(new File(path)));
        try {
          byte[] data = new byte[bf.available()];
          bf.read(data);
          detectBOM(data, path);
          binaryCache.put(path, data);
        } finally {
          bf.close();
        }
      } catch (IOException e) {
        App.exit(e);
      }
    }

    return binaryCache.get(path);
  }
예제 #6
0
  /**
   * Locate root path.
   *
   * @param root The user-specified root path.
   */
  private void locateRoot(String root) {
    // Locate default root folder.
    if (root == null) {
      File pwd = new File(".").getAbsoluteFile();
      File f = pwd;
      String[] l = null;

      // Detect intl-style/xxx/htdocs by finding "js" and "css" in sub folders.
      do {
        f = f.getParentFile();
        if (f == null) {
          break;
        }

        l =
            f.list(
                new FilenameFilter() {
                  private Pattern pattern = Pattern.compile("^(?:js|css)$");

                  public boolean accept(File dir, String name) {
                    return pattern.matcher(name).matches();
                  }
                });
      } while (l.length != 2);

      // If present, use intl-style/xxx/htdocs as root folder for Alibaba.
      if (f != null) {
        this.root = canonize(f);
        // Else use present working folder as root folder.
      } else {
        this.root = canonize(pwd);
      }
      // Use user-specified root folder.
    } else {
      File f = new File(root);
      if (f.exists()) {
        this.root = canonize(f);
      } else {
        App.exit("The user-specified root folder " + root + " does not exist.");
      }
    }
  }
예제 #7
0
  /**
   * Travel dependencies tree by DFS and Post-Order algorithm.
   *
   * @param tree The initial tree which contains root node only.
   * @param footprint The footprint of the traversal.
   * @param output Output queue of combined files.
   */
  private void travel(
      Stack<ArrayList<String>> tree, Stack<String> footprint, ArrayList<String> output) {
    for (String node : tree.peek()) {
      // Detect circular dependences by looking back footprint.
      if (footprint.contains(node)) {
        String msg = "Circular dependences was found\n";
        for (String path : footprint) {
          msg += "    " + path + " ->\n";
        }
        msg += "    " + node;
        App.exit(msg);
      }

      // Skip visited node.
      if (output.contains(node)) {
        continue;
      }

      // Move forward.
      footprint.push(node);

      // Add sub nodes.
      tree.push(getDependencies(node));

      // Travel sub nodes.
      travel(tree, footprint, output);

      // Clean visited nodes.
      tree.pop();

      // Move backward.
      footprint.pop();

      // Add first visited node to output queue.
      output.add(node);
    }
  }