Method contentsToClassPath

app/src/processing/app/Util.java:539–573

Given a folder, return a list of absolute paths to all jar or zip files inside that folder, separated by pathSeparatorChar. This will prepend a colon (or whatever the path separator is) so that it can be directly appended to another path string. As of 0136, this will no longer add the root f

(File folder)

   * files in the folder or within a subfolder.
   */
  static public String contentsToClassPath(File folder) {
    if (folder == null) return "";

    StringBuilder sb = new StringBuilder();
    String sep = System.getProperty("path.separator");

    try {
      String path = folder.getCanonicalPath();

      // When getting the name of this folder, make sure it has a slash
      // after it, so that the names of sub-items can be added.
      if (!path.endsWith(File.separator)) {
        path += File.separator;
      }

      String[] list = folder.list();
      if (list != null) {
        for (String item : list) {
          // Skip . and ._ files. Prior to 0125p3, .jar files that had
          // OS X AppleDouble files associated would cause trouble.
          if (!item.startsWith(".")) {
            if (item.toLowerCase().endsWith(".jar") ||
              item.toLowerCase().endsWith(".zip")) {
              sb.append(sep);
              sb.append(path);
              sb.append(item);
            }
          }
        }
      }
    } catch (IOException e) {
      e.printStackTrace();  // this would be odd
    }
    return sb.toString();
  }


  /**