Method findGnuplotHelperScript

src/tsd/GraphHandler.java:1015–1049

Iterate through the class path and look for the Gnuplot helper script. @return The path to the wrapper script.

()

   * @return The path to the wrapper script.
   */
  private static String findGnuplotHelperScript() {
    if(!GnuplotInstaller.FOUND_GP) {
      LOG.warn("Skipping Gnuplot Shell Script Install since Gnuplot executable was not found");
      return null;
    }
    if(!GnuplotInstaller.GP_FILE.exists()) {
      GnuplotInstaller.installMyGnuPlot();
    }
    if(GnuplotInstaller.GP_FILE.exists() && GnuplotInstaller.GP_FILE.canExecute()) {
      LOG.info("Auto Installed Gnuplot Invoker at [{}]", GnuplotInstaller.GP_FILE.getAbsolutePath());
      return GnuplotInstaller.GP_FILE.getAbsolutePath();
    }
    
    final URL url = GraphHandler.class.getClassLoader().getResource(WRAPPER);
    if (url == null) {
      throw new RuntimeException("Couldn't find " + WRAPPER + " on the"
        + " CLASSPATH: " + System.getProperty("java.class.path"));
    }
    final String path = url.getFile();
    LOG.debug("Using Gnuplot wrapper at {}", path);
    final File file = new File(path);
    final String error;
    if (!file.exists()) {
      error = "non-existent";
    } else if (!file.canExecute()) {
      error = "non-executable";
    } else if (!file.canRead()) {
      error = "unreadable";
    } else {
      return path;
    }
    throw new RuntimeException("The " + WRAPPER + " found on the"
      + " CLASSPATH (" + path + ") is a " + error + " file...  WTF?"
      + "  CLASSPATH=" + System.getProperty("java.class.path"));
  }


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