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Datei: Install.java Sprache: JAVA

Original von: Isabelle^©

/*
* Install.java - Main class of the installer
*
* Originally written by Slava Pestov for the jEdit installer project. This work
* has been placed into the public domain. You may use this work in any way and
* for any purpose you wish.
*
* THIS SOFTWARE IS PROVIDED AS-IS WITHOUT WARRANTY OF ANY KIND, NOT EVEN THE
* IMPLIED WARRANTY OF MERCHANTABILITY. THE AUTHOR OF THIS SOFTWARE, ASSUMES
* _NO_ RESPONSIBILITY FOR ANY CONSEQUENCE RESULTING FROM THE USE, MODIFICATION,
* OR REDISTRIBUTION OF THIS SOFTWARE.
*/

package installer;

import javax.swing.plaf.metal.*;
import javax.swing.*;
import java.io.*;
import java.util.Properties;
import java.security.*;
import java.net.URL;

import static java.lang.Integer.parseInt;

public class Install
{
/**
* detects wether the installer is running from a path
* containing exclamation marks.
* This has been reported as a cause of failure on Linux and MS Windows :
* see bug #2065330 - Installer doesn't run on dir having ! as last char in name.
*/
private static boolean isRunningFromExclam()
{
  Class me = Install.class;
  ProtectionDomain domaine = me.getProtectionDomain();
  CodeSource source = domaine.getCodeSource();
  URL mySource = source.getLocation();
  // In fact the check is more restrictive than required :
  // a problem occurs only when the ! is at the end of directory
  return mySource.toString().contains("!");
}

private static void errorAndExit(boolean isGUI, String message)
{
  if(isGUI)
  {
   JTextArea messageCnt = new JTextArea(message);
   JOptionPane.showMessageDialog(null,
    messageCnt,
    "jEdit installer error...", JOptionPane.ERROR_MESSAGE);
  }
  else
  {
   System.err.println(message);
  }
  System.exit(1);
}

public static void main(String[] args)
{
  boolean isGUI = args.length == 0;

  String javaVersion = System.getProperty("java.version");
  int javaMajorVersion = parseInt(javaVersion.split("\\.", 2)[0]);
  if(javaMajorVersion < 11)
  {
   errorAndExit(isGUI,
       "You are running Java version "
     + javaVersion + " from "+System.getProperty("java.vendor")+".\n"
     +"This installer requires Java 11 or later.");
  }

  if(isRunningFromExclam())
  {
   errorAndExit(isGUI,
       "You are running the installer from a directory containing exclamation marks."
     + "\nIt is a known cause of failure of the installer"
     + "\n(http://bugs.sun.com/bugdatabase/view_bug.do?bug_id=4523159 for the curious ones)."
     + "\nPlease move the installer somewhere else and run it again.");
  }

  if(isGUI)
   new SwingInstall();
  else if(args.length == 1 && args[0].equals("text"))
   new ConsoleInstall();
  else if(args.length >= 2 && args[0].equals("auto"))
   new NonInteractiveInstall(args);
  else
  {
   System.err.println("Usage:");
   System.err.println("java -jar ");
   System.err.println("java -jar text");
   System.err.println("java -jar auto"
    + " [unix-script=] [unix-man=]");
   System.err.println("text parameter starts installer in text-only mode.");
   System.err.println("auto parameter starts installer in non-interactive mode.");
  }
}

public Install()
{
  props = new Properties();
  try
  {
   InputStream in = getClass().getResourceAsStream("/installer/install.props");
   props.load(in);
   in.close();
  }
  catch(IOException io)
  {
   System.err.println("Error loading 'install.props':");
   io.printStackTrace();
  }

  buf = new byte[32768];
}

public String getProperty(String name)
{
  return props.getProperty(name);
}

public int getIntegerProperty(String name)
{
  try
  {
   return Integer.parseInt(props.getProperty(name));
  }
  catch(Exception e)
  {
   return -1;
  }
}

public void copy(InputStream in, String outfile, Progress progress)
  throws IOException
{
  File outFile = new File(outfile);

  OperatingSystem.getOperatingSystem().mkdirs(outFile.getParent());

  BufferedOutputStream out = new BufferedOutputStream(
   new FileOutputStream(outFile));

  int count;

  for(;;)
  {
   count = in.read(buf,0,Math.min(in.available(),buf.length));
   if(count == -1 || count == 0)
    break;

   out.write(buf,0,count);
   if(progress != null)
    progress.advance(count);
  }

  //in.close();
  out.close();
}

// private members
private Properties props;
private byte[] buf;
}

¤ Dauer der Verarbeitung: 0.1 Sekunden (vorverarbeitet) ¤

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