Bug 33897 [Import/Export] Export to .tar.gz or .tar.bz2
Right click a Java project. Choose "Export...". A window opens where you can choose between different export targets. There is no ".tar.gz" target or ".tar.bz2". I would like to have either one (or both). If I must choose one, I prefer ".tar.bz2", but I don't really have a strong opinion about it; ".tar.gz" would be fine as well. The reason I somewhat prefer bzip2 is that bzip2 makes files noticably smaller than gzip, and my impression is that gzip is slowly being outcompeted. A Linux-GTK implementation would be good enough for me, but it is possible that "Unix All" would be a better platform as other Unix users could probably be interested in this as well.
bundles/org.eclipse.ui.ide/src/org/eclipse/ui/internal/wizards/datatransfer/ZipFileExporter.java
fileContents = buffer.toString().getBytes();
        try {
            byte[] hashValue = MessageDigest
                    .getInstance("SHA").digest(fileContents);
            manifestEntry.append(Base64Encoder.encode(hashValue));
            manifestEntry.append(newline);
            manifestEntry.append(md5Label);
            hashValue = MessageDigest.getInstance("MD5").digest(fileContents);
            manifestEntry.append(Base64Encoder.encode(hashValue));
            manifestEntry.append(newline + newline);
        } catch (NoSuchAlgorithmException e) {
            
            return;
        }
        manifestContents.append(manifestEntry.toString());
    }
    /**
     *	Do all required cleanup now that we're finished with the
     *	currently-open .zip
     *
     *	@exception java.io.IOException
     */
    public void finished() throws IOException {
        if (generateManifestFile)
            writeManifestFile();
        outputStream.close();
    }
    /**
     *	Create a new ZipEntry with the passed pathname and contents, and write it
     *	to the current archive