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/WizardZipFileExportPage1.java
if (targetFile.exists()) {
            if (!overwriteExistingFileCheckbox.getSelection()
                    && targetFile.canWrite()) {
                if (!queryYesNoQuestion(DataTransferMessages
                        .getString("ZipExport.alreadyExists"))) 
                    return false;
            }
            if (!targetFile.canWrite()) {
                displayErrorDialog(DataTransferMessages
                        .getString("ZipExport.alreadyExistsError")); 
                giveFocusToDestination();
                return false;
            }
        }
        return true;
    }
    /**
     * Ensures that the target output file and its containing directory are
     * both valid and able to be used.  Answer a boolean indicating these.
     *
     * @return boolean
     */
    protected boolean ensureTargetIsValid() {
        String targetPath = getDestinationValue();
        if (!ensureTargetDirectoryIsValid(targetPath))
            return false;
        if (!ensureTargetFileIsValid(new File(targetPath)))
            return false;
        return true;
    }