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
createDirectoryStructureCheckbox.setSelection(true);
        compressContentsCheckbox.setSelection(true);
    }
    /**
     * Returns a boolean indicating whether the directory portion of the
     * passed pathname is valid and available for use.
     *
     * @return boolean
     */
    protected boolean ensureTargetDirectoryIsValid(String fullPathname) {
        int separatorIndex = fullPathname.lastIndexOf(File.separator);
        if (separatorIndex == -1) 
            return true;
        return ensureTargetIsValid(new File(fullPathname.substring(0,
                separatorIndex)));
    }
    /**
     * Returns a boolean indicating whether the passed File handle is
     * is valid and available for use.
     *
     * @return boolean
     */
    protected boolean ensureTargetFileIsValid(File targetFile) {
        if (targetFile.exists() && targetFile.isDirectory()) {
            displayErrorDialog(DataTransferMessages
                    .getString("ZipExport.mustBeFile")); 
            giveFocusToDestination();
            return false;
        }