}

    public QualifiedVersion withoutQualifier() {
        return new QualifiedVersion(major, minor, revision, null);
    }

    private static final Comparator<QualifiedVersion> COMPARATOR = Comparator.comparing((QualifiedVersion v) -> v.major)
        .thenComparing(v -> v.minor)
        .thenComparing(v -> v.revision)

        return TemplateUtils.render(template, bindings);
    }

    private static Map<QualifiedVersion, Map<String, Map<String, List<ChangelogEntry>>>> buildChangelogBreakdown(
        Map<QualifiedVersion, Set<ChangelogEntry>> changelogsByVersion
    ) {
        Map<QualifiedVersion, Map<String, Map<String, List<ChangelogEntry>>>> changelogsByVersionByTypeByArea = new TreeMap<>(
            Comparator.reverseOrder()

    }

    /**
     * Fetch all tags matching the specified pattern, returning them as {@link QualifiedVersion} instances.
     * @param pattern the tag pattern to match
     * @return matching versions
     */
    public Stream<QualifiedVersion> listVersions(String pattern) {
        return runCommand("git", "tag", "-l", pattern).lines().map(QualifiedVersion::of);
    }

    /**

     * @return all versions in the series
     */
    @VisibleForTesting
    static Set<QualifiedVersion> getVersions(GitWrapper gitWrapper, String currentVersion) {
        QualifiedVersion v = QualifiedVersion.of(currentVersion);
        Set<QualifiedVersion> versions = gitWrapper.listVersions("v" + v.getMajor() + '.' + v.getMinor() + ".*").collect(toSet());
        versions.add(v);

    static void update(Set<QualifiedVersion> versions, File indexTemplate, File indexFile) throws IOException {
        try (FileWriter indexFileWriter = new FileWriter(indexFile)) {
            indexFileWriter.write(generateFile(versions, Files.readString(indexTemplate.toPath())));
        }
    }

    @VisibleForTesting
    static String generateFile(Set<QualifiedVersion> versionsSet, String template) throws IOException {

            QualifiedVersion.of(VersionProperties.getElasticsearch()),
            this.getChangelogs().getFiles(),
            this.dryRun,
            this.rootDir
        );
    }

    @VisibleForTesting
    static void findAndDeleteFiles(
        GitWrapper gitWrapper,
        DeleteHelper deleteHelper,
        QualifiedVersion version,
        Set<File> allFilesInCheckout,

        try (FileWriter output = new FileWriter(outputFile)) {
            output.write(
                generateFile(QualifiedVersion.of(VersionProperties.getElasticsearch()), Files.readString(templateFile.toPath()), entries)
            );
        }
    }

    @VisibleForTesting
    static String generateFile(QualifiedVersion version, String template, List<ChangelogEntry> entries) throws IOException {

        try (FileWriter output = new FileWriter(outputFile)) {
            output.write(
                generateFile(QualifiedVersion.of(VersionProperties.getElasticsearch()), Files.readString(templateFile.toPath()), entries)
            );
        }
    }

    @VisibleForTesting
    static String generateFile(QualifiedVersion version, String template, List<ChangelogEntry> entries) throws IOException {