Gradle script - Semantic version bumping

build.gradle

class Version {
    Integer major;
    Integer minor;
    Integer patch;

    Version(major, minor, patch) {
        this.major = major
        this.minor = minor
        this.patch = patch
    }

    public static Version valueOf(String version) {
        def matcher = version =~ /(?<major>\d{1,2})\.(?<minor>\d{1,2})\.(?<patch>\d{1,2})/
        matcher.matches()
        def major = matcher.group('major').toInteger()
        def minor = matcher.group('minor').toInteger()
        def patch = matcher.group('patch').toInteger()
        return new Version(major, minor, patch)
    }

    public void bumpMinor() {
        this.minor++
    }

    @Override
    public String toString() {
        return "${major}.${minor}.$patch"
    }
}

task bumpMinor<<{
    def projectVersion = Version.valueOf(version)
    projectVersion.bumpMinor()
    String versionToReplace=buildFile.getText()
            .replaceFirst("version='$version'","version='"+projectVersion.toString()+"'")
    buildFile.setText(versionToReplace)
}

task bumpPatch<<{
    def projectVersion = Version.valueOf(version)
    projectVersion.bumpMinor()
    String versionToReplace=buildFile.getText()
            .replaceFirst("version='$version'","version='"+projectVersion.toString()+"'")
    buildFile.setText(versionToReplace)
}

task bumpMajor<<{
    def projectVersion = Version.valueOf(version)
    projectVersion.bumpMinor()
    String versionToReplace=buildFile.getText()
            .replaceFirst("version='$version'","version='"+projectVersion.toString()+"'")
    buildFile.setText(versionToReplace)
}