nextVersion function

Version nextVersion(Version currentVersion, List<Commit> commits, { bool incrementBuild = false, bool afterV1 = false, String? pre, })

Bump up a currentVersion based on a list of commits

If commits has any breaking changes, it will be bumped to the next major version. If not and the commits have any new features, it will be bumped to the next minor version. If not and the commits have patch-level changes, it will be bumped to the next patch version.

NOTE: I would have loved to use Version.nextMajor methods and the like. However, they discarded the build numbers and release parts so I had to create my own.

TODO: Perhaps asks the kind people at pub_semver to have this feature.

Implementation

Version nextVersion(
  Version currentVersion,
  List<Commit> commits, {
  bool incrementBuild = false,
  bool afterV1 = false,
  String? pre,
}) {
  bool isMajor = false;
  bool isMinor = false;
  bool isPatch = false;

  for (final commit in commits) {
    if (commit.breaking) {
      isMajor = true;
    } else if (commit.type == 'feat') {
      isMinor = true;
    } else if (commit.type == 'fix') {
      isPatch = true;
    }
  }

  late Version prepVersion;
  final isPre1 = currentVersion.major < 1;
  final basis =
      Version(currentVersion.major, currentVersion.minor, currentVersion.patch);

  if (isPre1 && afterV1 && (isMajor || isMinor || isPatch)) {
    prepVersion = currentVersion.nextMajor;
  } else {
    if (isMajor) {
      prepVersion = isPre1 ? basis.nextMinor : basis.nextMajor;
    } else if (isMinor) {
      prepVersion = isPre1 ? basis.nextPatch : basis.nextMinor;
    } else if (isPatch) {
      prepVersion = basis.nextPatch;
    } else {
      return currentVersion;
    }
  }

  return Version(
    prepVersion.major,
    prepVersion.minor,
    prepVersion.patch,
    build: currentVersion.build.isEmpty
        ? null
        : _addBuild(currentVersion, incrementBuild: incrementBuild),
    pre: pre is String
        ? pre
        : currentVersion.preRelease.isEmpty
            ? null
            : currentVersion.preRelease.join('.'),
  );
}