feat: add support for non-colocated jj repos

README.md

@@ -50,6 +50,12 @@ version based on this table:
 > alias gtn='git tag $(svu next)'
 > ```
 
+> [!NOTE]
+> [Jujutsu (jj)](https://github.com/jj-vcs/jj) repositories that are not
+> colocated with git are supported as well: svu reads the tags and the
+> history of the working-copy commit (`@`) with the `jj` CLI, skipping commits
+> without a description. Colocated repositories are read through git.
+
 ## configuration
 
 Every flag option can also be set in a `.svu.yml` in the current

internal/svu/svu.go

@@ -11,7 +11,7 @@ import (
 	"strings"
 
 	"github.com/Masterminds/semver/v3"
-	"github.com/caarlos0/svu/v3/internal/git"
+	"github.com/caarlos0/svu/v3/internal/vcs"
 )
 
 type Action uint
@@ -60,7 +60,8 @@ type VersionInfo struct {
 }
 
 func Version(opts Options) (string, error) {
-	tag, err := git.DescribeTag(opts.Ctx, opts.TagMode, opts.Pattern)
+	repo := vcs.Detect(".")
+	tag, err := repo.DescribeTag(opts.Ctx, opts.TagMode, opts.Pattern)
 	if err != nil {
 		return "", fmt.Errorf("failed to get current tag for repo: %w", err)
 	}
@@ -70,7 +71,7 @@ func Version(opts Options) (string, error) {
 		return "", fmt.Errorf("could not get current version from tag: '%s': %w", tag, err)
 	}
 
-	result, err := nextVersion(current, tag, opts)
+	result, err := nextVersion(repo, current, tag, opts)
 	if err != nil {
 		return "", fmt.Errorf("could not get next tag: '%s': %w", tag, err)
 	}
@@ -83,6 +84,7 @@ func Version(opts Options) (string, error) {
 }
 
 func nextVersion(
+	repo vcs.Repo,
 	current *semver.Version,
 	tag string,
 	opts Options,
@@ -95,7 +97,7 @@ func nextVersion(
 	var err error
 	switch opts.Action {
 	case Next, PreRelease:
-		result, err = findNextWithGitLog(current, tag, opts)
+		result, err = findNextWithLog(repo, current, tag, opts)
 	case Major:
 		result = current.IncMajor()
 	case Minor:
@@ -199,33 +201,34 @@ func getCurrentVersion(tag, prefix string) (*semver.Version, error) {
 	return current, err
 }
 
-func findNextWithGitLog(
+func findNextWithLog(
+	repo vcs.Repo,
 	current *semver.Version,
 	tag string,
 	opts Options,
 ) (semver.Version, error) {
-	log, err := git.Changelog(opts.Ctx, tag, opts.Directories)
+	log, err := repo.Changelog(opts.Ctx, tag, opts.Directories)
 	if err != nil {
 		return semver.Version{}, fmt.Errorf("failed to get changelog: %w", err)
 	}
 
 	return findNext(current, log, opts), nil
 }
 
-func isBreaking(commit git.Commit) bool {
+func isBreaking(commit vcs.Commit) bool {
 	return breakingBody.MatchString(commit.Body) || breaking.MatchString(commit.Title)
 }
 
-func isFeature(commit git.Commit) bool {
+func isFeature(commit vcs.Commit) bool {
 	return feature.MatchString(commit.Title)
 }
 
-func isPatch(commit git.Commit) bool {
+func isPatch(commit vcs.Commit) bool {
 	return patch.MatchString(commit.Title)
 }
 
-func findNext(current *semver.Version, changes []git.Commit, opts Options) semver.Version {
-	var major, minor, patch *git.Commit
+func findNext(current *semver.Version, changes []vcs.Commit, opts Options) semver.Version {
+	var major, minor, patch *vcs.Commit
 	for _, commit := range changes {
 		if isBreaking(commit) {
 			major = &commit