feat: Sort tags

1 files changed, 51 insertions, 8 deletions

diff --git a/pkg/git/git.go b/pkg/git/git.go
index 7341c1b..a9c42ce 100644
--- a/pkg/git/git.go
+++ b/pkg/git/git.go
@@ -8,6 +8,7 @@ import (
 	"io"
 	"io/fs"
 	"path"
+	"sort"
 	"time"
 
 	"github.com/go-git/go-git/v5"
@@ -26,10 +27,12 @@ type (
 	GitRepository struct {
 		path       string
 		repository *git.Repository
-
-		ref plumbing.Hash
-		// this is setRef when ref is setRef
-		setRef bool
+		ref        plumbing.Hash
+		setRef     bool
+	}
+	TagReference struct {
+		ref *plumbing.Reference
+		tag *object.Tag
 	}
 	infoWrapper struct {
 		name    string
@@ -38,10 +41,9 @@ type (
 		modTime time.Time
 		isDir   bool
 	}
-
-	TagReference struct {
-		ref *plumbing.Reference
-		tag *object.Tag
+	tagList struct {
+		refs []*TagReference
+		r    *git.Repository
 	}
 )
 
@@ -152,6 +154,10 @@ func (g *GitRepository) Tags() ([]*TagReference, error) {
 		return nil, err
 	}
 
+	// tagList modify the underlying tag list.
+	tagList := &tagList{r: g.repository, refs: tags}
+	sort.Sort(tagList)
+
 	return tags, nil
 }
 
@@ -395,3 +401,40 @@ func (t *TagReference) Message() string {
 	return ""
 
 }
+
+func (self *tagList) Len() int {
+	return len(self.refs)
+}
+
+func (self *tagList) Swap(i, j int) {
+	self.refs[i], self.refs[j] = self.refs[j], self.refs[i]
+}
+
+func (self *tagList) Less(i, j int) bool {
+	var dateI time.Time
+	var dateJ time.Time
+
+	if self.refs[i].tag != nil {
+		dateI = self.refs[i].tag.Tagger.When
+	} else {
+		c, err := self.r.CommitObject(self.refs[i].ref.Hash())
+		if err != nil {
+			dateI = time.Now()
+		} else {
+			dateI = c.Committer.When
+		}
+	}
+
+	if self.refs[j].tag != nil {
+		dateJ = self.refs[j].tag.Tagger.When
+	} else {
+		c, err := self.r.CommitObject(self.refs[j].ref.Hash())
+		if err != nil {
+			dateJ = time.Now()
+		} else {
+			dateJ = c.Committer.When
+		}
+	}
+
+	return dateI.After(dateJ)
+}