feat: Add syntax highlight to diff

1 files changed, 20 insertions, 1 deletions

diff --git a/pkg/handler/git/handler.go b/pkg/handler/git/handler.go
index 9c7ba5b..80f7de6 100644
--- a/pkg/handler/git/handler.go
+++ b/pkg/handler/git/handler.go
@@ -361,12 +361,31 @@ func (g *GitHandler) Commit(w http.ResponseWriter, r *http.Request) error {
 		return err
 	}
 
+	lexer := lexers.Get("diff")
+	style := styles.Get(g.config.GetSyntaxHighlight())
+
+	formatter := html.New(
+		html.WithLineNumbers(true),
+		html.WithLinkableLineNumbers(true, "L"),
+	)
+
+	iterator, err := lexer.Tokenise(nil, diff)
+	if err != nil {
+		return err
+	}
+
+	var code bytes.Buffer
+	err = formatter.Format(&code, style, iterator)
+	if err != nil {
+		return err
+	}
+
 	gitList := &templates.GitItemPage{
 		Name: name,
 		Ref:  ref,
 		GitItemBase: &templates.GitItemCommitPage{
 			Commit: commit,
-			Diff:   diff,
+			Diff:   code.Bytes(),
 		},
 	}
 	templates.WritePageTemplate(w, gitList, r.Context())