knotserver/internal: fix repo compare URL

Before this we incorrectly assumed that the git user Did was the same as
the repo Did, this is not the case. We now take the repo Did as an
argument to the replyCompare function

Signed-off-by: Samuel Shuert <[e-mail]>

knotserver/internal.go

···
 		}
 
 		if (line.NewSha.String() != line.OldSha.String()) && line.OldSha.IsZero() {
-			msg, err := h.replyCompare(line, gitUserDid, gitRelativeDir, repoName, r.Context())
+			msg, err := h.replyCompare(line, repoDid, gitRelativeDir, repoName, r.Context())
 			if err != nil {
 				l.Error("failed to reply with compare link", "err", err, "line", line, "did", gitUserDid, "repo", gitRelativeDir)
 				// non-fatal
···
 	writeJSON(w, resp)
 }
 
-func (h *InternalHandle) replyCompare(line git.PostReceiveLine, gitUserDid string, gitRelativeDir string, repoName string, ctx context.Context) ([]string, error) {
+func (h *InternalHandle) replyCompare(line git.PostReceiveLine, repoOwner string, gitRelativeDir string, repoName string, ctx context.Context) ([]string, error) {
 	l := h.l.With("handler", "replyCompare")
-	userIdent, err := idresolver.DefaultResolver().ResolveIdent(ctx, gitUserDid)
-	user := gitUserDid
+	userIdent, err := idresolver.DefaultResolver().ResolveIdent(ctx, repoOwner)
+	user := repoOwner
 	if err != nil {
 		l.Error("Failed to fetch user identity", "err", err)
 		// non-fatal