Fix bug when comparing there is diff but no commit

routers/web/repo/compare.go

@@ -495,6 +495,7 @@ func PrepareCompareDiff(
 		ctx.ServerError("GetDiffShortStat", err)
 		return false
 	}
+	ctx.Data["IsNothingToCompare"] = diffShortStat.NumFiles == 0
 	ctx.Data["DiffShortStat"] = diffShortStat
 	ctx.Data["Diff"] = diff
 	ctx.Data["DiffBlobExcerptData"] = &gitdiff.DiffBlobExcerptData{
@@ -532,24 +533,26 @@ func PrepareCompareDiff(
 		return false
 	}
 
-	commits, err := processGitCommits(ctx, ci.Commits)
-	if err != nil {
-		ctx.ServerError("processGitCommits", err)
-		return false
-	}
-	ctx.Data["Commits"] = commits
-	ctx.Data["CommitCount"] = len(commits)
-
 	title := ci.HeadRef.ShortName()
-	if len(commits) == 1 {
-		c := commits[0]
-		title = strings.TrimSpace(c.UserCommit.Summary())
 
-		body := strings.Split(strings.TrimSpace(c.UserCommit.Message()), "\n")
+	if len(ci.Commits) > 0 {
-		if len(body) > 1 {
+		commits, err := processGitCommits(ctx, ci.Commits)
-			ctx.Data["content"] = strings.Join(body[1:], "\n")
+		if err != nil {
+			ctx.ServerError("processGitCommits", err)
+			return false
+		}
+		ctx.Data["Commits"] = commits
+		if len(commits) == 1 {
+			c := commits[0]
+			title = strings.TrimSpace(c.UserCommit.Summary())
+
+			body := strings.Split(strings.TrimSpace(c.UserCommit.Message()), "\n")
+			if len(body) > 1 {
+				ctx.Data["content"] = strings.Join(body[1:], "\n")
+			}
 		}
 	}
+	ctx.Data["CommitCount"] = len(ci.Commits)
 
 	if len(title) > 255 {
 		var trailer string

templates/repo/diff/compare.tmpl

@@ -173,7 +173,6 @@
 			</div>
 		</div>
 
-		{{$showDiffBox := and .CommitCount (not .IsNothingToCompare)}}
 		{{if and .IsSigned .PageIsComparePull}}
 			{{$allowCreatePR := and ($.CompareInfo.BaseRef.IsBranch) ($.CompareInfo.HeadRef.IsBranch) (not $.CompareInfo.DirectComparison) (or $.AllowEmptyPr (not .IsNothingToCompare))}}
 			{{if .IsNothingToCompare}}
@@ -216,15 +215,17 @@
 				</div>
 			{{end}}
 		{{else}}{{/* not singed-in or not for pull-request */}}
-			{{if not .CommitCount}}
+			{{if .IsNothingToCompare}}
 				<div class="ui segment">{{ctx.Locale.Tr "repo.commits.nothing_to_compare"}}</div>
 			{{end}}
 		{{end}}
 	</div>
 
-	{{if $showDiffBox}}
+	{{if not .IsNothingToCompare}}
 		<div class="ui container fluid padded tw-my-4">
-			{{template "repo/commits_table" .}}
+			{{if .CommitCount}}
+				{{template "repo/commits_table" .}}
+			{{end}}
 			{{template "repo/diff/box" .}}
 		</div>
 	{{end}}