Fix some trivial problems (#34237)

1. Using existing "content" variable in `swift.go`
2. Do not report 500 server error in `GetPullDiffStats` middleware,
otherwise a PR missing ref won't be able to view.
3. Fix the abused "label button" when listing commits, there was too
much padding space, see the screenshot below.

routers/api/packages/swift/swift.go

@@ -304,7 +304,7 @@ func formFileOptionalReadCloser(ctx *context.Context, formKey string) (io.ReadCl
 	if content == "" {
 		return nil, nil
 	}
-	return io.NopCloser(strings.NewReader(ctx.Req.FormValue(formKey))), nil
+	return io.NopCloser(strings.NewReader(content)), nil
 }
 
 // UploadPackageFile refers to https://github.com/swiftlang/swift-package-manager/blob/main/Documentation/PackageRegistry/Registry.md#endpoint-6

routers/web/repo/pull.go

@@ -181,6 +181,7 @@ func setMergeTarget(ctx *context.Context, pull *issues_model.PullRequest) {
 
 // GetPullDiffStats get Pull Requests diff stats
 func GetPullDiffStats(ctx *context.Context) {
+	// FIXME: this getPullInfo seems to be a duplicate call with other route handlers
 	issue, ok := getPullInfo(ctx)
 	if !ok {
 		return
@@ -188,21 +189,19 @@ func GetPullDiffStats(ctx *context.Context) {
 	pull := issue.PullRequest
 
 	mergeBaseCommitID := GetMergedBaseCommitID(ctx, issue)
-
 	if mergeBaseCommitID == "" {
-		ctx.NotFound(nil)
-		return
+		return // no merge base, do nothing, do not stop the route handler, see below
 	}
 
+	// do not report 500 server error to end users if error occurs, otherwise a PR missing ref won't be able to view.
 	headCommitID, err := ctx.Repo.GitRepo.GetRefCommitID(pull.GetGitRefName())
 	if err != nil {
-		ctx.ServerError("GetRefCommitID", err)
+		log.Error("Failed to GetRefCommitID: %v, repo: %v", err, ctx.Repo.Repository.FullName())
 		return
 	}
-
 	diffShortStat, err := gitdiff.GetDiffShortStat(ctx.Repo.GitRepo, mergeBaseCommitID, headCommitID)
 	if err != nil {
-		ctx.ServerError("GetDiffShortStat", err)
+		log.Error("Failed to GetDiffShortStat: %v, repo: %v", err, ctx.Repo.Repository.FullName())
 		return
 	}
 

templates/repo/tag/name.tmpl

@@ -1,3 +1,3 @@
-<a class="ui label basic tiny button{{if .IsRelease}} primary{{end}}" href="{{.RepoLink}}/src/tag/{{.TagName|PathEscape}}">
+<a class="ui basic label tw-p-1 {{if .IsRelease}}primary{{end}}" href="{{.RepoLink}}/src/tag/{{.TagName|PathEscape}}">
 {{svg "octicon-tag"}} {{.TagName}}
 </a>