Fix tag route and empty repo (#33253)

Author: wxiaoguang

Diff for: routers/web/repo/view_home.go

@@ -249,7 +249,7 @@ func handleRepoEmptyOrBroken(ctx *context.Context) {
 		} else if reallyEmpty {
 			showEmpty = true // the repo is really empty
 			updateContextRepoEmptyAndStatus(ctx, true, repo_model.RepositoryReady)
-		} else if ctx.Repo.Commit == nil {
+		} else if branches, _, _ := ctx.Repo.GitRepo.GetBranches(0, 1); len(branches) == 0 {
 			showEmpty = true // it is not really empty, but there is no branch
 			// at the moment, other repo units like "actions" are not able to handle such case,
 			// so we just mark the repo as empty to prevent from displaying these units.

Diff for: routers/web/web.go

@@ -1335,8 +1335,7 @@ func registerRoutes(m *web.Router) {
 			m.Get(".atom", feedEnabled, repo.TagsListFeedAtom)
 		}, ctxDataSet("EnableFeed", setting.Other.EnableFeed),
 			repo.MustBeNotEmpty, context.RepoRefByType(context.RepoRefTag, context.RepoRefByTypeOptions{IgnoreNotExistErr: true}))
-		m.Post("/tags/delete", repo.DeleteTag, reqSignIn,
-			repo.MustBeNotEmpty, context.RepoMustNotBeArchived(), reqRepoCodeWriter, context.RepoRef())
+		m.Post("/tags/delete", reqSignIn, repo.MustBeNotEmpty, context.RepoMustNotBeArchived(), reqRepoCodeWriter, repo.DeleteTag)
 	}, optSignIn, context.RepoAssignment, reqRepoCodeReader)
 	// end "/{username}/{reponame}": repo tags
 

Diff for: tests/integration/empty_repo_test.go

@@ -14,6 +14,7 @@ import (
 	"testing"
 
 	auth_model "code.gitea.io/gitea/models/auth"
+	"code.gitea.io/gitea/models/db"
 	repo_model "code.gitea.io/gitea/models/repo"
 	"code.gitea.io/gitea/models/unittest"
 	user_model "code.gitea.io/gitea/models/user"
@@ -24,6 +25,7 @@ import (
 	"code.gitea.io/gitea/tests"
 
 	"github.com/stretchr/testify/assert"
+	"github.com/stretchr/testify/require"
 )
 
 func testAPINewFile(t *testing.T, session *TestSession, user, repo, branch, treePath, content string) *httptest.ResponseRecorder {
@@ -60,7 +62,9 @@ func TestEmptyRepoAddFile(t *testing.T) {
 	session := loginUser(t, "user30")
 	req := NewRequest(t, "GET", "/user30/empty")
 	resp := session.MakeRequest(t, req, http.StatusOK)
-	assert.Contains(t, resp.Body.String(), "empty-repo-guide")
+	bodyString := resp.Body.String()
+	assert.Contains(t, bodyString, "empty-repo-guide")
+	assert.True(t, test.IsNormalPageCompleted(bodyString))
 
 	req = NewRequest(t, "GET", "/user30/empty/_new/"+setting.Repository.DefaultBranch)
 	resp = session.MakeRequest(t, req, http.StatusOK)
@@ -80,6 +84,21 @@ func TestEmptyRepoAddFile(t *testing.T) {
 	req = NewRequest(t, "GET", redirect)
 	resp = session.MakeRequest(t, req, http.StatusOK)
 	assert.Contains(t, resp.Body.String(), "newly-added-test-file")
+
+	// the repo is not empty anymore
+	req = NewRequest(t, "GET", "/user30/empty")
+	resp = session.MakeRequest(t, req, http.StatusOK)
+	assert.Contains(t, resp.Body.String(), "test-file.md")
+
+	// if the repo is in incorrect state, it should be able to self-heal (recover to correct state)
+	user30EmptyRepo := unittest.AssertExistsAndLoadBean(t, &repo_model.Repository{OwnerID: 30, Name: "empty"})
+	user30EmptyRepo.IsEmpty = true
+	user30EmptyRepo.DefaultBranch = "no-such"
+	_, err := db.GetEngine(db.DefaultContext).ID(user30EmptyRepo.ID).Update(user30EmptyRepo)
+	require.NoError(t, err)
+	req = NewRequest(t, "GET", "/user30/empty")
+	resp = session.MakeRequest(t, req, http.StatusOK)
+	assert.Contains(t, resp.Body.String(), "test-file.md")
 }
 
 func TestEmptyRepoUploadFile(t *testing.T) {