Merge pull request '[v7.0/forgejo] Do not update PRs based on events that happened before they existed' (#3164) from earl-warren/forgejo:wip-v7.0-superfluous into v7.0/forgejo

Reviewed-on: https://codeberg.org/forgejo/forgejo/pulls/3164
Reviewed-by: oliverpool <oliverpool@noreply.codeberg.org>

models/fixtures/TestGetUnmergedPullRequestsByHeadInfoMax/issue.yml

@@ -0,0 +1,12 @@
+-
+  id: 1001
+  repo_id: 1
+  index: 1001
+  poster_id: 1
+  name: issue1
+  content: content for the first issue
+  is_pull: true
+  created: 111111111
+  created_unix: 946684800
+  updated_unix: 978307200
+  is_closed: false

models/fixtures/TestGetUnmergedPullRequestsByHeadInfoMax/pull_request.yml

@@ -0,0 +1,13 @@
+-
+  id: 1001
+  type: 0 # pull request
+  status: 2 # mergable
+  issue_id: 1001
+  index: 1001
+  head_repo_id: 1
+  base_repo_id: 1
+  head_branch: branchmax
+  base_branch: master
+  merge_base: 4a357436d925b5c974181ff12a994538ddc5a269
+  has_merged: false
+  flow: 0

models/forgejo_migrations/migrate.go

@@ -58,6 +58,9 @@ var migrations = []*Migration{
 	NewMigration("Add the `apply_to_admins` column to the `protected_branch` table", forgejo_v1_22.AddApplyToAdminsSetting),
 	// v9 -> v10
 	NewMigration("Add pronouns to user", forgejo_v1_22.AddPronounsToUser),
+	// v11 -> v12
+	// it is a v7.0 migration backport see https://codeberg.org/forgejo/forgejo/pulls/3165#issuecomment-1755941
+	NewMigration("Add the `created` column to the `issue` table", forgejo_v1_22.AddCreatedToIssue),
 }
 
 // GetCurrentDBVersion returns the current Forgejo database version.

models/forgejo_migrations/v1_22/v11.go

@@ -0,0 +1,19 @@
+// Copyright 2024 The Forgejo Authors. All rights reserved.
+// SPDX-License-Identifier: MIT
+
+package v1_22 //nolint
+
+import (
+	"code.gitea.io/gitea/modules/timeutil"
+
+	"xorm.io/xorm"
+)
+
+func AddCreatedToIssue(x *xorm.Engine) error {
+	type Issue struct {
+		ID      int64 `xorm:"pk autoincr"`
+		Created timeutil.TimeStampNano
+	}
+
+	return x.Sync(&Issue{})
+}

models/issues/issue.go

@@ -124,6 +124,8 @@ type Issue struct {
 
 	DeadlineUnix timeutil.TimeStamp `xorm:"INDEX"`
 
+	Created timeutil.TimeStampNano
+
 	CreatedUnix timeutil.TimeStamp `xorm:"INDEX created"`
 	UpdatedUnix timeutil.TimeStamp `xorm:"INDEX updated"`
 	ClosedUnix  timeutil.TimeStamp `xorm:"INDEX"`

models/issues/issue_index.go

@@ -9,6 +9,14 @@ import (
 	"code.gitea.io/gitea/models/db"
 )
 
+func GetMaxIssueIndexForRepo(ctx context.Context, repoID int64) (int64, error) {
+	var max int64
+	if _, err := db.GetEngine(ctx).Select("MAX(`index`)").Table("issue").Where("repo_id=?", repoID).Get(&max); err != nil {
+		return 0, err
+	}
+	return max, nil
+}
+
 // RecalculateIssueIndexForRepo create issue_index for repo if not exist and
 // update it based on highest index of existing issues assigned to a repo
 func RecalculateIssueIndexForRepo(ctx context.Context, repoID int64) error {
@@ -18,8 +26,8 @@ func RecalculateIssueIndexForRepo(ctx context.Context, repoID int64) error {
 	}
 	defer committer.Close()
 
-	var max int64
-	if _, err = db.GetEngine(ctx).Select(" MAX(`index`)").Table("issue").Where("repo_id=?", repoID).Get(&max); err != nil {
+	max, err := GetMaxIssueIndexForRepo(ctx, repoID)
+	if err != nil {
 		return err
 	}
 

models/issues/issue_index_test.go

@@ -0,0 +1,38 @@
+// Copyright 2024 The Forgejo Authors
+// SPDX-License-Identifier: MIT
+
+package issues_test
+
+import (
+	"testing"
+
+	"code.gitea.io/gitea/models/db"
+	issues_model "code.gitea.io/gitea/models/issues"
+	repo_model "code.gitea.io/gitea/models/repo"
+	"code.gitea.io/gitea/models/unittest"
+
+	"github.com/stretchr/testify/assert"
+)
+
+func TestGetMaxIssueIndexForRepo(t *testing.T) {
+	assert.NoError(t, unittest.PrepareTestDatabase())
+
+	repo := unittest.AssertExistsAndLoadBean(t, &repo_model.Repository{ID: 1})
+
+	maxPR, err := issues_model.GetMaxIssueIndexForRepo(db.DefaultContext, repo.ID)
+	assert.NoError(t, err)
+
+	issue := testCreateIssue(t, repo.ID, repo.OwnerID, "title1", "content1", false)
+	assert.Greater(t, issue.Index, maxPR)
+
+	maxPR, err = issues_model.GetMaxIssueIndexForRepo(db.DefaultContext, repo.ID)
+	assert.NoError(t, err)
+
+	pull := testCreateIssue(t, repo.ID, repo.OwnerID, "title2", "content2", true)
+	assert.Greater(t, pull.Index, maxPR)
+
+	maxPR, err = issues_model.GetMaxIssueIndexForRepo(db.DefaultContext, repo.ID)
+	assert.NoError(t, err)
+
+	assert.Equal(t, maxPR, pull.Index)
+}

models/issues/issue_update.go

@@ -325,6 +325,8 @@ func NewIssueWithIndex(ctx context.Context, doer *user_model.User, opts NewIssue
 		return fmt.Errorf("issue exist")
 	}
 
+	opts.Issue.Created = timeutil.TimeStampNanoNow()
+
 	if _, err := e.Insert(opts.Issue); err != nil {
 		return err
 	}

models/issues/pull_list.go

@@ -47,6 +47,14 @@ func listPullRequestStatement(ctx context.Context, baseRepoID int64, opts *PullR
 	return sess, nil
 }
 
+func GetUnmergedPullRequestsByHeadInfoMax(ctx context.Context, repoID, olderThan int64, branch string) ([]*PullRequest, error) {
+	prs := make([]*PullRequest, 0, 2)
+	sess := db.GetEngine(ctx).
+		Join("INNER", "issue", "issue.id = `pull_request`.issue_id").
+		Where("`pull_request`.head_repo_id = ? AND `pull_request`.head_branch = ? AND `pull_request`.has_merged = ? AND `issue`.is_closed = ? AND `pull_request`.flow = ? AND (`issue`.`created` IS NULL OR `issue`.`created` <= ?)", repoID, branch, false, false, PullRequestFlowGithub, olderThan)
+	return prs, sess.Find(&prs)
+}
+
 // GetUnmergedPullRequestsByHeadInfo returns all pull requests that are open and has not been merged
 func GetUnmergedPullRequestsByHeadInfo(ctx context.Context, repoID int64, branch string) ([]*PullRequest, error) {
 	prs := make([]*PullRequest, 0, 2)

models/issues/pull_test.go

@@ -4,7 +4,9 @@
 package issues_test
 
 import (
+	"fmt"
 	"testing"
+	"time"
 
 	"code.gitea.io/gitea/models/db"
 	issues_model "code.gitea.io/gitea/models/issues"
@@ -12,6 +14,7 @@ import (
 	"code.gitea.io/gitea/models/unittest"
 	user_model "code.gitea.io/gitea/models/user"
 	"code.gitea.io/gitea/modules/setting"
+	"code.gitea.io/gitea/tests"
 
 	"github.com/stretchr/testify/assert"
 )
@@ -156,6 +159,100 @@ func TestGetUnmergedPullRequestsByHeadInfo(t *testing.T) {
 	}
 }
 
+func TestGetUnmergedPullRequestsByHeadInfoMax(t *testing.T) {
+	defer tests.AddFixtures("models/fixtures/TestGetUnmergedPullRequestsByHeadInfoMax/")()
+	assert.NoError(t, unittest.PrepareTestDatabase())
+
+	repoID := int64(1)
+	olderThan := int64(0)
+
+	// for NULL created field the olderThan condition is ignored
+	prs, err := issues_model.GetUnmergedPullRequestsByHeadInfoMax(db.DefaultContext, repoID, olderThan, "branch2")
+	assert.NoError(t, err)
+	assert.Equal(t, int64(1), prs[0].HeadRepoID)
+
+	// test for when the created field is set
+	branch := "branchmax"
+	prs, err = issues_model.GetUnmergedPullRequestsByHeadInfoMax(db.DefaultContext, repoID, olderThan, branch)
+	assert.NoError(t, err)
+	assert.Len(t, prs, 0)
+	olderThan = time.Now().UnixNano()
+	assert.NoError(t, err)
+	prs, err = issues_model.GetUnmergedPullRequestsByHeadInfoMax(db.DefaultContext, repoID, olderThan, branch)
+	assert.NoError(t, err)
+	assert.Len(t, prs, 1)
+	for _, pr := range prs {
+		assert.Equal(t, int64(1), pr.HeadRepoID)
+		assert.Equal(t, branch, pr.HeadBranch)
+	}
+	pr := prs[0]
+
+	for _, testCase := range []struct {
+		table   string
+		field   string
+		id      int64
+		match   any
+		nomatch any
+	}{
+		{
+			table:   "issue",
+			field:   "is_closed",
+			id:      pr.IssueID,
+			match:   false,
+			nomatch: true,
+		},
+		{
+			table:   "pull_request",
+			field:   "flow",
+			id:      pr.ID,
+			match:   issues_model.PullRequestFlowGithub,
+			nomatch: issues_model.PullRequestFlowAGit,
+		},
+		{
+			table:   "pull_request",
+			field:   "head_repo_id",
+			id:      pr.ID,
+			match:   pr.HeadRepoID,
+			nomatch: 0,
+		},
+		{
+			table:   "pull_request",
+			field:   "head_branch",
+			id:      pr.ID,
+			match:   pr.HeadBranch,
+			nomatch: "something else",
+		},
+		{
+			table:   "pull_request",
+			field:   "has_merged",
+			id:      pr.ID,
+			match:   false,
+			nomatch: true,
+		},
+	} {
+		t.Run(testCase.field, func(t *testing.T) {
+			update := fmt.Sprintf("UPDATE `%s` SET `%s` = ? WHERE `id` = ?", testCase.table, testCase.field)
+
+			// expect no match
+			_, err = db.GetEngine(db.DefaultContext).Exec(update, testCase.nomatch, testCase.id)
+			assert.NoError(t, err)
+			prs, err = issues_model.GetUnmergedPullRequestsByHeadInfoMax(db.DefaultContext, repoID, olderThan, branch)
+			assert.NoError(t, err)
+			assert.Len(t, prs, 0)
+
+			// expect one match
+			_, err = db.GetEngine(db.DefaultContext).Exec(update, testCase.match, testCase.id)
+			assert.NoError(t, err)
+			prs, err = issues_model.GetUnmergedPullRequestsByHeadInfoMax(db.DefaultContext, repoID, olderThan, branch)
+			assert.NoError(t, err)
+			assert.Len(t, prs, 1)
+
+			// identical to the known PR
+			assert.Equal(t, pr.ID, prs[0].ID)
+		})
+	}
+}
+
 func TestGetUnmergedPullRequestsByBaseInfo(t *testing.T) {
 	assert.NoError(t, unittest.PrepareTestDatabase())
 	prs, err := issues_model.GetUnmergedPullRequestsByBaseInfo(db.DefaultContext, 1, "master")

modules/repository/push.go

@@ -16,6 +16,7 @@ type PushUpdateOptions struct {
 	RefFullName  git.RefName // branch, tag or other name to push
 	OldCommitID  string
 	NewCommitID  string
+	TimeNano     int64
 }
 
 // IsNewRef return true if it's a first-time push to a branch, tag or etc.

routers/private/hook_post_receive.go

@@ -7,6 +7,7 @@ import (
 	"fmt"
 	"net/http"
 	"strconv"
+	"time"
 
 	git_model "code.gitea.io/gitea/models/git"
 	issues_model "code.gitea.io/gitea/models/issues"
@@ -71,6 +72,7 @@ func HookPostReceive(ctx *gitea_context.PrivateContext) {
 				PusherName:   opts.UserName,
 				RepoUserName: ownerName,
 				RepoName:     repoName,
+				TimeNano:     time.Now().UnixNano(),
 			}
 			updates = append(updates, option)
 			if repo.IsEmpty && (refFullName.BranchName() == "master" || refFullName.BranchName() == "main") {

services/pull/merge.go

@@ -187,7 +187,7 @@ func Merge(ctx context.Context, pr *issues_model.PullRequest, doer *user_model.U
 	}
 
 	defer func() {
-		go AddTestPullRequestTask(doer, pr.BaseRepo.ID, pr.BaseBranch, false, "", "")
+		AddTestPullRequestTask(ctx, doer, pr.BaseRepo.ID, pr.BaseBranch, false, "", "", 0)
 	}()
 
 	pr.MergedCommitID, err = doMergeAndPush(ctx, pr, doer, mergeStyle, expectedHeadCommitID, message)

services/pull/pull.go

@@ -295,113 +295,126 @@ func checkForInvalidation(ctx context.Context, requests issues_model.PullRequest
 
 // AddTestPullRequestTask adds new test tasks by given head/base repository and head/base branch,
 // and generate new patch for testing as needed.
-func AddTestPullRequestTask(doer *user_model.User, repoID int64, branch string, isSync bool, oldCommitID, newCommitID string) {
-	log.Trace("AddTestPullRequestTask [head_repo_id: %d, head_branch: %s]: finding pull requests", repoID, branch)
-	graceful.GetManager().RunWithShutdownContext(func(ctx context.Context) {
+func AddTestPullRequestTask(ctx context.Context, doer *user_model.User, repoID int64, branch string, isSync bool, oldCommitID, newCommitID string, timeNano int64) {
+	log.Trace("AddTestPullRequestTask [head_repo_id: %d, head_branch: %s]: only pull requests created before nano time %d will be considered", repoID, branch, timeNano)
+	go graceful.GetManager().RunWithShutdownContext(func(ctx context.Context) {
 		// There is no sensible way to shut this down ":-("
 		// If you don't let it run all the way then you will lose data
-		// TODO: graceful: AddTestPullRequestTask needs to become a queue!
+		// TODO: graceful: TestPullRequest needs to become a queue!
 
-		// GetUnmergedPullRequestsByHeadInfo() only return open and unmerged PR.
-		prs, err := issues_model.GetUnmergedPullRequestsByHeadInfo(ctx, repoID, branch)
-		if err != nil {
-			log.Error("Find pull requests [head_repo_id: %d, head_branch: %s]: %v", repoID, branch, err)
-			return
-		}
+		TestPullRequest(ctx, doer, repoID, timeNano, branch, isSync, oldCommitID, newCommitID)
+	})
+}
 
-		for _, pr := range prs {
-			log.Trace("Updating PR[%d]: composing new test task", pr.ID)
-			if pr.Flow == issues_model.PullRequestFlowGithub {
-				if err := PushToBaseRepo(ctx, pr); err != nil {
-					log.Error("PushToBaseRepo: %v", err)
-					continue
-				}
-			} else {
+func TestPullRequest(ctx context.Context, doer *user_model.User, repoID, olderThan int64, branch string, isSync bool, oldCommitID, newCommitID string) {
+	// Only consider PR that are older than olderThan, which is the time at
+	// which the newCommitID was added to repoID.
+	//
+	// * commit C is pushed
+	// * the git hook queues AddTestPullRequestTask for processing and returns with success
+	// * TestPullRequest is not called yet
+	// * a pull request P with commit C as the head is created
+	// * TestPullRequest runs and ignores P because it was created after the commit was received
+	//
+	// In other words, a PR must not be updated based on events that happened before it existed
+	prs, err := issues_model.GetUnmergedPullRequestsByHeadInfoMax(ctx, repoID, olderThan, branch)
+	if err != nil {
+		log.Error("Find pull requests [head_repo_id: %d, head_branch: %s]: %v", repoID, branch, err)
+		return
+	}
+
+	for _, pr := range prs {
+		log.Trace("Updating PR[id=%d,index=%d]: composing new test task", pr.ID, pr.Index)
+		if pr.Flow == issues_model.PullRequestFlowGithub {
+			if err := PushToBaseRepo(ctx, pr); err != nil {
+				log.Error("PushToBaseRepo: %v", err)
 				continue
 			}
-
-			AddToTaskQueue(ctx, pr)
-			comment, err := CreatePushPullComment(ctx, doer, pr, oldCommitID, newCommitID)
-			if err == nil && comment != nil {
-				notify_service.PullRequestPushCommits(ctx, doer, pr, comment)
-			}
+		} else {
+			continue
 		}
 
-		if isSync {
-			requests := issues_model.PullRequestList(prs)
-			if err = requests.LoadAttributes(ctx); err != nil {
-				log.Error("PullRequestList.LoadAttributes: %v", err)
-			}
-			if invalidationErr := checkForInvalidation(ctx, requests, repoID, doer, branch); invalidationErr != nil {
-				log.Error("checkForInvalidation: %v", invalidationErr)
-			}
-			if err == nil {
-				for _, pr := range prs {
-					objectFormat := git.ObjectFormatFromName(pr.BaseRepo.ObjectFormatName)
-					if newCommitID != "" && newCommitID != objectFormat.EmptyObjectID().String() {
-						changed, err := checkIfPRContentChanged(ctx, pr, oldCommitID, newCommitID)
-						if err != nil {
-							log.Error("checkIfPRContentChanged: %v", err)
-						}
-						if changed {
-							// Mark old reviews as stale if diff to mergebase has changed
-							if err := issues_model.MarkReviewsAsStale(ctx, pr.IssueID); err != nil {
-								log.Error("MarkReviewsAsStale: %v", err)
-							}
+		AddToTaskQueue(ctx, pr)
+		comment, err := CreatePushPullComment(ctx, doer, pr, oldCommitID, newCommitID)
+		if err == nil && comment != nil {
+			notify_service.PullRequestPushCommits(ctx, doer, pr, comment)
+		}
+	}
 
-							// dismiss all approval reviews if protected branch rule item enabled.
-							pb, err := git_model.GetFirstMatchProtectedBranchRule(ctx, pr.BaseRepoID, pr.BaseBranch)
-							if err != nil {
-								log.Error("GetFirstMatchProtectedBranchRule: %v", err)
-							}
-							if pb != nil && pb.DismissStaleApprovals {
-								if err := DismissApprovalReviews(ctx, doer, pr); err != nil {
-									log.Error("DismissApprovalReviews: %v", err)
-								}
-							}
+	if isSync {
+		requests := issues_model.PullRequestList(prs)
+		if err = requests.LoadAttributes(ctx); err != nil {
+			log.Error("PullRequestList.LoadAttributes: %v", err)
+		}
+		if invalidationErr := checkForInvalidation(ctx, requests, repoID, doer, branch); invalidationErr != nil {
+			log.Error("checkForInvalidation: %v", invalidationErr)
+		}
+		if err == nil {
+			for _, pr := range prs {
+				objectFormat := git.ObjectFormatFromName(pr.BaseRepo.ObjectFormatName)
+				if newCommitID != "" && newCommitID != objectFormat.EmptyObjectID().String() {
+					changed, err := checkIfPRContentChanged(ctx, pr, oldCommitID, newCommitID)
+					if err != nil {
+						log.Error("checkIfPRContentChanged: %v", err)
+					}
+					if changed {
+						// Mark old reviews as stale if diff to mergebase has changed
+						if err := issues_model.MarkReviewsAsStale(ctx, pr.IssueID); err != nil {
+							log.Error("MarkReviewsAsStale: %v", err)
 						}
-						if err := issues_model.MarkReviewsAsNotStale(ctx, pr.IssueID, newCommitID); err != nil {
-							log.Error("MarkReviewsAsNotStale: %v", err)
-						}
-						divergence, err := GetDiverging(ctx, pr)
+
+						// dismiss all approval reviews if protected branch rule item enabled.
+						pb, err := git_model.GetFirstMatchProtectedBranchRule(ctx, pr.BaseRepoID, pr.BaseBranch)
 						if err != nil {
-							log.Error("GetDiverging: %v", err)
-						} else {
-							err = pr.UpdateCommitDivergence(ctx, divergence.Ahead, divergence.Behind)
-							if err != nil {
-								log.Error("UpdateCommitDivergence: %v", err)
+							log.Error("GetFirstMatchProtectedBranchRule: %v", err)
+						}
+						if pb != nil && pb.DismissStaleApprovals {
+							if err := DismissApprovalReviews(ctx, doer, pr); err != nil {
+								log.Error("DismissApprovalReviews: %v", err)
 							}
 						}
 					}
-
-					notify_service.PullRequestSynchronized(ctx, doer, pr)
+					if err := issues_model.MarkReviewsAsNotStale(ctx, pr.IssueID, newCommitID); err != nil {
+						log.Error("MarkReviewsAsNotStale: %v", err)
+					}
+					divergence, err := GetDiverging(ctx, pr)
+					if err != nil {
+						log.Error("GetDiverging: %v", err)
+					} else {
+						err = pr.UpdateCommitDivergence(ctx, divergence.Ahead, divergence.Behind)
+						if err != nil {
+							log.Error("UpdateCommitDivergence: %v", err)
+						}
+					}
 				}
+
+				notify_service.PullRequestSynchronized(ctx, doer, pr)
 			}
 		}
+	}
 
-		log.Trace("AddTestPullRequestTask [base_repo_id: %d, base_branch: %s]: finding pull requests", repoID, branch)
-		prs, err = issues_model.GetUnmergedPullRequestsByBaseInfo(ctx, repoID, branch)
+	log.Trace("TestPullRequest [base_repo_id: %d, base_branch: %s]: finding pull requests", repoID, branch)
+	prs, err = issues_model.GetUnmergedPullRequestsByBaseInfo(ctx, repoID, branch)
+	if err != nil {
+		log.Error("Find pull requests [base_repo_id: %d, base_branch: %s]: %v", repoID, branch, err)
+		return
+	}
+	for _, pr := range prs {
+		divergence, err := GetDiverging(ctx, pr)
 		if err != nil {
-			log.Error("Find pull requests [base_repo_id: %d, base_branch: %s]: %v", repoID, branch, err)
-			return
-		}
-		for _, pr := range prs {
-			divergence, err := GetDiverging(ctx, pr)
-			if err != nil {
-				if git_model.IsErrBranchNotExist(err) && !git.IsBranchExist(ctx, pr.HeadRepo.RepoPath(), pr.HeadBranch) {
-					log.Warn("Cannot test PR %s/%d: head_branch %s no longer exists", pr.BaseRepo.Name, pr.IssueID, pr.HeadBranch)
-				} else {
-					log.Error("GetDiverging: %v", err)
-				}
+			if git_model.IsErrBranchNotExist(err) && !git.IsBranchExist(ctx, pr.HeadRepo.RepoPath(), pr.HeadBranch) {
+				log.Warn("Cannot test PR %s/%d: head_branch %s no longer exists", pr.BaseRepo.Name, pr.IssueID, pr.HeadBranch)
 			} else {
-				err = pr.UpdateCommitDivergence(ctx, divergence.Ahead, divergence.Behind)
-				if err != nil {
-					log.Error("UpdateCommitDivergence: %v", err)
-				}
+				log.Error("GetDiverging: %v", err)
+			}
+		} else {
+			err = pr.UpdateCommitDivergence(ctx, divergence.Ahead, divergence.Behind)
+			if err != nil {
+				log.Error("UpdateCommitDivergence: %v", err)
 			}
-			AddToTaskQueue(ctx, pr)
 		}
-	})
+		AddToTaskQueue(ctx, pr)
+	}
 }
 
 // checkIfPRContentChanged checks if diff to target branch has changed by push

services/pull/update.go

@@ -36,7 +36,7 @@ func Update(ctx context.Context, pr *issues_model.PullRequest, doer *user_model.
 
 	if rebase {
 		defer func() {
-			go AddTestPullRequestTask(doer, pr.BaseRepo.ID, pr.BaseBranch, false, "", "")
+			AddTestPullRequestTask(ctx, doer, pr.BaseRepo.ID, pr.BaseBranch, false, "", "", 0)
 		}()
 
 		return updateHeadByRebaseOnToBase(ctx, pr, doer, message)
@@ -75,7 +75,7 @@ func Update(ctx context.Context, pr *issues_model.PullRequest, doer *user_model.
 	_, err = doMergeAndPush(ctx, reversePR, doer, repo_model.MergeStyleMerge, "", message)
 
 	defer func() {
-		go AddTestPullRequestTask(doer, reversePR.HeadRepo.ID, reversePR.HeadBranch, false, "", "")
+		AddTestPullRequestTask(ctx, doer, reversePR.HeadRepo.ID, reversePR.HeadBranch, false, "", "", 0)
 	}()
 
 	return err

services/repository/push.go

@@ -166,7 +166,7 @@ func pushUpdates(optsList []*repo_module.PushUpdateOptions) error {
 			branch := opts.RefFullName.BranchName()
 			if !opts.IsDelRef() {
 				log.Trace("TriggerTask '%s/%s' by %s", repo.Name, branch, pusher.Name)
-				go pull_service.AddTestPullRequestTask(pusher, repo.ID, branch, true, opts.OldCommitID, opts.NewCommitID)
+				pull_service.AddTestPullRequestTask(ctx, pusher, repo.ID, branch, true, opts.OldCommitID, opts.NewCommitID, opts.TimeNano)
 
 				newCommit, err := gitRepo.GetCommit(opts.NewCommitID)
 				if err != nil {

tests/integration/pull_request_task_test.go

@@ -0,0 +1,109 @@
+// Copyright 2024 The Forgejo Authors
+// SPDX-License-Identifier: MIT
+
+package integration
+
+import (
+	"context"
+	"testing"
+	"time"
+
+	"code.gitea.io/gitea/models/db"
+	issues_model "code.gitea.io/gitea/models/issues"
+	repo_model "code.gitea.io/gitea/models/repo"
+	"code.gitea.io/gitea/models/unittest"
+	user_model "code.gitea.io/gitea/models/user"
+	"code.gitea.io/gitea/modules/git"
+	"code.gitea.io/gitea/modules/log"
+	repo_module "code.gitea.io/gitea/modules/repository"
+	"code.gitea.io/gitea/modules/test"
+	"code.gitea.io/gitea/modules/timeutil"
+	pull_service "code.gitea.io/gitea/services/pull"
+	repo_service "code.gitea.io/gitea/services/repository"
+	"code.gitea.io/gitea/tests"
+
+	"github.com/stretchr/testify/assert"
+	"github.com/stretchr/testify/require"
+)
+
+func TestPullRequestSynchronized(t *testing.T) {
+	defer tests.PrepareTestEnv(t)()
+
+	// unmerged pull request of user2/repo1 from branch2 to master
+	pull := unittest.AssertExistsAndLoadBean(t, &issues_model.PullRequest{ID: 2})
+	// tip of tests/gitea-repositories-meta/user2/repo1 branch2
+	pull.HeadCommitID = "985f0301dba5e7b34be866819cd15ad3d8f508ee"
+	pull.LoadIssue(db.DefaultContext)
+	pull.Issue.Created = timeutil.TimeStampNanoNow()
+	issues_model.UpdateIssueCols(db.DefaultContext, pull.Issue, "created")
+
+	require.Equal(t, pull.HeadRepoID, pull.BaseRepoID)
+	repo := unittest.AssertExistsAndLoadBean(t, &repo_model.Repository{ID: pull.HeadRepoID})
+	owner := unittest.AssertExistsAndLoadBean(t, &user_model.User{ID: repo.OwnerID})
+
+	for _, testCase := range []struct {
+		name     string
+		timeNano int64
+		expected bool
+	}{
+		{
+			name:     "AddTestPullRequestTask process PR",
+			timeNano: int64(pull.Issue.Created),
+			expected: true,
+		},
+		{
+			name:     "AddTestPullRequestTask skip PR",
+			timeNano: 0,
+			expected: false,
+		},
+	} {
+		t.Run(testCase.name, func(t *testing.T) {
+			logChecker, cleanup := test.NewLogChecker(log.DEFAULT, log.TRACE)
+			logChecker.Filter("Updating PR").StopMark("TestPullRequest ")
+			defer cleanup()
+
+			opt := &repo_module.PushUpdateOptions{
+				PusherID:     owner.ID,
+				PusherName:   owner.Name,
+				RepoUserName: owner.Name,
+				RepoName:     repo.Name,
+				RefFullName:  git.RefName("refs/heads/branch2"),
+				OldCommitID:  pull.HeadCommitID,
+				NewCommitID:  pull.HeadCommitID,
+				TimeNano:     testCase.timeNano,
+			}
+			require.NoError(t, repo_service.PushUpdate(opt))
+			logFiltered, logStopped := logChecker.Check(5 * time.Second)
+			assert.True(t, logStopped)
+			assert.Equal(t, testCase.expected, logFiltered[0])
+		})
+	}
+
+	for _, testCase := range []struct {
+		name      string
+		olderThan int64
+		expected  bool
+	}{
+		{
+			name:      "TestPullRequest process PR",
+			olderThan: int64(pull.Issue.Created),
+			expected:  true,
+		},
+		{
+			name:      "TestPullRequest skip PR",
+			olderThan: int64(pull.Issue.Created) - 1,
+			expected:  false,
+		},
+	} {
+		t.Run(testCase.name, func(t *testing.T) {
+			logChecker, cleanup := test.NewLogChecker(log.DEFAULT, log.TRACE)
+			logChecker.Filter("Updating PR").StopMark("TestPullRequest ")
+			defer cleanup()
+
+			pull_service.TestPullRequest(context.Background(), owner, repo.ID, testCase.olderThan, "branch2", true, pull.HeadCommitID, pull.HeadCommitID)
+			logFiltered, logStopped := logChecker.Check(5 * time.Second)
+			assert.True(t, logStopped)
+			assert.Equal(t, testCase.expected, logFiltered[0])
+		})
+	}
+}