aboutsummaryrefslogtreecommitdiff
path: root/services/pull/pull.go
blob: d8923d0d57251b7a0e04630e1654b34c1c764542 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
// Copyright 2019 The Gitea Authors. All rights reserved.
// SPDX-License-Identifier: MIT

package pull

import (
	"context"
	"fmt"
	"io"
	"os"
	"regexp"
	"strings"

	"code.gitea.io/gitea/models"
	"code.gitea.io/gitea/models/db"
	git_model "code.gitea.io/gitea/models/git"
	issues_model "code.gitea.io/gitea/models/issues"
	repo_model "code.gitea.io/gitea/models/repo"
	user_model "code.gitea.io/gitea/models/user"
	"code.gitea.io/gitea/modules/container"
	"code.gitea.io/gitea/modules/git"
	"code.gitea.io/gitea/modules/graceful"
	"code.gitea.io/gitea/modules/json"
	"code.gitea.io/gitea/modules/log"
	"code.gitea.io/gitea/modules/notification"
	"code.gitea.io/gitea/modules/process"
	repo_module "code.gitea.io/gitea/modules/repository"
	"code.gitea.io/gitea/modules/setting"
	"code.gitea.io/gitea/modules/sync"
	"code.gitea.io/gitea/modules/util"
	issue_service "code.gitea.io/gitea/services/issue"
)

// TODO: use clustered lock (unique queue? or *abuse* cache)
var pullWorkingPool = sync.NewExclusivePool()

// NewPullRequest creates new pull request with labels for repository.
func NewPullRequest(ctx context.Context, repo *repo_model.Repository, pull *issues_model.Issue, labelIDs []int64, uuids []string, pr *issues_model.PullRequest, assigneeIDs []int64) error {
	if err := TestPatch(pr); err != nil {
		return err
	}

	divergence, err := GetDiverging(ctx, pr)
	if err != nil {
		return err
	}
	pr.CommitsAhead = divergence.Ahead
	pr.CommitsBehind = divergence.Behind

	if err := issues_model.NewPullRequest(ctx, repo, pull, labelIDs, uuids, pr); err != nil {
		return err
	}

	for _, assigneeID := range assigneeIDs {
		if err := issue_service.AddAssigneeIfNotAssigned(pull, pull.Poster, assigneeID); err != nil {
			return err
		}
	}

	pr.Issue = pull
	pull.PullRequest = pr

	// Now - even if the request context has been cancelled as the PR has been created
	// in the db and there is no way to cancel that transaction we have to proceed - therefore
	// create new context and work from there
	prCtx, _, finished := process.GetManager().AddContext(graceful.GetManager().HammerContext(), fmt.Sprintf("NewPullRequest: %s:%d", repo.FullName(), pr.Index))
	defer finished()

	if pr.Flow == issues_model.PullRequestFlowGithub {
		err = PushToBaseRepo(prCtx, pr)
	} else {
		err = UpdateRef(prCtx, pr)
	}
	if err != nil {
		return err
	}

	mentions, err := issues_model.FindAndUpdateIssueMentions(ctx, pull, pull.Poster, pull.Content)
	if err != nil {
		return err
	}

	notification.NotifyNewPullRequest(prCtx, pr, mentions)
	if len(pull.Labels) > 0 {
		notification.NotifyIssueChangeLabels(prCtx, pull.Poster, pull, pull.Labels, nil)
	}
	if pull.Milestone != nil {
		notification.NotifyIssueChangeMilestone(prCtx, pull.Poster, pull, 0)
	}

	// add first push codes comment
	baseGitRepo, err := git.OpenRepository(prCtx, pr.BaseRepo.RepoPath())
	if err != nil {
		return err
	}
	defer baseGitRepo.Close()

	compareInfo, err := baseGitRepo.GetCompareInfo(pr.BaseRepo.RepoPath(),
		git.BranchPrefix+pr.BaseBranch, pr.GetGitRefName(), false, false)
	if err != nil {
		return err
	}

	if len(compareInfo.Commits) > 0 {
		data := issues_model.PushActionContent{IsForcePush: false}
		data.CommitIDs = make([]string, 0, len(compareInfo.Commits))
		for i := len(compareInfo.Commits) - 1; i >= 0; i-- {
			data.CommitIDs = append(data.CommitIDs, compareInfo.Commits[i].ID.String())
		}

		dataJSON, err := json.Marshal(data)
		if err != nil {
			return err
		}

		ops := &issues_model.CreateCommentOptions{
			Type:        issues_model.CommentTypePullRequestPush,
			Doer:        pull.Poster,
			Repo:        repo,
			Issue:       pr.Issue,
			IsForcePush: false,
			Content:     string(dataJSON),
		}

		_, _ = issue_service.CreateComment(ops)
	}

	return nil
}

// ChangeTargetBranch changes the target branch of this pull request, as the given user.
func ChangeTargetBranch(ctx context.Context, pr *issues_model.PullRequest, doer *user_model.User, targetBranch string) (err error) {
	pullWorkingPool.CheckIn(fmt.Sprint(pr.ID))
	defer pullWorkingPool.CheckOut(fmt.Sprint(pr.ID))

	// Current target branch is already the same
	if pr.BaseBranch == targetBranch {
		return nil
	}

	if pr.Issue.IsClosed {
		return issues_model.ErrIssueIsClosed{
			ID:     pr.Issue.ID,
			RepoID: pr.Issue.RepoID,
			Index:  pr.Issue.Index,
		}
	}

	if pr.HasMerged {
		return models.ErrPullRequestHasMerged{
			ID:         pr.ID,
			IssueID:    pr.Index,
			HeadRepoID: pr.HeadRepoID,
			BaseRepoID: pr.BaseRepoID,
			HeadBranch: pr.HeadBranch,
			BaseBranch: pr.BaseBranch,
		}
	}

	// Check if branches are equal
	branchesEqual, err := IsHeadEqualWithBranch(ctx, pr, targetBranch)
	if err != nil {
		return err
	}
	if branchesEqual {
		return models.ErrBranchesEqual{
			HeadBranchName: pr.HeadBranch,
			BaseBranchName: targetBranch,
		}
	}

	// Check if pull request for the new target branch already exists
	existingPr, err := issues_model.GetUnmergedPullRequest(ctx, pr.HeadRepoID, pr.BaseRepoID, pr.HeadBranch, targetBranch, issues_model.PullRequestFlowGithub)
	if existingPr != nil {
		return issues_model.ErrPullRequestAlreadyExists{
			ID:         existingPr.ID,
			IssueID:    existingPr.Index,
			HeadRepoID: existingPr.HeadRepoID,
			BaseRepoID: existingPr.BaseRepoID,
			HeadBranch: existingPr.HeadBranch,
			BaseBranch: existingPr.BaseBranch,
		}
	}
	if err != nil && !issues_model.IsErrPullRequestNotExist(err) {
		return err
	}

	// Set new target branch
	oldBranch := pr.BaseBranch
	pr.BaseBranch = targetBranch

	// Refresh patch
	if err := TestPatch(pr); err != nil {
		return err
	}

	// Update target branch, PR diff and status
	// This is the same as checkAndUpdateStatus in check service, but also updates base_branch
	if pr.Status == issues_model.PullRequestStatusChecking {
		pr.Status = issues_model.PullRequestStatusMergeable
	}

	// Update Commit Divergence
	divergence, err := GetDiverging(ctx, pr)
	if err != nil {
		return err
	}
	pr.CommitsAhead = divergence.Ahead
	pr.CommitsBehind = divergence.Behind

	if err := pr.UpdateColsIfNotMerged(ctx, "merge_base", "status", "conflicted_files", "changed_protected_files", "base_branch", "commits_ahead", "commits_behind"); err != nil {
		return err
	}

	// Create comment
	options := &issues_model.CreateCommentOptions{
		Type:   issues_model.CommentTypeChangeTargetBranch,
		Doer:   doer,
		Repo:   pr.Issue.Repo,
		Issue:  pr.Issue,
		OldRef: oldBranch,
		NewRef: targetBranch,
	}
	if _, err = issue_service.CreateComment(options); err != nil {
		return fmt.Errorf("CreateChangeTargetBranchComment: %w", err)
	}

	return nil
}

func checkForInvalidation(ctx context.Context, requests issues_model.PullRequestList, repoID int64, doer *user_model.User, branch string) error {
	repo, err := repo_model.GetRepositoryByID(ctx, repoID)
	if err != nil {
		return fmt.Errorf("GetRepositoryByIDCtx: %w", err)
	}
	gitRepo, err := git.OpenRepository(ctx, repo.RepoPath())
	if err != nil {
		return fmt.Errorf("git.OpenRepository: %w", err)
	}
	go func() {
		// FIXME: graceful: We need to tell the manager we're doing something...
		err := InvalidateCodeComments(ctx, requests, doer, gitRepo, branch)
		if err != nil {
			log.Error("PullRequestList.InvalidateCodeComments: %v", err)
		}
		gitRepo.Close()
	}()
	return nil
}

// 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) {
		// 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!

		prs, err := issues_model.GetUnmergedPullRequestsByHeadInfo(repoID, branch, true)
		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[%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 {
				continue
			}

			AddToTaskQueue(pr)
			comment, err := CreatePushPullComment(ctx, doer, pr, oldCommitID, newCommitID)
			if err == nil && comment != nil {
				notification.NotifyPullRequestPushCommits(ctx, doer, pr, comment)
			}
		}

		if isSync {
			requests := issues_model.PullRequestList(prs)
			if err = requests.LoadAttributes(); 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 {
					if newCommitID != "" && newCommitID != git.EmptySHA {
						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(pr.IssueID); err != nil {
								log.Error("MarkReviewsAsStale: %v", err)
							}
						}
						if err := issues_model.MarkReviewsAsNotStale(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)
							}
						}
					}

					notification.NotifyPullRequestSynchronized(ctx, doer, pr)
				}
			}
		}

		log.Trace("AddTestPullRequestTask [base_repo_id: %d, base_branch: %s]: finding pull requests", repoID, branch)
		prs, err = issues_model.GetUnmergedPullRequestsByBaseInfo(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 {
				if models.IsErrBranchDoesNotExist(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)
				}
			} else {
				err = pr.UpdateCommitDivergence(ctx, divergence.Ahead, divergence.Behind)
				if err != nil {
					log.Error("UpdateCommitDivergence: %v", err)
				}
			}
			AddToTaskQueue(pr)
		}
	})
}

// checkIfPRContentChanged checks if diff to target branch has changed by push
// A commit can be considered to leave the PR untouched if the patch/diff with its merge base is unchanged
func checkIfPRContentChanged(ctx context.Context, pr *issues_model.PullRequest, oldCommitID, newCommitID string) (hasChanged bool, err error) {
	prCtx, cancel, err := createTemporaryRepoForPR(ctx, pr)
	if err != nil {
		log.Error("CreateTemporaryRepoForPR %-v: %v", pr, err)
		return false, err
	}
	defer cancel()

	tmpRepo, err := git.OpenRepository(ctx, prCtx.tmpBasePath)
	if err != nil {
		return false, fmt.Errorf("OpenRepository: %w", err)
	}
	defer tmpRepo.Close()

	// Find the merge-base
	_, base, err := tmpRepo.GetMergeBase("", "base", "tracking")
	if err != nil {
		return false, fmt.Errorf("GetMergeBase: %w", err)
	}

	cmd := git.NewCommand(ctx, "diff", "--name-only", "-z").AddDynamicArguments(newCommitID, oldCommitID, base)
	stdoutReader, stdoutWriter, err := os.Pipe()
	if err != nil {
		return false, fmt.Errorf("unable to open pipe for to run diff: %w", err)
	}

	if err := cmd.Run(&git.RunOpts{
		Dir:    prCtx.tmpBasePath,
		Stdout: stdoutWriter,
		PipelineFunc: func(ctx context.Context, cancel context.CancelFunc) error {
			_ = stdoutWriter.Close()
			defer func() {
				_ = stdoutReader.Close()
			}()
			return util.IsEmptyReader(stdoutReader)
		},
	}); err != nil {
		if err == util.ErrNotEmpty {
			return true, nil
		}

		log.Error("Unable to run diff on %s %s %s in tempRepo for PR[%d]%s/%s...%s/%s: Error: %v",
			newCommitID, oldCommitID, base,
			pr.ID, pr.BaseRepo.FullName(), pr.BaseBranch, pr.HeadRepo.FullName(), pr.HeadBranch,
			err)

		return false, fmt.Errorf("Unable to run git diff --name-only -z %s %s %s: %w", newCommitID, oldCommitID, base, err)
	}

	return false, nil
}

// PushToBaseRepo pushes commits from branches of head repository to
// corresponding branches of base repository.
// FIXME: Only push branches that are actually updates?
func PushToBaseRepo(ctx context.Context, pr *issues_model.PullRequest) (err error) {
	return pushToBaseRepoHelper(ctx, pr, "")
}

func pushToBaseRepoHelper(ctx context.Context, pr *issues_model.PullRequest, prefixHeadBranch string) (err error) {
	log.Trace("PushToBaseRepo[%d]: pushing commits to base repo '%s'", pr.BaseRepoID, pr.GetGitRefName())

	if err := pr.LoadHeadRepo(ctx); err != nil {
		log.Error("Unable to load head repository for PR[%d] Error: %v", pr.ID, err)
		return err
	}
	headRepoPath := pr.HeadRepo.RepoPath()

	if err := pr.LoadBaseRepo(ctx); err != nil {
		log.Error("Unable to load base repository for PR[%d] Error: %v", pr.ID, err)
		return err
	}
	baseRepoPath := pr.BaseRepo.RepoPath()

	if err = pr.LoadIssue(ctx); err != nil {
		return fmt.Errorf("unable to load issue %d for pr %d: %w", pr.IssueID, pr.ID, err)
	}
	if err = pr.Issue.LoadPoster(ctx); err != nil {
		return fmt.Errorf("unable to load poster %d for pr %d: %w", pr.Issue.PosterID, pr.ID, err)
	}

	gitRefName := pr.GetGitRefName()

	if err := git.Push(ctx, headRepoPath, git.PushOptions{
		Remote: baseRepoPath,
		Branch: prefixHeadBranch + pr.HeadBranch + ":" + gitRefName,
		Force:  true,
		// Use InternalPushingEnvironment here because we know that pre-receive and post-receive do not run on a refs/pulls/...
		Env: repo_module.InternalPushingEnvironment(pr.Issue.Poster, pr.BaseRepo),
	}); err != nil {
		if git.IsErrPushOutOfDate(err) {
			// This should not happen as we're using force!
			log.Error("Unable to push PR head for %s#%d (%-v:%s) due to ErrPushOfDate: %v", pr.BaseRepo.FullName(), pr.Index, pr.BaseRepo, gitRefName, err)
			return err
		} else if git.IsErrPushRejected(err) {
			rejectErr := err.(*git.ErrPushRejected)
			log.Info("Unable to push PR head for %s#%d (%-v:%s) due to rejection:\nStdout: %s\nStderr: %s\nError: %v", pr.BaseRepo.FullName(), pr.Index, pr.BaseRepo, gitRefName, rejectErr.StdOut, rejectErr.StdErr, rejectErr.Err)
			return err
		} else if git.IsErrMoreThanOne(err) {
			if prefixHeadBranch != "" {
				log.Info("Can't push with %s%s", prefixHeadBranch, pr.HeadBranch)
				return err
			}
			log.Info("Retrying to push with %s%s", git.BranchPrefix, pr.HeadBranch)
			err = pushToBaseRepoHelper(ctx, pr, git.BranchPrefix)
			return err
		}
		log.Error("Unable to push PR head for %s#%d (%-v:%s) due to Error: %v", pr.BaseRepo.FullName(), pr.Index, pr.BaseRepo, gitRefName, err)
		return fmt.Errorf("Push: %s:%s %s:%s %w", pr.HeadRepo.FullName(), pr.HeadBranch, pr.BaseRepo.FullName(), gitRefName, err)
	}

	return nil
}

// UpdateRef update refs/pull/id/head directly for agit flow pull request
func UpdateRef(ctx context.Context, pr *issues_model.PullRequest) (err error) {
	log.Trace("UpdateRef[%d]: upgate pull request ref in base repo '%s'", pr.ID, pr.GetGitRefName())
	if err := pr.LoadBaseRepo(ctx); err != nil {
		log.Error("Unable to load base repository for PR[%d] Error: %v", pr.ID, err)
		return err
	}

	_, _, err = git.NewCommand(ctx, "update-ref").AddDynamicArguments(pr.GetGitRefName(), pr.HeadCommitID).RunStdString(&git.RunOpts{Dir: pr.BaseRepo.RepoPath()})
	if err != nil {
		log.Error("Unable to update ref in base repository for PR[%d] Error: %v", pr.ID, err)
	}

	return err
}

type errlist []error

func (errs errlist) Error() string {
	if len(errs) > 0 {
		var buf strings.Builder
		for i, err := range errs {
			if i > 0 {
				buf.WriteString(", ")
			}
			buf.WriteString(err.Error())
		}
		return buf.String()
	}
	return ""
}

// CloseBranchPulls close all the pull requests who's head branch is the branch
func CloseBranchPulls(doer *user_model.User, repoID int64, branch string) error {
	prs, err := issues_model.GetUnmergedPullRequestsByHeadInfo(repoID, branch, false)
	if err != nil {
		return err
	}

	prs2, err := issues_model.GetUnmergedPullRequestsByBaseInfo(repoID, branch)
	if err != nil {
		return err
	}

	prs = append(prs, prs2...)
	if err := issues_model.PullRequestList(prs).LoadAttributes(); err != nil {
		return err
	}

	var errs errlist
	for _, pr := range prs {
		if err = issue_service.ChangeStatus(pr.Issue, doer, "", true); err != nil && !issues_model.IsErrPullWasClosed(err) && !issues_model.IsErrDependenciesLeft(err) {
			errs = append(errs, err)
		}
	}
	if len(errs) > 0 {
		return errs
	}
	return nil
}

// CloseRepoBranchesPulls close all pull requests which head branches are in the given repository, but only whose base repo is not in the given repository
func CloseRepoBranchesPulls(ctx context.Context, doer *user_model.User, repo *repo_model.Repository) error {
	branches, _, err := git.GetBranchesByPath(ctx, repo.RepoPath(), 0, 0)
	if err != nil {
		return err
	}

	var errs errlist
	for _, branch := range branches {
		prs, err := issues_model.GetUnmergedPullRequestsByHeadInfo(repo.ID, branch.Name, false)
		if err != nil {
			return err
		}

		if err = issues_model.PullRequestList(prs).LoadAttributes(); err != nil {
			return err
		}

		for _, pr := range prs {
			// If the base repository for this pr is this repository there is no need to close it
			// as it is going to be deleted anyway
			if pr.BaseRepoID == repo.ID {
				continue
			}
			if err = issue_service.ChangeStatus(pr.Issue, doer, "", true); err != nil && !issues_model.IsErrPullWasClosed(err) {
				errs = append(errs, err)
			}
		}
	}

	if len(errs) > 0 {
		return errs
	}
	return nil
}

var commitMessageTrailersPattern = regexp.MustCompile(`(?:^|\n\n)(?:[\w-]+[ \t]*:[^\n]+\n*(?:[ \t]+[^\n]+\n*)*)+$`)

// GetSquashMergeCommitMessages returns the commit messages between head and merge base (if there is one)
func GetSquashMergeCommitMessages(ctx context.Context, pr *issues_model.PullRequest) string {
	if err := pr.LoadIssue(ctx); err != nil {
		log.Error("Cannot load issue %d for PR id %d: Error: %v", pr.IssueID, pr.ID, err)
		return ""
	}

	if err := pr.Issue.LoadPoster(ctx); err != nil {
		log.Error("Cannot load poster %d for pr id %d, index %d Error: %v", pr.Issue.PosterID, pr.ID, pr.Index, err)
		return ""
	}

	if pr.HeadRepo == nil {
		var err error
		pr.HeadRepo, err = repo_model.GetRepositoryByID(ctx, pr.HeadRepoID)
		if err != nil {
			log.Error("GetRepositoryByIdCtx[%d]: %v", pr.HeadRepoID, err)
			return ""
		}
	}

	gitRepo, closer, err := git.RepositoryFromContextOrOpen(ctx, pr.HeadRepo.RepoPath())
	if err != nil {
		log.Error("Unable to open head repository: Error: %v", err)
		return ""
	}
	defer closer.Close()

	var headCommit *git.Commit
	if pr.Flow == issues_model.PullRequestFlowGithub {
		headCommit, err = gitRepo.GetBranchCommit(pr.HeadBranch)
	} else {
		pr.HeadCommitID, err = gitRepo.GetRefCommitID(pr.GetGitRefName())
		if err != nil {
			log.Error("Unable to get head commit: %s Error: %v", pr.GetGitRefName(), err)
			return ""
		}
		headCommit, err = gitRepo.GetCommit(pr.HeadCommitID)
	}
	if err != nil {
		log.Error("Unable to get head commit: %s Error: %v", pr.HeadBranch, err)
		return ""
	}

	mergeBase, err := gitRepo.GetCommit(pr.MergeBase)
	if err != nil {
		log.Error("Unable to get merge base commit: %s Error: %v", pr.MergeBase, err)
		return ""
	}

	limit := setting.Repository.PullRequest.DefaultMergeMessageCommitsLimit

	commits, err := gitRepo.CommitsBetweenLimit(headCommit, mergeBase, limit, 0)
	if err != nil {
		log.Error("Unable to get commits between: %s %s Error: %v", pr.HeadBranch, pr.MergeBase, err)
		return ""
	}

	posterSig := pr.Issue.Poster.NewGitSig().String()

	uniqueAuthors := make(container.Set[string])
	authors := make([]string, 0, len(commits))
	stringBuilder := strings.Builder{}

	if !setting.Repository.PullRequest.PopulateSquashCommentWithCommitMessages {
		message := strings.TrimSpace(pr.Issue.Content)
		stringBuilder.WriteString(message)
		if stringBuilder.Len() > 0 {
			stringBuilder.WriteRune('\n')
			if !commitMessageTrailersPattern.MatchString(message) {
				stringBuilder.WriteRune('\n')
			}
		}
	}

	// commits list is in reverse chronological order
	first := true
	for i := len(commits) - 1; i >= 0; i-- {
		commit := commits[i]

		if setting.Repository.PullRequest.PopulateSquashCommentWithCommitMessages {
			maxSize := setting.Repository.PullRequest.DefaultMergeMessageSize
			if maxSize < 0 || stringBuilder.Len() < maxSize {
				var toWrite []byte
				if first {
					first = false
					toWrite = []byte(strings.TrimPrefix(commit.CommitMessage, pr.Issue.Title))
				} else {
					toWrite = []byte(commit.CommitMessage)
				}

				if len(toWrite) > maxSize-stringBuilder.Len() && maxSize > -1 {
					toWrite = append(toWrite[:maxSize-stringBuilder.Len()], "..."...)
				}
				if _, err := stringBuilder.Write(toWrite); err != nil {
					log.Error("Unable to write commit message Error: %v", err)
					return ""
				}

				if _, err := stringBuilder.WriteRune('\n'); err != nil {
					log.Error("Unable to write commit message Error: %v", err)
					return ""
				}
			}
		}

		authorString := commit.Author.String()
		if uniqueAuthors.Add(authorString) && authorString != posterSig {
			authors = append(authors, authorString)
		}
	}

	// Consider collecting the remaining authors
	if limit >= 0 && setting.Repository.PullRequest.DefaultMergeMessageAllAuthors {
		skip := limit
		limit = 30
		for {
			commits, err := gitRepo.CommitsBetweenLimit(headCommit, mergeBase, limit, skip)
			if err != nil {
				log.Error("Unable to get commits between: %s %s Error: %v", pr.HeadBranch, pr.MergeBase, err)
				return ""

			}
			if len(commits) == 0 {
				break
			}
			for _, commit := range commits {
				authorString := commit.Author.String()
				if uniqueAuthors.Add(authorString) && authorString != posterSig {
					authors = append(authors, authorString)
				}
			}
			skip += limit
		}
	}

	for _, author := range authors {
		if _, err := stringBuilder.Write([]byte("Co-authored-by: ")); err != nil {
			log.Error("Unable to write to string builder Error: %v", err)
			return ""
		}
		if _, err := stringBuilder.Write([]byte(author)); err != nil {
			log.Error("Unable to write to string builder Error: %v", err)
			return ""
		}
		if _, err := stringBuilder.WriteRune('\n'); err != nil {
			log.Error("Unable to write to string builder Error: %v", err)
			return ""
		}
	}

	return stringBuilder.String()
}

// GetIssuesLastCommitStatus returns a map of issue ID to the most recent commit's latest status
func GetIssuesLastCommitStatus(ctx context.Context, issues issues_model.IssueList) (map[int64]*git_model.CommitStatus, error) {
	_, lastStatus, err := GetIssuesAllCommitStatus(ctx, issues)
	return lastStatus, err
}

// GetIssuesAllCommitStatus returns a map of issue ID to a list of all statuses for the most recent commit as well as a map of issue ID to only the commit's latest status
func GetIssuesAllCommitStatus(ctx context.Context, issues issues_model.IssueList) (map[int64][]*git_model.CommitStatus, map[int64]*git_model.CommitStatus, error) {
	if err := issues.LoadPullRequests(ctx); err != nil {
		return nil, nil, err
	}
	if _, err := issues.LoadRepositories(ctx); err != nil {
		return nil, nil, err
	}

	var (
		gitRepos = make(map[int64]*git.Repository)
		res      = make(map[int64][]*git_model.CommitStatus)
		lastRes  = make(map[int64]*git_model.CommitStatus)
		err      error
	)
	defer func() {
		for _, gitRepo := range gitRepos {
			gitRepo.Close()
		}
	}()

	for _, issue := range issues {
		if !issue.IsPull {
			continue
		}
		gitRepo, ok := gitRepos[issue.RepoID]
		if !ok {
			gitRepo, err = git.OpenRepository(ctx, issue.Repo.RepoPath())
			if err != nil {
				log.Error("Cannot open git repository %-v for issue #%d[%d]. Error: %v", issue.Repo, issue.Index, issue.ID, err)
				continue
			}
			gitRepos[issue.RepoID] = gitRepo
		}

		statuses, lastStatus, err := getAllCommitStatus(gitRepo, issue.PullRequest)
		if err != nil {
			log.Error("getAllCommitStatus: cant get commit statuses of pull [%d]: %v", issue.PullRequest.ID, err)
			continue
		}
		res[issue.PullRequest.ID] = statuses
		lastRes[issue.PullRequest.ID] = lastStatus
	}
	return res, lastRes, nil
}

// getAllCommitStatus get pr's commit statuses.
func getAllCommitStatus(gitRepo *git.Repository, pr *issues_model.PullRequest) (statuses []*git_model.CommitStatus, lastStatus *git_model.CommitStatus, err error) {
	sha, shaErr := gitRepo.GetRefCommitID(pr.GetGitRefName())
	if shaErr != nil {
		return nil, nil, shaErr
	}

	statuses, _, err = git_model.GetLatestCommitStatus(db.DefaultContext, pr.BaseRepo.ID, sha, db.ListOptions{})
	lastStatus = git_model.CalcCommitStatus(statuses)
	return statuses, lastStatus, err
}

// IsHeadEqualWithBranch returns if the commits of branchName are available in pull request head
func IsHeadEqualWithBranch(ctx context.Context, pr *issues_model.PullRequest, branchName string) (bool, error) {
	var err error
	if err = pr.LoadBaseRepo(ctx); err != nil {
		return false, err
	}
	baseGitRepo, closer, err := git.RepositoryFromContextOrOpen(ctx, pr.BaseRepo.RepoPath())
	if err != nil {
		return false, err
	}
	defer closer.Close()

	baseCommit, err := baseGitRepo.GetBranchCommit(branchName)
	if err != nil {
		return false, err
	}

	if err = pr.LoadHeadRepo(ctx); err != nil {
		return false, err
	}
	var headGitRepo *git.Repository
	if pr.HeadRepoID == pr.BaseRepoID {
		headGitRepo = baseGitRepo
	} else {
		var closer io.Closer

		headGitRepo, closer, err = git.RepositoryFromContextOrOpen(ctx, pr.HeadRepo.RepoPath())
		if err != nil {
			return false, err
		}
		defer closer.Close()
	}

	var headCommit *git.Commit
	if pr.Flow == issues_model.PullRequestFlowGithub {
		headCommit, err = headGitRepo.GetBranchCommit(pr.HeadBranch)
		if err != nil {
			return false, err
		}
	} else {
		pr.HeadCommitID, err = baseGitRepo.GetRefCommitID(pr.GetGitRefName())
		if err != nil {
			return false, err
		}
		if headCommit, err = baseGitRepo.GetCommit(pr.HeadCommitID); err != nil {
			return false, err
		}
	}
	return baseCommit.HasPreviousCommit(headCommit.ID)
}