1. 1
2. 2
3. 3
4. 4
5. 5
6. 6
7. 7
8. 8
9. 9
10. 10
11. 11
12. 12
13. 13
14. 14
15. 15
16. 16
17. 17
18. 18
19. 19
20. 20
21. 21
22. 22
23. 23
24. 24
25. 25
26. 26
27. 27
28. 28
29. 29
30. 30
31. 31
32. 32
33. 33
34. 34
35. 35
36. 36
37. 37
38. 38
39. 39
40. 40
41. 41
42. 42
43. 43
44. 44
45. 45
46. 46
47. 47
48. 48
49. 49
50. 50
51. 51
52. 52
53. 53
54. 54
55. 55
56. 56
57. 57
58. 58
59. 59
60. 60
61. 61
62. 62
63. 63
64. 64
65. 65
66. 66
67. 67
68. 68
69. 69
70. 70
71. 71
72. 72
73. 73
74. 74
75. 75
76. 76
77. 77
78. 78
79. 79
80. 80
81. 81
82. 82
83. 83
84. 84
85. 85
86. 86
87. 87
88. 88
89. 89
90. 90
91. 91
92. 92
93. 93
94. 94
95. 95
96. 96
97. 97
98. 98
99. 99
100. 100
101. 101
102. 102
103. 103
104. 104
105. 105
106. 106
107. 107
108. 108
109. 109
110. 110
111. 111
112. 112
113. 113
114. 114
115. 115
116. 116
117. 117
118. 118
119. 119
120. 120
121. 121
122. 122
123. 123
124. 124
125. 125
126. 126
127. 127
128. 128

// Copyright 2020 The Gitea Authors. All rights reserved.
// Use of this source code is governed by a MIT-style
// license that can be found in the LICENSE file.

package migrations

import (
	"fmt"
	"math"
	"path/filepath"
	"strings"
	"time"

	"code.gitea.io/gitea/modules/git"
	"code.gitea.io/gitea/modules/log"
	"code.gitea.io/gitea/modules/setting"

	"xorm.io/xorm"
)

func fixMergeBase(x *xorm.Engine) error {
	type Repository struct {
		ID        int64 `xorm:"pk autoincr"`
		OwnerID   int64 `xorm:"UNIQUE(s) index"`
		OwnerName string
		LowerName string `xorm:"UNIQUE(s) INDEX NOT NULL"`
		Name      string `xorm:"INDEX NOT NULL"`
	}

	type PullRequest struct {
		ID         int64 `xorm:"pk autoincr"`
		Index      int64
		HeadRepoID int64 `xorm:"INDEX"`
		BaseRepoID int64 `xorm:"INDEX"`
		HeadBranch string
		BaseBranch string
		MergeBase  string `xorm:"VARCHAR(40)"`

		HasMerged      bool   `xorm:"INDEX"`
		MergedCommitID string `xorm:"VARCHAR(40)"`
	}

	limit := setting.Database.IterateBufferSize
	if limit <= 0 {
		limit = 50
	}

	ticker := time.NewTicker(5 * time.Second)
	defer ticker.Stop()

	count, err := x.Count(new(PullRequest))
	if err != nil {
		return err
	}
	log.Info("%d Pull Request(s) to migrate ...", count)

	i := 0
	start := 0
	for {
		prs := make([]PullRequest, 0, 50)
		if err := x.Limit(limit, start).Asc("id").Find(&prs); err != nil {
			return fmt.Errorf("Find: %w", err)
		}
		if len(prs) == 0 {
			break
		}

		start += 50
		for _, pr := range prs {
			baseRepo := &Repository{ID: pr.BaseRepoID}
			has, err := x.Table("repository").Get(baseRepo)
			if err != nil {
				return fmt.Errorf("Unable to get base repo %d %w", pr.BaseRepoID, err)
			}
			if !has {
				log.Error("Missing base repo with id %d for PR ID %d", pr.BaseRepoID, pr.ID)
				continue
			}
			userPath := filepath.Join(setting.RepoRootPath, strings.ToLower(baseRepo.OwnerName))
			repoPath := filepath.Join(userPath, strings.ToLower(baseRepo.Name)+".git")

			gitRefName := fmt.Sprintf("refs/pull/%d/head", pr.Index)

			if !pr.HasMerged {
				var err error
				pr.MergeBase, _, err = git.NewCommand(git.DefaultContext, "merge-base").AddDashesAndList(pr.BaseBranch, gitRefName).RunStdString(&git.RunOpts{Dir: repoPath})
				if err != nil {
					var err2 error
					pr.MergeBase, _, err2 = git.NewCommand(git.DefaultContext, "rev-parse").AddDynamicArguments(git.BranchPrefix + pr.BaseBranch).RunStdString(&git.RunOpts{Dir: repoPath})
					if err2 != nil {
						log.Error("Unable to get merge base for PR ID %d, Index %d in %s/%s. Error: %v & %v", pr.ID, pr.Index, baseRepo.OwnerName, baseRepo.Name, err, err2)
						continue
					}
				}
			} else {
				parentsString, _, err := git.NewCommand(git.DefaultContext, "rev-list", "--parents", "-n", "1").AddDynamicArguments(pr.MergedCommitID).RunStdString(&git.RunOpts{Dir: repoPath})
				if err != nil {
					log.Error("Unable to get parents for merged PR ID %d, Index %d in %s/%s. Error: %v", pr.ID, pr.Index, baseRepo.OwnerName, baseRepo.Name, err)
					continue
				}
				parents := strings.Split(strings.TrimSpace(parentsString), " ")
				if len(parents) < 2 {
					continue
				}

				refs := append([]string{}, parents[1:]...)
				refs = append(refs, gitRefName)
				cmd := git.NewCommand(git.DefaultContext, "merge-base").AddDashesAndList(refs...)

				pr.MergeBase, _, err = cmd.RunStdString(&git.RunOpts{Dir: repoPath})
				if err != nil {
					log.Error("Unable to get merge base for merged PR ID %d, Index %d in %s/%s. Error: %v", pr.ID, pr.Index, baseRepo.OwnerName, baseRepo.Name, err)
					continue
				}
			}
			pr.MergeBase = strings.TrimSpace(pr.MergeBase)
			x.ID(pr.ID).Cols("merge_base").Update(pr)
			i++
			select {
			case <-ticker.C:
				log.Info("%d/%d (%2.0f%%) Pull Request(s) migrated in %d batches. %d PRs Remaining ...", i, count, float64(i)/float64(count)*100, int(math.Ceil(float64(i)/float64(limit))), count-int64(i))
			default:
			}
		}
	}
	log.Info("Completed migrating %d Pull Request(s) in: %d batches", count, int(math.Ceil(float64(i)/float64(limit))))
	return nil
}