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

package git

import (
	"fmt"

	"github.com/go-git/go-git/v5"
	"github.com/go-git/go-git/v5/plumbing"
	"github.com/go-git/go-git/v5/plumbing/object"
)

func AllCommits(r *git.Repository) ([]*object.Commit, error) {
	ci, err := r.Log(&git.LogOptions{All: true})
	if err != nil {
		return nil, fmt.Errorf("all commits: %w", err)
	}

	commits := []*object.Commit{}
	ci.ForEach(func(c *object.Commit) error {
		commits = append(commits, c)
		return nil
	})

	return commits, nil
}

// A nicer git tree representation.
type NiceTree struct {
	Name   string
	Mode   string
	Size   int64
	IsFile bool
}

func FilesAtRef(r *git.Repository, hash plumbing.Hash, path string) ([]NiceTree, error) {
	c, err := r.CommitObject(hash)
	if err != nil {
		return nil, fmt.Errorf("commit object: %w", err)
	}

	files := []NiceTree{}
	tree, err := c.Tree()
	if err != nil {
		return nil, fmt.Errorf("file tree: %w", err)
	}

	if path == "" {
		files = makeNiceTree(tree.Entries)
	} else {
		o, err := tree.FindEntry(path)
		if err != nil {
			return nil, err
		}

		if !o.Mode.IsFile() {
			subtree, err := tree.Tree(path)
			if err != nil {
				return nil, err
			}

			files = makeNiceTree(subtree.Entries)
		}
	}

	return files, nil
}

func FileContentAtRef(r *git.Repository, hash plumbing.Hash, path string) (string, error) {
	c, err := r.CommitObject(hash)
	if err != nil {
		return "", fmt.Errorf("commit object: %w", err)
	}

	tree, err := c.Tree()
	if err != nil {
		return "", fmt.Errorf("file tree: %w", err)
	}

	file, err := tree.File(path)
	if err != nil {
		return "", err
	}

	return file.Contents()
}

func makeNiceTree(es []object.TreeEntry) []NiceTree {
	nts := []NiceTree{}
	for _, e := range es {
		mode, _ := e.Mode.ToOSFileMode()
		nts = append(nts, NiceTree{
			Name:   e.Name,
			Mode:   mode.String(),
			IsFile: e.Mode.IsFile(),
		})
	}

	return nts
}