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
|
package main
import (
"fmt"
"io"
"io/fs"
"os"
"path/filepath"
"strconv"
"gopkg.in/yaml.v2"
"github.com/lxc/incus/v6/shared/api"
"github.com/lxc/incus/v6/shared/util"
)
func templatesApply(path string) ([]string, error) {
metaName := filepath.Join(path, "metadata.yaml")
if !util.PathExists(metaName) {
return nil, nil
}
// Parse the metadata.
content, err := os.ReadFile(metaName)
if err != nil {
return nil, fmt.Errorf("Failed to read metadata: %w", err)
}
metadata := new(api.ImageMetadata)
err = yaml.Unmarshal(content, &metadata)
if err != nil {
return nil, fmt.Errorf("Could not parse metadata.yaml: %w", err)
}
// Go through the files and copy them into place.
files := []string{}
for tplPath, tpl := range metadata.Templates {
err = func(tplPath string, tpl *api.ImageMetadataTemplate) error {
filePath := filepath.Join(path, fmt.Sprintf("%s.out", tpl.Template))
if !util.PathExists(filePath) {
return nil
}
var w *os.File
if util.PathExists(tplPath) {
if tpl.CreateOnly {
return nil
}
// Open the existing file.
w, err = os.Create(tplPath)
if err != nil {
return fmt.Errorf("Failed to create template file: %w", err)
}
} else {
// UID and GID
fileUID := int64(0)
fileGID := int64(0)
if tpl.UID != "" {
id, err := strconv.ParseInt(tpl.UID, 10, 64)
if err != nil {
return fmt.Errorf("Bad file UID %q for %q: %w", tpl.UID, tplPath, err)
}
fileUID = id
}
if tpl.GID != "" {
id, err := strconv.ParseInt(tpl.GID, 10, 64)
if err != nil {
return fmt.Errorf("Bad file GID %q for %q: %w", tpl.GID, tplPath, err)
}
fileGID = id
}
// Mode
fileMode := fs.FileMode(0o644)
if tpl.Mode != "" {
if len(tpl.Mode) == 3 {
tpl.Mode = fmt.Sprintf("0%s", tpl.Mode)
}
mode, err := strconv.ParseInt(tpl.Mode, 0, 0)
if err != nil {
return fmt.Errorf("Bad mode %q for %q: %w", tpl.Mode, tplPath, err)
}
fileMode = os.FileMode(mode) & os.ModePerm
}
// Create the directories leading to the file.
err := os.MkdirAll(filepath.Dir(tplPath), 0o755)
if err != nil {
return err
}
// Create the file itself.
w, err = os.Create(tplPath)
if err != nil {
return err
}
// Fix ownership.
err = w.Chown(int(fileUID), int(fileGID))
if err != nil {
return err
}
// Fix mode.
err = w.Chmod(fileMode)
if err != nil {
return err
}
}
defer func() { _ = w.Close() }()
// Do the copy.
src, err := os.Open(filePath)
if err != nil {
return err
}
defer func() { _ = src.Close() }()
_, err = io.Copy(w, src)
if err != nil {
return err
}
err = w.Close()
if err != nil {
return err
}
files = append(files, tplPath)
return nil
}(tplPath, tpl)
if err != nil {
return nil, err
}
}
return files, nil
}
|
