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
|
package sources
import (
"crypto/sha256"
"errors"
"fmt"
"io"
"net/http"
"net/url"
"os"
"path/filepath"
"regexp"
"strings"
"github.com/lxc/distrobuilder/shared"
)
type alpineLinux struct {
common
}
func (s *alpineLinux) Run() error {
var releaseShort string
releaseFull := s.definition.Image.Release
if s.definition.Image.Release == "edge" {
if s.definition.Source.SameAs == "" {
return errors.New("You can't use Alpine edge without setting same_as")
}
releaseFull = s.definition.Source.SameAs
}
releaseField := strings.Split(releaseFull, ".")
if len(releaseField) == 2 {
releaseShort = fmt.Sprintf("v%s", releaseFull)
} else if len(releaseField) == 3 {
releaseShort = fmt.Sprintf("v%s.%s", releaseField[0], releaseField[1])
} else {
return fmt.Errorf("Bad Alpine release: %s", releaseFull)
}
baseURL := fmt.Sprintf("%s/%s/releases/%s", s.definition.Source.URL, releaseShort, s.definition.Image.ArchitectureMapped)
if len(releaseField) == 2 {
var err error
releaseFull, err = s.getLatestRelease(baseURL, releaseFull, s.definition.Image.ArchitectureMapped)
if err != nil {
return fmt.Errorf("Failed to find latest release: %w", err)
}
}
fname := fmt.Sprintf("alpine-minirootfs-%s-%s.tar.gz", releaseFull, s.definition.Image.ArchitectureMapped)
tarball := fmt.Sprintf("%s/%s", baseURL, fname)
url, err := url.Parse(tarball)
if err != nil {
return fmt.Errorf("Failed to parse URL %q: %w", tarball, err)
}
if !s.definition.Source.SkipVerification && url.Scheme != "https" &&
len(s.definition.Source.Keys) == 0 {
return errors.New("GPG keys are required if downloading from HTTP")
}
var fpath string
if s.definition.Source.SkipVerification {
fpath, err = s.DownloadHash(s.definition.Image, tarball, "", nil)
} else {
fpath, err = s.DownloadHash(s.definition.Image, tarball, tarball+".sha256", sha256.New())
}
if err != nil {
return fmt.Errorf("Failed to download %q: %w", tarball, err)
}
// Force gpg checks when using http
if !s.definition.Source.SkipVerification && url.Scheme != "https" {
_, err = s.DownloadHash(s.definition.Image, tarball+".asc", "", nil)
if err != nil {
return fmt.Errorf("Failed downloading %q: %w", tarball+".asc", err)
}
valid, err := s.VerifyFile(
filepath.Join(fpath, fname),
filepath.Join(fpath, fname+".asc"))
if err != nil {
return fmt.Errorf("Failed to download %q: %w", tarball+".asc", err)
}
if !valid {
return fmt.Errorf("Invalid signature for %q", filepath.Join(fpath, fname))
}
}
s.logger.WithField("file", filepath.Join(fpath, fname)).Info("Unpacking image")
// Unpack
err = shared.Unpack(filepath.Join(fpath, fname), s.rootfsDir)
if err != nil {
return fmt.Errorf("Failed to unpack %q: %w", fname, err)
}
// Handle edge builds
if s.definition.Image.Release == "edge" {
// Upgrade to edge
exitChroot, err := shared.SetupChroot(s.rootfsDir, s.definition, nil)
if err != nil {
return fmt.Errorf("Failed to set up chroot: %w", err)
}
err = shared.RunCommand(s.ctx, nil, nil, "sed", "-i", "-e", "s/v[[:digit:]]\\.[[:digit:]]\\+/edge/g", "/etc/apk/repositories")
if err != nil {
{
err := exitChroot()
if err != nil {
s.logger.WithField("err", err).Warn("Failed exiting chroot")
}
}
return fmt.Errorf("Failed to edit apk repositories: %w", err)
}
err = shared.RunCommand(s.ctx, nil, nil, "apk", "upgrade", "--update-cache", "--available")
if err != nil {
{
err := exitChroot()
if err != nil {
s.logger.WithField("err", err).Warn("Failed exiting chroot")
}
}
return fmt.Errorf("Failed to upgrade edge build: %w", err)
}
err = exitChroot()
if err != nil {
return fmt.Errorf("Failed exiting chroot: %w", err)
}
}
// Fix bad permissions in Alpine tarballs
err = os.Chmod(s.rootfsDir, 0o755)
if err != nil {
return fmt.Errorf("Failed to chmod %q: %w", s.rootfsDir, err)
}
return nil
}
func (s *alpineLinux) getLatestRelease(baseURL, release string, arch string) (string, error) {
var (
resp *http.Response
err error
)
err = shared.Retry(func() error {
resp, err = http.Get(baseURL)
if err != nil {
return fmt.Errorf("Failed to GET %q: %w", baseURL, err)
}
return nil
}, 3)
if err != nil {
return "", err
}
defer resp.Body.Close()
body, err := io.ReadAll(resp.Body)
if err != nil {
return "", fmt.Errorf("Failed to ready body: %w", err)
}
regex := regexp.MustCompile(fmt.Sprintf(">alpine-minirootfs-(%s\\.\\d+)-%s.tar.gz<", release, arch))
releases := regex.FindAllStringSubmatch(string(body), -1)
if len(releases) > 0 {
return releases[len(releases)-1][1], nil
}
return "", nil
}
|
