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
|
package github
import (
"fmt"
"io"
"net/http"
"os"
"path"
"path/filepath"
"regexp"
"time"
"git.server.ky/slackcoder/mirror/internal"
)
type Client struct {
*jsonClient
}
func NewClient() *Client {
jsonClient := newJSONClient(http.DefaultClient, "https://api.github.com")
return &Client{
jsonClient: jsonClient,
}
}
type Asset struct {
Name string `json:"name"`
BrowserDownloadURL string `json:"browser_download_url"`
}
type Release struct {
ID int `json:"id"`
TagName string `json:"tag_name"`
PublishedAt time.Time `json:"published_at"`
TarballURL string `json:"tarball_url"`
ZipballURL string `json:"zipball_url"`
Assets []Asset `json:"assets"`
}
func intRef(v int) *int {
return &v
}
func (c *Client) ListReleases(owner string, project string) ([]Release, error) {
var resp []Release
_, err := c.jsonClient.Request(http.MethodGet, intRef(http.StatusOK), path.Join("repos", owner, project, "releases"), nil, &resp)
if err != nil {
return nil, err
}
return resp, nil
}
func (c *Client) DownloadAsset(w io.Writer, owner string, project string, asset *Asset) error {
resp, err := http.Get(asset.BrowserDownloadURL)
if err != nil {
return err
}
_, err = io.Copy(w, resp.Body)
if err != nil {
return err
}
return nil
}
func (c *Client) DownloadRelease(
dirPath string,
org string,
project string,
release *Release,
) error {
for _, asset := range release.Assets {
fp := path.Join(dirPath, path.Base(asset.Name))
f, err := os.Create(fp)
if err != nil {
return err
}
defer f.Close()
resp, err := http.Get(asset.BrowserDownloadURL)
if err != nil {
return err
}
_, err = io.Copy(f, resp.Body)
if err != nil {
return err
}
}
fp := path.Join(dirPath, releaseSourceFileName(project, release.TagName, "tar.gz"))
if exist, err := isFileExist(fp); err != nil {
return fmt.Errorf("downloading tarball: %w", err)
} else if !exist {
f, err := os.Create(fp)
if err != nil {
return err
}
defer f.Close()
resp, err := http.Get(release.TarballURL)
if err != nil {
return err
}
_, err = io.Copy(f, resp.Body)
if err != nil {
return err
}
}
fp = path.Join(dirPath, releaseSourceFileName(project, release.TagName, "zip"))
if exist, err := isFileExist(fp); err != nil {
return err
} else if !exist {
f, err := os.Create(fp)
if err != nil {
return fmt.Errorf("downloading zipball: %w", err)
}
defer f.Close()
resp, err := http.Get(release.ZipballURL)
if err != nil {
return err
}
_, err = io.Copy(f, resp.Body)
if err != nil {
return err
}
}
return nil
}
func releaseDownloads(
project string,
release *Release,
) map[string]string {
files := make(map[string]string)
for _, asset := range release.Assets {
files[path.Base(asset.Name)] = asset.BrowserDownloadURL
}
fileName := releaseSourceFileName(project, release.TagName, "tar.gz")
files[fileName] = release.TarballURL
fileName = releaseSourceFileName(project, release.TagName, "zip")
files[fileName] = release.ZipballURL
return files
}
func (c *Client) download(dst string, src string) error {
resp, err := http.Head(src)
if err != nil {
return err
}
info, err := os.Stat(dst)
if !os.IsNotExist(err) && err != nil {
return err
}
if info != nil {
if info.Size() == resp.ContentLength {
return nil
}
err := os.Remove(dst)
if !os.IsNotExist(err) && err != nil {
return fmt.Errorf("could not remove '%s': %w", dst, err)
}
}
resp, err = http.Get(src)
if err != nil {
return err
}
f, err := os.Create(dst)
if err != nil {
return fmt.Errorf("creating '%s': %w", dst, err)
}
defer f.Close()
_, err = io.Copy(f, resp.Body)
if err != nil {
return err
}
return nil
}
func (c *Client) MirrorAssets(dst *internal.URL, src *internal.URL) error {
if src.Hostname() != "github.com" {
return fmt.Errorf("host must be github.com")
}
if dst.Scheme != "file:///" && dst.Scheme != "" {
return fmt.Errorf("unsupported destination scheme '%s'", dst.Scheme)
}
matches := regexp.MustCompilePOSIX("/(.*?)/(.*?)").FindAllStringSubmatch(src.Path, 1)
if len(matches) != 1 && len(matches[0]) != 2 {
return fmt.Errorf("must be a full path to the project")
}
owner := matches[0][1]
project := matches[0][2]
releases, err := c.ListReleases(owner, project)
if err != nil {
return fmt.Errorf("fetching list of releases: %w", err)
}
existingFiles := make(map[string]bool)
filepath.WalkDir(dst.Path, func(path string, _ os.DirEntry, err error) error {
if err != nil {
return err
}
path, err = filepath.Abs(path)
if err != nil {
return err
}
existingFiles[path] = true
return nil
})
delete(existingFiles, dst.Path)
for _, release := range releases {
localDir := localReleaseFilePath(dst, release.TagName)
localDir, err = filepath.Abs(localDir)
if err != nil {
return err
}
err := os.MkdirAll(localDir, 0777)
if err != nil {
return fmt.Errorf("creating '%s': %w", localDir, err)
}
delete(existingFiles, localDir)
for fileName, srcURL := range releaseDownloads(project, &release) {
localFile := path.Join(localDir, fileName)
delete(existingFiles, localFile)
err := c.download(localFile, srcURL)
if err != nil {
return fmt.Errorf("downloading '%s': %w", srcURL, err)
}
}
}
for fp := range existingFiles {
_ = os.RemoveAll(fp)
}
return nil
}
|
