web frontend for git (tangled's grandpa)
git: use system's git upload-pack
This is an intermediate workaround for
https://github.com/go-git/go-git/issues/1062. This should also fix #33.
+178
-70
+3
-3
config.yaml
+3
-3
config.yaml
···
12
12
templates: ./templates
13
13
static: ./static
14
14
meta:
15
-
title: git good
16
-
description: i think it's a skill issue
15
+
title: icy does git
16
+
description: come get your free software
17
17
server:
18
18
name: git.icyphox.sh
19
-
host: 127.0.0.1
19
+
host: 0.0.0.0
20
20
port: 5555
+1
-1
flake.nix
+1
-1
flake.nix
+121
git/service/service.go
+121
git/service/service.go
···
1
+
package service
2
+
3
+
import (
4
+
"bytes"
5
+
"fmt"
6
+
"io"
7
+
"log"
8
+
"net/http"
9
+
"os/exec"
10
+
"strings"
11
+
"syscall"
12
+
)
13
+
14
+
// Mostly from charmbracelet/soft-serve and sosedoff/gitkit.
15
+
16
+
type ServiceCommand struct {
17
+
Dir string
18
+
Stdin io.Reader
19
+
Stdout http.ResponseWriter
20
+
}
21
+
22
+
func (c *ServiceCommand) InfoRefs() error {
23
+
cmd := exec.Command("git", []string{
24
+
"upload-pack",
25
+
"--stateless-rpc",
26
+
"--advertise-refs",
27
+
".",
28
+
}...)
29
+
30
+
cmd.Dir = c.Dir
31
+
cmd.SysProcAttr = &syscall.SysProcAttr{Setpgid: true}
32
+
stdoutPipe, _ := cmd.StdoutPipe()
33
+
cmd.Stderr = cmd.Stdout
34
+
35
+
if err := cmd.Start(); err != nil {
36
+
log.Printf("git: failed to start git-upload-pack (info/refs): %s", err)
37
+
return err
38
+
}
39
+
40
+
if err := packLine(c.Stdout, "# service=git-upload-pack\n"); err != nil {
41
+
log.Printf("git: failed to write pack line: %s", err)
42
+
return err
43
+
}
44
+
45
+
if err := packFlush(c.Stdout); err != nil {
46
+
log.Printf("git: failed to flush pack: %s", err)
47
+
return err
48
+
}
49
+
50
+
buf := bytes.Buffer{}
51
+
if _, err := io.Copy(&buf, stdoutPipe); err != nil {
52
+
log.Printf("git: failed to copy stdout to tmp buffer: %s", err)
53
+
return err
54
+
}
55
+
56
+
if err := cmd.Wait(); err != nil {
57
+
out := strings.Builder{}
58
+
_, _ = io.Copy(&out, &buf)
59
+
log.Printf("git: failed to run git-upload-pack; err: %s; output: %s", err, out.String())
60
+
return err
61
+
}
62
+
63
+
if _, err := io.Copy(c.Stdout, &buf); err != nil {
64
+
log.Printf("git: failed to copy stdout: %s", err)
65
+
}
66
+
67
+
return nil
68
+
}
69
+
70
+
func (c *ServiceCommand) UploadPack() error {
71
+
cmd := exec.Command("git", []string{
72
+
"-c", "uploadpack.allowFilter=true",
73
+
"upload-pack",
74
+
"--stateless-rpc",
75
+
".",
76
+
}...)
77
+
cmd.Dir = c.Dir
78
+
cmd.SysProcAttr = &syscall.SysProcAttr{Setpgid: true}
79
+
80
+
stdoutPipe, _ := cmd.StdoutPipe()
81
+
cmd.Stderr = cmd.Stdout
82
+
defer stdoutPipe.Close()
83
+
84
+
stdinPipe, err := cmd.StdinPipe()
85
+
if err != nil {
86
+
return err
87
+
}
88
+
defer stdinPipe.Close()
89
+
90
+
if err := cmd.Start(); err != nil {
91
+
log.Printf("git: failed to start git-upload-pack: %s", err)
92
+
return err
93
+
}
94
+
95
+
if _, err := io.Copy(stdinPipe, c.Stdin); err != nil {
96
+
log.Printf("git: failed to copy stdin: %s", err)
97
+
return err
98
+
}
99
+
stdinPipe.Close()
100
+
101
+
if _, err := io.Copy(newWriteFlusher(c.Stdout), stdoutPipe); err != nil {
102
+
log.Printf("git: failed to copy stdout: %s", err)
103
+
return err
104
+
}
105
+
if err := cmd.Wait(); err != nil {
106
+
log.Printf("git: failed to wait for git-upload-pack: %s", err)
107
+
return err
108
+
}
109
+
110
+
return nil
111
+
}
112
+
113
+
func packLine(w io.Writer, s string) error {
114
+
_, err := fmt.Fprintf(w, "%04x%s", len(s)+4, s)
115
+
return err
116
+
}
117
+
118
+
func packFlush(w io.Writer) error {
119
+
_, err := fmt.Fprint(w, "0000")
120
+
return err
121
+
}
+25
git/service/write_flusher.go
+25
git/service/write_flusher.go
···
1
+
package service
2
+
3
+
import (
4
+
"io"
5
+
"net/http"
6
+
)
7
+
8
+
func newWriteFlusher(w http.ResponseWriter) io.Writer {
9
+
return writeFlusher{w.(interface {
10
+
io.Writer
11
+
http.Flusher
12
+
})}
13
+
}
14
+
15
+
type writeFlusher struct {
16
+
wf interface {
17
+
io.Writer
18
+
http.Flusher
19
+
}
20
+
}
21
+
22
+
func (w writeFlusher) Write(p []byte) (int, error) {
23
+
defer w.wf.Flush()
24
+
return w.wf.Write(p)
25
+
}
+28
-66
routes/git.go
+28
-66
routes/git.go
···
1
1
package routes
2
2
3
3
import (
4
-
"errors"
4
+
"compress/gzip"
5
+
"io"
5
6
"log"
6
7
"net/http"
7
8
"path/filepath"
8
9
9
-
"github.com/go-git/go-billy/v5/osfs"
10
-
"github.com/go-git/go-git/v5/plumbing/format/pktline"
11
-
"github.com/go-git/go-git/v5/plumbing/protocol/packp"
12
-
"github.com/go-git/go-git/v5/plumbing/transport"
13
-
"github.com/go-git/go-git/v5/plumbing/transport/server"
10
+
"git.icyphox.sh/legit/git/service"
14
11
)
15
12
16
13
func (d *deps) InfoRefs(w http.ResponseWriter, r *http.Request) {
···
20
17
repo := filepath.Join(d.c.Repo.ScanPath, name)
21
18
22
19
w.Header().Set("content-type", "application/x-git-upload-pack-advertisement")
20
+
w.WriteHeader(http.StatusOK)
23
21
24
-
ep, err := transport.NewEndpoint("/")
25
-
if err != nil {
26
-
http.Error(w, err.Error(), 500)
27
-
log.Printf("git: %s", err)
28
-
return
22
+
cmd := service.ServiceCommand{
23
+
Dir: repo,
24
+
Stdout: w,
29
25
}
30
26
31
-
billyfs := osfs.New(repo)
32
-
loader := server.NewFilesystemLoader(billyfs)
33
-
srv := server.NewServer(loader)
34
-
session, err := srv.NewUploadPackSession(ep, nil)
35
-
if err != nil {
27
+
if err := cmd.InfoRefs(); err != nil {
36
28
http.Error(w, err.Error(), 500)
37
-
log.Printf("git: %s", err)
38
-
return
39
-
}
40
-
41
-
ar, err := session.AdvertisedReferencesContext(r.Context())
42
-
if errors.Is(err, transport.ErrRepositoryNotFound) {
43
-
http.Error(w, err.Error(), 404)
44
-
return
45
-
} else if err != nil {
46
-
http.Error(w, err.Error(), 500)
47
-
return
48
-
}
49
-
50
-
ar.Prefix = [][]byte{
51
-
[]byte("# service=git-upload-pack"),
52
-
pktline.Flush,
53
-
}
54
-
55
-
if err = ar.Encode(w); err != nil {
56
-
http.Error(w, err.Error(), 500)
57
-
log.Printf("git: %s", err)
29
+
log.Printf("git: failed to execute git-upload-pack (info/refs) %s", err)
58
30
return
59
31
}
60
32
}
···
66
38
repo := filepath.Join(d.c.Repo.ScanPath, name)
67
39
68
40
w.Header().Set("content-type", "application/x-git-upload-pack-result")
69
-
70
-
upr := packp.NewUploadPackRequest()
71
-
err := upr.Decode(r.Body)
72
-
if err != nil {
73
-
http.Error(w, err.Error(), 400)
74
-
log.Printf("git: %s", err)
75
-
return
76
-
}
41
+
w.Header().Set("Connection", "Keep-Alive")
42
+
w.Header().Set("Transfer-Encoding", "chunked")
43
+
w.WriteHeader(http.StatusOK)
77
44
78
-
ep, err := transport.NewEndpoint("/")
79
-
if err != nil {
80
-
http.Error(w, err.Error(), 500)
81
-
log.Printf("git: %s", err)
82
-
return
45
+
cmd := service.ServiceCommand{
46
+
Dir: repo,
47
+
Stdout: w,
83
48
}
84
49
85
-
billyfs := osfs.New(repo)
86
-
loader := server.NewFilesystemLoader(billyfs)
87
-
svr := server.NewServer(loader)
88
-
session, err := svr.NewUploadPackSession(ep, nil)
89
-
if err != nil {
90
-
http.Error(w, err.Error(), 500)
91
-
log.Printf("git: %s", err)
92
-
return
93
-
}
50
+
var reader io.ReadCloser
51
+
reader = r.Body
94
52
95
-
res, err := session.UploadPack(r.Context(), upr)
96
-
if err != nil {
97
-
http.Error(w, err.Error(), 500)
98
-
log.Printf("git: %s", err)
99
-
return
53
+
if r.Header.Get("Content-Encoding") == "gzip" {
54
+
reader, err := gzip.NewReader(r.Body)
55
+
if err != nil {
56
+
http.Error(w, err.Error(), 500)
57
+
log.Printf("git: failed to create gzip reader: %s", err)
58
+
return
59
+
}
60
+
defer reader.Close()
100
61
}
101
62
102
-
if err = res.Encode(w); err != nil {
63
+
cmd.Stdin = reader
64
+
if err := cmd.UploadPack(); err != nil {
103
65
http.Error(w, err.Error(), 500)
104
-
log.Printf("git: %s", err)
66
+
log.Printf("git: failed to execute git-upload-pack %s", err)
105
67
return
106
68
}
107
69
}