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
|
// Package transport includes the implementation for different transport
// protocols.
//
// `Client` can be used to fetch and send packfiles to a git server.
// The `client` package provides higher level functions to instantiate the
// appropriate `Client` based on the repository URL.
//
// go-git supports HTTP and SSH (see `Protocols`), but you can also install
// your own protocols (see the `client` package).
//
// Each protocol has its own implementation of `Client`, but you should
// generally not use them directly, use `client.NewClient` instead.
package transport
import (
"errors"
"fmt"
"io"
"net/url"
"regexp"
"gopkg.in/src-d/go-git.v4/plumbing"
"gopkg.in/src-d/go-git.v4/plumbing/protocol/packp"
"gopkg.in/src-d/go-git.v4/plumbing/protocol/packp/capability"
)
var (
ErrRepositoryNotFound = errors.New("repository not found")
ErrEmptyRemoteRepository = errors.New("remote repository is empty")
ErrAuthorizationRequired = errors.New("authorization required")
ErrEmptyUploadPackRequest = errors.New("empty git-upload-pack given")
ErrInvalidAuthMethod = errors.New("invalid auth method")
)
const (
UploadPackServiceName = "git-upload-pack"
ReceivePackServiceName = "git-receive-pack"
)
// Transport can initiate git-upload-pack and git-receive-pack processes.
// It is implemented both by the client and the server, making this a RPC.
type Transport interface {
// NewUploadPackSession starts a git-upload-pack session for an endpoint.
NewUploadPackSession(Endpoint) (UploadPackSession, error)
// NewReceivePackSession starts a git-receive-pack session for an endpoint.
NewReceivePackSession(Endpoint) (ReceivePackSession, error)
}
type Session interface {
// AdvertisedReferences retrieves the advertised references for a
// repository.
// If the repository does not exist, returns ErrRepositoryNotFound.
// If the repository exists, but is empty, returns ErrEmptyRemoteRepository.
AdvertisedReferences() (*packp.AdvRefs, error)
//TODO: Move to Client level.
SetAuth(auth AuthMethod) error
io.Closer
}
type AuthMethod interface {
fmt.Stringer
Name() string
}
// UploadPackSession represents a git-upload-pack session.
// A git-upload-pack session has two steps: reference discovery
// (AdvertisedReferences) and uploading pack (UploadPack).
type UploadPackSession interface {
Session
// UploadPack takes a git-upload-pack request and returns a response,
// including a packfile. Don't be confused by terminology, the client
// side of a git-upload-pack is called git-fetch-pack, although here
// the same interface is used to make it RPC-like.
UploadPack(*packp.UploadPackRequest) (*packp.UploadPackResponse, error)
}
// ReceivePackSession represents a git-receive-pack session.
// A git-receive-pack session has two steps: reference discovery
// (AdvertisedReferences) and receiving pack (ReceivePack).
// In that order.
type ReceivePackSession interface {
Session
// ReceivePack sends an update references request and a packfile
// reader and returns a ReportStatus and error. Don't be confused by
// terminology, the client side of a git-receive-pack is called
// git-send-pack, although here the same interface is used to make it
// RPC-like.
ReceivePack(*packp.ReferenceUpdateRequest) (*packp.ReportStatus, error)
}
type Endpoint url.URL
var (
isSchemeRegExp = regexp.MustCompile("^[^:]+://")
scpLikeUrlRegExp = regexp.MustCompile("^(?P<user>[^@]+@)?(?P<host>[^:]+):/?(?P<path>.+)$")
)
func NewEndpoint(endpoint string) (Endpoint, error) {
endpoint = transformSCPLikeIfNeeded(endpoint)
u, err := url.Parse(endpoint)
if err != nil {
return Endpoint{}, plumbing.NewPermanentError(err)
}
if !u.IsAbs() {
return Endpoint{}, plumbing.NewPermanentError(fmt.Errorf(
"invalid endpoint: %s", endpoint,
))
}
return Endpoint(*u), nil
}
func (e *Endpoint) String() string {
u := url.URL(*e)
return u.String()
}
func transformSCPLikeIfNeeded(endpoint string) string {
if !isSchemeRegExp.MatchString(endpoint) && scpLikeUrlRegExp.MatchString(endpoint) {
m := scpLikeUrlRegExp.FindStringSubmatch(endpoint)
return fmt.Sprintf("ssh://%s%s/%s", m[1], m[2], m[3])
}
return endpoint
}
// UnsupportedCapabilities are the capabilities not supported by any client
// implementation
var UnsupportedCapabilities = []capability.Capability{
capability.MultiACK,
capability.MultiACKDetailed,
capability.ThinPack,
}
// FilterUnsupportedCapabilities it filter out all the UnsupportedCapabilities
// from a capability.List, the intended usage is on the client implementation
// to filter the capabilities from an AdvRefs message.
func FilterUnsupportedCapabilities(list *capability.List) {
for _, c := range UnsupportedCapabilities {
list.Delete(c)
}
}
|
