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
|
package remote
import (
"bytes"
"context"
"errors"
"fmt"
"github.com/grpc-ecosystem/go-grpc-middleware/logging/logrus/ctxlogrus"
"gitlab.com/gitlab-org/gitaly/internal/git"
"gitlab.com/gitlab-org/gitaly/internal/gitaly/service/ref"
"gitlab.com/gitlab-org/gitaly/internal/gitalyssh"
"gitlab.com/gitlab-org/gitaly/internal/helper"
"gitlab.com/gitlab-org/gitaly/proto/go/gitalypb"
"google.golang.org/grpc/codes"
"google.golang.org/grpc/status"
)
const (
gitalyInternalURL = "ssh://gitaly/internal.git"
mirrorRefSpec = "+refs/*:refs/*"
)
// FetchInternalRemote fetches another Gitaly repository set as a remote
func (s *server) FetchInternalRemote(ctx context.Context, req *gitalypb.FetchInternalRemoteRequest) (*gitalypb.FetchInternalRemoteResponse, error) {
if err := validateFetchInternalRemoteRequest(req); err != nil {
return nil, status.Errorf(codes.InvalidArgument, "FetchInternalRemote: %v", err)
}
env, err := gitalyssh.UploadPackEnv(ctx, &gitalypb.SSHUploadPackRequest{Repository: req.RemoteRepository})
if err != nil {
return nil, err
}
repoPath, err := s.locator.GetRepoPath(req.Repository)
if err != nil {
return nil, err
}
cmd, err := git.SafeBareCmd(ctx, git.CmdStream{}, env,
[]git.Option{git.ValueFlag{"--git-dir", repoPath}},
git.SubCmd{
Name: "fetch",
Flags: []git.Option{git.Flag{Name: "--prune"}},
Args: []string{gitalyInternalURL, mirrorRefSpec},
},
)
if err != nil {
return nil, err
}
if err := cmd.Wait(); err != nil {
// Design quirk: if the fetch fails, this RPC returns Result: false, but no error.
ctxlogrus.Extract(ctx).WithError(err).Warn("git fetch failed")
return &gitalypb.FetchInternalRemoteResponse{Result: false}, nil
}
remoteDefaultBranch, err := s.getRemoteDefaultBranch(ctx, req.RemoteRepository)
if err != nil {
return nil, status.Errorf(codes.Internal, "FetchInternalRemote: remote default branch: %v", err)
}
defaultBranch, err := ref.DefaultBranchName(ctx, req.Repository)
if err != nil {
return nil, status.Errorf(codes.Internal, "FetchInternalRemote: default branch: %v", err)
}
if !bytes.Equal(defaultBranch, remoteDefaultBranch) {
if err := ref.SetDefaultBranchRef(ctx, req.Repository, string(remoteDefaultBranch)); err != nil {
return nil, status.Errorf(codes.Internal, "FetchInternalRemote: set default branch: %v", err)
}
}
return &gitalypb.FetchInternalRemoteResponse{Result: true}, nil
}
// getRemoteDefaultBranch gets the default branch of a repository hosted on another Gitaly node
func (s *server) getRemoteDefaultBranch(ctx context.Context, repo *gitalypb.Repository) ([]byte, error) {
serverInfo, err := helper.ExtractGitalyServer(ctx, repo.StorageName)
if err != nil {
return nil, fmt.Errorf("getRemoteDefaultBranch: %w", err)
}
if serverInfo.Address == "" {
return nil, errors.New("getRemoteDefaultBranch: empty Gitaly address")
}
conn, err := s.conns.Dial(ctx, serverInfo.Address, serverInfo.Token)
if err != nil {
return nil, fmt.Errorf("getRemoteDefaultBranch: %w", err)
}
cc := gitalypb.NewRefServiceClient(conn)
response, err := cc.FindDefaultBranchName(ctx, &gitalypb.FindDefaultBranchNameRequest{
Repository: repo,
})
if err != nil {
return nil, fmt.Errorf("getRemoteDefaultBranch: %w", err)
}
return response.Name, nil
}
func validateFetchInternalRemoteRequest(req *gitalypb.FetchInternalRemoteRequest) error {
if req.GetRepository() == nil {
return fmt.Errorf("empty Repository")
}
if req.GetRemoteRepository() == nil {
return fmt.Errorf("empty Remote Repository")
}
return nil
}
|
