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
|
package bug
import (
"fmt"
"strings"
"github.com/MichaelMure/git-bug/entity"
"github.com/MichaelMure/git-bug/identity"
"github.com/MichaelMure/git-bug/repository"
"github.com/pkg/errors"
)
// Fetch retrieve updates from a remote
// This does not change the local bugs state
func Fetch(repo repository.Repo, remote string) (string, error) {
// "refs/bugs/*:refs/remotes/<remote>>/bugs/*"
remoteRefSpec := fmt.Sprintf(bugsRemoteRefPattern, remote)
fetchRefSpec := fmt.Sprintf("%s*:%s*", bugsRefPattern, remoteRefSpec)
return repo.FetchRefs(remote, fetchRefSpec)
}
// Push update a remote with the local changes
func Push(repo repository.Repo, remote string) (string, error) {
// "refs/bugs/*:refs/bugs/*"
refspec := fmt.Sprintf("%s*:%s*", bugsRefPattern, bugsRefPattern)
return repo.PushRefs(remote, refspec)
}
// Pull will do a Fetch + MergeAll
// This function will return an error if a merge fail
func Pull(repo repository.ClockedRepo, remote string) error {
_, err := Fetch(repo, remote)
if err != nil {
return err
}
for merge := range MergeAll(repo, remote) {
if merge.Err != nil {
return merge.Err
}
if merge.Status == entity.MergeStatusInvalid {
return errors.Errorf("merge failure: %s", merge.Reason)
}
}
return nil
}
// MergeAll will merge all the available remote bug:
//
// - If the remote has new commit, the local bug is updated to match the same history
// (fast-forward update)
// - if the local bug has new commits but the remote don't, nothing is changed
// - if both local and remote bug have new commits (that is, we have a concurrent edition),
// new local commits are rewritten at the head of the remote history (that is, a rebase)
func MergeAll(repo repository.ClockedRepo, remote string) <-chan entity.MergeResult {
out := make(chan entity.MergeResult)
// no caching for the merge, we load everything from git even if that means multiple
// copy of the same entity in memory. The cache layer will intercept the results to
// invalidate entities if necessary.
identityResolver := identity.NewSimpleResolver(repo)
go func() {
defer close(out)
remoteRefSpec := fmt.Sprintf(bugsRemoteRefPattern, remote)
remoteRefs, err := repo.ListRefs(remoteRefSpec)
if err != nil {
out <- entity.MergeResult{Err: err}
return
}
for _, remoteRef := range remoteRefs {
refSplit := strings.Split(remoteRef, "/")
id := entity.Id(refSplit[len(refSplit)-1])
if err := id.Validate(); err != nil {
out <- entity.NewMergeInvalidStatus(id, errors.Wrap(err, "invalid ref").Error())
continue
}
remoteBug, err := read(repo, identityResolver, remoteRef)
if err != nil {
out <- entity.NewMergeInvalidStatus(id, errors.Wrap(err, "remote bug is not readable").Error())
continue
}
// Check for error in remote data
if err := remoteBug.Validate(); err != nil {
out <- entity.NewMergeInvalidStatus(id, errors.Wrap(err, "remote bug is invalid").Error())
continue
}
localRef := bugsRefPattern + remoteBug.Id().String()
localExist, err := repo.RefExist(localRef)
if err != nil {
out <- entity.NewMergeError(err, id)
continue
}
// the bug is not local yet, simply create the reference
if !localExist {
err := repo.CopyRef(remoteRef, localRef)
if err != nil {
out <- entity.NewMergeError(err, id)
return
}
out <- entity.NewMergeStatus(entity.MergeStatusNew, id, remoteBug)
continue
}
localBug, err := read(repo, identityResolver, localRef)
if err != nil {
out <- entity.NewMergeError(errors.Wrap(err, "local bug is not readable"), id)
return
}
updated, err := localBug.Merge(repo, remoteBug)
if err != nil {
out <- entity.NewMergeInvalidStatus(id, errors.Wrap(err, "merge failed").Error())
return
}
if updated {
out <- entity.NewMergeStatus(entity.MergeStatusUpdated, id, localBug)
} else {
out <- entity.NewMergeStatus(entity.MergeStatusNothing, id, localBug)
}
}
}()
return out
}
|
