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|
package bug
import (
"fmt"
"strings"
"github.com/MichaelMure/git-bug/repository"
)
// Fetch retrieve update from a remote
// This does not change the local bugs state
func Fetch(repo repository.Repo, remote string) (string, error) {
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) {
return repo.PushRefs(remote, bugsRefPattern+"*")
}
// Pull will do a Fetch + MergeAll
// This function won't give details on the underlying process. If you need more
// use Fetch and MergeAll separately.
func Pull(repo repository.Repo, 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
}
}
return nil
}
// MergeAll will merge all the available remote bug
func MergeAll(repo repository.Repo, remote string) <-chan MergeResult {
out := make(chan MergeResult)
go func() {
defer close(out)
remoteRefSpec := fmt.Sprintf(bugsRemoteRefPattern, remote)
remoteRefs, err := repo.ListRefs(remoteRefSpec)
if err != nil {
out <- MergeResult{Err: err}
return
}
for _, remoteRef := range remoteRefs {
refSplitted := strings.Split(remoteRef, "/")
id := refSplitted[len(refSplitted)-1]
remoteBug, err := readBug(repo, remoteRef)
if err != nil {
out <- newMergeError(err, id)
continue
}
// Check for error in remote data
if !remoteBug.IsValid() {
out <- newMergeStatus(MergeStatusInvalid, id, nil)
continue
}
localRef := bugsRefPattern + remoteBug.Id()
localExist, err := repo.RefExist(localRef)
if err != nil {
out <- 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 <- newMergeError(err, id)
return
}
out <- newMergeStatus(MergeStatusNew, id, remoteBug)
continue
}
localBug, err := readBug(repo, localRef)
if err != nil {
out <- newMergeError(err, id)
return
}
updated, err := localBug.Merge(repo, remoteBug)
if err != nil {
out <- newMergeError(err, id)
return
}
if updated {
out <- newMergeStatus(MergeStatusUpdated, id, localBug)
} else {
out <- newMergeStatus(MergeStatusNothing, id, localBug)
}
}
}()
return out
}
// MergeStatus represent the result of a merge operation of a bug
type MergeStatus int
const (
_ MergeStatus = iota
MergeStatusNew
MergeStatusInvalid
MergeStatusUpdated
MergeStatusNothing
)
func (ms MergeStatus) String() string {
switch ms {
case MergeStatusNew:
return "new"
case MergeStatusInvalid:
return "invalid data"
case MergeStatusUpdated:
return "updated"
case MergeStatusNothing:
return "nothing to do"
default:
panic("unknown merge status")
}
}
type MergeResult struct {
// Err is set when a terminal error occur in the process
Err error
Id string
Status MergeStatus
Bug *Bug
}
func newMergeError(err error, id string) MergeResult {
return MergeResult{
Err: err,
Id: id,
}
}
func newMergeStatus(status MergeStatus, id string, bug *Bug) MergeResult {
return MergeResult{
Id: id,
Status: status,
// Bug is not set for an invalid merge result
Bug: bug,
}
}
|
