func retrieveRemoteRevisions(r *ftl.RemoteRepository, packageName string) (curRev, prevRev *ftl.RevisionInfo, revisions []*ftl.RevisionInfo, err error) {
crChan := make(chan ftl.RevisionListResult)
go func() {
currentRev, err := r.GetCurrentRevision(packageName)
crChan <- ftl.RevisionListResult{[]*ftl.RevisionInfo{currentRev}, err}
}()
prChan := make(chan ftl.RevisionListResult)
go func() {
previousRev, err := r.GetPreviousRevision(packageName)
prChan <- ftl.RevisionListResult{[]*ftl.RevisionInfo{previousRev}, err}
}()
rrChan := make(chan ftl.RevisionListResult)
go func() {
remoteRevisions, err := r.ListRevisions(packageName)
rrChan <- ftl.RevisionListResult{remoteRevisions, err}
}()
crResult := <-crChan
if crResult.Err != nil {
err = fmt.Errorf("Failed to retrieve current revision")
} else {
curRev = crResult.Revisions[0]
}
prResult := <-prChan
if prResult.Err != nil {
err = fmt.Errorf("Failed to retrieve previous revision")
} else {
prevRev = prResult.Revisions[0]
}
rrResult := <-rrChan
if rrResult.Err != nil {
err = fmt.Errorf("Failed to retrieve remote revisions")
} else {
revisions = rrResult.Revisions
}
return
}
