// UnmarshalDeltaSpec marshals a map containing route variables
// generated by (*DeltaSpec).RouteVars() and returns the
// equivalent DeltaSpec struct.
func UnmarshalDeltaSpec(routeVars map[string]string) (DeltaSpec, error) {
s := DeltaSpec{}
rr, err := UnmarshalRepoRevSpec(routeVars)
if err != nil {
return DeltaSpec{}, err
}
s.Base = rr
dhr := routeVars["DeltaHeadResolvedRev"]
if i := strings.Index(dhr, ":"); i != -1 {
// base repo != head repo
repoPCB64, revPC := dhr[:i], dhr[i+1:]
repoPC, err := base64.URLEncoding.DecodeString(repoPCB64)
if err != nil {
return DeltaSpec{}, err
}
rev, commitID, err := spec.ParseResolvedRev(revPC)
if err != nil {
return DeltaSpec{}, err
}
s.Head = RepoRevSpec{RepoSpec: RepoSpec{URI: string(repoPC)}, Rev: rev, CommitID: commitID}
} else {
rev, commitID, err := spec.ParseResolvedRev(dhr)
if err != nil {
return DeltaSpec{}, err
}
s.Head = RepoRevSpec{RepoSpec: rr.RepoSpec, Rev: rev, CommitID: commitID}
}
return s, nil
}
// FixResolvedRevVars is a mux.PostMatchFunc that cleans and
// normalizes the route vars pertaining to a ResolvedRev (Rev and CommitID).
func FixResolvedRevVars(req *http.Request, match *mux.RouteMatch, r *mux.Route) {
if rrev, present := match.Vars["ResolvedRev"]; present {
rev, commitID, err := spec.ParseResolvedRev(rrev)
if err == nil || rrev == "" {
// Propagate ResolvedRev if it was set and if parsing
// failed; otherwise remove it.
delete(match.Vars, "ResolvedRev")
}
if err == nil {
if rev != "" {
match.Vars["Rev"] = rev
}
if commitID != "" {
match.Vars["CommitID"] = commitID
}
}
}
}