func (ra *repoAccess) localChangesetId(rs revlog.RevisionSpec) (chgId revlog.FileRevSpec, err error) {
r, err := ra.clRec(rs)
if err == nil {
chgId = revlog.FileRevSpec(r.FileRev())
}
return
}
func (m *Manifests) LookupRevision(linkrev int, wantId revlog.NodeId) (r *revlog.Rec, err error) {
r, err = revlog.FileRevSpec(linkrev).Lookup(m.Index)
if err != nil {
r = m.Tip()
err = nil
}
for int(r.Linkrev) > linkrev {
r = r.Prev()
}
if !wantId.Eq(r.Id()) {
err = errors.New("manifest node id does not match changelog entry")
}
return
}
func (r *Repository) FileSystem(at vcs.CommitID) (vfs.FileSystem, error) {
rec, err := r.getRec(at)
if err != nil {
return nil, err
}
return &hgFSNative{
dir: r.Dir,
at: hg_revlog.FileRevSpec(rec.FileRev()),
repo: r.u,
st: r.st,
cl: r.cl,
fb: hg_revlog.NewFileBuilder(),
}, nil
}
func runRevlog(cmd *Command, w io.Writer, args []string) {
if len(args) == 0 {
fatalf("missing argument: revlog index file")
}
index, err := revlog.Open(storeName(args[0]))
if err != nil {
fatalf("%s", err)
}
if *revlogR == -1 {
index.Dump(w)
return
}
r, err := revlog.FileRevSpec(*revlogR).Lookup(index)
if err != nil {
fatalf("%s", err)
}
if !*revlogBuild {
dh := &dataHelper{}
d, err := r.GetData(dh)
if dh.file != nil {
dh.file.Close()
}
if err != nil {
fatalf("%s", err)
}
if r.IsBase() {
w.Write(d)
} else {
hunks, err := patch.Parse(d)
if err != nil {
fatalf("%s", err)
}
for _, h := range hunks {
h.Dump(w)
}
}
} else {
fb := revlog.NewFileBuilder()
err = fb.BuildWrite(w, r)
if err != nil {
fatalf("%s", err)
}
}
}
func (ra *repoAccess) manifestEntry(chgId int, fileName string) (me *store.ManifestEnt, err error) {
r, err := ra.clRec(revlog.FileRevSpec(chgId))
if err != nil {
return
}
c, err := changelog.BuildEntry(r, ra.fb)
if err != nil {
return
}
m, err := getManifest(int(c.Linkrev), c.ManifestNode, ra.fb)
if err != nil {
return
}
me = m.Map()[fileName]
if me == nil {
err = errors.New("file does not exist in given revision")
}
return
}
func (r *Repository) parseRevisionSpec(s string) hg_revlog.RevisionSpec {
if s == "" {
s = "tip"
// TODO(sqs): determine per-repository default branch name (not always "default"?)
}
if s == "tip" {
return hg_revlog.TipRevSpec{}
}
if s == "null" {
return hg_revlog.NullRevSpec{}
}
if id, ok := r.allTags.IdByName[s]; ok {
s = id
} else if i, err := strconv.Atoi(s); err == nil {
return hg_revlog.FileRevSpec(i)
}
return hg_revlog.NodeIdRevSpec(s)
}
func parseRevisionSpec(s, dflt string) revlog.RevisionSpec {
if s == "" {
s = dflt
}
if s == "tip" {
return revlog.TipRevSpec{}
}
if s == "null" {
return revlog.NullRevSpec{}
}
if id, ok := allTags.IdByName[s]; ok {
s = id
} else if id, ok := branchHeads.IdByName[s]; ok {
s = id
} else if i, err := strconv.Atoi(s); err == nil {
return revlog.FileRevSpec(i)
}
return revlog.NodeIdRevSpec(s)
}
func runCat(cmd *Command, w io.Writer, args []string) {
openRepository(args)
rs := getRevisionSpec()
fileArg := getFileArg(args)
st := repo.NewStore()
fileLog, err := st.OpenRevlog(fileArg)
if err != nil {
fatalf("%s", err)
}
ra := repoAccess{
fb: revlog.NewFileBuilder(),
st: st,
}
localId, ok := rs.(revlog.FileRevSpec)
if !ok {
localId, err = ra.localChangesetId(rs)
if err != nil {
return
}
}
link := revlog.NewLinkRevSpec(int(localId))
link.FindPresent = func(rlist []*revlog.Rec) (index int, err error) {
if len(rlist) > 1 {
// Does link.Rev refer to a changelog revision that is a
// descendant of one of the revisions in rlist?
for i, r := range rlist {
cr, err1 := ra.clRec(revlog.FileRevSpec(r.Linkrev))
if err1 != nil {
err = err1
return
}
if cr.IsDescendant(link.Rev) {
index = i
goto found
}
}
err = fmt.Errorf("internal error: none of the given records is an ancestor of rev %v", link.Rev)
return
found:
if !rlist[index].IsLeaf() {
return
}
}
// Check for the file's existence using the manifest.
ent, err := ra.manifestEntry(link.Rev, fileArg)
if err == nil {
index, err = findPresentByNodeId(ent, rlist)
}
return
}
r, err := link.Lookup(fileLog)
if err != nil {
fatalf("%s", err)
}
fb := revlog.NewFileBuilder()
err = fb.BuildWrite(w, r)
if err != nil {
fatalf("%s", err)
}
}
