Mercurial > hg
changeset 39154:e0da43e2f71f
revlog: compute snapshot depth on delta info
We need the information to be available when choosing delta.
| author | Boris Feld <boris.feld@octobus.net> |
|---|---|
| date | Fri, 20 Jul 2018 14:32:56 +0200 |
| parents | 9d6fab487c13 |
| children | a43ef77cab1d |
| files | mercurial/revlog.py |
| diffstat | 1 files changed, 15 insertions(+), 1 deletions(-) [+] |
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--- a/mercurial/revlog.py Wed Aug 15 12:30:30 2018 +0200 +++ b/mercurial/revlog.py Fri Jul 20 14:32:56 2018 +0200 @@ -606,6 +606,7 @@ chainbase = attr.ib() chainlen = attr.ib() compresseddeltalen = attr.ib() + snapshotdepth = attr.ib() class _deltacomputer(object): def __init__(self, revlog): @@ -736,8 +737,21 @@ chainlen, compresseddeltalen = revlog._chaininfo(base) chainlen += 1 compresseddeltalen += deltalen + + revlog = self.revlog + snapshotdepth = None + if deltabase == nullrev: + snapshotdepth = 0 + elif revlog._sparserevlog and revlog.issnapshot(deltabase): + # A delta chain should always be one full snapshot, + # zero or more semi-snapshots, and zero or more deltas + p1, p2 = revlog.rev(revinfo.p1), revlog.rev(revinfo.p2) + if deltabase not in (p1, p2) and revlog.issnapshot(deltabase): + snapshotdepth = len(revlog._deltachain(deltabase)[0]) + return _deltainfo(dist, deltalen, (header, data), deltabase, - chainbase, chainlen, compresseddeltalen) + chainbase, chainlen, compresseddeltalen, + snapshotdepth) def finddeltainfo(self, revinfo, fh): """Find an acceptable delta against a candidate revision