revlog: fix revlogio.packentry corner case
We want to store version information about the revlog in the first
entry of its index. The code in packentry was using some heuristics
to detect whether this was the first entry, but these heuristics could
fail in some cases (e.g. rev 0 was empty; rev 1 descends directly from
the nullid and is stored as a delta).
We now give the revision number to packentry to avoid heuristics.
marked working directory as branch foo
% clone repo#foo
requesting all changes
adding changesets
adding manifests
adding file changes
added 2 changesets with 2 changes to 1 files
1 files updated, 0 files merged, 0 files removed, 0 files unresolved
% heads
changeset: 1:cd2a86ecc814
branch: foo
tag: tip
user: test
date: Thu Jan 01 00:00:00 1970 +0000
summary: change a
% parents
changeset: 1:cd2a86ecc814
branch: foo
tag: tip
user: test
date: Thu Jan 01 00:00:00 1970 +0000
summary: change a
[paths]
default = #foo
% changing original repo
changeset: 3:4cd725637392
tag: tip
parent: 0:1f0dee641bb7
user: test
date: Thu Jan 01 00:00:00 1970 +0000
summary: add bar
changeset: 2:faba9097cad4
branch: foo
user: test
date: Thu Jan 01 00:00:00 1970 +0000
summary: new head of branch foo
changeset: 1:cd2a86ecc814
branch: foo
user: test
date: Thu Jan 01 00:00:00 1970 +0000
summary: change a
changeset: 0:1f0dee641bb7
user: test
date: Thu Jan 01 00:00:00 1970 +0000
summary: add a
% outgoing
2:faba9097cad4
% push
changeset: 2:faba9097cad4
branch: foo
tag: tip
user: test
date: Thu Jan 01 00:00:00 1970 +0000
summary: new head of branch foo
% rolling back
rolling back last transaction
% incoming
2:faba9097cad4
% pull
changeset: 2:faba9097cad4
branch: foo
tag: tip
user: test
date: Thu Jan 01 00:00:00 1970 +0000
summary: new head of branch foo
% pull should not have updated
1:cd2a86ecc814
% going back to the default branch
1 files updated, 0 files merged, 0 files removed, 0 files unresolved
changeset: 0:1f0dee641bb7
user: test
date: Thu Jan 01 00:00:00 1970 +0000
summary: add a
% no new revs, no update
0:1f0dee641bb7
% rollback
rolling back last transaction
1 files updated, 0 files merged, 0 files removed, 0 files unresolved
0:1f0dee641bb7
% pull -u takes us back to branch foo
changeset: 2:faba9097cad4
branch: foo
tag: tip
user: test
date: Thu Jan 01 00:00:00 1970 +0000
summary: new head of branch foo
% rollback
rolling back last transaction
1 files updated, 0 files merged, 0 files removed, 0 files unresolved
% parents
0:1f0dee641bb7
% heads
1:cd2a86ecc814
% pull -u -r otherrev url#rev updates to rev
% parents
changeset: 2:faba9097cad4
branch: foo
user: test
date: Thu Jan 01 00:00:00 1970 +0000
summary: new head of branch foo
% heads
changeset: 3:4cd725637392
tag: tip
parent: 0:1f0dee641bb7
user: test
date: Thu Jan 01 00:00:00 1970 +0000
summary: add bar
changeset: 2:faba9097cad4
branch: foo
user: test
date: Thu Jan 01 00:00:00 1970 +0000
summary: new head of branch foo