branchcache: add a "pure topological head" fast path
In a narrow but actually quick common case, all topological heads are all on
the same branch and all open. In this case, computing the branch map is very
simple. We can quickly detect situation where this situation will not change.
So we update the V3 format to be able to express this situation and upgrade the
update code to detect we remains in that mode.
The branch cache is populated with the actual value when the branch map is
accessed, but the update_disk method can do the update without needing to
populate it.
$ cat << EOF >> $HGRCPATH
> [extensions]
> rebase=
> EOF
==================================
Test backup-bundle config option |
==================================
Test with Pre-obsmarker rebase:
1) When config option is not set:
$ hg init repo1
$ cd repo1
$ echo a>a
$ hg ci -qAma
$ echo b>b
$ hg ci -qAmb
$ echo c>c
$ hg ci -qAmc
$ hg up 0 -q
$ echo d>d
$ hg ci -qAmd
$ echo e>e
$ hg ci -qAme
$ hg log -GT "{rev}: {firstline(desc)}\n"
@ 4: e
|
o 3: d
|
| o 2: c
| |
| o 1: b
|/
o 0: a
$ hg rebase -s 1 -d .
rebasing 1:d2ae7f538514 "b"
rebasing 2:177f92b77385 "c"
saved backup bundle to $TESTTMP/repo1/.hg/strip-backup/d2ae7f538514-c7ed7a78-rebase.hg
$ hg log -GT "{rev}: {firstline(desc)}\n"
o 4: c
|
o 3: b
|
@ 2: e
|
o 1: d
|
o 0: a
2) When config option is set:
$ cat << EOF >> $HGRCPATH
> [rewrite]
> backup-bundle = False
> EOF
$ echo f>f
$ hg ci -Aqmf
$ echo g>g
$ hg ci -Aqmg
$ hg log -GT "{rev}: {firstline(desc)}\n"
@ 6: g
|
o 5: f
|
| o 4: c
| |
| o 3: b
|/
o 2: e
|
o 1: d
|
o 0: a
$ hg rebase -s 3 -d .
rebasing 3:05bff2a95b12 "b"
rebasing 4:1762bde4404d "c"
$ hg log -GT "{rev}: {firstline(desc)}\n"
o 6: c
|
o 5: b
|
@ 4: g
|
o 3: f
|
o 2: e
|
o 1: d
|
o 0: a
Test when rebased revisions are stripped during abort:
======================================================
$ echo conflict > c
$ hg ci -Am "conflict with c"
adding c
created new head
$ hg log -GT "{rev}: {firstline(desc)}\n"
@ 7: conflict with c
|
| o 6: c
| |
| o 5: b
|/
o 4: g
|
o 3: f
|
o 2: e
|
o 1: d
|
o 0: a
When backup-bundle = True:
$ cat << EOF >> $HGRCPATH
> [rewrite]
> backup-bundle = True
> EOF
$ hg rebase -s 5 -d .
rebasing 5:1f8148a544ee "b"
rebasing 6:f8bc7d28e573 "c"
merging c
warning: conflicts while merging c! (edit, then use 'hg resolve --mark')
unresolved conflicts (see 'hg resolve', then 'hg rebase --continue')
[240]
$ hg rebase --abort
saved backup bundle to $TESTTMP/repo1/.hg/strip-backup/818c1a43c916-2b644d96-backup.hg
rebase aborted
When backup-bundle = False:
$ cat << EOF >> $HGRCPATH
> [rewrite]
> backup-bundle = False
> EOF
$ hg rebase -s 5 -d .
rebasing 5:1f8148a544ee "b"
rebasing 6:f8bc7d28e573 "c"
merging c
warning: conflicts while merging c! (edit, then use 'hg resolve --mark')
unresolved conflicts (see 'hg resolve', then 'hg rebase --continue')
[240]
$ hg rebase --abort
rebase aborted
$ cd ..