branchcache: skip entries that are topological heads in the on disk file
In the majority of cases, topological heads are also branch heads. We have
efficient way to get the topological heads and efficient way to retrieve
their branch information. So there is little value in putting them in the branch
cache file explicitly. On the contrary, writing them explicitly tend to create
very large cache file that are inefficient to read and update.
So the branch cache v3 format is no longer including them. This changeset focus
on the format aspect and have no focus on the performance aspect. We will cover
that later.
#testcases abortcommand abortflag
#if abortflag
$ cat >> $HGRCPATH <<EOF
> [alias]
> abort = histedit --abort
> EOF
#endif
$ . "$TESTDIR/histedit-helpers.sh"
Enable extension used by this test
$ cat >>$HGRCPATH <<EOF
> [extensions]
> histedit=
> EOF
=================================
Test backup-bundle config option|
=================================
Repo setup:
$ hg init foo
$ cd foo
$ echo first>file
$ hg ci -qAm one
$ echo second>>file
$ hg ci -m two
$ echo third>>file
$ hg ci -m three
$ echo forth>>file
$ hg ci -m four
$ hg log -G --style compact
@ 3[tip] 7d5187087c79 1970-01-01 00:00 +0000 test
| four
|
o 2 80d23dfa866d 1970-01-01 00:00 +0000 test
| three
|
o 1 6153eb23e623 1970-01-01 00:00 +0000 test
| two
|
o 0 36b4bdd91f5b 1970-01-01 00:00 +0000 test
one
Test when `backup-bundle` config option is enabled:
$ hg histedit -r '36b4bdd91f5b' --commands - << EOF
> pick 36b4bdd91f5b 0 one
> pick 6153eb23e623 1 two
> roll 80d23dfa866d 2 three
> edit 7d5187087c79 3 four
> EOF
merging file
Editing (7d5187087c79), commit as needed now to split the change
(to edit 7d5187087c79, `hg histedit --continue` after making changes)
[240]
$ hg abort
1 files updated, 0 files merged, 0 files removed, 0 files unresolved
saved backup bundle to $TESTTMP/foo/.hg/strip-backup/1d8f701c7b35-cf7be322-backup.hg
saved backup bundle to $TESTTMP/foo/.hg/strip-backup/5c0056670bce-b54b65d0-backup.hg
Test when `backup-bundle` config option is not enabled
Enable config option:
$ cat >>$HGRCPATH <<EOF
> [rewrite]
> backup-bundle = False
> EOF
$ hg histedit -r '36b4bdd91f5b' --commands - << EOF
> pick 36b4bdd91f5b 0 one
> pick 6153eb23e623 1 two
> roll 80d23dfa866d 2 three
> edit 7d5187087c79 3 four
> EOF
merging file
Editing (7d5187087c79), commit as needed now to split the change
(to edit 7d5187087c79, `hg histedit --continue` after making changes)
[240]
$ hg abort
1 files updated, 0 files merged, 0 files removed, 0 files unresolved