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.
mock bugzilla driver for testing template output:
$ cat <<EOF > bzmock.py
> from mercurial import extensions
> from mercurial import pycompat
> from mercurial import registrar
> from mercurial.utils import stringutil
>
> configtable = {}
> configitem = registrar.configitem(configtable)
>
> configitem(b'bugzilla', b'mocklog',
> default=None,
> )
> def extsetup(ui):
> bugzilla = extensions.find(b'bugzilla')
> class bzmock(bugzilla.bzaccess):
> def __init__(self, ui):
> super(bzmock, self).__init__(ui)
> self._logfile = ui.config(b'bugzilla', b'mocklog')
> def updatebug(self, bugid, newstate, text, committer):
> with open(pycompat.fsdecode(self._logfile), 'ab') as f:
> f.write(b'update bugid=%s, newstate=%s, committer=%s\n'
> % (stringutil.pprint(bugid),
> stringutil.pprint(newstate),
> stringutil.pprint(committer)))
> f.write(b'----\n' + text + b'\n----\n')
> def notify(self, bugs, committer):
> with open(pycompat.fsdecode(self._logfile), 'ab') as f:
> f.write(b'notify bugs=%s, committer=%s\n'
> % (stringutil.pprint(bugs),
> stringutil.pprint(committer)))
> bugzilla.bugzilla._versions[b'mock'] = bzmock
> EOF
set up mock repository:
$ hg init mockremote
$ cat <<EOF > mockremote/.hg/hgrc
> [extensions]
> bugzilla =
> bzmock = $TESTTMP/bzmock.py
>
> [bugzilla]
> version = mock
> mocklog = $TESTTMP/bzmock.log
>
> [hooks]
> incoming.bugzilla = python:hgext.bugzilla.hook
>
> [web]
> baseurl=http://example.org/hg
>
> %include $TESTTMP/bzstyle.hgrc
> EOF
$ hg clone -q mockremote mocklocal
push with default template:
$ echo '[bugzilla]' > bzstyle.hgrc
$ echo foo > mocklocal/foo
$ hg ci -R mocklocal -Aqm 'Fixes bug 123'
$ hg -R mocklocal push -q
$ cat bzmock.log && rm bzmock.log
update bugid=123, newstate={}, committer='test'
----
changeset 7875a8342c6f in repo $TESTTMP/mockremote refers to bug 123.
details:
Fixes bug 123
----
notify bugs={123: {}}, committer='test'
push with style:
$ cat <<EOF > bzstyle.map
> changeset = "{node|short} refers to bug {bug}."
> EOF
$ echo "style = $TESTTMP/bzstyle.map" >> bzstyle.hgrc
$ echo foo >> mocklocal/foo
$ hg ci -R mocklocal -qm 'Fixes bug 456'
$ hg -R mocklocal push -q
$ cat bzmock.log && rm bzmock.log
update bugid=456, newstate={}, committer='test'
----
2808b172464b refers to bug 456.
----
notify bugs={456: {}}, committer='test'
push with template (overrides style):
$ cat <<EOF >> bzstyle.hgrc
> template = Changeset {node|short} in {root|basename}.
> {hgweb}/rev/{node|short}\n
> {desc}
> EOF
$ echo foo >> mocklocal/foo
$ hg ci -R mocklocal -qm 'Fixes bug 789'
$ hg -R mocklocal push -q
$ cat bzmock.log && rm bzmock.log
update bugid=789, newstate={}, committer='test'
----
Changeset a770f3e409f2 in mockremote.
http://example.org/hg/rev/a770f3e409f2
Fixes bug 789
----
notify bugs={789: {}}, committer='test'