view tests/test-extension-timing.t @ 45121:b6269741ed42

config: add option to control creation of empty successors during rewrite

The default for many history-rewriting commands (e.g. rebase and absorb) is
that changesets which would become empty are not created in the target branch.
This makes sense if the source branch consists of small fix-up changes. For
more advanced workflows that make heavy use of history-editing to create
curated patch series, dropping empty changesets is not as important or even
undesirable.

Some users want to keep the meta-history, e.g. to make finding comments in a
code review tool easier or to avoid that divergent bookmarks are created. For
that, obsmarkers from the (to-be) empty changeset to the changeset(s) that
already made the changes should be added. If a to-be empty changeset is pruned
without a successor, adding the obsmarkers is hard because the changeset has to
be found within the hidden part of the history.

If rebasing in TortoiseHg, it’s easy to miss the fact that the to-be empty
changeset was pruned. An empty changeset will function as a reminder that
obsmarkers should be added.

Martin von Zweigbergk mentioned another advantage. Stripping the successor will
de-obsolete the predecessor. If no (empty) successor is created, this won’t be
possible.

In the future, we may want to consider other behaviors, like e.g. creating the
empty successor, but pruning it right away. Therefore this configuration
accepts 'skip' and 'keep' instead of being a boolean configuration.

#require no-chg

Test basic extension support

  $ cat > foobar.py <<EOF
  > import os
  > from mercurial import commands, registrar
  > cmdtable = {}
  > command = registrar.command(cmdtable)
  > configtable = {}
  > configitem = registrar.configitem(configtable)
  > configitem(b'tests', b'foo', default=b"Foo")
  > def uisetup(ui):
  >     ui.debug(b"uisetup called [debug]\\n")
  >     ui.write(b"uisetup called\\n")
  >     ui.status(b"uisetup called [status]\\n")
  >     ui.flush()
  > def reposetup(ui, repo):
  >     ui.write(b"reposetup called for %s\\n" % os.path.basename(repo.root))
  >     ui.write(b"ui %s= repo.ui\\n" % (ui == repo.ui and b"=" or b"!"))
  >     ui.flush()
  > @command(b'foo', [], b'hg foo')
  > def foo(ui, *args, **kwargs):
  >     foo = ui.config(b'tests', b'foo')
  >     ui.write(foo)
  >     ui.write(b"\\n")
  > @command(b'bar', [], b'hg bar', norepo=True)
  > def bar(ui, *args, **kwargs):
  >     ui.write(b"Bar\\n")
  > EOF
  $ abspath=`pwd`/foobar.py

  $ mkdir barfoo
  $ cp foobar.py barfoo/__init__.py
  $ barfoopath=`pwd`/barfoo

  $ hg init a
  $ cd a
  $ echo foo > file
  $ hg add file
  $ hg commit -m 'add file'

  $ echo '[extensions]' >> $HGRCPATH
  $ echo "foobar = $abspath" >> $HGRCPATH

  $ filterlog () {
  >   sed -e 's!^[0-9/]* [0-9:]* ([0-9]*)>!YYYY/MM/DD HH:MM:SS (PID)>!'
  > }

Test extension setup timings

  $ hg foo --traceback --config devel.debug.extensions=yes --debug 2>&1 | filterlog
  YYYY/MM/DD HH:MM:SS (PID)> loading extensions
  YYYY/MM/DD HH:MM:SS (PID)> - processing 1 entries
  YYYY/MM/DD HH:MM:SS (PID)>   - loading extension: foobar
  YYYY/MM/DD HH:MM:SS (PID)>   > foobar extension loaded in * (glob)
  YYYY/MM/DD HH:MM:SS (PID)>     - validating extension tables: foobar
  YYYY/MM/DD HH:MM:SS (PID)>     - invoking registered callbacks: foobar
  YYYY/MM/DD HH:MM:SS (PID)>     > callbacks completed in * (glob)
  YYYY/MM/DD HH:MM:SS (PID)> > loaded 1 extensions, total time * (glob)
  YYYY/MM/DD HH:MM:SS (PID)> - loading configtable attributes
  YYYY/MM/DD HH:MM:SS (PID)> - executing uisetup hooks
  YYYY/MM/DD HH:MM:SS (PID)>   - running uisetup for foobar
  uisetup called [debug]
  uisetup called
  uisetup called [status]
  YYYY/MM/DD HH:MM:SS (PID)>   > uisetup for foobar took * (glob)
  YYYY/MM/DD HH:MM:SS (PID)> > all uisetup took * (glob)
  YYYY/MM/DD HH:MM:SS (PID)> - executing extsetup hooks
  YYYY/MM/DD HH:MM:SS (PID)>   - running extsetup for foobar
  YYYY/MM/DD HH:MM:SS (PID)>   > extsetup for foobar took * (glob)
  YYYY/MM/DD HH:MM:SS (PID)> > all extsetup took * (glob)
  YYYY/MM/DD HH:MM:SS (PID)> - executing remaining aftercallbacks
  YYYY/MM/DD HH:MM:SS (PID)> > remaining aftercallbacks completed in * (glob)
  YYYY/MM/DD HH:MM:SS (PID)> - loading extension registration objects
  YYYY/MM/DD HH:MM:SS (PID)> > extension registration object loading took * (glob)
  YYYY/MM/DD HH:MM:SS (PID)> > extension foobar take a total of * to load (glob)
  YYYY/MM/DD HH:MM:SS (PID)> extension loading complete
  YYYY/MM/DD HH:MM:SS (PID)> loading additional extensions
  YYYY/MM/DD HH:MM:SS (PID)> - processing 1 entries
  YYYY/MM/DD HH:MM:SS (PID)> > loaded 0 extensions, total time * (glob)
  YYYY/MM/DD HH:MM:SS (PID)> - loading configtable attributes
  YYYY/MM/DD HH:MM:SS (PID)> - executing uisetup hooks
  YYYY/MM/DD HH:MM:SS (PID)> > all uisetup took * (glob)
  YYYY/MM/DD HH:MM:SS (PID)> - executing extsetup hooks
  YYYY/MM/DD HH:MM:SS (PID)> > all extsetup took * (glob)
  YYYY/MM/DD HH:MM:SS (PID)> - executing remaining aftercallbacks
  YYYY/MM/DD HH:MM:SS (PID)> > remaining aftercallbacks completed in * (glob)
  YYYY/MM/DD HH:MM:SS (PID)> - loading extension registration objects
  YYYY/MM/DD HH:MM:SS (PID)> > extension registration object loading took * (glob)
  YYYY/MM/DD HH:MM:SS (PID)> extension loading complete
  YYYY/MM/DD HH:MM:SS (PID)> - executing reposetup hooks
  YYYY/MM/DD HH:MM:SS (PID)>   - running reposetup for foobar
  reposetup called for a
  ui == repo.ui
  YYYY/MM/DD HH:MM:SS (PID)>   > reposetup for foobar took * (glob)
  YYYY/MM/DD HH:MM:SS (PID)> > all reposetup took * (glob)
  Foo

  $ cd ..

  $ echo 'foobar = !' >> $HGRCPATH