view tests/test-evolve-noupdate.t @ 5777:c5dfbbe4363d

evolve: when relocating, optionally first try to do it using in-memory merge

This patch adds a config option to let run evolve's relocation step
using in-memory merge. It is disabled by default. When the option is
on, the relocation is first attempted in memory. If that fails because
of merge conflicts, it retries that commit in the working copy.

There are a few reasons that I made it configurable. The most
important one is that the precommit hook won't trigger when using
in-memory merge. Another reason is that it lets us roll out the
feature slowly to our users at Google.

For now, we also update the working copy after creating the commit (in the
successful case, when there are no merge conflicts). The next patch will make it
so we don't do that update.

Because of the unnecessary working-copy update, this patch doesn't
provide any benefit on its own. Evolving 29 commits that each change
one line in the hg slows down from ~4.5s to ~4.8s when the config
option is on.

I've added `#testcases inmemory ondisk` to select `.t` files. Almost
all differences are because of the new "hit merge conflicts" message
and retrying the merge. There's also one difference in
`test-stabilize-order.t` caused by the different order of working copy
updates (we now update the working copy at the end).

Testing the `--no-update` flag to `hg evolve` command
=====================================================

There is an `--update` flag to `hg evolve` command which defaults to False. The
`--update` flag updates to the head of the evolved revisions. If you don't want
to change your working directory or update your working directory to its
successor after hg evolve, `hg evolve --no-update` is the thing for you.

This patch tests that flag.

Setup
-----

  $ cat >> $HGRCPATH <<EOF
  > [alias]
  > glog = log -GT "{rev}:{node|short} {desc}\n ({bookmarks}) {phase}"
  > [extensions]
  > EOF
  $ echo "evolve=$(echo $(dirname $TESTDIR))/hgext3rd/evolve/" >> $HGRCPATH

#testcases inmemory ondisk
#if inmemory
  $ cat >> $HGRCPATH <<EOF
  > [experimental]
  > evolution.in-memory = yes
  > EOF
#endif

  $ hg init stoprepo
  $ cd stoprepo
  $ echo ".*\.orig" > .hgignore
  $ hg add .hgignore
  $ hg ci -m "added hgignore"
  $ for ch in a b c d; do echo foo > $ch; hg add $ch; hg ci -qm "added "$ch; done;

  $ hg glog
  @  4:c41c793e0ef1 added d
  |   () draft
  o  3:ca1b80f7960a added c
  |   () draft
  o  2:b1661037fa25 added b
  |   () draft
  o  1:c7586e2a9264 added a
  |   () draft
  o  0:8fa14d15e168 added hgignore
      () draft

Making sure we stay where we were if current wdir parent was not obsoleted
--------------------------------------------------------------------------

  $ hg up .^^
  0 files updated, 0 files merged, 2 files removed, 0 files unresolved
  $ echo bar > b
  $ hg amend
  2 new orphan changesets
  $ hg glog
  @  5:7ed0642d644b added b
  |   () draft
  | *  4:c41c793e0ef1 added d
  | |   () draft
  | *  3:ca1b80f7960a added c
  | |   () draft
  | x  2:b1661037fa25 added b
  |/    () draft
  o  1:c7586e2a9264 added a
  |   () draft
  o  0:8fa14d15e168 added hgignore
      () draft

There is no 'working directory is now at' message because we didn't update
  $ hg evolve --all --no-update
  move:[3] added c
  atop:[5] added b
  move:[4] added d

  $ hg glog
  o  7:b6b20b8eefdc added d
  |   () draft
  o  6:7c46f743e62f added c
  |   () draft
  @  5:7ed0642d644b added b
  |   () draft
  o  1:c7586e2a9264 added a
  |   () draft
  o  0:8fa14d15e168 added hgignore
      () draft

Updating to successor when working directory parent is obsoleted by evolution
-----------------------------------------------------------------------------

  $ hg prev
  0 files updated, 0 files merged, 1 files removed, 0 files unresolved
  [1] added a
  $ echo bar > a
  $ hg amend
  3 new orphan changesets
  $ hg up 7ed0642d644b
  2 files updated, 0 files merged, 0 files removed, 0 files unresolved

  $ hg glog
  o  8:3d41537b44ca added a
  |   () draft
  | *  7:b6b20b8eefdc added d
  | |   () draft
  | *  6:7c46f743e62f added c
  | |   () draft
  | @  5:7ed0642d644b added b
  | |   () draft
  | x  1:c7586e2a9264 added a
  |/    () draft
  o  0:8fa14d15e168 added hgignore
      () draft

  $ hg evolve --all --any --no-update
  move:[5] added b
  atop:[8] added a
  move:[6] added c
  move:[7] added d
  working directory is now at 12c720cb3782

  $ hg glog
  o  11:a74d9f22ba3f added d
  |   () draft
  o  10:958f5155e8cd added c
  |   () draft
  @  9:12c720cb3782 added b
  |   () draft
  o  8:3d41537b44ca added a
  |   () draft
  o  0:8fa14d15e168 added hgignore
      () draft