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

  $ 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