$ . "$TESTDIR/testlib/topic_setup.sh"

  $ cat << EOF >> $HGRCPATH

  > [experimental]

  > evolution = all

  > topic.publish-bare-branch = yes

  > topic.server-gate-topic-changesets = yes

  > 

  > [extensions]

  > evolve =

  > 

  > [phases]

  > publish = no

  > 

  > [ui]

  > ssh = "$PYTHON" "$RUNTESTDIR/dummyssh"

  > EOF

  $ hg init server

  $ cd server

  $ echo a > a

  $ hg commit -qAm root

  $ hg phase --public -r 'all()'

  $ cd ..

  $ hg clone ssh://user@dummy/server client-topic1

  requesting all changes

  adding changesets

  adding manifests

  adding file changes

  added 1 changesets with 1 changes to 1 files

  new changesets 6569b5a81c7e

  updating to branch default

  1 files updated, 0 files merged, 0 files removed, 0 files unresolved

  $ hg clone ssh://user@dummy/server client-topic2

  requesting all changes

  adding changesets

  adding manifests

  adding file changes

  added 1 changesets with 1 changes to 1 files

  new changesets 6569b5a81c7e

  updating to branch default

  1 files updated, 0 files merged, 0 files removed, 0 files unresolved

  $ hg version -v -R client-topic1

  warning: --repository ignored

  Mercurial Distributed SCM (*) (glob)

  (see https://mercurial-scm.org for more information)

  Copyright (C) 2005-* Matt Mackall and others (glob)

  This is free software; see the source for copying conditions. There is NO

  warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.

  Enabled extensions:

    rebase  internal  

    topic   external  * (glob)

    evolve  external  * (glob)

  $ hg clone ssh://user@dummy/server client-plain

  requesting all changes

  adding changesets

  adding manifests

  adding file changes

  added 1 changesets with 1 changes to 1 files

  new changesets 6569b5a81c7e

  updating to branch default

  1 files updated, 0 files merged, 0 files removed, 0 files unresolved

  $ cat << EOF >> client-plain/.hg/hgrc

  > [extensions]

  > topic = !

  > EOF

  $ hg version -v -R client-plain

  warning: --repository ignored

  Mercurial Distributed SCM (*) (glob)

  (see https://mercurial-scm.org for more information)

  Copyright (C) 2005-* Matt Mackall and others (glob)

  This is free software; see the source for copying conditions. There is NO

  warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.

  Enabled extensions:

    rebase  internal  

    evolve  external  * (glob)

Make two commits, with and without a topic, and push them to the server

  $ cd client-topic1

  $ echo b > b

  $ hg topic some-work

  marked working directory as topic: some-work

  $ hg commit -Am 'adding b (topic)'

  adding b

  active topic 'some-work' grew its first changeset

  (see 'hg help topics' for more information)

  $ hg up 0

  0 files updated, 0 files merged, 1 files removed, 0 files unresolved

  $ echo c > c

  $ hg commit -Am 'adding c (no topic)'

  adding c

  $ hg log -r 'all() - 0'

  changeset:   1:2a2e8b3520f2

  topic:       some-work

  user:        test

  date:        Thu Jan 01 00:00:00 1970 +0000

  summary:     adding b (topic)

  changeset:   2:b46feb4d24f9

  tag:         tip

  parent:      0:6569b5a81c7e

  user:        test

  date:        Thu Jan 01 00:00:00 1970 +0000

  summary:     adding c (no topic)

(disable the bare publishing to put a bare draft on the server)

  $ cat << EOF >> ../server/.hg/hgrc

  > [experimental]

  > topic.publish-bare-branch = no

  > EOF

  $ hg push

  pushing to ssh://user@dummy/server

  searching for changes

  remote: adding changesets

  remote: adding manifests

  remote: adding file changes

  remote: added 2 changesets with 2 changes to 2 files (+1 heads)

  $ cd ..

  $ hg --cwd server phase -r 'tip'

  2: draft

Clients with topic can exchange draft changesets both with and without a topic through the server

  $ hg --cwd client-topic2 pull

  pulling from ssh://user@dummy/server

  searching for changes

  adding changesets

  adding manifests

  adding file changes

  added 2 changesets with 2 changes to 2 files (+1 heads)

  new changesets 2a2e8b3520f2:b46feb4d24f9 (2 drafts)

  (run 'hg heads' to see heads)

  $ hg --cwd client-topic2 log -r 'all() - 0'

  changeset:   1:2a2e8b3520f2

  topic:       some-work

  user:        test

  date:        Thu Jan 01 00:00:00 1970 +0000

  summary:     adding b (topic)

  changeset:   2:b46feb4d24f9

  tag:         tip

  parent:      0:6569b5a81c7e

  user:        test

  date:        Thu Jan 01 00:00:00 1970 +0000

  summary:     adding c (no topic)

Client without topic only sees draft changesets if they don't have a topic

  $ hg --cwd client-plain pull

  pulling from ssh://user@dummy/server

  searching for changes

  adding changesets

  adding manifests

  adding file changes

  added 1 changesets with 1 changes to 1 files

  new changesets b46feb4d24f9 (1 drafts)

  (run 'hg update' to get a working copy)

  $ hg --cwd client-plain phase -r 'all() - 0'

  1: draft

  $ hg --cwd client-plain log -r 'all() - 0'

  changeset:   1:b46feb4d24f9

  tag:         tip

  user:        test

  date:        Thu Jan 01 00:00:00 1970 +0000

  summary:     adding c (no topic)