$ . ${TESTDIR}/testlib/pythonpath.sh

  $ cat >> $HGRCPATH <<EOF

  > [defaults]

  > amend=-d "0 0"

  > [web]

  > push_ssl = false

  > allow_push = *

  > [phases]

  > publish = False

  > [experimental]

  > bundle2-exp=False # < Mercurial-4.0

  > [devel]

  > legacy.exchange=bundle1

  > [extensions]

  > EOF

  $ mkcommit() {

  >    echo "$1" > "$1"

  >    hg add "$1"

  >    hg ci -m "add $1"

  > }

  $ hg init server

Try the multiple ways to setup the extension

  $ hg -R server log --config 'extensions.evolve.serveronly='

  $ hg -R server log --config "extensions.evolve.serveronly=${SRCDIR}/hgext3rd/evolve/serveronly.py"

  $ PYTHONPATH=$HGTEST_ORIG_PYTHONPATH hg -R server log --config "extensions.evolve.serveronly=${SRCDIR}/hgext3rd/evolve/serveronly.py"

setup repo

  $ echo "[extensions]" >> ./server/.hg/hgrc

  $ echo "evolve.serveronly=" >> ./server/.hg/hgrc

  $ hg serve -R server -n test -p $HGPORT -d --pid-file=hg.pid -A access.log -E errors.log --traceback

  $ cat hg.pid >> $DAEMON_PIDS

  $ hg clone http://localhost:$HGPORT/ client

  no changes found

  updating to branch default

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

  $ cat ./errors.log

  $ echo "[extensions]" >> ./client/.hg/hgrc

  $ echo "evolve=" >> ./client/.hg/hgrc

  $ cp -r client other

Smoke testing

===============

  $ cd client

  $ mkcommit 0

  $ mkcommit a

  $ hg push

  pushing to http://localhost:$HGPORT/

  searching for changes

  abort: remote error:

  incompatible Mercurial client; bundle2 required

  (see https://www.mercurial-scm.org/wiki/IncompatibleClient)

  [255]

  $ cat ../errors.log