$ cat >> $HGRCPATH <<EOF

  > [defaults]

  > amend=-d "0 0"

  > [experimental]

  > obsmarkers-exchange-debug=true

  > bundle2-exp=true

  > [ui]

  > ssh=python "$RUNTESTDIR/dummyssh"

  > [phases]

  > publish = False

  > [extensions]

  > EOF

  $ echo "evolve=$(echo $(dirname $TESTDIR))/hgext3rd/evolve/" >> $HGRCPATH

  $ mkcommit() {

  >    echo "$1" > "$1"

  >    hg add "$1"

  >    hg ci -m "add $1"

  > }

setup repo

  $ hg init server

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

  no changes found

  updating to branch default

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

  $ cp -r client other

Smoke testing

===============.t

  $ cd client

  $ mkcommit 0

  $ mkcommit a

  $ 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

  $ hg pull

  pulling from ssh://user@dummy/server

  searching for changes

  no changes found

  $ hg pull -R ../other

  pulling from ssh://user@dummy/server

  requesting all changes

  adding changesets

  adding manifests

  adding file changes

  added 2 changesets with 2 changes to 2 files

  new changesets 8685c6d34325:4957bfdac07e

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

  $ hg push -R ../other

  pushing to ssh://user@dummy/server

  searching for changes

  no changes found

  [1]

Push

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

  $ echo 'A' > a

  $ hg amend

  $ hg push

  pushing to ssh://user@dummy/server

  searching for changes

  remote: adding changesets

  remote: adding manifests

  remote: adding file changes

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

  remote: obsmarker-exchange: 92 bytes received

  remote: 1 new obsolescence markers

  remote: obsoleted 1 changesets

  $ hg push

  pushing to ssh://user@dummy/server

  searching for changes

  no changes found

  [1]

Pull

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

  $ hg -R ../other pull

  pulling from ssh://user@dummy/server

  searching for changes

  adding changesets

  adding manifests

  adding file changes

  added 1 changesets with 1 changes to [12] files \(\+1 heads\) (re)

  obsmarker-exchange: 92 bytes received

  1 new obsolescence markers

  obsoleted 1 changesets

  new changesets 9d1c114e7797

  (run 'hg heads' to see heads)

  $ hg -R ../other pull

  pulling from ssh://user@dummy/server

  searching for changes

  no changes found

Test some markers discovery

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

  $ echo c > C

  $ hg add C

  $ hg commit -m C

  $ echo c >> C

  $ hg amend

  $ hg push

  pushing to ssh://user@dummy/server

  searching for changes

  remote: adding changesets

  remote: adding manifests

  remote: adding file changes

  remote: added 1 changesets with 1 changes to 1 files

  remote: obsmarker-exchange: 92 bytes received

  remote: 1 new obsolescence markers

  $ hg -R ../other 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

  obsmarker-exchange: 92 bytes received

  1 new obsolescence markers

  new changesets a5687ec59dd4

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

some common hidden

  $ hg touch .

  $ hg push

  pushing to ssh://user@dummy/server

  searching for changes

  remote: adding changesets

  remote: adding manifests

  remote: adding file changes

  remote: added 1 changesets with 0 changes to 1 files (+1 heads)

  remote: obsmarker-exchange: 167 bytes received

  remote: 1 new obsolescence markers

  remote: obsoleted 1 changesets

  $ hg -R ../other pull

  pulling from ssh://user@dummy/server

  searching for changes

  adding changesets

  adding manifests

  adding file changes

  added 1 changesets with 0 changes to 1 files (+1 heads)

  obsmarker-exchange: 167 bytes received

  1 new obsolescence markers

  obsoleted 1 changesets

  new changesets * (glob)

  (run 'hg heads' to see heads)

test discovery avoid exchanging known markers

  $ hg push

  pushing to ssh://user@dummy/server

  searching for changes

  no changes found

  [1]

  $ hg -R ../other pull

  pulling from ssh://user@dummy/server

  searching for changes

  no changes found

test discovery can be disabled

  $ hg push --config experimental.evolution.obsdiscovery=no

  pushing to ssh://user@dummy/server

  searching for changes

  (skipping discovery of obsolescence markers, will exchange everything)

  (controled by 'experimental.evolution.obsdiscovery' configuration)

  no changes found

  remote: obsmarker-exchange: 258 bytes received

  [1]

  $ hg -R ../other pull --config experimental.evolution.obsdiscovery=no

  pulling from ssh://user@dummy/server

  searching for changes

  no changes found

  (skipping discovery of obsolescence markers, will exchange everything)

  (controled by 'experimental.evolution.obsdiscovery' configuration)

  obsmarker-exchange: 258 bytes received

  $ cd ..

And disable it server side too:

  $ hg serve -R server -n test -p $HGPORT -d --pid-file=hg.pid -A access.log -E errors.log  --config experimental.evolution.obsdiscovery=no

  $ cat hg.pid >> $DAEMON_PIDS

  $ curl -s http://localhost:$HGPORT/?cmd=capabilities

  _evoext_getbundle_obscommon batch branchmap bundle2=HG20%0Abookmarks%0Achangegroup%3D01%2C02%0Adigests%3Dmd5%2Csha1%2Csha512%0Aerror%3Dabort%2Cunsupportedcontent%2Cpushraced%2Cpushkey%0Ahgtagsfnodes%0Alistkeys%0Aobsmarkers%3DV0%2CV1%0Aphases%3Dheads%0Apushkey%0Aremote-changegroup%3Dhttp%2Chttps changegroupsubset compression=zstd,zlib getbundle httpheader=1024 httpmediatype=0.1rx,0.1tx,0.2tx known lookup pushkey streamreqs=generaldelta,revlogv1 unbundle=HG10GZ,HG10BZ,HG10UN unbundlehash (no-eol)

Check we cannot use pushkey for marker exchange anymore

  $ hg debugpushkey http://localhost:$HGPORT/ obsolete

  abort: HTTP Error 410: won't exchange obsmarkers through pushkey

  [255]

  $ hg debugpushkey ssh://user@dummy/server obsolete

  remote: abort: won't exchange obsmarkers through pushkey

  remote: (upgrade your client or server to use the bundle2 protocol)

  abort: unexpected response: empty string

  [255]

(do some extra pulling to be sure)

  $ hg -R client pull http://localhost:$HGPORT/

  pulling from http://localhost:$HGPORT/

  searching for changes

  no changes found

  obsmarker-exchange: 258 bytes received

  $ hg -R client pull http://localhost:$HGPORT/ --config experimental.evolution=createmarkers

  pulling from http://localhost:$HGPORT/

  searching for changes

  no changes found

  $ hg -R client pull http://localhost:$HGPORT/ --config experimental.evolution=createmarkers --config extensions.evolve='!'

  pulling from http://localhost:$HGPORT/

  searching for changes

  no changes found

But we do let it goes fine on repository with exchange disabled:

  $ $RUNTESTDIR/killdaemons.py $DAEMON_PIDS

  $ hg serve -R server -n test -p $HGPORT -d --pid-file=hg.pid -A access.log -E errors.log  --config experimental.evolution='!'

  $ hg debugpushkey http://localhost:$HGPORT/ obsolete

(do some extra pulling to be sure)

  $ hg -R client pull http://localhost:$HGPORT/

  pulling from http://localhost:$HGPORT/

  searching for changes

  no changes found

  $ hg -R client pull http://localhost:$HGPORT/ --config experimental.evolution=createmarkers

  pulling from http://localhost:$HGPORT/

  searching for changes

  no changes found

  $ hg -R client pull http://localhost:$HGPORT/ --config experimental.evolution=createmarkers --config extensions.evolve='!'

  pulling from http://localhost:$HGPORT/

  searching for changes

  no changes found

  $ $RUNTESTDIR/killdaemons.py $DAEMON_PIDS