$ cat <<EOF >> $HGRCPATH

  > [extensions]

  > schemes=

  > 

  > [schemes]

  > l = http://localhost:$HGPORT/

  > parts = http://{1}:$HGPORT/

  > z = file:\$PWD/

  > EOF

  $ hg init test

  $ cd test

  $ echo a > a

  $ hg ci -Am initial

  adding a

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

  $ cat hg.pid >> $DAEMON_PIDS

  $ hg incoming l://

  comparing with l://

  searching for changes

  no changes found

  [1]

check that {1} syntax works

  $ hg incoming --debug parts://localhost

  using http://localhost:$HGPORT/

  sending capabilities command

  comparing with parts://localhost/

  query 1; heads

  searching for changes

  all remote heads known locally

  no changes found

  [1]

check that paths are expanded

  $ PWD=`pwd` hg incoming z://

  comparing with z://

  searching for changes

  no changes found

  [1]

errors

  $ cat errors.log