tests/test-websub.t

revset: add new topographical sort

Sort revisions in reverse revision order but grouped by topographical branches.
Visualised as a graph, instead of:

  o  4
  |
  | o  3
  | |
  | o  2
  | |
  o |  1
  |/
  o  0

revisions on a 'main' branch are emitted before 'side' branches:

  o  4
  |
  o  1
  |
  | o  3
  | |
  | o  2
  |/
  o  0

where what constitutes a 'main' branch is configurable, so the sort could also
result in:

  o  3
  |
  o  2
  |
  | o  4
  | |
  | o  1
  |/
  o  0

This sort was already available as an experimental option in the graphmod
module, from which it is now removed.

This sort is best used with hg log -G:

  $ hg log -G "sort(all(), topo)"

#require serve

  $ hg init test
  $ cd test

  $ cat > .hg/hgrc <<EOF
  > [extensions]
  > # this is only necessary to check that the mapping from
  > # interhg to websub works
  > interhg =
  > 
  > [websub]
  > issues = s|Issue(\d+)|<a href="http://bts.example.org/issue\1">Issue\1</a>|
  > 
  > [interhg]
  > # check that we maintain some interhg backwards compatibility...
  > # yes, 'x' is a weird delimiter...
  > markbugs = sxbugx<i class="\x">bug</i>x
  > EOF

  $ touch foo
  $ hg add foo
  $ hg commit -d '1 0' -m 'Issue123: fixed the bug!'

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

log

  $ get-with-headers.py localhost:$HGPORT "rev/tip" | grep bts
  <div class="description"><a href="http://bts.example.org/issue123">Issue123</a>: fixed the <i class="x">bug</i>!</div>
errors

  $ cat errors.log

  $ cd ..