tests/test-wireproto.t

discovery: drop findoutgoing and simplify findcommonincoming's api

This is a long desired cleanup and paves the way for new discovery.
To specify subsets for bundling changes, all code should use the heads
of the desired subset ("heads") and the heads of the common subset
("common") to be excluded from the bundled set. These can be used
revlog.findmissing instead of revlog.nodesbetween.

This fixes an actual bug exposed by the change in test-bundle-r.t
where we try to bundle a changeset while specifying that said changeset
is to be assumed already present in the target. This used to still
bundle the changeset. It no longer does. This is similar to the bugs
fixed by the recent switch to heads/common for incoming/pull.

Test wire protocol argument passing

Setup repo:

  $ hg init repo

Local:

  $ hg debugwireargs repo eins zwei --three drei --four vier
  eins zwei drei vier None
  $ hg debugwireargs repo eins zwei --four vier
  eins zwei None vier None
  $ hg debugwireargs repo eins zwei
  eins zwei None None None
  $ hg debugwireargs repo eins zwei --five fuenf
  eins zwei None None fuenf

HTTP:

  $ hg serve -R repo -p $HGPORT -d --pid-file=hg1.pid -E error.log -A access.log
  $ cat hg1.pid >> $DAEMON_PIDS

  $ hg debugwireargs http://localhost:$HGPORT/ un deux trois quatre
  un deux trois quatre None
  $ hg debugwireargs http://localhost:$HGPORT/ eins zwei --four vier
  eins zwei None vier None
  $ hg debugwireargs http://localhost:$HGPORT/ eins zwei
  eins zwei None None None
  $ hg debugwireargs http://localhost:$HGPORT/ eins zwei --five fuenf
  eins zwei None None None
  $ cat access.log
  * - - [*] "GET /?cmd=capabilities HTTP/1.1" 200 - (glob)
  * - - [*] "GET /?cmd=debugwireargs&four=quatre&one=un&three=trois&two=deux HTTP/1.1" 200 - (glob)
  * - - [*] "GET /?cmd=debugwireargs&four=quatre&one=un&three=trois&two=deux HTTP/1.1" 200 - (glob)
  * - - [*] "GET /?cmd=capabilities HTTP/1.1" 200 - (glob)
  * - - [*] "GET /?cmd=debugwireargs&four=vier&one=eins&two=zwei HTTP/1.1" 200 - (glob)
  * - - [*] "GET /?cmd=debugwireargs&four=vier&one=eins&two=zwei HTTP/1.1" 200 - (glob)
  * - - [*] "GET /?cmd=capabilities HTTP/1.1" 200 - (glob)
  * - - [*] "GET /?cmd=debugwireargs&one=eins&two=zwei HTTP/1.1" 200 - (glob)
  * - - [*] "GET /?cmd=debugwireargs&one=eins&two=zwei HTTP/1.1" 200 - (glob)
  * - - [*] "GET /?cmd=capabilities HTTP/1.1" 200 - (glob)
  * - - [*] "GET /?cmd=debugwireargs&one=eins&two=zwei HTTP/1.1" 200 - (glob)
  * - - [*] "GET /?cmd=debugwireargs&one=eins&two=zwei HTTP/1.1" 200 - (glob)

SSH (try to exercise the ssh functionality with a dummy script):

  $ cat <<EOF > dummyssh
  > import sys
  > import os
  > os.chdir(os.path.dirname(sys.argv[0]))
  > if sys.argv[1] != "user@dummy":
  >     sys.exit(-1)
  > if not os.path.exists("dummyssh"):
  >     sys.exit(-1)
  > os.environ["SSH_CLIENT"] = "127.0.0.1 1 2"
  > r = os.system(sys.argv[2])
  > sys.exit(bool(r))
  > EOF

  $ hg debugwireargs --ssh "python ./dummyssh" ssh://user@dummy/repo uno due tre quattro
  uno due tre quattro None
  $ hg debugwireargs --ssh "python ./dummyssh" ssh://user@dummy/repo eins zwei --four vier
  eins zwei None vier None
  $ hg debugwireargs --ssh "python ./dummyssh" ssh://user@dummy/repo eins zwei
  eins zwei None None None
  $ hg debugwireargs --ssh "python ./dummyssh" ssh://user@dummy/repo eins zwei --five fuenf
  eins zwei None None None