merge with crew.

make server tests use --daemon.

Merge with upstream

Added help string for --daemon-pipefds

stop read end of pipe from staying open forever in child process.

add --daemon option to serve command. for issue 45. code looks odd because it is portable to windows. windows does not have os.fork, so have to spawn and use pipe to tell parent ready instead.

AmbiguousCommand is raised too soon. Right now, hg raises AmbiguousCommand as soon as it finds two commands/aliases that start with the substring it's searching for, even though it may still find a full match later on. This is a bit hard to hit on purpose, because hg checks the list of commands in whatever order is returned by table.keys(), which will change when you add an alias to a command. You should be able to hit it by adding an alias "u" to the "identify" command - not that that makes a lot of sense...

Don't hard-code /tmp in test-ro-message This makes the test succeed when $TMPDIR is set.

Merge with crew

add preoutgoing and outgoing hooks. preoutgoing lets prevent pull over http or ssh. outgoing lets notify after pull.

i forgot to change the test output for test-hook.

tests for new hooks. fix things i found when writing tests.

fix test-help diff options.

merge with crew.

add -p option to tip. for issue 64.

add prechangegroup and pretxnchangegroup hooks. prechangegroup lets you stop push, pull or unbundle before it begins. pretxnchangegroup lets you inspect changegroup before transaction is committed, and roll back if you not like it.

merge with crew.

add -w and -p options to diff. this is for issue 126.

fix names of parent changeset ids in hooks. fix hook part of man page.

prefix hook env var names with HG_. old names are still provided, but doc says they deprecated.

merge with crew

add a -b/--branch option to 'hg parents'

Fix diff against an empty file (issue124) and add a test for this.

catch errors and throw exception with invalid binary patch data

add pretxncommit hook. hook allows check of changeset after create, but before transaction is committed. hook failure rolls transaction back. makes place for local policies like commit message must contain bug id or reviewer signoff. change also adds parent changeset ids to commit hook environment, because is cheap and useful.

add pretag and tag hooks. pretag hook lets hook decide how tags can be named. tag hook is notifier.

hook parameters must be strings.

make hook code nicer. pre hooks can raise exception if fail. tidy up better if exception raised (like KeyboardInterrupt) when running hook program.

hooks run after transactions finish must not affect method results.

Refactor excessive merge detection, add test