support hooks written in python. to write hook in python, create module with hook function inside. make sure mercurial can import module (put it in $PYTHONPATH or load it as extension). hook function should look like this: def myhook(ui, repo, hooktype, **kwargs): if hook_passes: return True elif hook_explicitly_fails: return False elif some_other_failure: import util raise util.Abort('helpful failure message') else: return # implicit return of None makes hook fail! then in .hgrc, add hook with "python:" prefix: [hooks] commit = python:mymodule.myhook

#!/bin/sh

hg init

echo foo > a
echo foo > b
hg add a b

hg ci -m "test" -d "1000000 0"

echo blah > a

hg ci -m "branch a" -d "1000000 0"

hg co 0

echo blah > b

hg ci -m "branch b" -d "1000000 0"
HGMERGE=true hg up -m 1

hg ci -m "merge b/a -> blah" -d "1000000 0"

hg co 1
HGMERGE=true hg up -m 2
hg ci -m "merge a/b -> blah" -d "1000000 0"

hg log
hg debugindex .hg/00changelog.i

echo

echo 1
hg manifest 1
echo 2
hg manifest 2
echo 3
hg manifest 3
echo 4
hg manifest 4

echo

hg debugindex .hg/data/a.i

hg verify