reverse sense of return value from python hooks.
old scheme (False/None/0/'' == fail) made coding style
unnatural, did not allow use of mercurial commands as hooks.
new scheme (False/None/0 == pass) is pythonic, does not require peculiar
"return True" at ends of hooks, allows hooks like this:
[hooks]
# update working dir after push into this repo
changegroup.update = python:mercurial.commands.update
# basic operation
adding a
changeset 2:b38a34ddfd9f backs out changeset 1:a820f4f40a57
a
# file that was removed is recreated
adding a
adding a
changeset 2:44cd84c7349a backs out changeset 1:76862dcce372
content
# backout of backout is as if nothing happened
removing a
changeset 3:0dd8a0ed5e99 backs out changeset 2:44cd84c7349a
cat: a: No such file or directory
# backout with merge
adding a
changeset 3:6c77ecc28460 backs out changeset 1:314f55b1bf23
merging with changeset 2:b66ea5b77abb
merging a
0 files updated, 1 files merged, 0 files removed, 0 files unresolved
(branch merge, don't forget to commit)
line 1