fsmonitor: add new watchman notifications to fsmonitor extension
The fsmonitor extension currently sends state-enter and state-leave
notifications to watchman on the update operation. This commit creates
additional notifications for the following events :
- transaction creation and commit/abort. A state-enter notification will be
sent when a transaction is created. It will provide the working copy
parent's hash. A state-leave notification will be sent when the
transaction is committed or aborted. It will provide the working copy
parent's hash.
- calls to set-parent will cause state-enter and state-leave notifications
to be sent. The state-enter notification will be sent prior to the
set-parent operation and the working copy parent's hash will be provided at
this time. The state-leave notification will be sent after the set-parent
operation completes providing the working copy parents hash.
Test Plan:
tested on dev server to check that necessary notifications were sent/received
Differential Revision: https://phab.mercurial-scm.org/D989
running: init test1
result: None
running: add foo
result: 0
running: commit -m commit1 -d 2000-01-01 foo
result: None
running: commit -m commit2 -d 2000-01-02 foo
result: None
running: log -r 0
changeset: 0:0e4634943879
user: test
date: Sat Jan 01 00:00:00 2000 +0000
summary: commit1
result: None
running: log -r tip
changeset: 1:45589e459b2e
tag: tip
user: test
date: Sun Jan 02 00:00:00 2000 +0000
summary: commit2
result: None