hooks: add a hook point after write commands

Summary: This allows us to run commands after changes were made to the repo.

Reviewed By: DurhamG

Differential Revision: D22993218

fbshipit-source-id: d9943dcda94da42970fb9107f48f4caa14b6a9d4

Author: quark-zju

eden/scm/edenscm/mercurial/dispatch.py

@@ -938,6 +938,8 @@ def runcommand(lui, repo, cmd, fullargs, ui, options, d, cmdpats, cmdoptions):
         )
         _log_exception(lui, e)
         raise
+    if getattr(repo, "_txnreleased", False):
+        hook.hook(lui, repo, "postwritecommand", False)
     return ret
 
 

eden/scm/edenscm/mercurial/localrepo.py

@@ -592,6 +592,10 @@ def __init__(self, baseui, path, create=False):
         # generic mapping between names and nodes
         self.names = namespaces.namespaces(self)
 
+        # whether the repo is changed (by transaction).
+        # currently used to decide whether to run fsync.
+        self._txnreleased = False
+
         self._applyopenerreqs()
 
         self._eventreporting = True
@@ -1583,6 +1587,7 @@ def releasefn(tr, success):
                 # transaction running
                 repo.dirstate.write(None)
                 flushchangelog(tr)
+                repo._txnreleased = True
             else:
                 # discard all changes (including ones already written
                 # out) in this transaction