hook: centralize passing HG_PENDING to external hook process This patch centralizes passing HG_PENDING to external hook process into '_exthook()'. To make in-memory changes visible to external hook process, this patch does: - write (or schedule to write) in-memory dirstate changes, and - set HG_PENDING environment variable, if: - a transaction is running, and - there are in-memory changes to be visible This patch tests some commands with some hooks, because transaction activity of a same hook differs from each other ("---": "not tested"). ======== ========= ========= ============ command preupdate precommit pretxncommit ======== ========= ========= ============ unshelve o --- --- backout x --- --- import --- o o qrefresh --- x o ======== ========= ========= ============ Each hooks are examined separately to prevent in-memory changes from being visible to external process accidentally by side effect of hooks previously invoked.

--- a/mercurial/hook.py	Sat Oct 17 01:15:34 2015 +0900
+++ b/mercurial/hook.py	Sat Oct 17 01:15:34 2015 +0900
@@ -118,6 +118,13 @@
 
     starttime = time.time()
     env = {}
+
+    # make in-memory changes visible to external process
+    tr = repo.currenttransaction()
+    repo.dirstate.write(tr)
+    if tr and tr.writepending():
+        env['HG_PENDING'] = repo.root
+
     for k, v in args.iteritems():
         if callable(v):
             v = v()