Fixing issue1542, adding a relevant test

inotify is smart enough to notify you about any changes in a
directory, even if you only watch the directory, and none if its
contents: the recursive add_watch I added was unnecessary.

The only thing that matters here is the recursive status update on
directory deletion.

And scan() has to be called _before_ the deferred call is registered.
(race condition: depending on the times, the previous patch could
apparently fail on the provided test. It's not the case anymore.)

tests/test-inotify-issue1542

@@ -0,0 +1,32 b''
+#!/bin/sh
+
+"$TESTDIR/hghave" inotify || exit 80
+
+hg init
+
+touch a
+mkdir dir
+touch dir/b
+touch dir/c
+
+echo "[extensions]" >> $HGRCPATH
+echo "inotify=" >> $HGRCPATH
+
+hg add dir/c
+
+echo % inserve
+hg inserve -d --pid-file=hg.pid 2>&1
+cat hg.pid >> "$DAEMON_PIDS"
+
+hg st
+
+echo % moving dir out
+mv dir ../tmp-test-inotify-issue1542
+
+echo % status
+hg st
+
+sleep 1
+echo "Are we able to kill the service? if not, the service died on some error"
+kill `cat hg.pid`
+

tests/test-inotify-issue1542.out

@@ -0,0 +1,11 b''
+% inserve
+A dir/c
+? a
+? dir/b
+? hg.pid
+% moving dir out
+% status
+! dir/c
+? a
+? hg.pid
+Are we able to kill the service? if not, the service died on some error

hgext/inotify/server.py

@@ -304,6 +304,11 b' class Watcher(object):'
                         dd[fn] = status
             else:
                 d.pop(fn, None)
+        elif not status:
+            # a directory is being removed, check its contents
+            for subfile, b in oldstatus.copy().iteritems():
+                self.updatestatus(wfn + '/' + subfile, None)
+
 
     def check_deleted(self, key):
         # Files that had been deleted but were present in the dirstate
@@ -473,8 +478,7 b' class Watcher(object):'
 
         if evt.mask & inotify.IN_ISDIR:
             self.scan(wpath)
-        else:
-            self.schedule_work(wpath, 'd')
+        self.schedule_work(wpath, 'd')
 
     def process_modify(self, wpath, evt):
         if self.ui.debugflag: