inotify: do not rely on stat(.hg/dirstate) to invalidate our dirstate

inotify: do not rely on stat(.hg/dirstate) to invalidate our dirstate

stat() is not reliable when several events happen quickly. Which means
that if two hg actions occur in the same second, stat() result will not
reflect the second change. And only _one_ invalidate() call was done.

Also ignore the events that occur when wlock is held, since wlock release
will trigger a full rescan anyway.

Fixes 17 run-tests.py --inotify tests.

--- a/hgext/inotify/linuxserver.py	Fri Nov 27 09:23:10 2009 +0900
+++ b/hgext/inotify/linuxserver.py	Fri Dec 11 15:58:09 2009 +0900
@@ -170,6 +170,7 @@
         server.repowatcher.__init__(self, ui, dirstate, root)
 
         self.lastevent = {}
+        self.dirty = False
         try:
             self.watcher = watcher.watcher()
         except OSError, err:
@@ -214,7 +215,6 @@
     def setup(self):
         self.ui.note(_('watching directories under %r\n') % self.wprefix)
         self.add_watch(self.wprefix + '.hg', inotify.IN_DELETE)
-        self.check_dirstate()
 
     def scan(self, topdir=''):
         ds = self.dirstate._map.copy()
@@ -272,8 +272,6 @@
         if wpath == '.hgignore':
             self.update_hgignore()
         elif wpath.startswith('.hg/'):
-            if wpath == '.hg/wlock':
-                self.check_dirstate()
             return
 
         self.deletefile(wpath, self.dirstate[wpath])
@@ -343,16 +341,26 @@
             if wpath.startswith('.hg/') and evt.mask & inotify.IN_ISDIR:
                 # ignore subdirectories of .hg/ (merge, patches...)
                 continue
+            if wpath == ".hg/wlock":
+                if evt.mask & inotify.IN_DELETE:
+                    self.dirstate.invalidate()
+                    self.dirty = False
+                    self.scan()
+                elif evt.mask & inotify.IN_CREATE:
+                    self.dirty = True
+            else:
+                if self.dirty:
+                    continue
 
-            if evt.mask & inotify.IN_UNMOUNT:
-                self.process_unmount(wpath, evt)
-            elif evt.mask & (inotify.IN_MODIFY | inotify.IN_ATTRIB):
-                self.process_modify(wpath, evt)
-            elif evt.mask & (inotify.IN_DELETE | inotify.IN_DELETE_SELF |
-                             inotify.IN_MOVED_FROM):
-                self.process_delete(wpath, evt)
-            elif evt.mask & (inotify.IN_CREATE | inotify.IN_MOVED_TO):
-                self.process_create(wpath, evt)
+                if evt.mask & inotify.IN_UNMOUNT:
+                    self.process_unmount(wpath, evt)
+                elif evt.mask & (inotify.IN_MODIFY | inotify.IN_ATTRIB):
+                    self.process_modify(wpath, evt)
+                elif evt.mask & (inotify.IN_DELETE | inotify.IN_DELETE_SELF |
+                                 inotify.IN_MOVED_FROM):
+                    self.process_delete(wpath, evt)
+                elif evt.mask & (inotify.IN_CREATE | inotify.IN_MOVED_TO):
+                    self.process_create(wpath, evt)
 
         self.lastevent.clear()
 

--- a/hgext/inotify/server.py	Fri Nov 27 09:23:10 2009 +0900
+++ b/hgext/inotify/server.py	Fri Dec 11 15:58:09 2009 +0900
@@ -281,17 +281,6 @@
             del self.statustrees[key].dir(root).files[fn]
             del self.tree.dir(root).files[fn]
 
-    def check_dirstate(self):
-        ds_info = self.dirstate_info()
-        if ds_info == self.ds_info:
-            return
-        self.ds_info = ds_info
-        if not self.ui.debugflag:
-            self.last_event = None
-        self.dirstate.invalidate()
-        self.handle_timeout()
-        self.scan()
-
     def update_hgignore(self):
         # An update of the ignore file can potentially change the
         # states of all unknown and ignored files.