localrepo: add hook point to invalidate everything on each command-server run

MQ extension will wrap this function to invalidate its state.

repo.invalidate cannot be wrapped for this purpose because qpush obtains
repo.lock in the middle of the operation, triggering repo.invalidate.  Also,
it seems wrong to obtain lock earlier because mq data is non-store parts.

mercurial/commandserver.py

@@ -188,8 +188,7 @@ class server(object):
         repoui = self.repoui.__class__(self.repoui)
         repoui.copy = copiedui.copy # redo copy protection
         self.repo.ui = self.repo.dirstate._ui = repoui
-        self.repo.invalidate()
-        self.repo.invalidatedirstate()
+        self.repo.invalidateall()
 
         req = dispatch.request(args[:], copiedui, self.repo, self.cin,
                                self.cout, self.cerr)

mercurial/localrepo.py

@@ -993,6 +993,13 @@ class localrepository(object):
                 pass
         self.invalidatecaches()
 
+    def invalidateall(self):
+        '''Fully invalidates both store and non-store parts, causing the
+        subsequent operation to reread any outside changes.'''
+        # extension should hook this to invalidate its caches
+        self.invalidate()
+        self.invalidatedirstate()
+
     def _lock(self, vfs, lockname, wait, releasefn, acquirefn, desc):
         try:
             l = lockmod.lock(vfs, lockname, 0, releasefn, desc=desc)