diff mercurial/debugcommands.py @ 41964:d121823072b8

manifestcache: protect write with `wlock` instead of `lock`

The `wlock` is taken by both `update` and `commit` type operation. This would
help persisting the cache more aggressively.

An explicit test is introduced. However, we can already see the effect of this
change on earlier test output.

--- a/mercurial/debugcommands.py	Thu Mar 14 09:12:55 2019 +0000
+++ b/mercurial/debugcommands.py	Fri Mar 15 15:07:43 2019 +0000
@@ -1476,13 +1476,13 @@
             raise error.Abort(msg)
 
     if opts.get(r'clear'):
-        with repo.lock():
+        with repo.wlock():
             cache = getcache()
             cache.clear(clear_persisted_data=True)
             return
 
     if add:
-        with repo.lock():
+        with repo.wlock():
             m = repo.manifestlog
             store = m.getstorage(b'')
             for n in add: