cachevfs: add a vfs dedicated to cache
Most of the cache content lives in '.hg/cache/'. Moreover they are computed
exclusively from data in the '.hg/store' directory. This creates issues with
the share extension as the '.hg/store' directory is shared but the '.hg/cache'
is not. On large repositories, this makes this prevent some usage of the share
extension inefficient as some caches can take minutes to be recomputed.
To improve the situation, we introduce a new 'cachevfs' that will be dedicated
to cache reading and writing. In the next patches of this series, we'll
migrate the 4 existing caches to it and update the share extension.
--- a/mercurial/localrepo.py Sat Jul 15 22:40:51 2017 +0200
+++ b/mercurial/localrepo.py Sat Jul 15 23:05:04 2017 +0200
@@ -423,6 +423,8 @@
self.svfs = self.store.vfs
self.sjoin = self.store.join
self.vfs.createmode = self.store.createmode
+ self.cachevfs = vfsmod.vfs(self.vfs.join('cache'))
+ self.cachevfs.createmode = self.store.createmode
if (self.ui.configbool('devel', 'all-warnings') or
self.ui.configbool('devel', 'check-locks')):
if util.safehasattr(self.svfs, 'vfs'): # this is filtervfs
--- a/mercurial/statichttprepo.py Sat Jul 15 22:40:51 2017 +0200
+++ b/mercurial/statichttprepo.py Sat Jul 15 23:05:04 2017 +0200
@@ -124,6 +124,7 @@
vfsclass = build_opener(ui, authinfo)
self.vfs = vfsclass(self.path)
+ self.cachevfs = vfsclass(self.vfs.join('cache'))
self._phasedefaults = []
self.names = namespaces.namespaces()