changeset 39690:e0c5017124b3

localrepo: load extensions in makelocalrepository()

Behavior does change subtly.

First, we now load the hgrc before optionally setting up the vfs ward.
That's fine: the vfs ward is for debugging and we know we won't hit it
when reading .hg/hgrc. If the loaded extension were performing repo/vfs
I/O, then we'd be worried. But extensions don't have access to the
repo object that loaded them when they are loaded. Unless they are
doing stack walking as part of module loading (which would be crazy),
they shouldn't have access to the repo that incurred their load.

Second, we now load extensions outside of the try..except IOError
block. Previously, if loading an extension raised IOError, it would
be silently ignored. I'm pretty sure the IOError is there for missing
.hgrc files and should never have been ignored for issues loading
extensions. I don't think this matters in reality because extension
loading traps I/O errors.

Differential Revision: https://phab.mercurial-scm.org/D4566

--- a/mercurial/localrepo.py	Wed Sep 12 11:34:02 2018 -0700
+++ b/mercurial/localrepo.py	Wed Sep 12 11:44:57 2018 -0700
@@ -397,6 +397,16 @@
     hgpath = wdirvfs.join(b'.hg')
     hgvfs = vfsmod.vfs(hgpath, cacheaudited=True)
 
+    # The .hg/hgrc file may load extensions or contain config options
+    # that influence repository construction. Attempt to load it and
+    # process any new extensions that it may have pulled in.
+    try:
+        ui.readconfig(hgvfs.join(b'hgrc'), root=wdirvfs.base)
+    except IOError:
+        pass
+    else:
+        extensions.loadall(ui)
+
     return localrepository(
         baseui=baseui,
         ui=ui,
@@ -507,11 +517,6 @@
         # Callback are in the form: func(repo, roots) --> processed root.
         # This list it to be filled by extension during repo setup
         self._phasedefaults = []
-        try:
-            self.ui.readconfig(self.vfs.join("hgrc"), self.root)
-            self._loadextensions()
-        except IOError:
-            pass
 
         if featuresetupfuncs:
             self.supported = set(self._basesupported) # use private copy
@@ -675,9 +680,6 @@
     def close(self):
         self._writecaches()
 
-    def _loadextensions(self):
-        extensions.loadall(self.ui)
-
     def _writecaches(self):
         if self._revbranchcache:
             self._revbranchcache.write()