hg: write narrow patterns after repo creation

Now that hg.clone() knows when a narrow clone is requested, it
makes sense to have it update the narrow patterns for the repo
soon after the repo is created, before any exchange occurs.

Previously, the narrow extension was monkeypatching an exchange
function to do this. The old code is redundant and has been
removed.

Differential Revision: https://phab.mercurial-scm.org/D4541

hgext/narrow/narrowcommands.py

@@ -92,19 +92,6 b' def clonenarrowcmd(orig, ui, repo, *args'
 
     if opts['narrow']:
         def pullbundle2extraprepare_widen(orig, pullop, kwargs):
-            # Create narrow spec patterns from clone flags
-            includepats = narrowspec.parsepatterns(opts['include'])
-            excludepats = narrowspec.parsepatterns(opts['exclude'])
-
-            if not includepats and excludepats:
-                # If nothing was included, we assume the user meant to include
-                # everything, except what they asked to exclude.
-                includepats = {'path:.'}
-
-            pullop.repo.setnarrowpats(includepats, excludepats)
-
-            # This will populate 'includepats' etc with the values from the
-            # narrowspec we just saved.
             orig(pullop, kwargs)
 
             if opts.get('depth'):

mercurial/hg.py

@@ -737,6 +737,10 b' def clone(ui, peeropts, source, dest=Non'
                 revs = None
             local = destpeer.local()
             if local:
+                if narrow:
+                    with local.lock():
+                        local.setnarrowpats(storeincludepats, storeexcludepats)
+
                 u = util.url(abspath)
                 defaulturl = bytes(u)
                 local.ui.setconfig('paths', 'default', defaulturl, 'clone')