narrow: move status-filtering to core and to ctx

narrow: move status-filtering to core and to ctx

One of my recent changes from repo.status(ctx1, ctx2) to
ctx1.status(ctx2) broke some of our Google-internal tests. The problem
turned out to be that the narrow extension was overriding
repo.status() to make it filter out paths outside the narrowspec. When
I changed to ctx1.status(ctx2), then that filtering obviously got
lost. ctx.status() seems like a better method to do the filtering in,
so this patch moves the filtering into that method, thereby also
moving it out of the extension and into core.

Differential Revision: https://phab.mercurial-scm.org/D4068

--- a/hgext/narrow/narrowrepo.py	Tue Jul 10 20:23:55 2018 +0530
+++ b/hgext/narrow/narrowrepo.py	Thu Aug 02 23:50:47 2018 -0700
@@ -11,7 +11,6 @@
     changegroup,
     hg,
     narrowspec,
-    scmutil,
 )
 
 from . import (
@@ -46,23 +45,6 @@
             narrowrevlog.makenarrowfilelog(fl, self.narrowmatch())
             return fl
 
-        # I'm not sure this is the right place to do this filter.
-        # context._manifestmatches() would probably be better, or perhaps
-        # move it to a later place, in case some of the callers do want to know
-        # which directories changed. This seems to work for now, though.
-        def status(self, *args, **kwargs):
-            s = super(narrowrepository, self).status(*args, **kwargs)
-            narrowmatch = self.narrowmatch()
-            modified = list(filter(narrowmatch, s.modified))
-            added = list(filter(narrowmatch, s.added))
-            removed = list(filter(narrowmatch, s.removed))
-            deleted = list(filter(narrowmatch, s.deleted))
-            unknown = list(filter(narrowmatch, s.unknown))
-            ignored = list(filter(narrowmatch, s.ignored))
-            clean = list(filter(narrowmatch, s.clean))
-            return scmutil.status(modified, added, removed, deleted, unknown,
-                                  ignored, clean)
-
         def _makedirstate(self):
             dirstate = super(narrowrepository, self)._makedirstate()
             return narrowdirstate.wrapdirstate(self, dirstate)

--- a/mercurial/context.py	Tue Jul 10 20:23:55 2018 +0530
+++ b/mercurial/context.py	Thu Aug 02 23:50:47 2018 -0700
@@ -372,6 +372,10 @@
                 for rfiles, sfiles in zip(r, s):
                     rfiles.extend("%s/%s" % (subpath, f) for f in sfiles)
 
+        narrowmatch = self._repo.narrowmatch()
+        if not narrowmatch.always():
+            for l in r:
+                l[:] = list(filter(narrowmatch, l))
         for l in r:
             l.sort()