largefiles: fix "hg status dir" missing regular files (issue3421)

largefiles status implementation attemps to rewrite the input match objects to
match the "standins" as well as the regular files. When fixing the directories
listed in match.files(), if there was related standin entry, it was kept and
the original path discarded. But directories can appear both as regular and
standin entries.

hgext/largefiles/reposetup.py

@@ -136,13 +136,22 b' def reposetup(ui, repo):'
 
                 # Create a copy of match that matches standins instead
                 # of largefiles.
-                def tostandin(file):
-                    if working:
-                        sf = lfutil.standin(file)
-                        dirstate = repo.dirstate
-                        if sf in dirstate or sf in dirstate.dirs():
-                            return sf
-                    return file
+                def tostandins(files):
+                    if not working:
+                        return files
+                    newfiles = []
+                    dirstate = repo.dirstate
+                    for f in files:
+                        sf = lfutil.standin(f)
+                        if sf in dirstate:
+                            newfiles.append(sf)
+                        elif sf in dirstate.dirs():
+                            # Directory entries could be regular or
+                            # standin, check both
+                            newfiles.extend((f, sf))
+                        else:
+                            newfiles.append(f)
+                    return newfiles
 
                 # Create a function that we can use to override what is
                 # normally the ignore matcher.  We've already checked
@@ -153,7 +162,7 b' def reposetup(ui, repo):'
                     return False
 
                 m = copy.copy(match)
-                m._files = [tostandin(f) for f in m._files]
+                m._files = tostandins(m._files)
 
                 # Get ignored files here even if we weren't asked for them; we
                 # must use the result here for filtering later

tests/test-largefiles.t

@@ -65,6 +65,21 b' Commit preserved largefile contents.'
   $ cat sub/large2
   large22
 
+Test status, subdir and unknown files
+
+  $ echo unknown > sub/unknown
+  $ hg st --all
+  ? sub/unknown
+  C large1
+  C normal1
+  C sub/large2
+  C sub/normal2
+  $ hg st --all sub
+  ? sub/unknown
+  C sub/large2
+  C sub/normal2
+  $ rm sub/unknown
+
 Remove both largefiles and normal files.
  
   $ hg remove normal1 large1