largefiles: introduce basic debugstate --large functionality

Very useful for debugging largefiles "performance" issues.

This is used for testing 03faf12fbee7.

hgext/largefiles/lfcommands.py

@@ -383,6 +383,13 b' def verifylfiles(ui, repo, all=False, co'
     store = basestore._openstore(repo)
     return store.verify(revs, contents=contents)
 
+def debugdirstate(ui, repo):
+    '''Show basic information for the largefiles dirstate'''
+    lfdirstate = lfutil.openlfdirstate(ui, repo)
+    for file_, ent in sorted(lfdirstate._map.iteritems()):
+        mode = '%3o' % (ent[1] & 0777 & ~util.umask)
+        ui.write("%c %s %10d %s\n" % (ent[0], mode, ent[2], file_))
+
 def cachelfiles(ui, repo, node, filelist=None):
     '''cachelfiles ensures that all largefiles needed by the specified revision
     are present in the repository's largefile cache.

hgext/largefiles/overrides.py

@@ -256,6 +256,13 b' def overrideverify(orig, ui, repo, *pats'
         result = result or lfcommands.verifylfiles(ui, repo, all, contents)
     return result
 
+def overridedebugstate(orig, ui, repo, *pats, **opts):
+    large = opts.pop('large', False)
+    if large:
+        lfcommands.debugdirstate(ui, repo)
+    else:
+        orig(ui, repo, *pats, **opts)
+
 # Override needs to refresh standins so that update's normal merge
 # will go through properly. Then the other update hook (overriding repo.update)
 # will get the new files. Filemerge is also overridden so that the merge

hgext/largefiles/uisetup.py

@@ -59,6 +59,11 b' def uisetup(ui):'
                      _('verify largefile contents not just existence'))]
     entry[1].extend(verifyopt)
 
+    entry = extensions.wrapcommand(commands.table, 'debugstate',
+                                   overrides.overridedebugstate)
+    debugstateopt = [('', 'large', None, _('display largefiles dirstate'))]
+    entry[1].extend(debugstateopt)
+
     entry = extensions.wrapcommand(commands.table, 'outgoing',
         overrides.overrideoutgoing)
     outgoingopt = [('', 'large', None, _('display outgoing largefiles'))]

tests/test-largefiles.t

@@ -17,8 +17,8 b''
   > EOF
 
 Create the repo with a couple of revisions of both large and normal
-files, testing that status correctly shows largefiles and that summary output
-is correct.
+files.
+Test status and dirstate of largefiles and that summary output is correct.
 
   $ hg init a
   $ cd a
@@ -35,6 +35,17 b' is correct.'
   A normal1
   A sub/large2
   A sub/normal2
+  $ touch large1 sub/large2
+  $ sleep 1
+  $ hg st
+  $ hg debugstate --nodates
+  n 644         41 .hglf/large1
+  n 644         41 .hglf/sub/large2
+  n 644          8 normal1
+  n 644          8 sub/normal2
+  $ hg debugstate --large
+  n 644          7 large1
+  n 644          7 sub/large2
   $ echo normal11 > normal1
   $ echo normal22 > sub/normal2
   $ echo large11 > large1