dirstate: clarify the message in nonnormal checking

The previous message was quite verbose and hard to understand. The new one
should be friendlier.

Differential Revision: https://phab.mercurial-scm.org/D11382

contrib/dirstatenonnormalcheck.py

@@ -1,71 +1,81 b''
 # dirstatenonnormalcheck.py - extension to check the consistency of the
 # dirstate's non-normal map
 #
 # For most operations on dirstate, this extensions checks that the nonnormalset
 # contains the right entries.
 # It compares the nonnormal file to a nonnormalset built from the map of all
 # the files in the dirstate to check that they contain the same files.
 
 from __future__ import absolute_import
 
 from mercurial import (
     dirstate,
     extensions,
     pycompat,
 )
 
 
 def nonnormalentries(dmap):
     """Compute nonnormal entries from dirstate's dmap"""
     res = set()
     for f, e in dmap.iteritems():
         if e.state != b'n' or e.mtime == -1:
             res.add(f)
     return res
 
 
+INCONSISTENCY_MESSAGE = b"""%s call to %s
+  inconsistency in nonnormalset
+  result from dirstatemap: %s
+  expected nonnormalset:   %s
+"""
+
+
 def checkconsistency(ui, orig, dmap, _nonnormalset, label):
     """Compute nonnormalset from dmap, check that it matches _nonnormalset"""
     nonnormalcomputedmap = nonnormalentries(dmap)
     if _nonnormalset != nonnormalcomputedmap:
         b_orig = pycompat.sysbytes(repr(orig))
-        ui.develwarn(b"%s call to %s\n" % (label, b_orig), config=b'dirstate')
-        ui.develwarn(b"inconsistency in nonnormalset\n", config=b'dirstate')
         b_nonnormal = pycompat.sysbytes(repr(_nonnormalset))
-        ui.develwarn(b"[nonnormalset] %s\n" % b_nonnormal, config=b'dirstate')
         b_nonnormalcomputed = pycompat.sysbytes(repr(nonnormalcomputedmap))
-        ui.develwarn(b"[map] %s\n" % b_nonnormalcomputed, config=b'dirstate')
+        msg = INCONSISTENCY_MESSAGE % (
+            label,
+            b_orig,
+            b_nonnormal,
+            b_nonnormalcomputed,
+        )
+        ui.develwarn(msg, config=b'dirstate')
 
 
 def _checkdirstate(orig, self, *args, **kwargs):
     """Check nonnormal set consistency before and after the call to orig"""
     checkconsistency(
         self._ui, orig, self._map, self._map.nonnormalset, b"before"
     )
     r = orig(self, *args, **kwargs)
     checkconsistency(
         self._ui, orig, self._map, self._map.nonnormalset, b"after"
     )
     return r
 
 
 def extsetup(ui):
     """Wrap functions modifying dirstate to check nonnormalset consistency"""
     dirstatecl = dirstate.dirstate
     devel = ui.configbool(b'devel', b'all-warnings')
     paranoid = ui.configbool(b'experimental', b'nonnormalparanoidcheck')
     if devel:
         extensions.wrapfunction(dirstatecl, '_writedirstate', _checkdirstate)
         if paranoid:
             # We don't do all these checks when paranoid is disable as it would
             # make the extension run very slowly on large repos
             extensions.wrapfunction(dirstatecl, 'write', _checkdirstate)
             extensions.wrapfunction(dirstatecl, 'set_tracked', _checkdirstate)
             extensions.wrapfunction(dirstatecl, 'set_untracked', _checkdirstate)
             extensions.wrapfunction(
                 dirstatecl, 'set_possibly_dirty', _checkdirstate
             )
             extensions.wrapfunction(
                 dirstatecl, 'update_file_p1', _checkdirstate
             )
             extensions.wrapfunction(dirstatecl, 'update_file', _checkdirstate)