# HG changeset patch
# User Matt Harbison <matt_harbison@yahoo.com>
# Date 1438909216 14400
# Node ID 9ac4e81b96592fb4611860a446bbe6ff91b7ee73
# Parent  d4e1e947444b81a9e0a7d5dc7bfa282b38d00b94
match: fix a caseonly rename + explicit path commit on icasefs (issue4768)

The problem was that the former name and the new name are both normalized to the
case in dirstate, so matcher._files would be ['ABC.txt', 'ABC.txt'].
localrepo.commit() calls localrepo.status(), passing along the matcher.  Inside
dirstate.status(), _walkexplicit() simply grabs matcher.files() and processes
those items.  Since the old name isn't present, it is silently dropped.  There's
a fundamental tension here, because the status command should also accept files
that don't match the filesystem, so we can't drop the normalization in status.
The problem originated in baa11dde8c0e.

Unfortunately with this change, the case of the old file must still be specified
exactly, or the old file is again silently excluded.  I went back to
baa11dde8c0e^, and that had the same behavior, so we are no worse off.  I'm open
to ideas from a matcher or dirstate expert on how to fix that half.

diff -r d4e1e947444b -r 9ac4e81b9659 mercurial/match.py
--- a/mercurial/match.py	Thu Aug 06 17:21:46 2015 -0700
+++ b/mercurial/match.py	Thu Aug 06 21:00:16 2015 -0400
@@ -386,7 +386,8 @@
     def __init__(self, root, cwd, patterns, include, exclude, default, auditor,
                  ctx, listsubrepos=False, badfn=None):
         init = super(icasefsmatcher, self).__init__
-        self._dsnormalize = ctx.repo().dirstate.normalize
+        self._dirstate = ctx.repo().dirstate
+        self._dsnormalize = self._dirstate.normalize
 
         init(root, cwd, patterns, include, exclude, default, auditor=auditor,
              ctx=ctx, listsubrepos=listsubrepos, badfn=badfn)
@@ -402,7 +403,13 @@
         kindpats = []
         for kind, pats, source in self._kp:
             if kind not in ('re', 'relre'):  # regex can't be normalized
+                p = pats
                 pats = self._dsnormalize(pats)
+
+                # Preserve the original to handle a case only rename.
+                if p != pats and p in self._dirstate:
+                    kindpats.append((kind, p, source))
+
             kindpats.append((kind, pats, source))
         return kindpats
 
diff -r d4e1e947444b -r 9ac4e81b9659 tests/test-add.t
--- a/tests/test-add.t	Thu Aug 06 17:21:46 2015 -0700
+++ b/tests/test-add.t	Thu Aug 06 21:00:16 2015 -0400
@@ -232,9 +232,17 @@
   -xyz
   +def
 
+  $ hg mv CapsDir1/CapsDir/abc.txt CapsDir1/CapsDir/ABC.txt
+  moving CapsDir1/CapsDir/AbC.txt to CapsDir1/CapsDir/ABC.txt (glob)
+  $ hg ci -m "case changing rename" CapsDir1/CapsDir/AbC.txt CapsDir1/CapsDir/ABC.txt
+
+  $ hg status -A capsdir1/capsdir
+  M CapsDir1/CapsDir/SubDir/Def.txt
+  C CapsDir1/CapsDir/ABC.txt
+
   $ hg remove -f 'glob:**.txt' -X capsdir1/capsdir
   $ hg remove -f 'glob:**.txt' -I capsdir1/capsdir
-  removing CapsDir1/CapsDir/AbC.txt (glob)
+  removing CapsDir1/CapsDir/ABC.txt (glob)
   removing CapsDir1/CapsDir/SubDir/Def.txt (glob)
 #endif