patch: stop updating changed files set in applydiff()

patch: stop updating changed files set in applydiff()

This information is more correctly returned by backends.

The extra updated file removed from test-mq-merge.t output came from changes
from git patches being counted before being really applied in some cases.

--- a/mercurial/patch.py	Sat Jun 11 14:14:11 2011 +0200
+++ b/mercurial/patch.py	Sat Jun 11 14:14:13 2011 +0200
@@ -1193,21 +1193,20 @@
         gp = gitpatches.pop()[2]
         yield 'file', ('a/' + gp.path, 'b/' + gp.path, None, gp)
 
-def applydiff(ui, fp, changed, backend, store, strip=1, eolmode='strict'):
+def applydiff(ui, fp, backend, store, strip=1, eolmode='strict'):
     """Reads a patch from fp and tries to apply it.
 
-    The dict 'changed' is filled in with all of the filenames changed
-    by the patch. Returns 0 for a clean patch, -1 if any rejects were
-    found and 1 if there was any fuzz.
+    Returns 0 for a clean patch, -1 if any rejects were found and 1 if
+    there was any fuzz.
 
     If 'eolmode' is 'strict', the patch content and patched file are
     read in binary mode. Otherwise, line endings are ignored when
     patching then normalized according to 'eolmode'.
     """
-    return _applydiff(ui, fp, patchfile, backend, store, changed, strip=strip,
+    return _applydiff(ui, fp, patchfile, backend, store, strip=strip,
                       eolmode=eolmode)
 
-def _applydiff(ui, fp, patcher, backend, store, changed, strip=1,
+def _applydiff(ui, fp, patcher, backend, store, strip=1,
                eolmode='strict'):
 
     def pstrip(p):
@@ -1222,10 +1221,8 @@
             if not current_file:
                 continue
             ret = current_file.apply(values)
-            if ret >= 0:
-                changed.add(current_file.fname)
-                if ret > 0:
-                    err = 1
+            if ret > 0:
+                err = 1
         elif state == 'file':
             if current_file:
                 rejects += current_file.close()
@@ -1236,7 +1233,6 @@
                 path = pstrip(gp.path)
                 if gp.oldpath:
                     copysource = pstrip(gp.oldpath)
-                changed.add(path)
                 if gp.op == 'RENAME':
                     backend.unlink(copysource)
                 if not first_hunk:
@@ -1354,7 +1350,7 @@
     except TypeError:
         fp = patchobj
     try:
-        ret = applydiff(ui, fp, files, backend, store, strip=strip,
+        ret = applydiff(ui, fp, backend, store, strip=strip,
                         eolmode=eolmode)
     finally:
         if fp != patchobj:

--- a/tests/test-mq-merge.t	Sat Jun 11 14:14:11 2011 +0200
+++ b/tests/test-mq-merge.t	Sat Jun 11 14:14:13 2011 +0200
@@ -130,7 +130,7 @@
   patch failed, unable to continue (try -v)
   patch failed, rejects left in working dir
   patch didn't work out, merging patcha
-  1 files updated, 0 files merged, 1 files removed, 0 files unresolved
+  0 files updated, 0 files merged, 1 files removed, 0 files unresolved
   0 files updated, 2 files merged, 0 files removed, 0 files unresolved
   (branch merge, don't forget to commit)
   applying patcha2