# HG changeset patch
# User Patrick Mezard <patrick@mezard.eu>
# Date 1338565076 -7200
# Node ID 6d42c797ca6e36ad4d6e20edc9162144c06f44c8
# Parent  9a99224a6409b80be7ff5c653c308dfda16ae4b2
patch: keep patching after missing copy source (issue3480)

When applying a patch renaming/copying 'a' to 'b' on a revision where
'a' does not exist, the patching process would abort immediately,
without processing the remaining hunks and without reporting it. This
patch makes the patching no longer abort and possible hunks applied on
the copied/renamed file be written in reject files.

diff -r 9a99224a6409 -r 6d42c797ca6e mercurial/patch.py
--- a/mercurial/patch.py	Tue May 29 18:27:12 2012 +0300
+++ b/mercurial/patch.py	Fri Jun 01 17:37:56 2012 +0200
@@ -1343,8 +1343,17 @@
         elif state == 'git':
             for gp in values:
                 path = pstrip(gp.oldpath)
-                data, mode = backend.getfile(path)
-                store.setfile(path, data, mode)
+                try:
+                    data, mode = backend.getfile(path)
+                except IOError, e:
+                    if e.errno != errno.ENOENT:
+                        raise
+                    # The error ignored here will trigger a getfile()
+                    # error in a place more appropriate for error
+                    # handling, and will not interrupt the patching
+                    # process.
+                else:
+                    store.setfile(path, data, mode)
         else:
             raise util.Abort(_('unsupported parser state: %s') % state)
 
diff -r 9a99224a6409 -r 6d42c797ca6e tests/test-mq-missingfiles.t
--- a/tests/test-mq-missingfiles.t	Tue May 29 18:27:12 2012 +0300
+++ b/tests/test-mq-missingfiles.t	Fri Jun 01 17:37:56 2012 +0200
@@ -73,6 +73,53 @@
   +c
   +c
 
+Test missing renamed file
+
+  $ hg qpop
+  popping changeb
+  patch queue now empty
+  $ hg up -qC 0
+  $ echo a > a
+  $ hg mv b bb
+  $ python ../writelines.py bb 2 'b\n' 10 'a\n' 2 'c\n'
+  $ echo c > c
+  $ hg add a c
+  $ hg qnew changebb
+  $ hg qpop
+  popping changebb
+  patch queue now empty
+  $ hg up -qC 1
+  $ hg qpush
+  applying changebb
+  patching file bb
+  Hunk #1 FAILED at 0
+  Hunk #2 FAILED at 7
+  2 out of 2 hunks FAILED -- saving rejects to file bb.rej
+  b not tracked!
+  patch failed, unable to continue (try -v)
+  patch failed, rejects left in working dir
+  errors during apply, please fix and refresh changebb
+  [2]
+  $ cat a
+  a
+  $ cat c
+  c
+  $ cat bb.rej
+  --- bb
+  +++ bb
+  @@ -1,3 +1,5 @@
+  +b
+  +b
+   a
+   a
+   a
+  @@ -8,3 +10,5 @@
+   a
+   a
+   a
+  +c
+  +c
+
   $ cd ..