Merge branch 'jk/format-patch-ignore-noprefix'

"git format-patch" honors the src/dst prefixes set to nonstandard
values with configuration variables like "diff.noprefix", causing
receiving end of the patch that expects the standard -p1 format to
break.  Teach "format-patch" to ignore end-user configuration and
always use the standard prefixes.

This is a backward compatibility breaking change.

* jk/format-patch-ignore-noprefix:
  rebase: prefer --default-prefix to --{src,dst}-prefix for format-patch
  format-patch: add format.noprefix option
  format-patch: do not respect diff.noprefix
  diff: add --default-prefix option
  t4013: add tests for diff prefix options
  diff: factor out src/dst prefix setup

1 files changed, 2 insertions, 0 deletions

diff --git a/diff.h b/diff.h
index 3520119b00..09627f6e84 100644
--- a/diff.h
+++ b/diff.h
@@ -496,6 +496,8 @@ void diff_tree_combined(const struct object_id *oid, const struct oid_array *par
 void diff_tree_combined_merge(const struct commit *commit, struct rev_info *rev);
 
 void diff_set_mnemonic_prefix(struct diff_options *options, const char *a, const char *b);
+void diff_set_noprefix(struct diff_options *options);
+void diff_set_default_prefix(struct diff_options *options);
 
 int diff_can_quit_early(struct diff_options *);