Merge branch 'jk/no-looking-at-dotgit-outside-repo'

Update "git diff --no-index" codepath not to try to peek into .git/
directory that happens to be under the current directory, when we
know we are operating outside any repository.

* jk/no-looking-at-dotgit-outside-repo:
  diff: handle sha1 abbreviations outside of repository
  diff_aligned_abbrev: use "struct oid"
  diff_unique_abbrev: rename to diff_aligned_abbrev
  find_unique_abbrev: use 4-buffer ring
  test-*-cache-tree: setup git dir
  read info/{attributes,exclude} only when in repository

1 files changed, 5 insertions, 1 deletions

diff --git a/diff.h b/diff.h
index 25ae60d5ff..01afc70bd5 100644
--- a/diff.h
+++ b/diff.h
@@ -340,7 +340,11 @@ extern void diff_warn_rename_limit(const char *varname, int needed, int degraded
 #define DIFF_STATUS_FILTER_AON		'*'
 #define DIFF_STATUS_FILTER_BROKEN	'B'
 
-extern const char *diff_unique_abbrev(const unsigned char *, int);
+/*
+ * This is different from find_unique_abbrev() in that
+ * it stuffs the result with dots for alignment.
+ */
+extern const char *diff_aligned_abbrev(const struct object_id *sha1, int);
 
 /* do not report anything on removed paths */
 #define DIFF_SILENT_ON_REMOVED 01