Merge branch 'js/read-tree' into js/c-merge-recursive

* js/read-tree: (107 commits)
  read-tree: move merge functions to the library
  read-trees: refactor the unpack_trees() part
  tar-tree: illustrate an obscure feature better
  git.c: allow alias expansion without a git directory
  setup_git_directory_gently: do not barf when GIT_DIR is given.
  Build on Debian GNU/kFreeBSD
  Call setup_git_directory() much earlier
  Call setup_git_directory() early
  Display an error from update-ref if target ref name is invalid.
  Fix http-fetch
  t4103: fix binary patch application test.
  git-apply -R: binary patches are irreversible for now.
  Teach git-apply about '-R'
  Makefile: ssh-pull.o depends on ssh-fetch.c
  log and diff family: honor config even from subdirectories
  git-reset: detect update-ref error and report it.
  lost-found: use fsck-objects --full
  Teach git-http-fetch the --stdin switch
  Teach git-local-fetch the --stdin switch
  Make pull() support fetching multiple targets at once
  ...

1 files changed, 11 insertions, 0 deletions

diff --git a/diff.h b/diff.h
index a06f959938..2cced530fa 100644
--- a/diff.h
+++ b/diff.h
@@ -69,6 +69,17 @@ struct diff_options {
 	add_remove_fn_t add_remove;
 };
 
+enum color_diff {
+	DIFF_RESET = 0,
+	DIFF_PLAIN = 1,
+	DIFF_METAINFO = 2,
+	DIFF_FRAGINFO = 3,
+	DIFF_FILE_OLD = 4,
+	DIFF_FILE_NEW = 5,
+	DIFF_COMMIT = 6,
+};
+const char *diff_get_color(int diff_use_color, enum color_diff ix);
+
 extern const char mime_boundary_leader[];
 
 extern void diff_tree_setup_paths(const char **paths, struct diff_options *);