Working implementation of git_submodule_status

This is a big redesign of the git_submodule_status API and the
implementation of the redesigned API.  It also fixes a number of
bugs that I found in other parts of the submodule API while
writing the tests for the status part.

This also fixes a couple of bugs in the iterators that had not
been noticed before - one with iterating when there is a gitlink
(i.e. separate-work-dir) and one where I was treating anything
even vaguely submodule-like as a submodule, more aggressively
than core git does.

1 files changed, 15 insertions, 0 deletions

diff --git a/include/git2/diff.h b/include/git2/diff.h
index 79ef7a49b..088e1ecfa 100644
--- a/include/git2/diff.h
+++ b/include/git2/diff.h
@@ -391,6 +391,21 @@ GIT_EXTERN(int) git_diff_print_patch(
 	void *cb_data,
 	git_diff_data_fn print_cb);
 
+/**
+ * Query how many diff records are there in a diff list.
+ *
+ * You can optionally pass in a `git_delta_t` value if you want a count
+ * of just entries that match that delta type, or pass -1 for all delta
+ * records.
+ *
+ * @param diff A git_diff_list generated by one of the above functions
+ * @param delta_t A git_delta_t value to filter the count, or -1 for all records
+ * @return Count of number of deltas matching delta_t type
+ */
+GIT_EXTERN(int) git_diff_entrycount(
+	git_diff_list *diff,
+	int delta_t);
+
 /**@}*/