Introduce `git_diff_to_buf`

Like `git_patch_to_buf`, provide a simple helper method that can
print an entire diff directory to a `git_buf`.

1 files changed, 15 insertions, 0 deletions

diff --git a/include/git2/diff.h b/include/git2/diff.h
index 880292a1f..005b33965 100644
--- a/include/git2/diff.h
+++ b/include/git2/diff.h
@@ -1054,6 +1054,21 @@ GIT_EXTERN(int) git_diff_print(
 	git_diff_line_cb print_cb,
 	void *payload);
 
+/**
+ * Produce the complete formatted text output from a diff into a
+ * buffer.
+ *
+ * @param out A pointer to a user-allocated git_buf that will
+ *            contain the diff text
+ * @param diff A git_diff generated by one of the above functions.
+ * @param format A git_diff_format_t value to pick the text format.
+ * @return 0 on success or error code
+ */
+GIT_EXTERN(int) git_diff_to_buf(
+	git_buf *out,
+	git_diff *diff,
+	git_diff_format_t format);
+
 /**@}*/