dir: break part of read_directory_recursive() out for reuse

Create an add_path_to_appropriate_result_list() function from the code
at the end of read_directory_recursive() so we can use it elsewhere.

Signed-off-by: Elijah Newren <newren@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

dir.c

@@ -1932,6 +1932,40 @@ static void close_cached_dir(struct cached_dir *cdir)
 	}
 }
 
+static void add_path_to_appropriate_result_list(struct dir_struct *dir,
+	struct untracked_cache_dir *untracked,
+	struct cached_dir *cdir,
+	struct index_state *istate,
+	struct strbuf *path,
+	int baselen,
+	const struct pathspec *pathspec,
+	enum path_treatment state)
+{
+	/* add the path to the appropriate result list */
+	switch (state) {
+	case path_excluded:
+		if (dir->flags & DIR_SHOW_IGNORED)
+			dir_add_name(dir, istate, path->buf, path->len);
+		else if ((dir->flags & DIR_SHOW_IGNORED_TOO) ||
+			((dir->flags & DIR_COLLECT_IGNORED) &&
+			exclude_matches_pathspec(path->buf, path->len,
+						 pathspec)))
+			dir_add_ignored(dir, istate, path->buf, path->len);
+		break;
+
+	case path_untracked:
+		if (dir->flags & DIR_SHOW_IGNORED)
+			break;
+		dir_add_name(dir, istate, path->buf, path->len);
+		if (cdir->fdir)
+			add_untracked(untracked, path->buf + baselen);
+		break;
+
+	default:
+		break;
+	}
+}
+
 /*
  * Read a directory tree. We currently ignore anything but
  * directories, regular files and symlinks. That's because git
@@ -2035,29 +2069,9 @@ static enum path_treatment read_directory_recursive(struct dir_struct *dir,
 			continue;
 		}
 
-		/* add the path to the appropriate result list */
-		switch (state) {
-		case path_excluded:
-			if (dir->flags & DIR_SHOW_IGNORED)
-				dir_add_name(dir, istate, path.buf, path.len);
-			else if ((dir->flags & DIR_SHOW_IGNORED_TOO) ||
-				((dir->flags & DIR_COLLECT_IGNORED) &&
-				exclude_matches_pathspec(path.buf, path.len,
-							 pathspec)))
-				dir_add_ignored(dir, istate, path.buf, path.len);
-			break;
-
-		case path_untracked:
-			if (dir->flags & DIR_SHOW_IGNORED)
-				break;
-			dir_add_name(dir, istate, path.buf, path.len);
-			if (cdir.fdir)
-				add_untracked(untracked, path.buf + baselen);
-			break;
-
-		default:
-			break;
-		}
+		add_path_to_appropriate_result_list(dir, untracked, &cdir,
+						    istate, &path, baselen,
+						    pathspec, state);
 	}
 	close_cached_dir(&cdir);
  out: