Function todo_list_add_exec_commands

sequencer.c:6243–6308

* Add commands after pick and (series of) squash/fixup commands * in the todo list. */

 * in the todo list.
 */
static void todo_list_add_exec_commands(struct todo_list *todo_list,
					struct string_list *commands)
{
	struct strbuf *buf = &todo_list->buf;
	size_t base_offset = buf->len;
	int i, insert, nr = 0, alloc = 0;
	struct todo_item *items = NULL, *base_items = NULL;

	CALLOC_ARRAY(base_items, commands->nr);
	for (i = 0; i < commands->nr; i++) {
		size_t command_len = strlen(commands->items[i].string);

		strbuf_addstr(buf, commands->items[i].string);
		strbuf_addch(buf, '\n');

		base_items[i].command = TODO_EXEC;
		base_items[i].offset_in_buf = base_offset;
		base_items[i].arg_offset = base_offset;
		base_items[i].arg_len = command_len;

		base_offset += command_len + 1;
	}

	/*
	 * Insert <commands> after every pick. Here, fixup/squash chains
	 * are considered part of the pick, so we insert the commands *after*
	 * those chains if there are any.
	 *
	 * As we insert the exec commands immediately after rearranging
	 * any fixups and before the user edits the list, a fixup chain
	 * can never contain comments (any comments are empty picks that
	 * have been commented out because the user did not specify
	 * --keep-empty).  So, it is safe to insert an exec command
	 * without looking at the command following a comment.
	 */
	insert = 0;
	for (i = 0; i < todo_list->nr; i++) {
		enum todo_command command = todo_list->items[i].command;
		if (insert && !is_fixup(command)) {
			ALLOC_GROW(items, nr + commands->nr, alloc);
			COPY_ARRAY(items + nr, base_items, commands->nr);
			nr += commands->nr;

			insert = 0;
		}

		ALLOC_GROW(items, nr + 1, alloc);
		items[nr++] = todo_list->items[i];

		if (command == TODO_PICK || command == TODO_MERGE)
			insert = 1;
	}

	/* insert or append final <commands> */
	if (insert) {
		ALLOC_GROW(items, nr + commands->nr, alloc);
		COPY_ARRAY(items + nr, base_items, commands->nr);
		nr += commands->nr;