Function fill_commit_message

builtin/history.c:41–95

}

static int fill_commit_message(struct repository *repo,
			       const struct object_id *old_tree,
			       const struct object_id *new_tree,
			       const char *default_message,
			       const char *action,
			       struct strbuf *out)
{
	const char *path = git_path_commit_editmsg();
	const char *hint =
		_("Please enter the commit message for the %s changes."
		  " Lines starting\nwith '%s' will be ignored, and an"
		  " empty message aborts the commit.\n");
	struct wt_status s;

	strbuf_addstr(out, default_message);
	strbuf_addch(out, '\n');
	strbuf_commented_addf(out, comment_line_str, hint, action, comment_line_str);
	write_file_buf(path, out->buf, out->len);

	wt_status_prepare(repo, &s);
	FREE_AND_NULL(s.branch);
	s.ahead_behind_flags = AHEAD_BEHIND_QUICK;
	s.commit_template = 1;
	s.colopts = 0;
	s.display_comment_prefix = 1;
	s.hints = 0;
	s.use_color = 0;
	s.whence = FROM_COMMIT;
	s.committable = 1;

	s.fp = fopen(git_path_commit_editmsg(), "a");
	if (!s.fp)
		return error_errno(_("could not open '%s'"), git_path_commit_editmsg());

	wt_status_collect_changes_trees(&s, old_tree, new_tree);
	wt_status_print(&s);
	wt_status_collect_free_buffers(&s);
	string_list_clear_func(&s.change, change_data_free);

	strbuf_reset(out);
	if (launch_editor(path, out, NULL)) {
		fprintf(stderr, _("Aborting commit as launching the editor failed.\n"));
		return -1;
	}
	strbuf_stripspace(out, comment_line_str);

	cleanup_message(out, COMMIT_MSG_CLEANUP_ALL, 0);

	if (!out->len) {
		fprintf(stderr, _("Aborting commit due to empty commit message.\n"));
		return -1;
	}

	return 0;
}

enum commit_tree_flags {
	COMMIT_TREE_EDIT_MESSAGE = (1 << 0),