Function show_patch

builtin/am.c:2224–2258

}

static int show_patch(struct am_state *state, enum resume_type resume_mode)
{
	struct strbuf sb = STRBUF_INIT;
	const char *patch_path;
	int len;

	if (!is_null_oid(&state->orig_commit)) {
		struct child_process cmd = CHILD_PROCESS_INIT;

		strvec_pushl(&cmd.args, "show", oid_to_hex(&state->orig_commit),
			     "--", NULL);
		cmd.git_cmd = 1;
		return run_command(&cmd);
	}

	switch (resume_mode) {
	case RESUME_SHOW_PATCH_RAW:
		patch_path = am_path(state, msgnum(state));
		break;
	case RESUME_SHOW_PATCH_DIFF:
		patch_path = am_path(state, "patch");
		break;
	default:
		BUG("invalid mode for --show-current-patch");
	}

	len = strbuf_read_file(&sb, patch_path, 0);
	if (len < 0)
		die_errno(_("failed to read '%s'"), patch_path);

	setup_pager(the_repository);
	write_in_full(1, sb.buf, sb.len);
	strbuf_release(&sb);
	return 0;
}

/**
 * parse_options() callback that validates and sets opt->value to the