[packages/libidn2] Use lua in %post scripts to break dependency loop

[glen]

On 2/19/19 2:16 PM, jajcus wrote:
> -%post
> -/sbin/ldconfig
> -[ ! -x /usr/sbin/fix-info-dir ] || /usr/sbin/fix-info-dir %{_infodir} >/dev/null 2>&1
> +%post	-p <lua>
> +os.execute("/sbin/ldconfig >/dev/null 2>&1")
> +os.execute("/usr/sbin/fix-info-dir %{_infodir} >/dev/null 2>&1")
>   
> -%postun
> -/sbin/ldconfig
> -[ ! -x /usr/sbin/fix-info-dir ] || /usr/sbin/fix-info-dir %{_infodir} >/dev/null 2>&1
> +%postun	-p <lua>
> +os.execute("/sbin/ldconfig >/dev/null 2>&1")
> +os.execute("/usr/sbin/fix-info-dir %{_infodir} >/dev/null 2>&1")
>   


the behaviour is not identical:

1. previous code did not hide ldconfig errors

2. previous code skipped invocation if /usr/sbin/fix-info-dir was missing


as you hopefully tested this, then os.execute does not trigger failure, 
but would be nice to see ldconfig errors, if any.


-- 
glen