Stop with an error signal

Stop with an error signal

[Aditya Mahajan]

Hi,

I want to write a macro that checks for some settings and if the settings 
are wrong stop the current compilation and terminate with an error 
message. Right now I have

\def\ERROR
       {\writeline
        \showmessage\??externalfilter??{forbidden}\getexternalfilterdirectory
        \batchmode
        \normalend}

This prints the error message on the terminal and exits. However the exit 
status (the value of $?) is 0, if the tui file has changed the document is 
compiled a second time anyways.

How can I force context (the macro package) to exit with a status of 1 so 
that context (the program) does not attempt a second compilation?

Thanks.

Aditya
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___________________________________________________________________________________

Re: Stop with an error signal

[Wolfgang Schuster]

Am 31.10.2010 um 01:27 schrieb Aditya Mahajan:

> Hi,
> 
> I want to write a macro that checks for some settings and if the settings are wrong stop the current compilation and terminate with an error message. Right now I have
> 
> \def\ERROR
>      {\writeline
>       \showmessage\??externalfilter??{forbidden}\getexternalfilterdirectory
>       \batchmode
>       \normalend}
> 
> This prints the error message on the terminal and exits. However the exit status (the value of $?) is 0, if the tui file has changed the document is compiled a second time anyways.
> 
> How can I force context (the macro package) to exit with a status of 1 so that context (the program) does not attempt a second compilation?

\starttext

one

\scrollmode\undefined\forcequitjob{bye}

two

\stoptext

Wolfgang

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___________________________________________________________________________________

Re: Stop with an error signal

[Aditya Mahajan]

On Sun, 31 Oct 2010, Wolfgang Schuster wrote:

>
> Am 31.10.2010 um 01:27 schrieb Aditya Mahajan:
>
>> Hi,
>>
>> I want to write a macro that checks for some settings and if the settings are wrong stop the current compilation and terminate with an error message. Right now I have
>>
>> \def\ERROR
>>      {\writeline
>>       \showmessage\??externalfilter??{forbidden}\getexternalfilterdirectory
>>       \batchmode
>>       \normalend}
>>
>> This prints the error message on the terminal and exits. However the exit status (the value of $?) is 0, if the tui file has changed the document is compiled a second time anyways.
>>
>> How can I force context (the macro package) to exit with a status of 1 so that context (the program) does not attempt a second compilation?
>
> \starttext
>
> one
>
> \scrollmode\undefined\forcequitjob{bye}
>
> two
>
> \stoptext

\forcequitjob is defined in the same manner as my definition

\def\forcequitjob#1%
   {\writestatus\m!systems{forcing quit: #1}%
    \batchmode
    \dorecurse\textlevel{\stoptext}
    \normalend}

and suffers from the same problem. It does not send the program's error 
code to 1. After compiling

\starttext
\forcequitjob{bye}
\stoptext

the output of `echo $?` is 0, so context thinks that the program compiled 
sucessfully.

Now add

\section{one}

on the first line and compile again. Context does two runs of the program 
(because no error signal is generated at the end of the first run). I want 
to avoid this second run.

Aditya
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___________________________________________________________________________________

Re: Stop with an error signal

[Aditya Mahajan]

On Sun, 31 Oct 2010, Aditya Mahajan wrote:

>>> How can I force context (the macro package) to exit with a status of 1 so 
>>> that context (the program) does not attempt a second compilation?

Adding \errmessage{} before \normalend changes the error code to 1.

Aditya
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Re: Stop with an error signal

[Khaled Hosny]

On Sat, Oct 30, 2010 at 07:27:02PM -0400, Aditya Mahajan wrote:
> Hi,
> 
> I want to write a macro that checks for some settings and if the
> settings are wrong stop the current compilation and terminate with
> an error message. Right now I have
> 
> \def\ERROR
>       {\writeline
>        \showmessage\??externalfilter??{forbidden}\getexternalfilterdirectory
>        \batchmode
>        \normalend}

Well, the first thought that came in my mind is using os.exit(1):

 \def\ERROR{\directlua{os.exit(1)}}

But since this is pretty obvious, I'm sure I'm missing something.

Regards,
 Khaled

-- 
 Khaled Hosny
 Arabic localiser and member of Arabeyes.org team
 Free font developer
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___________________________________________________________________________________

Re: Stop with an error signal

[Aditya Mahajan]

On Sun, 31 Oct 2010, Khaled Hosny wrote:

> On Sat, Oct 30, 2010 at 07:27:02PM -0400, Aditya Mahajan wrote:
>> Hi,
>>
>> I want to write a macro that checks for some settings and if the
>> settings are wrong stop the current compilation and terminate with
>> an error message. Right now I have
>>
>> \def\ERROR
>>       {\writeline
>>        \showmessage\??externalfilter??{forbidden}\getexternalfilterdirectory
>>        \batchmode
>>        \normalend}
>
> Well, the first thought that came in my mind is using os.exit(1):
>
> \def\ERROR{\directlua{os.exit(1)}}
>
> But since this is pretty obvious, I'm sure I'm missing something.

I want the code to also work with MkII, so I did not even think of a lua 
solution :)

Aditya
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___________________________________________________________________________________

Re: Stop with an error signal

[Khaled Hosny]

On Sun, Oct 31, 2010 at 01:08:40AM -0400, Aditya Mahajan wrote:
> On Sun, 31 Oct 2010, Khaled Hosny wrote:
> 
> >On Sat, Oct 30, 2010 at 07:27:02PM -0400, Aditya Mahajan wrote:
> >>Hi,
> >>
> >>I want to write a macro that checks for some settings and if the
> >>settings are wrong stop the current compilation and terminate with
> >>an error message. Right now I have
> >>
> >>\def\ERROR
> >>      {\writeline
> >>       \showmessage\??externalfilter??{forbidden}\getexternalfilterdirectory
> >>       \batchmode
> >>       \normalend}
> >
> >Well, the first thought that came in my mind is using os.exit(1):
> >
> >\def\ERROR{\directlua{os.exit(1)}}
> >
> >But since this is pretty obvious, I'm sure I'm missing something.
> 
> I want the code to also work with MkII, so I did not even think of a
> lua solution :)

For some reason I was assuming the external filter module is MkIV only
thing, now I wounder from where I got that impression.

Regards,
 Khaled

-- 
 Khaled Hosny
 Arabic localiser and member of Arabeyes.org team
 Free font developer
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___________________________________________________________________________________

Re: Stop with an error signal

[Aditya Mahajan]

On Sun, 31 Oct 2010, Khaled Hosny wrote:

> On Sun, Oct 31, 2010 at 01:08:40AM -0400, Aditya Mahajan wrote:
>> On Sun, 31 Oct 2010, Khaled Hosny wrote:
>>
>>> On Sat, Oct 30, 2010 at 07:27:02PM -0400, Aditya Mahajan wrote:
>>>> Hi,
>>>>
>>>> I want to write a macro that checks for some settings and if the
>>>> settings are wrong stop the current compilation and terminate with
>>>> an error message. Right now I have
>>>>
>>>> \def\ERROR
>>>>      {\writeline
>>>>       \showmessage\??externalfilter??{forbidden}\getexternalfilterdirectory
>>>>       \batchmode
>>>>       \normalend}
>>>
>>> Well, the first thought that came in my mind is using os.exit(1):
>>>
>>> \def\ERROR{\directlua{os.exit(1)}}
>>>
>>> But since this is pretty obvious, I'm sure I'm missing something.
>>
>> I want the code to also work with MkII, so I did not even think of a
>> lua solution :)
>
> For some reason I was assuming the external filter module is MkIV only
> thing, now I wounder from where I got that impression.

I had some functionality (running content through webservers) that was 
MkIV only, but I decided to remove that. Maybe that is what give you the 
MkIV only imression.

Aditya
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___________________________________________________________________________________

Re: Stop with an error signal

[Wolfgang Schuster]

Am 31.10.2010 um 01:27 schrieb Aditya Mahajan:

> Hi,
> 
> I want to write a macro that checks for some settings and if the settings are wrong stop the current compilation and terminate with an error message. Right now I have
> 
> \def\ERROR
>      {\writeline
>       \showmessage\??externalfilter??{forbidden}\getexternalfilterdirectory
>       \batchmode
>       \normalend}
> 
> This prints the error message on the terminal and exits. However the exit status (the value of $?) is 0, if the tui file has changed the document is compiled a second time anyways.
> 
> How can I force context (the macro package) to exit with a status of 1 so that context (the program) does not attempt a second compilation?

\starttext
\scrollmode\errmessage{...}
\stoptext

Wolfgang

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___________________________________________________________________________________