issue with \processaction

issue with \processaction

[Pablo Rodriguez]

Dear list,

I have the following sample:

\def\CheckUser{\cldcommand{sprint(tex.vrbcatcodes,os.resultof"whoami")}}
\def\UserNumber{\processaction[\CheckUser][ousia=>1, unknown=>user unknown]}

\starttext
This is user \CheckUser\ with number \UserNumber.
\stoptext

which gives me the following output:

    This is user ousia with number user unknown.

What am I doing wrong here?

Many thanks for your help,


Pablo
-- 
http://www.ousia.tk
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Re: issue with \processaction

[Hans Hagen]

On 3/18/2014 6:58 PM, Pablo Rodriguez wrote:
> Dear list,
>
> I have the following sample:
>
> \def\CheckUser{\cldcommand{sprint(tex.vrbcatcodes,os.resultof"whoami")}}
> \def\UserNumber{\processaction[\CheckUser][ousia=>1, unknown=>user unknown]}
>
> \starttext
> This is user \CheckUser\ with number \UserNumber.
> \stoptext
>
> which gives me the following output:
>
>      This is user ousia with number user unknown.
>
> What am I doing wrong here?
>
> Many thanks for your help,

you output vrbcatcodes strings while you test using ctx catcodesn

of course i'd use lua for all of it:

\startluacode
     local user  = ""
     local users = {
         ["oasi"] = 1,
     }
     function document.CheckUser()
         user = os.resultof("whoami")
         context.verbatim(user)
     end

     function document.UserNumber(name)
         context.verbatim(users[name or user] or 0)
     end
\stopluacode

\def\CheckUser {\ctxlua{document.CheckUser ()}}
\def\UserNumber{\ctxlua{document.UserNumber()}}

\starttext
This is user \CheckUser\ with number \UserNumber.
\stoptext


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___________________________________________________________________________________

Re: issue with \processaction

[Pablo Rodriguez]

On 03/18/2014 07:55 PM, Hans Hagen wrote:
> On 3/18/2014 6:58 PM, Pablo Rodriguez wrote:
>>
>> \def\CheckUser{\cldcommand{sprint(tex.vrbcatcodes,os.resultof"whoami")}}
>> \def\UserNumber{\processaction[\CheckUser][ousia=>1, unknown=>user unknown]}
>>
>> \starttext
>> This is user \CheckUser\ with number \UserNumber.
>> \stoptext
>>
>> What am I doing wrong here?
> 
> you output vrbcatcodes strings while you test using ctx catcodesn
> 
> of course i'd use lua for all of it:
> 
> \startluacode
>      local user  = ""
>      local users = {
>          ["oasi"] = 1,
>      }
>      function document.CheckUser()
>          user = os.resultof("whoami")
>          context.verbatim(user)
>      end
> 
>      function document.UserNumber(name)
>          context.verbatim(users[name or user] or 0)
>      end
> \stopluacode
> 
> \def\CheckUser {\ctxlua{document.CheckUser ()}}
> \def\UserNumber{\ctxlua{document.UserNumber()}}
> 
> \starttext
> This is user \CheckUser\ with number \UserNumber.
> \stoptext

Many thanks for your reply, Hans.

I’m afraid that the user doesn’t get recognized (I corrected the user
name above).

Is there no way to do it with \processaction?

Many thanks for your help,


Pablo
-- 
http://www.ousia.tk
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___________________________________________________________________________________

Re: issue with \processaction

[Wolfgang Schuster]

Am 18.03.2014 um 22:09 schrieb Pablo Rodriguez <oinos@gmx.es>:

> On 03/18/2014 07:55 PM, Hans Hagen wrote:
>> On 3/18/2014 6:58 PM, Pablo Rodriguez wrote:
>>> 
>>> \def\CheckUser{\cldcommand{sprint(tex.vrbcatcodes,os.resultof"whoami")}}
>>> \def\UserNumber{\processaction[\CheckUser][ousia=>1, unknown=>user unknown]}
>>> 
>>> \starttext
>>> This is user \CheckUser\ with number \UserNumber.
>>> \stoptext
>>> 
>>> What am I doing wrong here?
>> 
>> you output vrbcatcodes strings while you test using ctx catcodesn
>> 
>> of course i'd use lua for all of it:
>> 
>> \startluacode
>>     local user  = ""
>>     local users = {
>>         ["oasi"] = 1,
>>     }
>>     function document.CheckUser()
>>         user = os.resultof("whoami")
>>         context.verbatim(user)
>>     end
>> 
>>     function document.UserNumber(name)
>>         context.verbatim(users[name or user] or 0)
>>     end
>> \stopluacode
>> 
>> \def\CheckUser {\ctxlua{document.CheckUser ()}}
>> \def\UserNumber{\ctxlua{document.UserNumber()}}
>> 
>> \starttext
>> This is user \CheckUser\ with number \UserNumber.
>> \stoptext
> 
> Many thanks for your reply, Hans.
> 
> I’m afraid that the user doesn’t get recognized (I corrected the user
> name above).

The same applies to your examples because your test won’t work on our machines ;)

> Is there no way to do it with \processaction?

Only when you ensure the text you get from Lua has the normal cathode regime and when
you special characters like \ in the result you have to convert them to \letterbackslash etc.
which isn’t simpler than Hans solution. The advantage of Hans solution is that you don’t
have to care about expansion.

Wolfgang
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___________________________________________________________________________________

Re: issue with \processaction

[Pablo Rodriguez]

On 03/18/2014 10:40 PM, Wolfgang Schuster wrote:
> Am 18.03.2014 um 22:09 schrieb Pablo Rodriguez:
>> On 03/18/2014 07:55 PM, Hans Hagen wrote:
>>> [...]
>>> 
>>> you output vrbcatcodes strings while you test using ctx catcodesn
>>>
>>> of course i'd use lua for all of it:
>>> [...]
>> I’m afraid that the user doesn’t get recognized (I corrected the user
>> name above).
> 
> The same applies to your examples because your test won’t work on
> our machines ;)

You’re right, Wolfgang, I chose the wrong sample.

The next one (AFAIK) should work on every OS:

\startluacode
     local user  = ""
     local users = {
         ["ousia"] = 1,
     }
     function document.CheckUser()
         user = os.resultof("echo ousia")
         context.verbatim(user)
     end

     function document.UserNumber(name)
         context.verbatim(users[name or user] or 0)
     end
\stopluacode

\def\CheckUser {\ctxlua{document.CheckUser ()}}
\def\UserNumber{\ctxlua{document.UserNumber()}}

\starttext
This is user \CheckUser with number \UserNumber.
\stoptext

>> Is there no way to do it with \processaction?
> 
> Only when you ensure the text you get from Lua has the normal cathode
> regime and when you special characters like \ in the result you have
> to convert them to \letterbackslash etc. which isn’t simpler than
> Hans solution. The advantage of Hans solution is that you don’t have
> to care about expansion.

The solution from Hans is great. The only issue there is that it is much
harder to understand for me.

Since this is a minimal part in a way more complex implementation (at
least for me), I really need to use commands that I know what they do.
Pure Lua code is totally unknown to me. I don’t have any background in
programming.

This is the reason why I asked about \processaction.

Many thanks for your reply,


Pablo
-- 
http://www.ousia.tk
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___________________________________________________________________________________

Re: issue with \processaction

[Aditya Mahajan]

On Tue, 18 Mar 2014, Pablo Rodriguez wrote:

> The next one (AFAIK) should work on every OS:
>
> \startluacode
>     local user  = ""
>     local users = {
>         ["ousia"] = 1,
>     }
>     function document.CheckUser()
>         user = os.resultof("echo ousia")
>         context.verbatim(user)
>     end
>
>     function document.UserNumber(name)
>         context.verbatim(users[name or user] or 0)
>     end
> \stopluacode
>
> \def\CheckUser {\ctxlua{document.CheckUser ()}}
> \def\UserNumber{\ctxlua{document.UserNumber()}}
>
> \starttext
> This is user \CheckUser with number \UserNumber.
> \stoptext

(Untested)

Change `local user` by

~~~
userdata = userdata or {}
userdata.user = ""
~~~

and all other occurances of `user` by `userdata.user`.

Aditya
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___________________________________________________________________________________

Re: issue with \processaction

[Pablo Rodriguez]

On 03/18/2014 11:30 PM, Aditya Mahajan wrote:
> On Tue, 18 Mar 2014, Pablo Rodriguez wrote:
> 
>> The next one (AFAIK) should work on every OS:
>>
>> \startluacode
>>     local user  = ""
>>     local users = {
>>         ["ousia"] = 1,
>>     }
>>     function document.CheckUser()
>>         user = os.resultof("echo ousia")
>>         context.verbatim(user)
>>     end
>>
>>     function document.UserNumber(name)
>>         context.verbatim(users[name or user] or 0)
>>     end
>> \stopluacode
>>
>> \def\CheckUser {\ctxlua{document.CheckUser ()}}
>> \def\UserNumber{\ctxlua{document.UserNumber()}}
>>
>> \starttext
>> This is user \CheckUser with number \UserNumber.
>> \stoptext
> 
> (Untested)
> 
> Change `local user` by
> 
> ~~~
> userdata = userdata or {}
> userdata.user = ""
> ~~~
> 
> and all other occurances of `user` by `userdata.user`.

Many thanks for your reply, Aditya.

I followed your instructions, but I’m afraid that it doesn’t work.

I cannot say whether it is my fault, since this is all Greek to me.

I tried a simpler approach (my guess, I discovered the existence of
\executesystemcommand yesterday), which doesn’t work either:

\def\Checkuser{\executesystemcommand{echo rightuser > tmp-yser.txt}}
\def\CheckUser{\Checkuser\input tmp-yser.txt}
\def\UserNumber{\processaction[\CheckUser][rightuser=>1, unknown=>user
unknown]}
\starttext
This is user \CheckUser\ with number \UserNumber.
\stoptext

I don’t know why the \UserNumber command cannot process action and why
the backslash after \CheckUser is required, since it seems to add an
extra space.

What am I doing wrong in the previous example?

Many thanks for your help,


Pablo
-- 
http://www.ousia.tk
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maillist : ntg-context@ntg.nl / http://www.ntg.nl/mailman/listinfo/ntg-context
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archive  : http://foundry.supelec.fr/projects/contextrev/
wiki     : http://contextgarden.net
___________________________________________________________________________________