[NTG-context] using command line arguments

[NTG-context] using command line arguments

[Henning Hraban Ramm]

Hi, I’m trying to use a command line argument in parameter names – color 
name in the example below, variable namespace in my actual project.
I guess I need more expansion, but where?
Or what’s the problem here?

"""
\setupbodyfont[plex,18pt]

% set \OEM to the parameter name, fall back to "fiee"
\expanded\define\OEM{\expanded\doifelsedocumentargument{OEM}{\expanded\getdocumentargument{OEM}}{fiee}}

\definecolor[col:fiee][c=1]
\definecolor[col:pragma][m=1,y=1]
\definecolor[col:black][k=1]

\starttext

\color[col:\OEM]{Company: \OEM}

\stoptext
"""

Hraban
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[NTG-context] Re: using command line arguments

[Thomas A. Schmitz]

On 28.10.24 12:18, Henning Hraban Ramm wrote:
> Hi, I’m trying to use a command line argument in parameter names – color 
> name in the example below, variable namespace in my actual project.
> I guess I need more expansion, but where?
> Or what’s the problem here?

Perhaps my approach is too simplistic, but if I had to do something like 
that, I would use modes:

\startmode [fiee]
   \definecolor [OEM] [c=1]
   \def{OEM}{fiee}
\stopmode

and for the fallback, use

\startnotallmodes [...]

then you can call from the command line with --mode=fiee and write

\color[OEM]{Company: \OEM}

But maybe your needs are more complex...

All best

Thomas
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[NTG-context] Re: using command line arguments

[Henning Hraban Ramm]

Am 28.10.24 um 13:01 schrieb Thomas A. Schmitz:
> On 28.10.24 12:18, Henning Hraban Ramm wrote:
>> Hi, I’m trying to use a command line argument in parameter names – 
>> color name in the example below, variable namespace in my actual project.
>> I guess I need more expansion, but where?
>> Or what’s the problem here?
> 
> Perhaps my approach is too simplistic, but if I had to do something like 
> that, I would use modes:
> 
> \startmode [fiee]
>    \definecolor [OEM] [c=1]
>    \def{OEM}{fiee}
> \stopmode
> 
> and for the fallback, use
> 
> \startnotallmodes [...]
> 
> then you can call from the command line with --mode=fiee and write
> 
> \color[OEM]{Company: \OEM}
> 
> But maybe your needs are more complex...

Yes, I have several arguments that I don’t want to mix into modes.

In the end, I’ll need to process some files with Lua, but for the 
prototype I’m defining groups of variables and would like to use one of 
the parameters as variable namespace. I just tried to keep the example 
simple.

Hraban
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[NTG-context] Re: using command line arguments

[Wolfgang Schuster]

Henning Hraban Ramm schrieb am 28.10.2024 um 12:18:
> Hi, I’m trying to use a command line argument in parameter names – color 
> name in the example below, variable namespace in my actual project.
> I guess I need more expansion, but where?
> Or what’s the problem here?
> 
> """
> \setupbodyfont[plex,18pt]
> 
> % set \OEM to the parameter name, fall back to "fiee"
> \expanded\define\OEM{\expanded\doifelsedocumentargument{OEM}{\expanded\getdocumentargument{OEM}}{fiee}} 

\doifelsedocumentargument{OEM}
   {\def\OEM{\getdocumentargument{OEM}}}
   {\def\OEM{fiee}}

or

\def\OEM
   {\ifempty{\getdocumentargument{OEM}}%
      fiee%
    \else
      \getdocumentargument{OEM}%
    \fi}

Wolfgang
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[NTG-context] Re: using command line arguments

[Henning Hraban Ramm]

Am 28.10.24 um 16:18 schrieb Wolfgang Schuster:
> Henning Hraban Ramm schrieb am 28.10.2024 um 12:18:
>> Hi, I’m trying to use a command line argument in parameter names – 
>> color name in the example below, variable namespace in my actual project.
>> I guess I need more expansion, but where?
>> Or what’s the problem here?
>>
>> """
>> \setupbodyfont[plex,18pt]
>>
>> % set \OEM to the parameter name, fall back to "fiee"
>> \expanded\define\OEM{\expanded\doifelsedocumentargument{OEM} 
>> {\expanded\getdocumentargument{OEM}}{fiee}} 
> 
> \doifelsedocumentargument{OEM}
>    {\def\OEM{\getdocumentargument{OEM}}}
>    {\def\OEM{fiee}}
> 
> or
> 
> \def\OEM
>    {\ifempty{\getdocumentargument{OEM}}%
>       fiee%
>     \else
>       \getdocumentargument{OEM}%
>     \fi}

Thank you, both works (of course, if you say so…).
Also in my actual project.

Can you explain why
\define\OEM{\doifelsedocumentargument{OEM}{\getdocumentargument{OEM}}{fiee}} 

doesn’t?

Hraban
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[NTG-context] Re: using command line arguments

[Wolfgang Schuster]

Henning Hraban Ramm schrieb am 28.10.2024 um 16:26:
> Am 28.10.24 um 16:18 schrieb Wolfgang Schuster:
>> Henning Hraban Ramm schrieb am 28.10.2024 um 12:18:
>>> Hi, I’m trying to use a command line argument in parameter names – 
>>> color name in the example below, variable namespace in my actual 
>>> project.
>>> I guess I need more expansion, but where?
>>> Or what’s the problem here?
>>>
>>> """
>>> \setupbodyfont[plex,18pt]
>>>
>>> % set \OEM to the parameter name, fall back to "fiee"
>>> \expanded\define\OEM{\expanded\doifelsedocumentargument{OEM} 
>>> {\expanded\getdocumentargument{OEM}}{fiee}} 
>>
>> \doifelsedocumentargument{OEM}
>>    {\def\OEM{\getdocumentargument{OEM}}}
>>    {\def\OEM{fiee}}
>>
>> or
>>
>> \def\OEM
>>    {\ifempty{\getdocumentargument{OEM}}%
>>       fiee%
>>     \else
>>       \getdocumentargument{OEM}%
>>     \fi}
> 
> Thank you, both works (of course, if you say so…).
> Also in my actual project.
> 
> Can you explain why
> \define\OEM{\doifelsedocumentargument{OEM}{\getdocumentargument{OEM}}{fiee}} 
> 
> doesn’t?

1. \define creates an unexpandable command which can't be used as name 
placeholder for \color.

%%%% begin example
\starttext

\protected\def\GELB{yellow} % \defineexpandable\GELB{...}
           \def\BLAU{blue}   %           \define\BLAU{...}

\color[\GELB]{yellow}

\color[\BLAU]{blue}

\stoptext
%%%% end example

2. The \doifelsedocumentargument command is not expandable as well which 
makes it impossible to use it to pick the correct color name within the 
argument of \color.

Wolfgang
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