Re: Passing and retrieveing a variable

[luigi scarso <luigi.scarso@gmail.com>]

2011/1/7 Procházka Lukáš Ing. - Pontex s. r. o. <LPr@pontex.cz>:
> Hello,
>
> I created a testing file which tests existence and type of
> (tex|context|document).(modes|arguments|variables) by Lua - see the
> attachments.
>
> It seems that:
>
> - Modes are accessible by tex.modes[<a-mode>].
>
> - - tex.modes are 'false' by default. I.e. they are not 'nil' but 'false',
> even if not specified on the command line. (tex.mode.__newindex predefined
> to this purpose?)
>
> - There is no table of arguments or variables being passed by
> --arguments="ARG=arg" or by --variable="VAR=var" from the command line.
>
> - All arguments passed to the command line are accessible by
> document.arguments. Unfortunately, when repeating an arg, only the last is
> accessible, e.g.
>
>        context.exe t.mkiv --arguments="ARG1=arg1" --arguments="ARG2=arg2"
>
>  will cause that only (string) "ARG2=arg2" will be in
> document.arguments.arguments.
>
> - - That means also that not splitting to key-value pair is not performed by
> default (document.arguments.arguments is still "ARG2=arg2", no splitting to
> document.arguments.arguments.ARG2 to be "arg2" is not done).
>
> - Not only predefined options/switches, but all args passed by command line
> are accessible by document.arguments. I.e. it's possible to call
>
>        context.exe t.mkiv --myvar=MYVAR
>
>  and later it's possible to get "MYVAR" from document.arguments.myvar.
>
> Let's check the call:
>
>        context.exe t.mkiv --arguments=AAA=aaa --mode=MMM --arguments=BBB=bbb
> --myvar=MYVAR
>
> Best regards,
>
> Lukas
>
>
> On Wed, 05 Jan 2011 21:11:51 +0100, Peter Münster <pmlists@free.fr> wrote:
>
>> Procházka Lukáš <lpr@pontex.cz> writes:
>>
>>> I'd need to pass a variable to Ctx and to retrieve it inside a
>>> compiled document - via Ctx itself and also by Lua.
>>
>> Hello,
>>
>> % cmd-line: context --arguments=testvar=my-value test
>> \starttext
>> value of testvar: \env{testvar}
>>
>> with lua: \ctxlua{tex.print(document.arguments.arguments)}
>> \stoptext
>>
>> There is perhaps a nicer solution in lua.
>>
>> Peter
>>
>
>
> --
> Ing. Lukáš Procházka [mailto:LPr@pontex.cz]
> Pontex s. r. o.      [mailto:pontex@pontex.cz] [http://www.pontex.cz]
> Bezová 1658
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>
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>
Maybe Data Description can here here
http://www.lua.org/pil/10.1.html

-- 
luigi
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