[dev-context] Mac installation package

[Hans Hagen]

Oliver Buerschaper wrote:
>>> Would it then be possible to have ConTeXt grind to a complete halt 
>>> once it encounters a module whose minimum requirements aren't met?
>>
>> \doifolderversionelse\contextversion{2100.01.01}\normalend\donothing
>> %\doifolderversionelse\contextversion{2009.07.01}\normalend\donothing
>>
>> \starttext
>> Hello
>> \stoptext
> 
> That's great! It's almost what I was looking for ... yet I think 
> \normalend might not be drastic enough ;-) Namely, running this example 
> with

I'll add:

\unprotect

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

\protect

\starttext
     test \forcequitjob{whatever}
\stoptext


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