Re: Using Product-component

[Hans Hagen <pragma@wxs.nl>]

On 4/16/2013 5:25 PM, Aditya Mahajan wrote:
> On Tue, 16 Apr 2013, Wolfgang Schuster wrote:
>
>>
>> Am 16.04.2013 um 09:32 schrieb Aditya Mahajan <adityam@umich.edu>:
>>
>>> Has something changed recently on how product-component structure is
>>> supposed to
>>> be used? I have three files:
>>>
>>> 1. prd.tex
>>>
>>>    \environment env
>>>
>>>    \startproduct prd
>>>
>>>    \component cmp
>>>
>>>    \stopproduct
>>>
>>> 2. env.tex
>>>
>>>
>>>    \startenvironment env
>>>
>>>    \define\testing{This is a test}
>>>
>>>    \stopenvironment
>>>
>>> 3. cmp.tex
>>>
>>>
>>>    \product prd
>>>
>>>    \startcomponent cmp
>>>
>>>    Testing \testing
>>>
>>>    \stopcomponent
>>>
>>> When I compile cmp.tex, I get:
>>>
>>> %--------------------------%<-----------------------------
>>> […]
>>> mtx-context     | fatal error: return code: 1%
>>> %--------------------------%<-----------------------------
>>>
>>> Shouldn't the product file not load the component file (or anything
>>> else inside
>>> \startproduct .. \stopproduct) when compiling a component?
>>
>> The product file loads the component but this isn’t what you’re doing.
>>
>> You process the component which doesn’t load product file because this
>> would end in a loop
>> because the product would then again load the component etc.
>>
>> Add “\environment env” at the begin of your component file and the
>> problem disappears.
>> Since environment files are loaded only once it doesn’t matter when
>> the line is in each
>> component file.
>
> I thought that the whole point of adding `\product ...` in a component
> file was so that I do not have to add all the `\environment ...` in the
> component file.
>
> Actually, if I change the product -> component then everything works as
> expected, so perhaps I did not remember correctly how the
> project-product-component hierarchy is to be used. I thought that the
> project part was optional, but it seems that one must include a project
> as well (if you want not to add all the environments in the component file)

see core-job.lua ... around line 435 ... there we define what gets done 
once, many times, never

Hans


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