Re: log reporting?

[Hans Hagen <pragma@wxs.nl>]

On 5/2/2013 7:00 PM, Sietse Brouwer wrote:
> Hi Hans,
>
>> How do I enable the output of for example:
>>      report_typescripts("unknown library %a or %a",name_one,name_two)
>
> `logs.reporter("fonts","typescripts")` returns a function for writing
> to the log. Calling that function produces this sort of output:
>
> fonts      > typescripts > bla bla bla
>
> Sometimes calls to a reporter are wrapped in a 'only if tracker x is
> active'. This is not the case with this reporter, though. If this
> reporter is not printing anything, it's because the error condition is
> not arising, not because you didn't activate some tracker.
>
> For completeness: the wiki has more on trackers, including a list of them.
> http://wiki.contextgarden.net/Trackers

context --trackers
context --directives
context --experiments

> And this is what a reporter wrapped in a tracker looks like:
>
>      -- defining the tracker
>      local trace_casing = false
>      trackers.register("typesetters.casing", function(v) trace_casing = v end)
>
>      -- checking whether the tracker is active
>      if trace_casing then
>          report_casing("case trigger %a, instance %a, result
> %a",attr%100,div(attr,100),ok)
>      end

Klopt. En verschillende modules kunnen dezelfde tracker gebruiken (een 
ietwat complex onderliggend mechanisms zorgt er voor dat alles wordt 
gesynchroniseerd).

Men kan ook in texsmfcnf.lua dingen instellen (trackers, directives, 
experiments). Men kan die dingen op verschillende momenten instellen:

- commandline
- environment
- cnf file
- tex/lua file

in volgorde van prioriteit.

Hans

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