[TYPO3-dev] Defining TS setup config. via ext script

[Simon Tuck]

Hi Christopher,
> 
> If you're just talking about writing an extension that loads the TS
> and TSconfig values that you usually use, yes it's possible.  
Nope, that's not what I meant. Specifically what I'd like to do is load the defined languages from the sys_languages table and set corresponding 
language information in TS setup, e.g. config.language, config.sys_language_uid, config.locale_all, config.htmlTag_langKey etc. Usually we end 
up defining this information through conditions [globalVar = GP:L = 1] etc., with a large number of languages that is unwieldy. and anyway all 
the relevant information is in sys_languages and static_languages, so I'd hoped to be able to define these config vars via an extension. 
Unfortunately I cannot set the language vars dynamically through typoescript as the content select function automatically excludes any tables 
with the prefixes 'static_' or 'sys_' (which I find strange). Anyway, if I 'fix' that, in theory I can get the current language information from 
GP:L, for example with the following TS:

lib.currLang = CONTENT
//lib.currLang.stdWrap.debugFunc = 2
lib.currLang {
	table = static_languages
	select {
		andWhere = 1=1 OR (sys_language.static_lang_isocode = static_languages.uid AND sys_language.uid = {GPvar:L})
		andWhere.insertData = 1
		max = 1
		pidInList = 0
		join = sys_language
	}
	renderObj = TEXT
	renderObj.field = lg_iso_2
	renderObj.case = lower
}

If L=1 and the language iso code of sys_language=1 is 'de' that will give me de. Of course I'd need to expand the TS to account for L=0 (i.e. 
default language), but ultimately the approach is doomed because none of the config properties have stdWrap and I can't insert the result from 
lib.currLang.

So I tried to set these values from the ext USER_INT script, e.g. $GLOBALS['TSFE']->config['config']['htmlTag_langKey'] = 'de'
but that has no effect, or at least it has no effect on the page header.

So my question is if (a.) it's possible and I'm just missing something, or (b.) should I propose a hook in GLOBALS['TSFE']->getConfigArray(), or 
(c.) should I shut down my pc and watch the football.
Tough choices ;)
Cheers,
Simon