[TYPO3-english] Set PageTSConfig in ext_tables.php by condition read from extension settings

[Jan Kornblum]

Hi all!

i need to set some PageTSConfig by a condition, the condition itself 
should be read from extension settings (or setup / constants).

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Approach 1 (TSConfig code):

[PIDinRootline = {VALUE_READ_FROM_EXTENSION_SETTINGS}]
   ...
[end]

How to pass extension settings into tsconfig? Impossible?

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Approach 2 (directly in ext_tables.php):

if ("PID IN ROOTLINE" == {VALUE_READ_FROM_EXTENSION_SETTINGS}) {
   ExtensionManagementUtility::addPageTSConfig('...')
}

Extension settings would be available here. But can 
addPageTSConfig('...') be put into an if-statement? And how to get the 
"PID IN ROOTLINE" behaviour in this case?

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Looking forward to get some inspirations ;)

Kind reagards, Jan