What is the purpose of pie.json?

[hotrush]

It is just slightly mentioned in docs so not really clear how it works or supposed to work.

Personally i expect it to work similarly to composer.json - so you can define a list of required extensions with their versions and configure options and then install them just by running pie install

[asgrim]

It is not mentioned in the docs, because it is only used internally by PIE; you should not need to touch/change any of the pie.json files

If you're looking to bulk install extensions for a project, you would ensure the extensions needed are in your PHP project's composer.json (like any other PHP dependency), and run pie install in your project;

Docs for that: https://github.com/php/pie?tab=readme-ov-file#installing-all-extensions-for-a-php-project

[hotrush]

Ok, that makes sense. Is there a way to specify configure options in composer.json file?

[asgrim]

Is there a way to specify configure options in composer.json file?

Not at the moment - configure options can only currently be specified when installing individually. This was discussed a bit this thread: #478