[Question] What does it mean to "Write a new installer"?

I noticed on the Lutris.net website that there is an option to “Write a new installer” for games.

What does that do exactly, and what does someone have to do to “write an installer”?

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Outside of launchers like steam or epic the installation procedure of different games is not standardised.

Some might need to execute an installer, some might need to extract a zip file etc. Since lutris tries to include the installation process into it’s ui it needs to know what to do.

Also some Windows games might need a specific wine version, or an aditional patch installed, or a specific compatibility setting.

All this information is put into an installer script. Here are some examples on how it might look like: https://github.com/lutris/lutris/blob/master/docs/installers.rst#example-scripts