Ability to send option flags to post-install script

[mrclary]

Checklist

• I added a descriptive title
• I searched open requests and couldn't find a duplicate

What is the idea?

@jaimergp,
Is there a way for the post-install script to determine whether the installer is running in silent (.exe with /S) or batch (.sh with -b) mode?

Otherwise, is it possible to implement a feature in which command-line arguments provided to the installer (.exe, .sh or .pkg) are passed to the post-install script?

Why is this needed?

For our Spyder installer, the post-install script is designed to launch Spyder automatically upon completing the install. It is desirable to forego this behavior if the Spyder installer is executed from the command-line in either batch or silent mode.

The ability to pass command-line arguments to the post-install script could provide more flexibility for developers that use the post-install script.

What should happen?

No response

Additional Context

spyder-ide/spyder#22730