Generating MegaWizard-IPs by scripts

I am used to generate my FPGA projects out of repository with scripts. I do not know how to process the IPs generated in Quartus Prime.

I have learned by doing so long:

From Quartus Prime I export the project with "Project/Generate Tcl File for Project..." -->GenPrj.tcl

This scipt can be used to restore the project structure with command line:

quartus_sh -t GenPrj.tcl

From Platform Designer I export with "File/Export System as Platform Designer script (.tcl)" -->GenCpu.tcl

This script can be used to restore the .qsys with

qsys-script --script=GenCpu.tcl

and from qsys I can generate the depending files with

qsys-generate cpu.qsys -syn

But to (re-)generate the IPs i generated in Quartus Prime from the IP-Catalog I have some problems.

With the example of the ALTPLL IP I tried to regenerate a simple pll module.

I tried the command ip-generate but than I noted that this is the qsys component.

I found mega_altpllq.exe which I do not know how to use

I found in Tcl API packages the package ipgen where I do not know what to do with

If I understood right until now:

Quartus Prime uses the MegaWizard Plug-In Manager which somehow interacts with the mega_altpllq.exe.

How can I do the same from command line?

(ALTPLL is only an example for any MegaWizard I)

Stefan