Hi Alex,
To clarify, "add additional sources" option (in HDL Workflow Advisor "Generate RTL code and IP core" step) is intended to include additional source files into the generated IP core. It will not execute the supplied Tcl script.
If you want to "I have to open Vivado, add the new IP core to the existing project and implement with it.", have you tried to create a custom reference design in IP core generation workflow? The steps to select a reference design (existing project), and run build tasks are exactly doing what you described. After you create a custom reference design, there are also callback functions you could use to execute your customized Tcl script.
Example of the IP core generation workflow with reference deisgn/bitstream build tasks; https://www.mathworks.com/help/hdlcoder/ug/getting-started-with-hardware-software-codesign-workflow-for-zynq-ultrascale-mpsoc-devices.html
Document/Examples of creating a custom reference design to include your existing project into the workflow:
Callback functions available when define custom reference design (where you could execute your tcl):
Alternatively, if you only want to run IP core generation (without the later build steps). You could Export a script from HDL Workflow Advisor, and run the IP core generaiton workflow in command-line. This way you could then execute your Tcl using command line, so you can have one combined script to do both IP core generation and the Tcl execution.
Thanks,
Wang
