bfrt_python is missing

[vgurevich]

After building Open-P4Studio, and running the suggested example (and observing the tests successfully passing), I noticed that `bfrt_python command is not not accessible from bfshell.

Here is the output:

ubuntu@ip-172-31-1-135:~/open-p4studio$ ./run_bfshell.sh
Using SDE /home/ubuntu/open-p4studio
Using SDE_INSTALL /home/ubuntu/open-p4studio/install
Connecting to localhost port 7777 to check status on these devices: [0]
Waiting for device 0 to be ready
/home/ubuntu/open-p4studio/install/bin/bfshell

        ********************************************
        *      WARNING: Authorised Access Only     *
        ********************************************
    
bfshell>  <TAB>
access  exit    help    pipemgr quit    ucli    version 
bfshell> 

As you can see, bfrt_python command is missing.

This is a very serious issue as it makes both prototyping and debugging nearly impossible without writing tons of complicated code for every single little thing one needs to check.

[fruffy]

@pkotikal Which packages provides bfrt_python? Was that part of the compiler?

[vgurevich]

@fruffy -- bfrt_python consists of two main components:

1. It's own CPython distribution, located in ${SDE}/pkgsrc/target-utils/cpython -- I see that it is not present in the current tree. It might be related to Use the system-level Python for bf-python instead of a hardcoded 3.10 cpython. #15
2. The actual implementation in Python, located in ${SDE}/pkgsrc/bf-drivers/src/bf_rt/bf_rt_python. This one seems to be present and OK

[fruffy]

@fruffy -- bfrt_python consists of two main components:

1. It's own CPython distribution, located in `${SDE}/pkgsrc/target-utils/cpython` -- I see that it is **not present** in the current tree. It might be related to [Use the system-level Python for bf-python instead of a hardcoded 3.10 cpython. #15](https://github.com/p4lang/open-p4studio/issues/15)

Ah yes, now I remember. There are some problems with bf-python and we were not able to build it. Now that we have at least a basic working version we can go back and sort out the build issues there.

[jafingerhut]

@fruffy -- bfrt_python consists of two main components:

1. It's own CPython distribution, located in ${SDE}/pkgsrc/target-utils/cpython -- I see that it is not present in the current tree. It might be related to Use the system-level Python for bf-python instead of a hardcoded 3.10 cpython. #15
2. The actual implementation in Python, located in ${SDE}/pkgsrc/bf-drivers/src/bf_rt/bf_rt_python. This one seems to be present and OK

@vgurevich Is this directory in the repository the one you call ${SDE}/pkgsrc/target-utils/cpython above?

• https://github.com/p4lang/open-p4studio/tree/main/pkgsrc/target-utils/third-party/cpython

[vgurevich]

@jafingerhut -- oops, you are right -- I missed it somehow. Then, it's a matter of making sure the stuff is compiled.

[fruffy]

@vgurevich Can you try and see whether enabling the variable toggled here works for you?

Right now this is not enabled because of Python versioning problems.