Cygdb not working with recent virtualenvs

[BertrandBordage]

In recent Python virtualenvs, there is no activate_this.py file.

Cygdb therefore fails to load:

Reading symbols from python3-dbg...done.
gdb command file: Activating virtualenv: /home/myuser/.virtualenvs/myenv; path_to_activate_this_py: /home/myuser/.virtualenvs/myenv/bin/activate_this.py
Traceback (most recent call last):
  File "<string>", line 8, in <module>
FileNotFoundError: [Errno 2] Aucun fichier ou dossier de ce type: '/home/myuser/.virtualenvs/myenv/bin/activate_this.py'
/tmp/tmpohzn6ela:19: Error in sourced command file:
Error while executing Python code.

[astrojuanlu]

Is cygdb supported with python3-dbg at all? If so, the documentation is outdated http://docs.cython.org/en/latest/src/userguide/debugging.html Not sure if that's the cause of this issue though.

[scoder]

To do: find the right way to activate a Py3 venv and do that conditionally in Cygdb.py.

[astrojuanlu]

Not sure if that's the cause of this issue though.

Answering my old self: this happens for virtual environments created with Python 3 venv or pyenv, see https://stackoverflow.com/a/33637378/554319.

[astrojuanlu]

For the moment, testing this horrible hack:

            if virtualenv:
                # path_to_activate_this_py = os.path.join(virtualenv, 'bin', 'activate_this.py')
                # print("gdb command file: Activating virtualenv: %s; path_to_activate_this_py: %s" % (
                #     virtualenv, path_to_activate_this_py))
                # with open(path_to_activate_this_py) as f:
                #     exec(f.read(), dict(__file__=path_to_activate_this_py))
                import sys
                sys.path.insert(0, os.path.join(virtualenv, "lib", "python3.7", "site-packages"))

[scoder]

PR welcome that fixes this. Even one that resolves it only for Py3.

[seilis]

Recently ran into this issue setting up cygdb in an existing environment that uses venv extensively. What's required to push through the fix? The last comments on the PR date from last September.

If some help is needed, I can jump in.