This repo holds a fully standalone python 3.6 virtual environment for executing jobs requiring python3 on Optimus Bamboo shared agents. A "standard" python3 virtual environment still has some dependencies on the python3 installation used to create it.

Differences to a "standard" python3 virtual environment:

• made using --copies option rather than the typical symlinks on linux
• includes libpython library
• includes lib/python3.6 folders
• includes activate_ld (modified from activate script) to set LD_LIBRARY_PATH and PYTHONPATH, and adjust hard-wired #! paths in venv scripts

If running under Bamboo shared agent the virtual environment must be activated by executing:

python-venv-centos/env/bin/activate_ld

This will set the relevant environment variables so that python will only resolve needed libraries and modules from within the virtual environment.

1. Install python3.x
2. Create a new virtual environment in the usual manner, but using the --copies option:

   python3 -m venv --copies env
   

3. Copy the runtime library and python3.x library into the virtual environment (example assumes python3 installed in usual location):

    $ cp /lib64/libpython3.6m.so.1.0 env/lib
    $ cp -r /lib64/python3.6 /env/lib
    $ cd env/lib
    $ ln -s libpython3.6m.so.1.0 libpython3.6m.so
   

4. Install a copy of activate_ld in the env/bin folder

   mv env/bin/activate env/bin/activate-ORIG
   (cd env/bin; ln -s activate_ld activate)