Feature suggestion: clone virtualenv to new env

[al3xandru]

While working on different library version it would be extremely helpful to be able to clone an existing virtualenv.

Right now what I do is:

1. pip freeze > requirements.txt in the current virtualenv
2. pyenv virtualenv ...
3. pyenv shell newvirtualenv
4. pip install -r requirements.txt

Not too bad, but it could be easier.

[yyuu]

https://github.com/yyuu/pyenv-pip-migrate

[neverfox]

That's a cool plugin and all, but it doesn't seem to support virtualenvs that you want to move from one parent to another, preserving the env's name. For example, say I have 3.6.4 installed and a virtualenv installed under it (/usr/local/Cellar/pyenv/1.2.3/versions/3.6.4/envs/my-venv). Now I install 3.6.5 and because I want my-env to use that instead, I want it to be at /usr/local/Cellar/pyenv/1.2.3/versions/3.6.5/envs/my-venv. Is there a process for making that happen?