[SOLVED] How can I manually update pip on all pyenv virtualenvs?

How can I manually update pip on all pyenv virtualenvs?

I use a different virtual environment for every project I work on (using pyenv and pyenv-virtualenv), and I often come across a message like then when installing a python package using pip:

WARNING: You are using pip version 21.1.3; however, version 21.2.4 is available.
You should consider upgrading via the '/Users/.../.pyenv/versions/3.9.6/envs/sdge/bin/python -m pip install --upgrade pip' command.

However, when I run the pip install --upgrade pip command, it only upgrades pip in that particular virtual environment (which is expected, and that is behavior that I want), and it is annoying to see this across all my different virtual environments.

Is there some kind of shortcut (either with pyenv, pip, or the shell) that I could use to run pip install --upgrade pip on every virtual environment?

Solution

I don't use pyenv so I created this code after reading documentation and source code (not tested):

for env in $(pyenv virtualenvs --bare --skip-aliases); do
    pyenv activate $env
    pip install --upgrade pip
    pyenv deactivate
done