How does one enter a Python virtual environment and run shell commands in it from a shell script?
I have been writing a shell script to be run in a CentOS 7 Docker container in order to create an AppImage. In this script I would like to run the Shell command pip install -U spyder from within a Python virtual environment (started by running source AppDir/usr/bin/activate) started by the shell script. The problem is that I don't know how to do this because lines in the script after the source AppDir/usr/bin/activate line are ignored (as at this point in the script, the shell has entered the Python virtual environment). So is there some option I need to pass the source AppDir/usr/bin/activate command so that it will run the pip install -U spyder command in this Python virtual environment?
You can install your requirement without activating virtual environment, but with providing full path to your virtualenv pip.
<path_to_virtualenv>/bin/pip install -U spyder
Because what activate is doing it's putting your virtualenv bin/ folder before the PATH, so that pip, python commands would be references to your viartualenv's before global ones. From source of activate:
VIRTUAL_ENV="<path_to_env>"
export VIRTUAL_ENV
_OLD_VIRTUAL_PATH="$PATH"
PATH="$VIRTUAL_ENV/bin:$PATH"
export PATH
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