Question

As part of a deployment procedure, I upload Python source packages (generated with setup.py sdist) to a remote server and install them in a virtualenv using pip install mypackage-1.0.tar.bz2.

This has worked for long time both for new installs and upgrades (specifically, upgrades without a change in the package’s version number). For some reason I cannot figure out, since yesterday, it fails to upgrade the packages. No error is reported, the files are just not changed. Now I’m sure I’m doing something differently but I can’t explain the change in behaviour.

I can upgrade the package with the -U --no-deps flags, but this technique forces the deployment script to differentiate between first install and upgrades (–no-deps is required as otherwise dependencies would be downloaded each time from pypi).

Any ideas how I can get a single pip command to do installs and upgrades?

Answer 1

pip install package will only be executed with you don’t have this package already.
With you want to upgrade the package you’ll have to use: pip install -U package