pip re-installs carbon and graphite-web packages on every run

[bigunyak]

Hi there,

While writing puppet manifest files to automate graphite installation I notices that carbon and graphite-web pip packages get re-installed on every run. Pip normally doesn't install already installed packages and exits with "Requirement already satisfied" message unless you specify --upgrade option.
The interesting thing that whisper package does not get re-installed.
I believe the problem is that pip can not figure out that carbon and graphite-web packages are already in the system and pip list command proves that, in the output it produces you'll find whisper package only, carbon and graphite-web are not listed.
I wonder if this problem could be fixed as re-installing the packages with every pip run is not an expected behavior really.
I should mention that the problem is apparently a pretty old one as it was already reported over two years ago here:
http://serverfault.com/questions/416489/how-to-tell-puppet-to-only-install-using-pip-if-a-file-doesnt-exist

Dmitry

[brutasse]

That's because of the install prefix: carbon and graphite-web are installed under /opt/graphite by default and pip doesn't know about that. Whisper doesn't have a hardcoded prefix.

You should be able to override the prefixed installation by passing --install-option="--prefix=/usr" --install-option="--install-lib=/usr/lib/python2.7/site-packages/" as options to the pip install command (or change to whatever prefix/python version you need).

[piotr1212]

another reason for #2409

[stale]

This issue has been automatically marked as stale because it has not had recent activity. It will be closed if no further activity occurs. Thank you for your contributions.