cj-wright / conda-metachannel

like a conda-metapackage but for channels!

conda-metachannel

This is a small little web application to behave like a conda channel but with constraints.

By doing this you can add a small conda-forge channel that has a limited number of edges

<HOSTNAME>/conda-forge/pandas,ipython,scikit-learn

This is a channel that contains pandas, ipython and scikit-learn (and all of their dependencies), and nothing else.

Advanced features

--max-build-no

Adding this to the constraint clause will filter out outdated builds from the graph. This is typically what most users actually want to run.

e.g.

$ conda search --override-channels \
      -c http://<HOSTNAME>/conda-forge/python, 'python=3.6.1'

python                    3.6.1               0  conda-forge/python
python                    3.6.1               1  conda-forge/python
python                    3.6.1               2  conda-forge/python
python                    3.6.1               3  conda-forge/python

$ conda search --override-channels \
      -c http://<HOSTNAME>/conda-forge/python,--max-build-no 'python=3.6.1'

python                    3.6.1               3  conda-forge/python,--max-build-no

channel fusing

You can fuse two or more channels together.

http://<HOSTNAME>/<CHANNELA>,<CHANNELB>/<CONSTRAINTS>

This will function like a composite of these two channels. Packages that exist in channel B will supercede those in channel A for ALL versions.

Channels that contain non-urlsafe characters need to be url-escaped

e.g.

$ conda search --override-channels -c http://35.232.222.82/conda-forge,conda-forge%2Flabel%2Fgcc7/--max-build-no 'pandas'

pandas    0.23.4 py27h1702cab_1000  conda-forge,conda-forge%2Flabel%2Fgcc7/--max-build-no
pandas    0.23.4 py36h1702cab_1000  conda-forge,conda-forge%2Flabel%2Fgcc7/--max-build-no
pandas    0.23.4 py37h1702cab_1000  conda-forge,conda-forge%2Flabel%2Fgcc7/--max-build-no