Guidance on syntax for installs from local channel

[ranjitiyer]

I'm submitting a...

• [ ] bug report
• [ ] feature request
• [x] query

Current Behavior

I'm wanting some guidance on the correct syntax to install a package from a local channel but allow dependencies to be obtained from the 'default' channel.

I have a locally built sparkmagic package (built with conda build)

1. Index it

   root@95ac4cdd1e1c:/# conda index /tmp/linux-64/
   root@95ac4cdd1e1c:/# ls /tmp/linux-64/
   repodata.json  repodata.json.bz2  sparkmagic-0.12.5-py36h39e3cac_0.tar.bz2

2. Add local channel

   conda search --platform linux-64 --offline -c file:///tmp --override-channels
   Loading channels: done
   # Name                  Version           Build  Channel
   sparkmagic               0.12.5  py36h39e3cac_0  tmp
   root@95ac4cdd1e1c:/#

3. List channels and find 'tmp' has precedence

   root@95ac4cdd1e1c:/# conda config --get channels
   --add channels 'defaults'   # lowest priority
   --add channels 'tmp'   # highest priority
   root@95ac4cdd1e1c:/#

4. Enforce channel priority

   conda config --set channel_priority true

5. Install sparkmagic. I notice that it won't find sparkmagic in the local channel but tries to install it from 'default'

conda install --dry-run --channel-priority --show-channel-urls --force --use-local sparkmagic

 Package Plan ##

  environment location: /root/miniconda3

  added / updated specs:
    - sparkmagic

The following packages will be downloaded:

    package                    |            build
    ---------------------------|-----------------
    constantly-15.1.0          |   py36h28b3542_0          13 KB  defaults
    twisted-18.4.0             |   py36h14c3975_0         4.9 MB  defaults
    widgetsnbextension-3.3.0   |           py36_0         1.7 MB  defaults
          . . . 
   sparkmagic-0.12.5          |           py36_0          65 KB  defaults
    numpy-1.15.0               |   py36h1b885b7_0          35 KB  defaults
    jsonschema-2.6.0           |           py36_0          62 KB  defaults

I'm new to this, so guessing there's a missing flag or step.

My objective is to install sparkmagic alone from tmp but have its dependencies obtained from default

Thanks :)

[kalefranz]

Ah. The --use-local flag is equivalent to -c local. There is literally a special channel named local, which is actually the conda-build channel, and therefore sort of a confusing name. Unfortunately, it's historic and difficult to change, so we're stuck with it.

For what you're trying to do, --channel-priority --show-channel-urls --force are all overkill. Channel priority is enabled by default. I didn't even know --show-channel-urls was a valid flag for the install command. The --force we're trying to get away from; it means too many different things in too many different contexts.

For what you're trying to do, I'd recommend just

conda install --dry-run -c file:///tmp sparkmagic

or

conda install --dry-run file:///tmp::sparkmagic

[github-actions[bot]]

Hi there, thank you for your contribution to Conda!

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

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[github-actions[bot]]

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