setting an environment variable

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Martin Genet

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Dec 23, 2020, 1:19:00 PM12/23/20
to Anaconda - Public
Hi all,

I'm trying to set an environment variable in a conda environment file. I need something like $CPATH = $CONDA_PREFIX/include/vtk-9.0.
I followed https://docs.conda.io/projects/conda/en/latest/user-guide/tasks/manage-environments.html#setting-environment-variables and tried the following minimal yml:

name: test
variables:
     CPATH: $CONDA_PREFIX/include/vtk-9.0

But unfortunately $CONDA_PREFIX is no substituted. Does anyone know how to do this? Thank you!

Martin

David Kun

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Jan 8, 2021, 8:33:24 PMJan 8
to Anaconda - Public, martin...@polytechnique.edu
Hopefully, you've already figured this out.  It appears that setting the environment variable within a conda environment differs if you're on Linux or Windows.

For Windows, this snippet of commands worked for me

(test-env) C:\Users\aaa>conda activate test-env

(test-env) C:\Users\aaa>conda env config vars list

(test-env) C:\Users\aaa>conda env config vars set CPATH=%CONDA_PREFIX%\include\vtk-9.0
To make your changes take effect please reactivate your environment

(test-env) C:\Users\aaa>conda activate test-env

(test-env) C:\Users\aaa>conda env config vars list
CPATH = C:\Users\aaa\miniconda3\envs\test-env\include\vtk-9.0

For Linux (I'm using CentOS VM),

(test-env) [vagrant@localhost ~]$ conda env config vars list
(test-env) [vagrant@localhost ~]$ conda env config vars set CPATH=$CONDA_PREFIX/include/vtk-9.0
To make your changes take effect please reactivate your environment
(test-env) [vagrant@localhost ~]$ conda activate test-env
(test-env) [vagrant@localhost ~]$ conda env config vars list
CPATH = /home/vagrant/.conda/envs/test-env/include/vtk-9.0

I hope that I understood the problem and the above snippets helps.

Martin Genet

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Jan 10, 2021, 4:43:42 PMJan 10
to David Kun, Anaconda - Public
Thank you David.

I tried to do it through the yml file, but it did not work so well.

Defining them using conda env config vars set is definitely the way to go, even though it is one more line than my students have to run.

Thanks again!

Martin

Ray Donnelly

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Jan 10, 2021, 5:58:37 PMJan 10
to Anaconda - Public
You need to use an activation script

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