Support installing Python release candidates #365
Description
For testing purposes, it would be nice to be able to install Python pre-release versions, for example Python 3.13.0rc2 is currently available on conda-forge. When I tried to set the Python version to 3.13.0rc2, I got the error (see GH actions run here):
Sun, 15 Sep 2024 08:13:17 GMT
Run conda-incubator/[email protected]
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Gathering Inputs...
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Creating bootstrap condarc file in /home/runner/.condarc...
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Ensuring installer...
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Running installer...
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Setup environment variables...
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Parsing environment...
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Configuring conda package cache...
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Applying initial configuration...
Sun, 15 Sep 2024 08:13:26 GMT
Initializing conda shell integration...
Sun, 15 Sep 2024 08:13:29 GMT
Adding tools to 'base' env...
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Ensuring environment...
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Updating 'test' env from conda create (simple)...
Sun, 15 Sep 2024 08:13:29 GMT /home/runner/miniconda3/condabin/mamba create --name test python=3.13.0rc2
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Sun, 15 Sep 2024 08:13:39 GMT Looking for: ['python=3.13.0rc2']
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Sun, 15 Sep 2024 08:13:39 GMT Could not solve for environment specs
Sun, 15 Sep 2024 08:13:39 GMT The following package could not be installed
Sun, 15 Sep 2024 08:13:39 GMT └─ python 3.13.0rc2** is not installable because it requires
Sun, 15 Sep 2024 08:13:39 GMT └─ _python_rc, which does not exist (perhaps a missing channel).
Sun, 15 Sep 2024 08:13:39 GMT
Sun, 15 Sep 2024 08:13:39 GMT Error: The process '/home/runner/miniconda3/condabin/mamba' failed with exit code 1