It would be nice to have support for conda in pre-commit as a "language"/environment manager. This would enable setups where packages are installed through conda. The typical usage for this will be for Python and R setups (e.g. lorenzwalthert/precommit#99) where conda is most popular but as conda is language independent.

The implementation would work as follows:

• A hook is expected to have a requirements.txt that is installed using conda create -p <prefix> --file=requirements.txt. I would not use the conda environment.yml as this already dictates the name of the environment.
• The hook is run using conda run -p <prefix> <entry>
• We will use the conda executable that is available on the PATH.

Note: I would volunteer to implement this once there are some 👍 that the proposal is sound.