在一个进程中运行来自 bash 脚本的两个命令 (conda)

Question

I'm trying to write a bash script that includes deactivating and removing a conda environment. Here's an example, remove_env.sh :

#!/bin/bash

# Get the conda command available in bash
eval "$(conda shell.bash hook)"

# Deactivate environment
conda deactivate

# Remove environment
conda remove --name my_env --all --yes

The environment must be deactivated in order to remove it.

Unfortunately, this doesn't work. I perform this in the terminal:

$ conda activate my_env
$ ./remove_env.sh

CondaEnvironmentError: cannot remove current environment. deactivate and run conda remove again

I think the issue has to do with forking - essentially, the environment gets deactivated in one process, but then the remove call is run in another process, which doesn't have the environment deactivated. But I'm not entirely sure.

Some notes:

• I can't use source remove_env.sh - I must be able to use ./remove_env.sh
• I've tried this with no success:

#!/bin/bash

# Get the conda command available in bash
eval "$(conda shell.bash hook)"

# Deactivate and remove environment
conda deactivate && conda remove --name my_env --all --yes

• I call the command conda activate my_env in my ~./bashrc
• I can't use aliases - it must be a bash script

Answer 1

Thanks Jonathan for the answer in the comments. You're totally right, I completely overlooked that blue note in the conda manual. I was able to do this:

#!/bin/bash

# Get the conda command available in bash
eval "$(conda shell.bash hook)"

# Activate the environment
conda activate my_env

# Deactivate environment
conda deactivate

# Remove environment
conda remove --name my_env --all --yes

I think it works whether you conda activate with or without arguments.

Answer 2

Alternatively, using Conda's run tool, one could avoid manual activation. That is, something like

#!/usr/bin/env conda run bash

conda env remove -n my_env -y