Automatically activate a conda environment when entering a directory

conda-auto-env.sh

# The following lines should be added to the file ~/.bashrc
# When the current working directory contains a file named .conda-auto-env, the
# conda environement whose name is the content of the file will be activated
conda-auto-env() {
    if [ -e ".conda-auto-env" ] ; then
        env=$(cat .conda-auto-env)
        if [ "$CONDA_DEFAULT_ENV" != "$env" ] ; then
            conda activate $env
        fi
    fi
}
export PROMPT_COMMAND="conda-auto-env;$PROMPT_COMMAND"