multiple_pkg_managers

bashrc

# snippet for file: $HOME/.bashrc
#
# License: CC0
#

# register a bash function that calls the script above
activate-env () {
  . $HOME/bin/impl-activate-env $@
}

# bash completion for the above function
_activate-env()
{
    local cur prev names
    cur="${COMP_WORDS[COMP_CWORD]}"
    prv="${COMP_WORDS[COMP_CWORD]}"
    names="conda emsdk rust spack brew"                  # all primary options
    if [ "${COMP_WORDS[1]}" == "conda" ]; then           # sub envs: conda
        local cenvs=$(ls $HOME/sw/miniconda3/envs)
        COMPREPLY=( $(compgen -W "${cenvs}" -- ${cur}))
        return 0;
    fi
    if [ ${COMP_CWORD} -gt 1 ]; then return 0; fi        # no other sub
    if [ "${cur}" == "" ]; then                          # no arg
        COMPREPLY=(${names})
    else                                                 # during arg eval
        COMPREPLY=($(compgen -W "${names}" -- ${cur}))
    fi
}
complete -F _activate-env activate-env

impl-activate-env.sh

# file: $HOME/bin/impl-activate-env
#
# License: CC0
#
case "${1}" in
    conda)
        export PATH="$HOME/src/miniconda3/bin:${PATH}"
        conda_env=${2:-base}
        source activate ${conda_env}
        if [ "${conda_env}" == "base" ]; then
            conda info --envs
            echo "Activate via: \"conda activate <env>\""
            echo "New environments:"
            echo "  conda create -n py36 python=3.6 anaconda"
            echo "  conda create -n openpmd-api -c conda-forge openpmd-api"
        fi
        ;;
    brew)
        eval $($HOME/src/brew/bin/brew shellenv)
        ;;
    spack)
        . $HOME/src/spack/share/spack/setup-env.sh
        spack env list
        echo "Activate via: \"spack env activate <env>\""
        ;;
    rust)
        export PATH="$HOME/.cargo/bin:${PATH}"
        ;;
    emsdk)
        source $HOME/src/emsdk/emsdk_env.sh --build=Release
        export CC=$(which emcc)
        export CXX=$(which em++)
        echo -n "Reminder: -DCMAKE_TOOLCHAIN_FILE=$HOME/src/"
        echo    "emscripten/cmake/Modules/Platform/Emscripten.cmake"
        ;;
    *)
        echo "Usage: $0 {conda [env]|emsdk|rust|spack|brew}"
esac

# file: .bashrc
# register a bash function that calls the script above
activate-env () {
  . $HOME/bin/impl-activate-env $@
}

# bash completion for the above function
_activate-env()
{
    local cur prev names
    cur="${COMP_WORDS[COMP_CWORD]}"
    prv="${COMP_WORDS[COMP_CWORD]}"
    names="conda emsdk rust spack brew"                  # all primary options
    if [ "${COMP_WORDS[1]}" == "conda" ]; then           # sub envs: conda
        local cenvs=$(ls $HOME/sw/miniconda3/envs)
        COMPREPLY=( $(compgen -W "${cenvs}" -- ${cur}))
        return 0;
    fi
    if [ ${COMP_CWORD} -gt 1 ]; then return 0; fi        # no other sub
    if [ "${cur}" == "" ]; then                          # no arg
        COMPREPLY=(${names})
    else                                                 # during arg eval
        COMPREPLY=($(compgen -W "${names}" -- ${cur}))
    fi
}
complete -F _activate-env activate-env