Custom shell to use Docker Desktop and Rancher Desktop on the same machine using their own clients

container-desktop-shell.sh

#!/bin/bash

set -eu -o pipefail



function docker_desktop() {
  CONTEXT_DESC="Docker Desktop"
  DD_HOME="$HOME/.docker"

  export PATH="/usr/local/bin:$PATH"
  export DOCKER_CONTEXT=desktop-linux
  export DOCKER_CONFIG="$DD_HOME"

  container_desktop_shell
}

function rancher_desktop() {
  CONTEXT_DESC="Rancher Desktop"
  RD_HOME="$HOME/.rd"
  SOCKET_DIR="$RD_HOME"

  export PATH="$RD_HOME/bin:$PATH"
  export DOCKER_CONTEXT=rancher-desktop
  export DOCKER_CONFIG="$RD_HOME/docker"

  container_desktop_shell
}

function container_desktop_shell() {
  (
    docker --context default context ls --quiet | grep "^$DOCKER_CONTEXT\$" \
    || docker --context default context create "$DOCKER_CONTEXT" --description "$CONTEXT_DESC" --docker "host=unix://$SOCKET_DIR/docker.sock"
  ) 1>/dev/null

  exec $SHELL
}

shell_name="${1:-}"

case "$shell_name" in
  docker)
    docker_desktop
    ;;
  rancher)
    rancher_desktop
    ;;
  *)
    >&2 echo "Valid container desktop shell names: docker, rancher"
    exit 1
    ;;

esac