docker wrapper for podman, colima and docker

docker

#!/usr/bin/env bash

# Author: rakibfiha
# Usage: Save it to $HOME/.local/bin/docker and add this path to your $PATH
# ENV: DOCKER_RUNTIME=podman|colima-containerd; Default: colima-containerd
# For colima: colima start --runtime containerd
# For podman: podman machine init && podman machine start and set DOCKER_RUNTIME=podman
# For docker: set DOCKER_RUNTIME=full/path/to/docker/executable

runtime_exists() {
  local status runtime
  runtime="$1"
  type -p "$runtime" > /dev/null && status=0 || status=1
  if [[ $status == 1 ]]; then 
    echo "Runtime: $runtime does not exist.." >&2 && return 1;
  fi
}

_docker() {
  local runtime="$1"
  local status docker_host

  shift 2
  case "$runtime" in
    colima-containerd)
      ! runtime_exists colima && exit 1;
      type -p nerdctl  > /dev/null || colima nerdctl install 2> /dev/null;
      docker_host="unix:///$HOME/.colima/docker.sock"

      DOCKER_HOST="${DOCKER_HOST:-$docker_host}" nerdctl "$@"
      ;;
    podman)
      ! runtime_exists podman && exit 1;
      docker_host="unix:///$HOME/.local/share/containers/podman/machine/podman-machine-default/podman.sock"

      DOCKER_HOST="${DOCKER_HOST:-$docker_host}" podman "$@"
      ;;
    *)
      if [[ -x "$runtime" ]]; then
        if "$runtime" -v | awk '{print $1}' | grep -qi '^Docker$'; then
          "$runtime" "$@" && status=$? || status=$?
           exit "$status"
        fi
      fi
      echo "Runtime: $runtime does not exist.. Exiting.." && exit 1;
      ;;
  esac
}

docker() {   
  local runtime=$1
  _docker "$runtime" "$@"
}

main() {
 set -euo pipefail && docker "${DOCKER_RUNTIME:-colima-containerd}" "$@"
}

[[ "${BASH_SOURCE[0]}" == "$0" ]] && main "$@";