init-docker

#! /bin/bash
set -e
if ! which docker &> /dev/null; then
  if which apt &> /dev/null; then
    echo "Attempting to install docker.  If you do not want this.  Install manually from https://docs.docker.com/engine/install/"
    sudo apt update
    sudo apt install docker.io -y
  elif which pacman &> /dev/null; then
    sudo pacman -S --noconfirm docker
  else
    echo "Please install docker.  It is suggested to install docker from https://docs.docker.com/engine/install/"
  exit 1
  fi
fi


if ! groups | grep -q docker; then
  if [[ $OSTYPE == 'darwin'* ]]; then
    echo "no need to add docker group on mac - OK"
  else
    echo "adding docker group to this user" 
    sudo usermod -aG docker $USER
    echo "Added 'docker' group to this user"
    echo "ERROR: You must re-login or run: newgrp docker"
    echo "  Then rerun this script"
    exit 1
  fi
fi  

if ! docker ps -q &> /dev/null; then
  echo "Something seems wrong.  This command does not work: docker ps"
  echo "Please ensure that you can access docker without sudo"
  echo "You may need to follow the instructions here (and reboot) or start docker service: https://docs.docker.com/engine/install/linux-postinstall/"
  exit 1
fi
BUILDX_RELEASE=v0.7.0

if ! docker buildx &> /dev/null; then
  echo "no buildx found"
  if ! which curl &> /dev/null; then
     if which apt &> /dev/null; then
       echo "Installing curl..."
       sudo apt update
       sudo apt install curl -y
     else
       echo "curl is required to install buildx" 
       echo "please install curl"
       exit 1
     fi
  fi
  CLI_PLUGIN_DIR="$(realpath ~/)/.docker/cli-plugins"
  BUILDX_BIN="${CLI_PLUGIN_DIR}/docker-buildx"

  mkdir -p ${CLI_PLUGIN_DIR}
  if ! which dpkg &> /dev/null; then
    echo "Only debian based systems (with dpkg) fully supported to install docker buildx.  Please install docker buildx manually."
    exit 1
  else
    architecture="$(dpkg --print-architecture)"
    echo "architecture: $architecture"
    curl -L -o "${BUILDX_BIN}" https://github.com/docker/buildx/releases/download/${BUILDX_RELEASE}/buildx-${BUILDX_RELEASE}.linux-${architecture}
    chmod +x "${BUILDX_BIN}" 
    echo "testing docker buildx..."
    docker buildx ls &> /dev/null
    echo "done"
  fi
fi

if [[ $OSTYPE == 'darwin'* ]]; then
  echo "no need to install qemu on mac - OK"

elif which arch &> /dev/null && [[ "$(arch)" == "amd64" && ! -f /proc/sys/fs/binfmt_misc/qemu-aarch64 || ! -f /proc/sys/fs/binfmt_misc/qemu-arm ]]; then
  if which dpkg; then
    echo "Permanently installing support for other platforms"
    sudo apt-get update
    sudo apt-get install -y qemu binfmt-support qemu-user-static
  else
    echo "WARNING: Could not install qemu, binfmt-support and qemu-user-static.  $0 may need to be run after each reboot!"
    docker run --rm --privileged tonistiigi/binfmt:latest --install all
  fi
  
fi 

if ! docker buildx ls | grep -q portmaster-remote-builder; then
  docker buildx create --name portmaster-remote-builder --driver docker-container
fi

echo "docker ready"