mutagen

#!/usr/bin/env bash

## Create and manage a Docksal project with Mutagen (for help: fin mutagen)

VERSION=0.2.2

if [ "$TERM" != "dumb" ]; then
	red='\033[0;91m'
	green='\033[0;32m'
	yellow='\033[0;33m'
  NC='\033[0m'
fi

mutagen > /dev/null 2>&1 || { echo -e "${red}Error${NC}${yellow}: Mutagen not installed${NC}"; exit 1; }
fin docker ps > /dev/null 2>&1 || { echo -e "${red}Error${NC}${yellow}: Docker not running${NC}"; exit 1; }

start() {
  if fin config env > /dev/null 2>&1 ; then
    if [[ -z $(get_fin_variable "MUTAGEN") ]]; then
      new_project=false

      echo -e "${red}WARNING${NC}${yellow}: A Docksal project already exists.${NC}"
      read -rp "You can start Mutagen project after project containers reset
which may produce data loss (ie. database tables).
Do you want to proceed: [y/n] " proceed

      if [ "$proceed" == y ] || [ "$proceed" == Y ] ; then
        init $new_project
      else
        echo 'Aborting'
        return
      fi
    fi
  else
    init true
  fi

  project_root=$(get_fin_variable "PROJECT_ROOT")
  cd "${project_root//\"/}" || { echo "Cannot start"; exit 1; }

  if [ -z $new_project ]; then
    fin "$1"
  fi

  mutagen project start
}

stop() {
  project_root=$(get_fin_variable "PROJECT_ROOT")

  cd "${project_root//\"/}" || { echo "Cannot stop"; exit 1; }

  mutagen project terminate

  if [ -z "$1" ]; then
    fin rm cli
  fi

  fin stop
}

restart() {
    stop "$1"
    start start
}

init() {
  if [ "$1" == true ]; then
    fin config generate
  fi

  set_fin_variable "MUTAGEN" 1
  set_fin_variable "PROJECT_ROOT" "$(fin config | grep PROJECT_ROOT | sed 's/PROJECT_ROOT: //')"
  set_fin_variable "PROJECT_NAME" "$(fin config | grep COMPOSE_PROJECT_NAME_SAFE | sed 's/COMPOSE_PROJECT_NAME_SAFE: //')"
  set_fin_variable "DOCKSAL_VOLUMES" "none"
  create_mutagen_config

  if [ "$1" == false ]; then
    fin rm
    fin up
  fi
}

create_mutagen_config() {
  project_root=$(get_fin_variable "PROJECT_ROOT")
  project_root="${project_root//\"/}"

  if [ ! -f "$project_root/mutagen.yml" ]; then
    project_name=$(get_fin_variable "PROJECT_NAME")
    project_name="${project_name//\"/}"

    cd "$project_root" ||  { echo "Cannot create a mutagen.yml configuration in $project_root"; exit 1; }

    beta="docker://docker@$project_name""_cli_1/var/www"

    echo "sync:
  defaults:
    flushOnCreate: true
    ignore:
      vcs: true
    permissions:
      defaultFileMode: 644
      defaultDirectoryMode: 755
  ${project_name}-cli:
    alpha: './'
    beta: '$beta'
    mode: 'two-way-resolved'" > mutagen.yml

    echo 'mutagen.yml configuration created' in "$project_root"
  fi
}

update() {
  latest_release=$(curl --silent "https://api.github.com/repos/nicoschi/mutagen-for-docksal/releases/latest" | grep '"tag_name":' | sed -E 's/.*"([^"]+)".*/\1/')

  if [ "$latest_release" != "$VERSION" ]; then
    echo -e "${yellow}New release found ($latest_release):
Do you want to proceed with the update:${NC} [y/n] "
    read -rp "" proceed
    if [ "$proceed" == y ] || [ "$proceed" == Y ] ; then
      echo -e "${yellow}Overriding mutagen command in ~/.docksal/commands/${NC}"
      curl "https://raw.githubusercontent.com/nicoschi/mutagen-for-docksal/$latest_release/mutagen" > ~/.docksal/commands/mutagen
      echo -e "
${green}Update done. 'fin mutagen' is now at version $latest_release ${NC}"
    else
      echo 'Aborting'
      return
    fi
  else
    echo -e "${green}Latest release ($VERSION) is already installed${NC}"
  fi
}

version() {
  echo -e "$VERSION"
}

usage() {
  echo '
Usage: fin mutagen [command]

Commands:
start | up          Start / initialize and start / convert and start a Docksal project alongside with a Mutagen project
stop [options]      Stop Docksal project and terminate Mutagen project (if already existing)
  -nr               Do not remove cli container (automatically recreated on start)
restart [options]   Restart Docksal project and Mutagen project (if already existing)
  -nr               Do not remove cli container (automatically recreated on start)
version             Print "fin mutagen" version
update              Check for updates and update to a new release if exists and you want'
}

get_fin_variable() {
  variable=$(fin config get --env=local "$1" 2> /dev/null)

  if [ -z "$variable" ]; then
    fin config get "$1" 2> /dev/null
  else
    echo "$variable"
  fi
}

set_fin_variable() {
  fin config set --env=local "$1"="$2"
}

check_options() {
  if [[ -z $(get_fin_variable "MUTAGEN") ]] && { [ "$1" == 'stop' ] || [ "$1" == 'restart' ]; }; then
      usage
      exit 1
  fi

  if [[ "$1" == 'start' || "$1" == 'up' ]] && [ "$2" ]; then
    usage
    exit 1
  fi

  if [ "$2" ] && [ "$2" != '-nr' ]; then
    usage
    exit 1
  fi
}

case $1 in
  "start"|"up")
    check_options "$@"
    start "$1"
    ;;
  "stop")
    check_options "$@"
    stop "$2"
    ;;
  "restart")
    check_options "$@"
    restart "$2"
    ;;
  "update")
    update
    ;;
  "version")
    version
    ;;
  *)
    usage
    ;;
esac