commands

#!/usr/bin/env bash
set -eo pipefail; [[ $DOKKU_TRACE ]] && set -x

# Check if name is specified
if [[ $1 == link ]] || [[ $1 == link:* ]]; then
  if [[ -z $2 ]]; then
    echo "You must specify an app name"
    exit 1
  else
    APP="$2"
    LINK_FILE="$DOKKU_ROOT/$APP/LINK"

    # Check if app exists with the same name
    if [ ! -d "$DOKKU_ROOT/$APP" ]; then
      echo "App $APP does not exist"
      exit 1
    fi

    [ -f $LINK_FILE ] || {
      echo "-----> Creating $LINK_FILE"
      touch $LINK_FILE
    }
  fi
fi

case "$1" in
  link)
    APP="$2"

    if [ ! -f $LINK_FILE ] || [ ! -s $LINK_FILE ] ; then
      echo "$APP has no links"
      exit 1
    fi

    echo "=== $APP links ==="
    cat $LINK_FILE
  ;;

  link:create)
    if [[ -z "${*:3}" ]]; then
      echo "Usage: dokku link:create APP NAME [ALIAS]"
      echo "Must specify NAME to create."
      exit 1
    fi

    NAME="$3"
    if [[ -z $4 ]]; then
      ALIAS="$NAME"
    else
      ALIAS="$4"
    fi

    VAR="${NAME}:${ALIAS}"
    echo "-----> Linking $VAR with $APP"
    echo "$VAR" >> $LINK_FILE
    LINK_TEMP=`cat $LINK_FILE`
    echo -e "$LINK_TEMP" | sed '/^$/d' | sort -u > $LINK_FILE
  ;;

  link:delete)
    if [[ -z $3 ]]; then
      echo "Usage: dokku link:delete APP NAME [ALIAS]"
      echo "Must specify NAME to delete."
      exit 1
    fi

    NAME="$3"
    if [[ -z $4 ]]; then
      ALIAS="$NAME"
    else
      ALIAS="$4"
    fi

    VAR="${NAME}:${ALIAS}"
    echo "-----> Unlinking $VAR from $APP"
    LINK_TEMP=`cat "${LINK_FILE}"`
    LINK_TEMP=$(echo -e "${LINK_TEMP}" | sed "s/${VAR}//")
    echo -e "$LINK_TEMP" | sed '/^$/d' | sort -u > $LINK_FILE
  ;;

  help)
    cat && cat<<EOF
    link <app>                                      display links for an app
    link:create <app> NAME [ALIAS]                  create a link for an app
    link:delete <app> NAME [ALIAS]                  delete a link for an app
EOF
  ;;

  *)
    exit $DOKKU_NOT_IMPLEMENTED_EXIT
  ;;

esac