Use redis-cli from docker image

Instead of installing dependencies on the host, directly use the binary
shipped with the redis docker image. This will also prevent possible
problems when API change for example.

commands

@@ -8,10 +8,6 @@ if [[ ! -d $PLUGIN_DATA_ROOT ]]; then
   dokku_log_fail "$PLUGIN_SERVICE: Please run: sudo dokku plugins-install"
 fi
 
-if ! command -v redis-cli &>/dev/null; then
-  dokku_log_fail "$PLUGIN_SERVICE: Please run: sudo dokku plugins-install-dependencies"
-fi
-
 case "$1" in
   $PLUGIN_COMMAND_PREFIX:alias)
     [[ -z $2 ]] && dokku_log_fail "Please specify a name for the service"
@@ -155,10 +151,10 @@ case "$1" in
     [[ -z $2 ]] && dokku_log_fail "Please specify a name for the service"
     verify_service_name "$2"
     SERVICE="$2"; SERVICE_ROOT="$PLUGIN_DATA_ROOT/$SERVICE"
+    SERVICE_NAME=$(get_service_name "$SERVICE")
 
-    ID=$(cat "$SERVICE_ROOT/ID")
-    IP=$(get_container_ip "$ID")
-    redis-cli -h "$IP" -p 6379
+    # shellcheck disable=SC2016
+    docker run -it --link "$SERVICE_NAME:redis" --rm "$PLUGIN_IMAGE" sh -c 'exec redis-cli -h "$REDIS_PORT_6379_TCP_ADDR" -p "$REDIS_PORT_6379_TCP_PORT"'
     ;;
 
   $PLUGIN_COMMAND_PREFIX:info)

dependencies

@@ -1,15 +0,0 @@
-#!/usr/bin/env bash
-set -eo pipefail; [[ $DOKKU_TRACE ]] && set -x
-source "$(dirname "$0")/config"
-
-case "$DOKKU_DISTRO" in
-  ubuntu)
-    export DEBIAN_FRONTEND=noninteractive
-    apt-get update
-    apt-get install -o Dpkg::Options::="--force-confdef" -o Dpkg::Options::="--force-confold" --force-yes -qq -y redis-tools
-    ;;
-
-  opensuse)
-    zypper -q in -y redis-tools
-    ;;
-esac