check-missing-images.sh

#!/bin/bash
# author: Clément Désiles aka Jokester
# date: 2019-09-30
#
# requires: lstags, jq and yq
#   install hints:
#     $ sudo apt install -qqy jq && pip install yq
#     $ wget -O /tmp/lstags.tar.gz https://github.com/ivanilves/lstags/releases/download/v1.1.2/lstags-linux-v1.1.2.tar.gz
#     $ tar -xvf /tmp/lstags.tar.gz && rm -f /tmp/lstags.tar.gz
#     $ mv lstags $HOME/.local/bin
#
# usage: check-missing-images.sh /path/to/docker-compose.yml
set -e

error () { echo -e -n "\033[1;31m$1\033[0m\n"; }
DOCKER_COMPOSE=$1

if [ ! -f $DOCKER_COMPOSE ]; then error "docker-compose file not found!"; fi

# env file to eval eventual vars in images
WD=$(dirname $DOCKER_COMPOSE)
if [ -f "$WD/env" ]; then . $WD/env; fi
if [ -f "$WD/.env" ]; then . $WD/.env; fi

IMAGES=$(echo $(eval echo $(yq -r '.services[].image' "$DOCKER_COMPOSE" | tr '\n' ' ')))
NOT_FOUND_IMAGES=$(lstags $IMAGES 2>/dev/null | grep ASSUMED  | awk '{print $NF}')

if [ -z "$NOT_FOUND_IMAGES" ]; then
  echo "This docker-compose contains all images"
  exit 0
else
  error "These images could no be found:"
  echo "$NOT_FOUND_IMAGES"
  exit 1
fi