Docker wrapper script for WMCore CI/CD

docker.sh

#!/bin/bash
# Author: Valentin Kuznetsov <[email protected]>
# helper script to handle docker actions

if [ $# -ne 4 ]; then
     echo "Usage: docker.sh <action> <service> <tag> <registry> "
     exit 1;
fi

# helper function to match the pattern X.Y.Z where X, Y, and Z are numbers
function match_tag {
  local tag=$1
  if [[ $tag =~ ^([0-9]+)\.([0-9]+)\.([0-9]+)$ ]]; then
    return 0
  elif [[ $tag =~ ^([0-9]+)\.([0-9]+)\.([0-9]+)\.([0-9]+)$ ]]; then
    return 0
  else
    return 1
  fi
}

# make input variable assignments
action=$1
service=$2
tag=$3
registry=$4
rurl=$registry/cmsweb/$service

# check if action is supported
case "$action" in
  "build"|"push"|"remove"|"delete")
    ;;
  *)
    echo "action: '$action' is not supported"
    exit 1
    ;;
esac

# determine suffix of image tag
suffix=""
if match_tag "$tag"; then
    suffix="-stable"
fi

# check build/push actions and build the image(s) if it will be required
if [ "$action" == "build" ] || [ "$action" == "push" ]; then
    echo "check if image with service=$service and tag=$tag exist ..."
    image_exist=`docker images | grep $tag | grep $service`
    if [ -z "$image_exist" ]; then
        echo "action: docker build --build-arg TAG=${tag} --tag ${rurl}:${tag}"
        docker build --build-arg TAG=${tag} --tag ${rurl}:${tag} .
        if [ "$suffix" == "-stable" ]; then
            echo "action: docker build --build-arg TAG=${tag} --tag ${rurl}:${tag}${suffix}"
            docker build --build-arg TAG=${tag} --tag ${rurl}:${tag}${suffix} .
        fi
    fi
    docker images | grep $tag | grep $service
fi
if [ "$action" == "push" ]; then
    echo "action: docker push ${rurl}:${tag}"
    docker push ${rurl}:${tag}
fi
if [ "$action" == "remove" ] || [ "$action" == "delete" ]; then
    echo "action: docker image rm -f ${rurl}:${tag}"
    docker rmi ${rurl}:${tag}
fi