get-opt-example.sh

#!/bin/bash


HELP=false
LIST=false
DELETE=false
TAG=EMPTY
REPOSITORY=EMPTY
ACCEPT_HEADER="application/vnd.docker.distribution.manifest.v2+json"

OPTS=$(getopt -n 'parse-options' -o hrtld -l help:,repository:,tag,:list-tags:delete-tag: -- "$@");
if [ $? != 0 ] ; then echo "Failed parsing options." >&2 ; exit 1 ; fi

while true; do
  case "$1" in
    -h|--help )    HELP=true; shift ;;
    -l|--list-tags ) LIST=true; shift ;;
    -d|--delete-tag ) DELETE=true; shift ;;
    -r|--repository ) REPOSITORY="$2"; shift; shift ;;
    -t|--tag ) TAG="$2"; shift; shift ;;
    -- ) shift; break ;;
    * ) break ;;
  esac
done

echo "HELP:$HELP"
echo "LIST:$LIST"
echo "DELETE:$DELETE"
echo "TAG:$TAG"
echo "REPOSITORY:$REPOSITORY"

if [[ $REPOSITORY = "" ]] ; then echo "Failed parsing options."; exit 1; fi
if [[ $TAG = "" ]] ; then echo "Failed parsing options."; exit 1; fi


function print_help {
        echo "usage:
        [-h | --help] Print this help
        [-l | --list-tags] list all tags in repository, requires -r <repository>
        [-d | --delete-tag] Delete a tag, requires -r <repository> -t <tag>
        [-r | --repository <repository>] Docker repository
        [-t | --t <tag>] Docker tag
"
}

function list_tags {
        local REPOSITORY=$1
        echo "Listing tags in ${REPOSITORY}"
        curl -sk --header "Accept: ${ACCEPT_HEADER}" http://docker.ice-skm.dk:80/v2/skm/datomic/tags/list | jq
}

function delete_tag {
        local REPOSITORY=$1
        local TAG=$2
        echo "Deleting tag < ${TAG} > in Repository < ${REPOSITORY} >"
        local DIGEST=$(curl -sk --head --header "Accept: ${ACCEPT_HEADER}"  "${REPOSITORY}/manifests/${TAG}" | grep Docker-Content-Digest | awk '{print $2}' | tr -d "[:cntrl:]")
        RESP=$(curl -sk -X DELETE --header "Accept: ${ACCEPT_HEADER}" "${REPOSITORY}/manifests/${DIGEST}")
        echo $RESP
}



if [ $HELP = true ] ; then
        printl_help
        exit 0
fi
if [ $LIST = true ] && [[ $REPOSITORY != "EMPTY" ]] ; then
        list_tags $REPOSITORY
        exit 0
fi

if [ $DELETE = true ] && [[ $REPOSITORY != "EMPTY" ]] && [[ $TAG != "EMPTY" ]] ; then
        delete_tag $REPOSITORY $TAG
        exit 0
else
        print_help
        exit 1
fi