add retag script

retag-clean.sh

+#!/bin/sh
+REG='https://registry.git-ce.rwth-aachen.de'
+AUTH_BASE='https://git-ce.rwth-aachen.de/jwt/auth'
+# www-authenticate: Bearer realm="https://git-ce.rwth-aachen.de/jwt/auth",service="container_registry",scope="repository:rz/docker-test/mampf:pull"
+IMAGE_NAME='rz/docker-test/mampf'
+USER=YOUR_USER_NAME
+PASS=YOUR_PASSWORD
+
+TAG_SOURCE="dev0"
+TAG_TARGET="even-more-dev-ish"
+
+AUTH_URL="$AUTH_BASE?service=container_registry&scope=repository:$IMAGE_NAME:pull,push"
+MANIFEST_SOURCE="$REG/v2/$IMAGE_NAME/manifests/$TAG_SOURCE"
+MANIFEST_TARGET="$REG/v2/$IMAGE_NAME/manifests/$TAG_TARGET"
+
+MANIFEST_TYPE='application/vnd.docker.distribution.manifest.v2+json'
+
+set -e
+
+# auth
+token=$(curl -s --user "$USER:$PASS" "$AUTH_URL" | jq -r .token)
+authHeader="Authorization: Bearer $token"
+
+# fetch source manifest
+manifest=$(curl -s --fail-with-body -H "$authHeader" -H "Accept: $MANIFEST_TYPE" "$MANIFEST_SOURCE")
+
+echo "manifest:"
+echo "$manifest"
+
+# PUT to new tag
+curl -s --fail-with-body -X PUT -H "$authHeader" -H "Content-Type: $MANIFEST_TYPE" --data-binary "$manifest" "$MANIFEST_TARGET"
+
+echo "done"
+