Resolve "Force `ddeploy` options (e.g. image retention)"

Closes #43 (closed)

scripts/enforce_labels.bash

+#!/bin/bash
+# From a given list of labels, check which of them are already defined in the provided docker image; if any of the labels
+# is not defined, a new image with the same name is generated with the label(s) added.
+# Labels already defined are not modified.
+
+if [ "$#" -ne 1 ]; then
+    echo "Usage: $0 IMAGE_NAME"
+    exit 1
+fi
+
+image_name="$1"
+
+# list of labels to be enforced
+declare -A enforced_labels=( ["com.jfrog.artifactory.retention.maxCount"]="10" ["com.jfrog.artifactory.retention.maxDays"]="7")
+
+if ! docker inspect --type=image "$1" > /dev/null ; then
+    echo "Error: image does not exist"
+    exit 0
+fi
+
+# check if every label is defined
+for label in "${!enforced_labels[@]}" ; do
+    if ! docker inspect -f "{{json .Config.Labels }}" "$image_name" | jq -e '.['\""$label"\"']' > /dev/null ; then
+        echo "Key not found"
+        echo "$label = ${enforced_labels[$label]}"
+        # add missing label to the arguments to be provided to `docker build`
+        label_args+=" --label $label=\"${enforced_labels[$label]}\""
+    fi
+done
+
+# generate new image
+if [ -n "${label_args+x}" ]; then
+    run_command="echo \"FROM $image_name\" | docker build $label_args -t $image_name -"
+    eval "$run_command"
+fi