add k8s version check against versions supported by charts

scripts/validate-charts

@@ -6,6 +6,10 @@ info() {
     echo '[INFO] ' "$@"
 }
 
+warn() {
+    echo '[WARN] ' "$@" >&2
+}
+
 error() {
     echo '[ERROR] ' "$@" >&2
 }
@@ -57,6 +61,48 @@ check_system_registry() {
     ' $yaml_tmp
 }
 
+is_supported() {
+kube_version="$1"
+lower_bound="$2"
+upper_bound="$3"
+
+kube_version="${kube_version#[vV]}"
+kube_version_major="${kube_version%%\.*}"
+kube_version_minor="${kube_version#*.}"
+kube_version_minor="${kube_version_minor%.*}"
+kube_version_patch="${kube_version##*.}"
+kube_version_dash="${kube_version_patch##*-}"
+kube_version_patch="${kube_version_patch%-*}"
+
+lower_bound="${lower_bound#[vV]}"
+lower_bound_major="${lower_bound%%\.*}"
+lower_bound_minor="${lower_bound#*.}"
+lower_bound_minor="${lower_bound_minor%.*}"
+lower_bound_patch="${lower_bound##*.}"
+lower_bound_dash="${lower_bound_patch##*-}"
+lower_bound_patch="${lower_bound_patch%-*}"
+
+
+upper_bound="${upper_bound#[vV]}"
+upper_bound_major="${upper_bound%%\.*}"
+upper_bound_minor="${upper_bound#*.}"
+upper_bound_minor="${upper_bound_minor%.*}"
+upper_bound_patch="${upper_bound##*.}"
+upper_bound_dash="${upper_bound_patch##*-}"
+upper_bound_patch="${upper_bound_patch%-*}"
+
+if [ "$lower_bound_major" -le "$kube_version_major"  ] && \
+    [ "$kube_version_major" -le "$upper_bound_major" ] && \
+    [ "$lower_bound_minor" -le "$kube_version_minor"  ] && \
+    [ "$kube_version_minor" -le "$upper_bound_minor" ] && \
+    [ "$lower_bound_patch" -le "$kube_version_patch"  ] && \
+    [ "$kube_version_patch" -le "$upper_bound_patch" ]; then
+    echo 0
+else
+    echo 1
+fi
+}
+
 check_airgap() {
     chart_version=$1
     chart_name=$2
@@ -66,6 +112,23 @@ check_airgap() {
     values="vCenter.clusterId=test-id"
     helm template test-chart --kube-version ${KUBERNETES_VERSION} --set $values $chart_tmp > $yaml_tmp;
 
+    chart_folder=$(mktemp -d)
+    tar xfz $chart_tmp -C $chart_folder
+
+    version_annotation=`awk '$1 ~ /catalog.cattle.io\/kube-version:/ {
+        print $3 " " $5
+    }
+    ' $chart_folder/$chart_name/Chart.yaml `
+    if ! [ -z ${version_annotation} ]; then
+        version_annotation=${version_annotation:0:-1}
+        read lower_bound upper_bound <<< $version_annotation
+
+        supported=$(is_supported ${KUBERNETES_VERSION} $lower_bound $upper_bound)
+        if [ $supported = 1 ] ; then
+            warn "Chart $chart_name:$chart_version does not support k8s ${KUBERNETES_VERSION}. Skipping airgap check"
+            return
+        fi
+    fi
     awk '$1 ~ /^image:/ {
         gsub(/"/, "", $2)
         gsub(/^docker.io/, "", $2)