Push a helm chart to OCI

Signed-off-by: Nikolai Rodionov <allanger@badhouseplants.net>

.woodpecker/build.yaml

@@ -22,20 +22,34 @@ steps:
         securityContext:
           privileged: true
   - name: Push a helm chart
-    image: gitea.badhouseplants.net/badhouseplants/container-builder:latest
+    image: docker.io/alpine/helm
     environment:
       REGISTRY_TOKEN:
         from_secret: GITEA_REGISTRY_TOKEN
     privileged: true
     commands:
-      - build-container
-    backend_options:
-      kubernetes:
-        resources:
-          requests:
-            memory: 500Mi
-            cpu: 200m
-          limits:
-            memory: 500Mi
-        securityContext:
-          privileged: true
+      - |-
+        helm registry login https://gitea.badhouseplants.net \
+          --password-stdin=$REGISTRY_TOKEN \
+          --username=devops-bot \
+      - export SHORT_SHA="+$(git rev-parse --short HEAD)"
+      - |-
+        for chart in $(find charts -maxdepth 1 -mindepth 1 -type d); do
+          yq e -i ".version += env(SHORT_SHA)" "$chart/Chart.yaml"
+          yq e -i ".appVersion = env(SHORT_SHA)" "$chart/Chart.yaml"
+          helm dep build $chart
+          helm package $chart -d chart-packages;
+        done
+      - export CHARTS=$(find chart-packages -maxdepth 1 -mindepth 1 -type f)
+      - export REGISTRY=$(echo oci://gitea.badhouseplants.net/$CI_REPO/helm | tr '[:upper:]' '[:lower:]')
+      - |-
+        for chart in $CHARTS; do  
+          echo ${chart}
+          CHART_NAME=$(helm show chart "${chart}" | yq .name)
+          CHART_VERSION=$(helm show chart "${chart}" | yq .version)
+          if helm pull ${REGISTRY}/${CHART_NAME}:${CHART_VERSION}; then
+            echo "Chart is found in the upstream: ${CHART_NAME}:${CHART_VERSION}"
+            continue;
+          fi
+          helm push "${chart}" "${REGISTRY}"
+        done