Update manifest

.drone.yml

@@ -259,17 +259,20 @@ platform:
 
 steps:
 - name: manifest
-  image: rancher/dapper:v0.4.2
+  image: plugins/docker
   environment:
-    USERNAME:
+    DOCKER_USERNAME:
       from_secret: docker_username
-    PASSWORD:
+    DOCKER_PASSWORD:
       from_secret: docker_password
-  commands:
-    - export DOCKER_TAG=$(echo "${DRONE_TAG}" | sed -e 's/+/-/g')
-    - docker login -u $env:USERNAME -p $env:PASSWORD
-    - docker manifest create ${DOCKER_TAG} ${DOCKER_TAG}-amd64 ${DOCKER_TAG}-arm64 ${DOCKER_TAG}-arm
-    - docker manifest push ${DOCKER_TAG}
+  settings:
+    dry_run: true
+    dockerfile: Dockerfile.manifest
+    repo: "rancher/k3s-manifest"
+    build_args_from_env:
+    - DOCKER_USERNAME
+    - DOCKER_PASSWORD
+    - DRONE_TAG
   when:
     instance:
     - drone-publish.rancher.io

Dockerfile.manifest

+FROM golang:1.13.5-alpine3.10
+
+COPY --from=plugins/manifest:1.2.3 /bin/* /bin/
+
+ARG DOCKER_USERNAME
+ENV DOCKER_USERNAME $DOCKER_USERNAME
+
+ARG DOCKER_PASSWORD
+ENV DOCKER_PASSWORD $DOCKER_PASSWORD
+
+ARG DRONE_TAG
+ENV DRONE_TAG $DRONE_TAG
+
+COPY ./scripts/manifest /bin/
+
+RUN manifest

scripts/manifest

+#!/bin/sh
+
+if [ -z "${DRONE_TAG}" ]; then
+  echo "DRONE_TAG not defined" >&2
+  exit 1
+fi
+
+set -e -x
+
+export REPO="rancher/k3s"
+export DRONE_TAG=$(echo "${DRONE_TAG}" | sed -e 's/+/-/g')
+export PLUGIN_TARGET="${REPO}:${DRONE_TAG}"
+export PLUGIN_TEMPLATE="${REPO}:${DRONE_TAG}-ARCH"
+export PLUGIN_PLATFORMS="linux/amd64,linux/arm64,linux/arm"
+
+drone-manifest