Build CI image using oci-build-task resource

Author: bclozel

ci/parameters.yml

@@ -8,4 +8,7 @@ milestone: "5.3.x"
 build-name: "spring-framework"
 pipeline-name: "spring-framework"
 concourse-url: "https://ci.spring.io"
+registry-mirror-host: docker.repo.spring.io
+registry-mirror-username: ((artifactory-username))
+registry-mirror-password: ((artifactory-password))
 task-timeout: 1h00m

ci/pipeline.yml

@@ -24,6 +24,10 @@ anchors:
     username: ((docker-hub-username))
     password: ((docker-hub-password))
     tag: ((milestone))
+  registry-mirror-vars: &registry-mirror-vars
+    registry-mirror-host: ((registry-mirror-host))
+    registry-mirror-username: ((registry-mirror-username))
+    registry-mirror-password: ((registry-mirror-password))
   slack-fail-params: &slack-fail-params
     text: >
       :concourse-failed: <https://ci.spring.io/teams/${BUILD_TEAM_NAME}/pipelines/${BUILD_PIPELINE_NAME}/jobs/${BUILD_JOB_NAME}/builds/${BUILD_NAME}|${BUILD_PIPELINE_NAME} ${BUILD_JOB_NAME} failed!>
@@ -162,13 +166,20 @@ resources:
 jobs:
 - name: build-ci-images
   plan:
-  - get: ci-images-git-repo
-    trigger: true
-  - in_parallel:
+    - get: git-repo
+    - get: ci-images-git-repo
+      trigger: true
+    - task: build-ci-image
+      privileged: true
+      file: git-repo/ci/tasks/build-ci-image.yml
+      output_mapping:
+        image: ci-image
+      vars:
+        ci-image-name: ci-image
+        <<: *registry-mirror-vars
     - put: ci-image
       params:
-        build: ci-images-git-repo/ci/images
-        dockerfile: ci-images-git-repo/ci/images/ci-image/Dockerfile
+        image: ci-image/image.tar
 - name: build
   serial: true
   public: true

ci/scripts/sync-to-maven-central.sh

@@ -0,0 +1,31 @@
+---
+platform: linux
+image_resource:
+  type: registry-image
+  source:
+    repository: concourse/oci-build-task
+    tag: 0.9.1
+    registry_mirror:
+      host: ((registry-mirror-host))
+      username: ((registry-mirror-username))
+      password: ((registry-mirror-password))
+inputs:
+  - name: ci-images-git-repo
+outputs:
+  - name: image
+caches:
+  - path: ci-image-cache
+params:
+  CONTEXT: ci-images-git-repo/ci/images
+  DOCKERFILE: ci-images-git-repo/ci/images/ci-image/Dockerfile
+  DOCKER_HUB_AUTH: ((docker-hub-auth))
+run:
+  path: /bin/sh
+  args:
+    - "-c"
+    - |
+      mkdir -p /root/.docker
+      cat > /root/.docker/config.json <<EOF
+      { "auths": { "https://index.docker.io/v1/": { "auth": "$DOCKER_HUB_AUTH" }}}
+      EOF
+      build