Adapt CI to release milestones and release candidates

Author: snicoll

Diff for: ci/pipeline.yml

@@ -68,6 +68,15 @@ resources:
     repository: ((github-repo-name))
     base_branch: ((branch))
     ignore_paths: ["ci/*"]
+- name: github-pre-release
+  type: github-release
+  icon: briefcase-download-outline
+  source:
+    owner: spring-projects
+    repository: spring-retry
+    access_token: ((github-ci-release-token))
+    pre_release: true
+    release: false
 - name: github-release
   type: github-release
   icon: briefcase-download
@@ -173,6 +182,100 @@ jobs:
       params:
         path: git-repo
         status: failure
+- name: stage-milestone
+  serial: true
+  plan:
+  - get: ci-image
+  - get: git-repo
+    trigger: false
+  - task: stage
+    image: ci-image
+    file: git-repo/ci/tasks/stage.yml
+    params:
+      RELEASE_TYPE: M
+  - put: artifactory-repo
+    params:
+      <<: *artifactory-repo-put-params
+      repo: libs-staging-local
+  - put: git-repo
+    params:
+      repository: stage-git-repo
+- name: promote-milestone
+  serial: true
+  plan:
+  - get: ci-image
+  - get: git-repo
+    trigger: false
+  - get: artifactory-repo
+    trigger: false
+    passed: [stage-milestone]
+    params:
+      download_artifacts: false
+      save_build_info: true
+  - task: promote
+    image: ci-image
+    file: git-repo/ci/tasks/promote.yml
+    params:
+      RELEASE_TYPE: M
+      <<: *artifactory-task-params
+  - task: generate-changelog
+    file: git-repo/ci/tasks/generate-changelog.yml
+    params:
+      RELEASE_TYPE: M
+      GITHUB_USERNAME: ((github-username))
+      GITHUB_TOKEN: ((github-ci-release-token))
+  - put: github-pre-release
+    params:
+      name: generated-changelog/tag
+      tag: generated-changelog/tag
+      body: generated-changelog/changelog.md
+- name: stage-rc
+  serial: true
+  plan:
+  - get: ci-image
+  - get: git-repo
+    trigger: false
+  - task: stage
+    image: ci-image
+    file: git-repo/ci/tasks/stage.yml
+    params:
+      RELEASE_TYPE: RC
+  - put: artifactory-repo
+    params:
+      <<: *artifactory-repo-put-params
+      repo: libs-staging-local
+  - put: git-repo
+    params:
+      repository: stage-git-repo
+- name: promote-rc
+  serial: true
+  plan:
+  - get: ci-image
+  - get: git-repo
+    trigger: false
+  - get: artifactory-repo
+    trigger: false
+    passed: [stage-rc]
+    params:
+      download_artifacts: false
+      save_build_info: true
+  - task: promote
+    image: ci-image
+    file: git-repo/ci/tasks/promote.yml
+    params:
+      RELEASE_TYPE: RC
+      <<: *artifactory-task-params
+  - task: generate-changelog
+    file: git-repo/ci/tasks/generate-changelog.yml
+    params:
+      RELEASE_TYPE: RC
+      GITHUB_USERNAME: ((github-username))
+      GITHUB_TOKEN: ((github-ci-release-token))
+  - put: github-pre-release
+    params:
+      name: generated-changelog/tag
+      tag: generated-changelog/tag
+      body: generated-changelog/changelog.md
 - name: stage-release
   serial: true
   plan:
@@ -238,7 +341,7 @@ groups:
 - name: "build"
   jobs: ["build"]
 - name: "releases"
-  jobs: ["stage-release", "promote-release", "create-github-release"]
+  jobs: ["stage-milestone", "stage-rc", "stage-release", "promote-milestone", "promote-rc", "promote-release", "create-github-release"]
 - name: "ci-images"
   jobs: ["build-ci-image"]
 - name: "pull-requests"

Diff for: ci/scripts/stage.sh

@@ -13,8 +13,19 @@ git clone git-repo stage-git-repo > /dev/null
 pushd stage-git-repo > /dev/null
 
 snapshotVersion=$( get_revision_from_pom )
-stageVersion=$( get_next_release $snapshotVersion)
-nextVersion=$( bump_version_number $snapshotVersion)
+if [[ $RELEASE_TYPE = "M" ]]; then
+	stageVersion=$( get_next_milestone_release $snapshotVersion)
+	nextVersion=$snapshotVersion
+elif [[ $RELEASE_TYPE = "RC" ]]; then
+	stageVersion=$( get_next_rc_release $snapshotVersion)
+	nextVersion=$snapshotVersion
+elif [[ $RELEASE_TYPE = "RELEASE" ]]; then
+	stageVersion=$( get_next_release $snapshotVersion)
+	nextVersion=$( bump_version_number $snapshotVersion)
+else
+	echo "Unknown release type $RELEASE_TYPE" >&2; exit 1;
+fi
+
 echo "Staging $stageVersion (next version will be $nextVersion)"
 
 set_revision_to_pom "$stageVersion"

Diff for: ci/tasks/promote.yml

@@ -6,6 +6,7 @@ inputs:
 outputs:
 - name: version
 params:
+  RELEASE_TYPE:
   ARTIFACTORY_SERVER:
   ARTIFACTORY_USERNAME:
   ARTIFACTORY_PASSWORD:

Diff for: ci/tasks/stage.yml

@@ -5,6 +5,8 @@ inputs:
 outputs:
 - name: stage-git-repo
 - name: distribution-repository
+params:
+  RELEASE_TYPE:
 caches:
 - path: maven
 run: