Enable automated plugin releases (#230)

.github/dependabot.yml

@@ -1,7 +1,11 @@
 version: 2
 updates:
-  - package-ecosystem: "maven"
-    directory: "/"
+  - package-ecosystem: maven
+    directory: /
     open-pull-requests-limit: 3
     schedule:
-      interval: "daily"
+      interval: daily
+  - package-ecosystem: github-actions
+    directory: /
+    schedule:
+      interval: weekly

.github/workflows/cd.yml

@@ -0,0 +1,14 @@
+name: cd
+
+on:
+  workflow_dispatch:
+  check_run:
+    types:
+      - completed
+
+jobs:
+  maven-cd:
+    uses: jenkins-infra/github-reusable-workflows/.github/workflows/maven-cd.yml@v1
+    secrets:
+      MAVEN_USERNAME: ${{ secrets.MAVEN_USERNAME }}
+      MAVEN_TOKEN: ${{ secrets.MAVEN_TOKEN }}

.mvn/maven.config

@@ -1,2 +1,3 @@
 -Pconsume-incrementals
 -Pmight-produce-incrementals
+-Dchangelist.format=%d.v%s

docs/README.md

@@ -377,6 +377,20 @@ unclassified:
           prefix: (string)
 ```
 
+## Versioning
+
+Version tags for this plugin are of the format:
+
+```
+<major>.<autogenerated>
+```
+
+For example `1.55.v0fcce24a_9501`.
+
+The `<major>` prefix is incremented to indicate **breaking changes** in the plugin. When this happens, **please read the release notes and test the plugin extra carefully before deploying it to production.** To assist users of the Jenkins Update Center we will also add an `hpi.compatibleSinceVersion` annotation to the POM.
+
+The `<autogenerated>` part is created by the Jenkins [automated plugin release](https://www.jenkins.io/doc/developer/publishing/releasing-cd) system. This is incremented on any non-breaking (minor) change, e.g. new features, bug fixes, or dependency updates. It should normally be safe to adopt these changes straight away.
+
 ## Development
 
 ### Git

pom.xml

@@ -11,7 +11,7 @@
 
     <groupId>io.jenkins.plugins</groupId>
     <artifactId>aws-secrets-manager-credentials-provider</artifactId>
-    <version>${revision}${changelist}</version>
+    <version>${revision}.${changelist}</version>
     <packaging>hpi</packaging>
 
     <name>AWS Secrets Manager Credentials Provider</name>
@@ -41,8 +41,8 @@
     </scm>
 
     <properties>
-        <revision>1.2.1</revision>
-        <changelist>-SNAPSHOT</changelist>
+        <revision>1</revision>
+        <changelist>999999-SNAPSHOT</changelist>
         <java.level>8</java.level>
         <jenkins.version>2.289.3</jenkins.version>
     </properties>