Enable automated plugin release (#192)

.github/workflows/cd.yaml

@@ -0,0 +1,19 @@
+# Note: additional setup is required, see https://www.jenkins.io/redirect/continuous-delivery-of-plugins
+
+name: cd
+on:
+  workflow_dispatch:
+  check_run:
+    types:
+      - completed
+
+permissions:
+  checks: read
+  contents: write
+
+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 +1,4 @@
 -Pconsume-incrementals
 -Pmight-produce-incrementals
+-Dchangelist.format=%d.v%s
+

pom.xml

@@ -9,7 +9,7 @@
   </parent>
   <groupId>io.jenkins.plugins</groupId>
   <artifactId>theme-manager</artifactId>
-  <version>${revision}${changelist}</version>
+  <version>${changelist}</version>
   <packaging>hpi</packaging>
   <name>Theme Manager</name>
   <url>https://github.com/jenkinsci/${project.artifactId}-plugin</url>
@@ -28,8 +28,7 @@
     <url>https://github.com/jenkinsci/${project.artifactId}-plugin</url>
   </scm>
   <properties>
-    <revision>1.7</revision>
-    <changelist>-SNAPSHOT</changelist>
+    <changelist>999999-SNAPSHOT</changelist>
     <jenkins.version>2.361.4</jenkins.version>
     <spotless.check.skip>false</spotless.check.skip>
   </properties>