Also publish to Maven Central on new release creation

.github/workflows/publish.yml

@@ -1,9 +1,11 @@
-name: Publish to GitHub Packages
+name: Publish to GitHub Packages and Maven Central
 
 on:
   push:
     branches:
       - main
+  release:
+    types: [created]
 
 jobs:
   build:
@@ -26,3 +28,28 @@ jobs:
         run: mvn deploy
         env:
           GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+
+  publish-to-maven-central:
+    runs-on: ubuntu-latest
+    needs: build
+
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v3
+
+      - name: Set up JDK
+        uses: actions/setup-java@v3
+        with:
+          distribution: 'adopt'
+          java-version: '11'
+
+      - name: Build with Maven
+        run: mvn clean install
+
+      - name: Publish to Maven Central
+        run: mvn deploy
+        env:
+          OSSRH_USERNAME: ${{ secrets.OSSRH_USERNAME }}
+          OSSRH_PASSWORD: ${{ secrets.OSSRH_PASSWORD }}
+          GPG_PRIVATE_KEY: ${{ secrets.GPG_PRIVATE_KEY }}
+          GPG_PASSPHRASE: ${{ secrets.GPG_PASSPHRASE }}

README.md

@@ -1,6 +1,6 @@
 # nengen
 The 4th iteration of virtual cardboard's Java game engine. This LWJGL-based engine is an organized yet flexible alternative to LibGDX.
 
-## Automatic Deployment to GitHub Packages
+## Automatic Deployment to GitHub Packages and Maven Central
 
-This project is configured to automatically deploy to GitHub Packages using GitHub Actions on each commit to the `main` branch. No manual deployment steps are required.
+This project is configured to automatically deploy to GitHub Packages and Maven Central using GitHub Actions on each commit to the `main` branch. No manual deployment steps are required.

pom.xml

@@ -223,6 +223,29 @@
 					</includes>
 				</configuration>
 			</plugin>
+			<plugin>
+				<groupId>org.apache.maven.plugins</groupId>
+				<artifactId>maven-gpg-plugin</artifactId>
+				<version>1.6</version>
+				<executions>
+					<execution>
+						<id>sign-artifacts</id>
+						<phase>verify</phase>
+						<goals>
+							<goal>sign</goal>
+						</goals>
+					</execution>
+				</executions>
+			</plugin>
+			<plugin>
+				<groupId>org.apache.maven.plugins</groupId>
+				<artifactId>maven-deploy-plugin</artifactId>
+				<version>2.8.2</version>
+				<configuration>
+					<repositoryId>ossrh</repositoryId>
+					<url>https://oss.sonatype.org/service/local/staging/deploy/maven2/</url>
+				</configuration>
+			</plugin>
 		</plugins>
 	</build>
 
@@ -232,6 +255,14 @@
 			<name>GitHub Packages</name>
 			<url>https://maven.pkg.github.com/virtual-cardboard/nengen</url>
 		</repository>
+		<snapshotRepository>
+			<id>ossrh</id>
+			<url>https://oss.sonatype.org/content/repositories/snapshots</url>
+		</snapshotRepository>
+		<repository>
+			<id>ossrh</id>
+			<url>https://oss.sonatype.org/service/local/staging/deploy/maven2/</url>
+		</repository>
 	</distributionManagement>
 
 </project>

settings.xml

@@ -5,5 +5,10 @@
       <username>${env.GITHUB_ACTOR}</username>
       <password>${env.GITHUB_TOKEN}</password>
     </server>
+    <server>
+      <id>ossrh</id>
+      <username>${env.OSSRH_USERNAME}</username>
+      <password>${env.OSSRH_PASSWORD}</password>
+    </server>
   </servers>
 </settings>