Fix snapshot publishing

Motivation:
Enable snapshot publishing again.

Modification:
Add a distribution management section to the pom.xml file, that enables `-SNAPSHOT` distribution.
This follows the guidance from https://central.sonatype.org/publish/publish-portal-snapshots/#enabling-snapshot-releases-for-your-namespace

Move the maven settings actions to after the java installer action, to
avoid it being overwritten in the install.

Also add the central-snapshot server with username and password to allow
publishing snapshots.

Result:
Snapshot releases works again.

Author: chrisvest

.github/workflows/ci-deploy.yml

@@ -32,14 +32,6 @@ jobs:
   deploy:
     runs-on: ubuntu-latest
     steps:
-      - uses: s4u/maven-settings-action@v3.0.0
-        with:
-          servers: |
-            [{
-                "id": "central",
-                "username": "${{ secrets.MAVEN_CENTRAL_USERNAME }}",
-                "password": "${{ secrets.MAVEN_CENTRAL_PASSWORD }}"
-            }]
 
       - uses: actions/checkout@v4
 
@@ -49,6 +41,21 @@ jobs:
           distribution: 'zulu'
           java-version: '8'
 
+      - uses: s4u/maven-settings-action@v3.0.0
+        with:
+          githubServer: false
+          servers: |
+            [{
+                "id": "central",
+                "username": "${{ secrets.MAVEN_CENTRAL_USERNAME }}",
+                "password": "${{ secrets.MAVEN_CENTRAL_PASSWORD }}"
+            },
+            {
+                "id": "central-portal-snapshots",
+                "username": "${{ secrets.MAVEN_CENTRAL_USERNAME }}",
+                "password": "${{ secrets.MAVEN_CENTRAL_PASSWORD }}"
+            }]
+
       # Cache .m2/repository
       - uses: actions/cache@v4
         continue-on-error: true

pom.xml

@@ -45,6 +45,20 @@
     </licenses>
     <inceptionYear>2021</inceptionYear>
 
+    <distributionManagement>
+        <snapshotRepository>
+            <name>Central Portal Snapshots</name>
+            <id>central-portal-snapshots</id>
+            <url>https://central.sonatype.com/repository/maven-snapshots/</url>
+            <releases>
+                <enabled>false</enabled>
+            </releases>
+            <snapshots>
+                <enabled>true</enabled>
+            </snapshots>
+        </snapshotRepository>
+    </distributionManagement>
+
     <scm>
         <url>https://github.com/netty/netty-incubator-h3spec-maven-plugin</url>
         <connection>scm:git:git://github.com/netty/netty-incubator-h3spec-maven-plugin.git</connection>
@@ -224,16 +238,6 @@
                     </execution>
                 </executions>
             </plugin>
-            <plugin>
-                <groupId>org.sonatype.central</groupId>
-                <artifactId>central-publishing-maven-plugin</artifactId>
-                <version>0.7.0</version>
-                <extensions>true</extensions>
-                <configuration>
-                    <publishingServerId>central</publishingServerId>
-                    <centralSnapshotsUrl>https://central.sonatype.com/repository/maven-snapshots/</centralSnapshotsUrl>
-                </configuration>
-            </plugin>
             <plugin>
                 <artifactId>maven-release-plugin</artifactId>
                 <version>2.5.3</version>