Adding settings.xml to use for GitHub actions. For some reason, writing with the GITHUB_TOKEN has no permission to access it's own project repository.

Author: jscharp

.github/workflows/maven-publish.yml

@@ -29,6 +29,6 @@ jobs:
       run: mvn -B package --file pom.xml
 
     - name: Publish to GitHub Packages Apache Maven
-      run: mvn deploy
+      run: mvn deploy -s $GITHUB_WORKSPACE/settings.xml
       env:
         GITHUB_TOKEN: ${{ github.token }}

settings.xml

@@ -0,0 +1,36 @@
+<settings xmlns="http://maven.apache.org/SETTINGS/1.0.0"
+  xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+  xsi:schemaLocation="http://maven.apache.org/SETTINGS/1.0.0
+                      http://maven.apache.org/xsd/settings-1.0.0.xsd">
+
+  <activeProfiles>
+    <activeProfile>github</activeProfile>
+  </activeProfiles>
+
+  <profiles>
+    <profile>
+      <id>github</id>
+      <repositories>
+        <repository>
+          <id>central</id>
+          <url>https://repo1.maven.org/maven2</url>
+        </repository>
+        <repository>
+          <id>github</id>
+          <url>https://maven.pkg.github.com/Koppeltaal/*</url>
+          <snapshots>
+            <enabled>true</enabled>
+          </snapshots>
+        </repository>
+      </repositories>
+    </profile>
+  </profiles>
+
+  <servers>
+    <server>
+      <id>github</id>
+      <username>${env.SETTINGS_XML_USERNAME}</username>
+      <password>${env.SETTINGS_XML_PASSWORD}</password>
+    </server>
+  </servers>
+</settings>