fix gpg signing in CI

Author: poplers24

.github/workflows/publish-maven.yml

@@ -22,8 +22,11 @@ jobs:
           server-id: central
           server-username: MAVEN_USERNAME
           server-password: MAVEN_PASSWORD
-          gpg-private-key: ${{ secrets.GPG_PRIVATE_KEY }}
-          gpg-passphrase: ${{ secrets.GPG_PASSPHRASE }}
+
+      - name: Import GPG key
+        run: |
+          echo "${{ secrets.GPG_PRIVATE_KEY }}" | gpg --batch --import
+          gpg --list-secret-keys
 
       - name: Set project version from tag
         run: |
@@ -37,3 +40,4 @@ jobs:
         env:
           MAVEN_USERNAME: ${{ secrets.MAVEN_USERNAME }}
           MAVEN_PASSWORD: ${{ secrets.MAVEN_PASSWORD }}
+          GPG_PASSPHRASE: ${{ secrets.GPG_PASSPHRASE }}

pom.xml

@@ -136,7 +136,10 @@
                     </execution>
                 </executions>
                 <configuration>
+                    <useAgent>false</useAgent>
+                    <passphrase>${env.GPG_PASSPHRASE}</passphrase>
                     <gpgArguments>
+                        <arg>--batch</arg>
                         <arg>--pinentry-mode</arg>
                         <arg>loopback</arg>
                     </gpgArguments>