Adding the posibility to build snapshot releases

.github/workflows/deploy.yml

@@ -14,20 +14,39 @@ jobs:
 
     steps:
     - uses: actions/checkout@v2
+
     - name: Set up JDK 11
       uses: actions/setup-java@v1
       with:
         java-version: 11
         server-id: openconext-releases
         server-username: MAVEN_USERNAME
         server-password: MAVEN_PASSWORD
+
     - name: Set up cache
       uses: actions/cache@v1
       with:
         path: ~/.m2/repository
         key: ${{ runner.os }}-maven-${{ hashFiles('**/pom.xml') }}
         restore-keys: |
           ${{ runner.os }}-maven-
+
+    - name: Determine the version
+      run: echo ::set-output name=version::$(mvn -q -Dexec.executable=echo -Dexec.args='${project.version}' --non-recursive exec:exec)
+      id: versioncheck
+
+    - name: Exit when workflow_dispatch is triggered, and the version does not contain SNAPSHOT in it's name
+      run: |
+        echo "Only SNAPSHOT releases can be triggered with the workflow_dispatch"
+        exit 1
+      if: github.event_name == 'workflow_dispatch' && ( !endsWith(steps.versioncheck.outputs.version, '-SNAPSHOT'))
+
+    - name: Exit when a production build is triggered, and the github tag is not the same as the version in pom.xml
+      run: |
+        echo "Project version ${{ steps.versioncheck.outputs.version }} does not match git tag ${{ github.ref_name }}"
+        exit 1
+      if: github.event_name != 'workflow_dispatch' && steps.versioncheck.outputs.version != github.ref_name
+
     - name: Deploy with Maven
       run: mvn --batch-mode deploy -DskipTests
       env:
@@ -52,4 +71,4 @@ jobs:
         platforms: linux/amd64
         push: true
         tags: |
-          ghcr.io/openconext/openconext-oidcng/oidcng-server:${{ github.ref_name }}
+          ghcr.io/openconext/openconext-oidcng/oidcng-server:${{ steps.versioncheck.outputs.version }}