👷 Differentiate between Git branches and tags for Docker tags

Author: shnizzedy

.github/workflows/build_C-PAC.yml

@@ -32,6 +32,7 @@ jobs:
           username: ${{ github.actor }}
           password: ${{ secrets.GITHUB_TOKEN }}
       - name: Set tag & Dockerfile
+        if: github.ref_type == 'branch'
         run: |
           if [[ "${{ inputs.variant }}" != "" ]]
           then
@@ -66,6 +67,24 @@ jobs:
           echo DOCKER_TAG=$(echo "ghcr.io/${{ github.repository }}" | tr '[:upper:]' '[:lower:]'):$TAG >> $GITHUB_ENV
           echo DOCKERFILE="${DOCKERFILE}" >> $GITHUB_ENV
           cat $GITHUB_ENV
+      - name: Set tag & Dockerfile
+        if: github.ref_type == 'tag'
+        run: |
+          if [[ "${{ inputs.variant }}" != "" ]]
+          then
+            VARIANT=-${{ inputs.variant }}
+          fi
+          TAG=latest
+          if [[ $VARIANT == "" ]]
+          then
+            DOCKERFILE=Dockerfile
+          else
+            DOCKERFILE=variant$VARIANT.Dockerfile
+          fi
+          TAG=$TAG$VARIANT
+          echo DOCKER_TAG=$(echo "ghcr.io/${{ github.repository }}" | tr '[:upper:]' '[:lower:]'):$TAG >> $GITHUB_ENV
+          echo DOCKERFILE="${DOCKERFILE}" >> $GITHUB_ENV
+          cat $GITHUB_ENV
       - name: Prep Dockerfiles for forked repository
         if: ${{ github.repository_owner }} != 'FCP-INDI'
         run: .github/scripts/local_ghcr $DOCKERFILE ${{ github.repository_owner }} $DOCKER_TAG