tag docker image with branch name and git tags

.github/workflows/docker-build-n-push.yml

@@ -2,8 +2,10 @@ name: Build and push Docker image
 
 on:
   push:
-    branches: [current, feb12]
+    branches: [current, test]
 
+env:
+  image_base: ghcr.io/agicommies/subspace
 
 jobs:
   build-n-push:
@@ -25,10 +27,18 @@ jobs:
         username: ${{ github.actor }}
         password: ${{ secrets.GITHUB_TOKEN }}
 
+    - name: Compute image names for commit tags
+      run: |
+        tags=$(git tag --contains ${{ steps.commit.outputs.short }})
+        image_names=$(<<< $tags xargs -I {_} printf "$image_base:{_}\n")
+        echo tags_image_names=$image_names | tee -a $GITHUB_ENV
+
     - name: Build and push
       uses: docker/build-push-action@v5
       with:
         context: .
         push: true
-        tags: ghcr.io/agicommies/subspace:${{ steps.commit.outputs.short }}
-        # , ghcr.io/agicommies/subspace:latest
+        tags: |
+          ${{ env.image_base }}:${{ steps.commit.outputs.short }}
+          ${{ env.image_base }}:${{ github.head_ref || github.ref_name }}
+          ${{ env.tags_image_names }}

.github/workflows/docker-retag.yml

@@ -0,0 +1,35 @@
+name: Tag docker image with git tags
+
+on:
+  push:
+    tags: ["*"]
+
+env:
+  image_base: ghcr.io/agicommies/subspace
+
+jobs:
+  tag-docker-image:
+    permissions: write-all
+    runs-on: ubuntu-latest
+
+    steps:
+      - id: commit
+        uses: prompt/actions-commit-hash@v3
+
+      - name: Docker Login
+        uses: docker/[email protected]
+        with:
+          registry: ghcr.io
+          username: ${{ github.actor }}
+          password: ${{ secrets.GITHUB_TOKEN }}
+
+      - name: Checks if docker image is on registry
+        env:
+          image_of_commit: $image_base:${{ steps.commit.outputs.short }}
+        run: |
+          image_exists_check=$(docker manifest inspect "$image_of_commit" > /dev/null 2>&1; echo $?)
+
+          if [ $image_exists_check -eq 0 ]; then
+            echo "Image exists. Tagging with `${{ github.ref_name }}`"
+            docker buildx imagetools create "$image_of_commit" --tag "$image_base:${{ github.ref_name }}"
+          fi