checking for existing docker tags

Author: LucaMarconato

.github/workflows/build_image.yml

@@ -2,9 +2,6 @@ name: Build Docker image
 
 on:
     workflow_run:
-        workflows: ["Release"]
-        types:
-            - completed
     workflow_dispatch:
     push:
 
@@ -18,7 +15,7 @@ concurrency:
 
 jobs:
     build:
-        if: ${{ github.event_name == 'workflow_run' && github.event.workflow_run.conclusion == 'success' && startsWith(github.ref, 'refs/tags/v') || github.event_name == 'workflow_dispatch' || github.event_name == 'push' }}
+        if: ${{ github.event_name == 'workflow_dispatch' || github.event_name == 'push' }}
         runs-on: ubuntu-latest
 
         defaults:
@@ -28,7 +25,7 @@ jobs:
         permissions:
             contents: read
             packages: write
-            attestations: write
+            attestation: write
             id-token: write
 
         steps:
@@ -53,14 +50,42 @@ jobs:
                   echo "SPATIALDATA_IO_VERSION=${SPATIALDATA_IO_VERSION}" >> $GITHUB_ENV
                   echo "SPATIALDATA_PLOT_VERSION=${SPATIALDATA_PLOT_VERSION}" >> $GITHUB_ENV
 
+            - name: Check if image tag exists
+              id: check_tag
+              env:
+                  IMAGE_TAG: ${{ env.REGISTRY }}/scverse/spatialdata:spatialdata${{ env.SPATIALDATA_VERSION }}_spatialdata-io${{ env.SPATIALDATA_IO_VERSION }}_spatialdata-plot${{ env.SPATIALDATA_PLOT_VERSION }}
+                  GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+              run: |
+                  # Define the API URL
+                  API_URL="https://api.github.com/orgs/scverse/packages/container/spatialdata/versions"
+
+                  # Fetch all existing versions
+                  existing_tags=$(curl -s -H "Authorization: token $GITHUB_TOKEN" $API_URL | jq -r '.[].metadata.container.tags[]')
+
+                  # Debug: Output all existing tags
+                  echo "Existing tags:"
+                  echo "$existing_tags"
+
+                  # Check if the constructed tag exists
+                  if echo "$existing_tags" | grep -q "$IMAGE_TAG"; then
+                    echo "Image tag $IMAGE_TAG already exists. Skipping build."
+                    echo "skip_build=true" >> $GITHUB_ENV
+                  else
+                    echo "Image tag $IMAGE_TAG does not exist. Proceeding with build."
+                    echo "skip_build=false" >> $GITHUB_ENV
+                    echo "IMAGE_TAG=${IMAGE_TAG}" >> $GITHUB_ENV
+                  fi
+
             - name: Login to GitHub Container Registry
+              if: ${{ env.skip_build == 'false' }}
               uses: docker/login-action@v3
               with:
                   registry: ${{ env.REGISTRY }}
                   username: ${{ github.actor }}
                   password: ${{ secrets.GITHUB_TOKEN }}
 
             - uses: docker/build-push-action@v5
+              if: ${{ env.skip_build == 'false' }}
               with:
                   context: .
                   file: ./Dockerfile
@@ -71,4 +96,4 @@ jobs:
                       SPATIALDATA_VERSION=${{ env.SPATIALDATA_VERSION }}
                       SPATIALDATA_IO_VERSION=${{ env.SPATIALDATA_IO_VERSION }}
                       SPATIALDATA_PLOT_VERSION=${{ env.SPATIALDATA_PLOT_VERSION }}
-                  tags: ${{ env.REGISTRY }}/scverse/spatialdata:spatialdata${{ env.SPATIALDATA_VERSION }}_spatialdata-io${{ env.SPATIALDATA_IO_VERSION }}_spatialdata-plot${{ env.SPATIALDATA_PLOT_VERSION }}
+                  tags: ${{ env.IMAGE_TAG }}