Use a separate job to set a common date tag.

Author: jblueh

.github/workflows/docker-image-upload.yml

@@ -9,10 +9,19 @@ on:
       - 'master'
 
 jobs:
-  build-su2:
+  date-tag:
     runs-on: ubuntu-latest
     outputs:
       date_tag: ${{ steps.vars.outputs.date_tag }}
+    steps:
+      - name: Set variables
+        id: vars
+        run: echo "::set-output name=date_tag::$(date +%y%m%d-%H%M)"
+
+  build-su2:
+    needs: ['date-tag']
+    if: ${{ always() && !(contains(needs.*.result, 'failure')) }}
+    runs-on: ubuntu-latest
     steps:
       - name: Checkout
         uses: actions/checkout@v2
@@ -32,21 +41,17 @@ jobs:
           username: ${{ github.actor }}
           password: ${{ secrets.GITHUB_TOKEN }}
 
-      - name: Set variables
-        id: vars
-        run: echo "::set-output name=date_tag::$(date +%y%m%d-%H%M)"
-
       - name: Docker Buildx Create
         run: docker buildx create --use
 
       - name: Build and push build-su2
-        run: docker buildx build --platform=linux/amd64 --platform=linux/arm64 -t ghcr.io/${{ github.repository_owner }}/su2/build-su2:${{ steps.vars.outputs.date_tag }} --push ./build/
+        run: docker buildx build --platform=linux/amd64 --platform=linux/arm64 -t ghcr.io/${{ github.repository_owner }}/su2/build-su2:${{ needs.date-tag.outputs.date_tag }} --push ./build/
 
       - name: Build and push build-su2-tsan
-        run: docker buildx build --platform=linux/amd64 --platform=linux/arm64 -t ghcr.io/${{ github.repository_owner }}/su2/build-su2-tsan:${{ steps.vars.outputs.date_tag }} --push --file ./build/Dockerfile.tsan ./build/
+        run: docker buildx build --platform=linux/amd64 --platform=linux/arm64 -t ghcr.io/${{ github.repository_owner }}/su2/build-su2-tsan:${{ needs.date-tag.outputs.date_tag }} --push --file ./build/Dockerfile.tsan ./build/
 
   test-su2:
-    needs: [build-su2]
+    needs: [date-tag, build-su2]
     if: ${{ always() && !(contains(needs.*.result, 'failure')) }}
     runs-on: ubuntu-latest
     steps:
@@ -72,13 +77,13 @@ jobs:
         run: docker buildx create --use
 
       - name: Build and push test-su2
-        run: docker buildx build --platform=linux/amd64 --platform=linux/arm64 --build-arg BASE_IMAGE=ghcr.io/${{ github.repository_owner }}/su2/build-su2:${{ needs.build-su2.outputs.date_tag }} -t ghcr.io/${{ github.repository_owner }}/su2/test-su2:${{ needs.build-su2.outputs.date_tag }} --push ./test/
+        run: docker buildx build --platform=linux/amd64 --platform=linux/arm64 --build-arg BASE_IMAGE=ghcr.io/${{ github.repository_owner }}/su2/build-su2:${{ needs.date-tag.outputs.date_tag }} -t ghcr.io/${{ github.repository_owner }}/su2/test-su2:${{ needs.date-tag.outputs.date_tag }} --push ./test/
 
       - name: Build and push test-su2-tsan
-        run: docker buildx build --platform=linux/amd64 --platform=linux/arm64 --build-arg BASE_IMAGE=ghcr.io/${{ github.repository_owner }}/su2/build-su2-tsan:${{ needs.build-su2.outputs.date_tag }} -t ghcr.io/${{ github.repository_owner }}/su2/test-su2-tsan:${{ needs.build-su2.outputs.date_tag }} --push ./test/
+        run: docker buildx build --platform=linux/amd64 --platform=linux/arm64 --build-arg BASE_IMAGE=ghcr.io/${{ github.repository_owner }}/su2/build-su2-tsan:${{ needs.date-tag.outputs.date_tag }} -t ghcr.io/${{ github.repository_owner }}/su2/test-su2-tsan:${{ needs.date-tag.outputs.date_tag }} --push ./test/
 
   cross-build-su2-mac:
-    needs: [build-su2]
+    needs: [date-tag, build-su2]
     if: ${{ always() && !(contains(needs.*.result, 'failure')) }}
     runs-on: ubuntu-latest
     steps:
@@ -104,7 +109,7 @@ jobs:
         run: docker buildx create --use
 
       - name: Build and push build-su2-cross
-        run: docker buildx build --platform=linux/amd64 --platform=linux/arm64 --build-arg BASE_IMAGE=ghcr.io/${{ github.repository_owner }}/su2/build-su2:${{ needs.build-su2.outputs.date_tag }} -t ghcr.io/${{ github.repository_owner }}/su2/build-su2-cross-stage1:${{ needs.build-su2.outputs.date_tag }} --push --file ./build_cross/Dockerfile.stage1 ./build_cross/
+        run: docker buildx build --platform=linux/amd64 --platform=linux/arm64 --build-arg BASE_IMAGE=ghcr.io/${{ github.repository_owner }}/su2/build-su2:${{ needs.date-tag.outputs.date_tag }} -t ghcr.io/${{ github.repository_owner }}/su2/build-su2-cross-stage1:${{ needs.date-tag.outputs.date_tag }} --push --file ./build_cross/Dockerfile.stage1 ./build_cross/
 
   cross-build-su2-linux:
     needs: [build-su2, cross-build-su2-mac]
@@ -133,4 +138,4 @@ jobs:
         run: docker buildx create --use
 
       - name: Build and push build-su2-cross
-        run: docker buildx build --platform=linux/amd64 --platform=linux/arm64 --build-arg BASE_IMAGE=ghcr.io/${{ github.repository_owner }}/su2/build-su2-cross-stage1:${{ needs.build-su2.outputs.date_tag }} -t ghcr.io/${{ github.repository_owner }}/su2/build-su2-cross:${{ needs.build-su2.outputs.date_tag }} --push --file ./build_cross/Dockerfile.stage2 ./build_cross/
+        run: docker buildx build --platform=linux/amd64 --platform=linux/arm64 --build-arg BASE_IMAGE=ghcr.io/${{ github.repository_owner }}/su2/build-su2-cross-stage1:${{ needs.date-tag.outputs.date_tag }} -t ghcr.io/${{ github.repository_owner }}/su2/build-su2-cross:${{ needs.date-tag.outputs.date_tag }} --push --file ./build_cross/Dockerfile.stage2 ./build_cross/