workflows: push also caches joystream-node image

.github/workflows/run-network-tests-push.yml

@@ -16,19 +16,50 @@ jobs:
         with:
           username: ${{ secrets.DOCKERHUB_USERNAME }}
           password: ${{ secrets.DOCKERHUB_PASSWORD }}
+
+      - id: compute_shasum
+        name: Compute runtime code shasum
+        run: |
+          export RUNTIME_CODE_SHASUM=`scripts/runtime-code-shasum.sh`
+          echo "::set-output name=shasum::${RUNTIME_CODE_SHASUM}"
+
+      - name: Setup cache directory
+        run: mkdir ~/docker-images
+
+      - name: Docker images cache
+        uses: actions/cache@v2
+        env:
+          cache-name: joystream-node-docker
+        with:
+          path: ~/docker-images
+          key: ${{ env.cache-name }}-${{ steps.compute_shasum.outputs.shasum }}
+
       - id: docker_build
         name: Build and publish docker images
+        env:
+          RUNTIME_CODE_SHASUM: ${{ steps.compute_shasum.outputs.shasum }}
         run: |
-          export RUNTIME_CODE_SHASUM=`scripts/runtime-code-shasum.sh`
           function docker_tag_exists() {
             curl --silent -f -lSL https://index.docker.io/v1/repositories/joystream/node/tags/$1 > /dev/null
           }
-          if ! docker_tag_exists ${RUNTIME_CODE_SHASUM}; then
-              docker-compose build
-              docker image tag joystream/node joystream/node:${RUNTIME_CODE_SHASUM}
-              docker push joystream/node:${RUNTIME_CODE_SHASUM}
+
+          if docker_tag_exists ${{ env.RUNTIME_CODE_SHASUM }}; then
+            export JOYSTREAM_NODE_TAG=${{ env.RUNTIME_CODE_SHASUM }}
+            docker pull joystream/node:${JOYSTREAM_NODE_TAG}
+            docker image tag joystream/node:${JOYSTREAM_NODE_TAG} joystream/node:latest
+          else
+            export JOYSTREAM_NODE_TAG=latest
+            docker-compose build
+            docker image tag joystream/node joystream/node:${{ env.RUNTIME_CODE_SHASUM }}
+            docker push joystream/node:${{ env.RUNTIME_CODE_SHASUM }}
           fi
-          echo "::set-output name=tag::${RUNTIME_CODE_SHASUM}"
+
+          # update cache
+          docker save --output joystream-node-docker-image.tar joystream/node:latest
+          gzip joystream-node-docker-image.tar
+          cp joystream-node-docker-image.tar.gz ~/docker-images/
+
+          echo "::set-output name=tag::${{ env.RUNTIME_CODE_SHASUM }}"
 
   run_network_tests_1:
     name: Network Integration Runtime Tests

scripts/runtime-code-shasum.sh

@@ -1,5 +1,7 @@
 #!/usr/bin/env bash
 
+# Compute a hash over files related to building joystream/node docker image
+
 # Cargo workspace root
 export WORKSPACE_ROOT=`cargo metadata --offline --no-deps --format-version 1 | jq .workspace_root -r`
 
@@ -11,6 +13,11 @@ cd ${WORKSPACE_ROOT}
 # Install gnu-tar with brew
 #   brew install gnu-tar
 #   export PATH="/usr/local/opt/gnu-tar/libexec/gnubin:$PATH"
-tar -c --sort=name --owner=root:0 --group=root:0 --mtime='UTC 2020-01-01' Cargo.lock Cargo.toml \
-    runtime runtime-modules utils/chain-spec-builder | shasum | cut -d " " -f 1
+tar -c --sort=name --owner=root:0 --group=root:0 --mtime='UTC 2020-01-01' \
+    Cargo.lock \
+    Cargo.toml \
+    runtime \
+    runtime-modules \
+    utils/chain-spec-builder \
+    joystream-node.Dockerfile | shasum | cut -d " " -f 1