Push image to GHCR on release or master update (#217)

resolves #214

Signed-off-by: Peter Engelbert <[email protected]>

Author: pmengelbert

.github/workflows/release.yml

@@ -0,0 +1,48 @@
+name: release
+
+on:
+  push:
+    branches:
+      - master
+    tags:
+      - v*
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v2
+      - name: setup go environment
+        uses: actions/setup-go@v1
+        with:
+          go-version: '1.15.6'
+      - name: Prepare
+        id: prepare
+        run: |
+          VERSION=${GITHUB_REF#refs/*/}
+          BRANCH_NAME=${GITHUB_REF#refs/heads/}
+          if [[ "${VERSION}" == "${BRANCH_NAME}" ]]; then
+            VERSION=$(git rev-parse --short HEAD)
+          fi
+          echo ::set-output name=version::${VERSION}
+          echo ::set-output name=ref::ghcr.io/${{ github.repository }}/conformance:${VERSION}
+      - name: Docker Build
+        run: |
+          docker build \
+            --build-arg VERSION=${{ steps.prepare.outputs.version }} \
+            -t ${{ steps.prepare.outputs.ref }} \
+            conformance/
+      - name: Docker Login
+        uses: docker/login-action@v1
+        with:
+          registry: ghcr.io
+          username: ${{ secrets.GHCR_USER }}
+          password: ${{ secrets.GHCR_TOKEN }}
+      - name: Docker Push
+        run: |
+          docker push ${{ steps.prepare.outputs.ref }}
+      - name: Clear
+        if: always()
+        run: |
+          rm -f ${HOME}/.docker/config.json

action.yml

@@ -8,4 +8,5 @@ inputs: {}
 outputs: {}
 runs:
   using: docker
+  # TODO: change to "docker://ghcr.io/opencontainers/distribution-spec/conformance:<TAG>"
   image: conformance/Dockerfile