Add a basic github release workflow

Author: richardhallett

.github/workflows/release.yml

@@ -0,0 +1,85 @@
+name: Release to production
+on:
+  release:
+    types: [published]
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v2
+      - name: Set up Docker Buildx
+        uses: docker/setup-buildx-action@v1
+      - name: Cache Docker layers
+        uses: actions/cache@v2
+        with:
+          path: /tmp/.buildx-cache
+          key: ${{ runner.os }}-buildx-${{ github.sha }}
+          restore-keys: |
+            ${{ runner.os }}-buildx-
+      - name: Login to GitHub Container Registry
+        uses: docker/login-action@v1
+        with:
+          registry: ghcr.io
+          username: ${{ github.repository_owner }}
+          password: ${{ secrets.GITHUB_TOKEN }}
+      - name: Get git tag
+        run: |
+          echo "::set-output name=GIT_TAG::$(git tag --points-at HEAD)"
+        id: set_git_vars
+      - name: Push to GitHub Packages
+        uses: docker/build-push-action@v2
+        with:
+          context: .
+          file: ./Dockerfile
+          push: true
+          tags: ghcr.io/${{ github.repository }}:${{ steps.set_git_vars.outputs.GIT_TAG }}
+          cache-from: type=local,src=/tmp/.buildx-cache
+          cache-to: type=local,dest=/tmp/.buildx-cache
+
+  deploy:
+    needs: [build]
+    runs-on: ubuntu-latest
+    env:
+      SLACK_WEBHOOK_URL: ${{ secrets.SLACK_WEBHOOK_URL }}
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v2
+
+      - name: Extract variables
+        shell: bash
+        run: |
+          echo "::set-output name=BRANCH::$(echo ${GITHUB_REF#refs/heads/} | sed 's/\//_/g')"
+          echo "::set-output name=TAG::$(git tag --points-at HEAD)"
+          echo "::set-output name=GIT_SHA::$(git rev-parse HEAD)"
+          echo "::set-output name=GIT_SHA_SHORT::$(git rev-parse --short HEAD)"
+        id: extract_variables
+
+      - name: Checkout terraform config repo
+        uses: actions/checkout@v2
+        with:
+          # public repo with terraform configuration
+          repository: 'datacite/mastino'
+          persist-credentials: false
+      - name: Commit changes to terraform config repository
+        # use go template in terraform config repository to update git sha and tag
+        # commit and push changes to trigger terraform workflow
+        run: |
+          export GIT_SHA=${{ steps.extract_variables.outputs.GIT_SHA_SHORT }}
+          export GIT_TAG=${{ steps.extract_variables.outputs.TAG }}
+          wget https://github.com/jwilder/dockerize/releases/download/v0.6.0/dockerize-linux-amd64-v0.6.0.tar.gz
+          tar -xzvf dockerize-linux-amd64-v0.6.0.tar.gz
+          rm dockerize-linux-amd64-v0.6.0.tar.gz
+          ./dockerize -template prod-eu-west/services/oai/_viringo.auto.tfvars.tmpl:prod-eu-west/services/oai/_viringo.auto.tfvars
+
+          git config --local user.email "action@github.com"
+          git config --local user.name "GitHub Action"
+          git add prod-eu-west/services/oai/_viringo.auto.tfvars
+          git commit -m "Adding viringo (oai) git variables for tag ${{ steps.extract_variables.outputs.GIT_TAG }}"
+      - name: Push changes
+        uses: ad-m/github-push-action@v0.6.0
+        with:
+          github_token: ${{ secrets.PERSONAL_ACCESS_TOKEN }}
+          repository: 'datacite/mastino'
+          branch: 'refs/heads/master'
+          tags: false