Build component using reusable workflow

Signed-off-by: Eduardo Apolinario <[email protected]>

.github/workflows/component_docker_build.yml

@@ -0,0 +1,52 @@
+name: Build Component Docker Image
+
+on:
+  workflow_call:
+    inputs:
+      component:
+        required: true
+        type: string
+    outputs:
+      cache_key:
+        description: "Docker Cache key"
+        value: ${{ jobs.build_docker.outputs.cache_key }}
+jobs:
+  build_docker:
+    name: Build Docker Image
+    runs-on: ubuntu-latest
+    outputs:
+      cache_key: ${{ steps.cache_key.outputs.cache_key }}
+    defaults:
+      run:
+        working-directory: ${{ inputs.component }}
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v3
+      - id: load-docker-cache
+        name: Load Docker Cache
+        uses: actions/cache@v3
+        with:
+          path: /tmp/tmp/docker-images
+          key: /tmp/docker-images-${{ github.run_id }}
+          restore-keys: |
+            /tmp/docker-images-
+      - name: Set cache key output
+        id: cache_key
+        run: |
+          echo ::set-output name=cache_key::/tmp/docker-images-${{ github.run_id }}
+      - name: Prime docker cache
+        run: (docker load -i /tmp/tmp/docker-images/snapshot-builder.tar || true) && (docker load -i /tmp/tmp/docker-images/snapshot.tar || true)
+      - name: Build dockerfile
+        env:
+          # We are unable to leverage docker buildx here without changing the
+          # caching mechanism significantly. See here for the caching options
+          # available for docker buildx: https://docs.docker.com/engine/reference/commandline/buildx_build/#cache-from
+          # For now at least enable DOCKER_BUILDKIT for faster builds. Eventually we
+          # should rewrite this pipeline to use docker buildx with cache type=gha.
+          DOCKER_BUILDKIT: "1"
+        run: |
+          docker build -t ${{ github.repository_owner }}/${{ github.event.repository.name }}:builder --target builder --cache-from=${{ github.repository_owner }}/${{ inputs.component }}:builder .
+          docker build -t ${{ github.repository_owner }}/${{ inputs.component }}:latest --cache-from=${{ github.repository_owner }}/${{ inputs.component }}:builder .
+
+      - name: Tag and cache docker image
+        run: mkdir -p /tmp/tmp/docker-images && docker save ${{ github.repository_owner/${{ inputs.component }}:builder -o /tmp/tmp/docker-images/snapshot-builder.tar && docker save ${{ github.repository_owner/${{ inputs.component }}:latest -o /tmp/tmp/docker-images/snapshot.tar