Docker: Unify the GitHub actions into a single action that uses a build matrix.

Author: brycelelbach

.github/workflows/build-brev-cuda-cpp-tutorial-docker-image.yml

@@ -0,0 +1,92 @@
+name: Build and Push Brev Tutorial Docker Images
+
+on:
+  push:
+    branches:
+      - brev-reorg
+
+jobs:
+  discover-tutorials:
+    runs-on: ubuntu-latest
+    outputs:
+      tutorials: ${{ steps.find-tutorials.outputs.tutorials }}
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v4
+
+      - name: Find tutorial directories
+        id: find-tutorials
+        run: |
+          tutorials=$(find . -maxdepth 1 -type d -name '*-tutorial' -printf '%f\n' | jq -R -s -c 'split("\n") | map(select(length > 0))')
+          echo "tutorials=${tutorials}" >> $GITHUB_OUTPUT
+          echo "Found tutorials: ${tutorials}"
+
+  build-and-push:
+    needs: discover-tutorials
+    runs-on: ubuntu-latest
+    permissions:
+      contents: read
+      packages: write
+    strategy:
+      matrix:
+        tutorial: ${{ fromJson(needs.discover-tutorials.outputs.tutorials) }}
+      fail-fast: false
+
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v4
+
+      - name: Get branch name
+        run: echo "GIT_BRANCH_NAME=${GITHUB_REF#refs/heads/}" >> $GITHUB_ENV
+
+      - name: Set image name
+        id: set-image
+        run: |
+          image_name="ghcr.io/${{ github.repository_owner }}/${{ matrix.tutorial }}"
+          echo "image_name=${image_name,,}" >> $GITHUB_OUTPUT
+
+      - name: Check for HPCCM recipe
+        id: check-hpccm
+        run: |
+          if [ -f "${{ matrix.tutorial }}/brev/docker-recipe.py" ]; then
+            echo "has_hpccm=true" >> $GITHUB_OUTPUT
+          else
+            echo "has_hpccm=false" >> $GITHUB_OUTPUT
+          fi
+
+      - name: Set up Python (for HPCCM)
+        if: steps.check-hpccm.outputs.has_hpccm == 'true'
+        uses: actions/setup-python@v4
+        with:
+          python-version: '3.x'
+
+      - name: Install HPCCM
+        if: steps.check-hpccm.outputs.has_hpccm == 'true'
+        run: |
+          python -m pip install --upgrade pip
+          pip install hpccm
+
+      - name: Generate Dockerfile from HPCCM recipe
+        if: steps.check-hpccm.outputs.has_hpccm == 'true'
+        run: |
+          hpccm --recipe ${{ matrix.tutorial }}/brev/docker-recipe.py --format docker > ${{ matrix.tutorial }}/brev/dockerfile
+
+      - name: Log in to GitHub Container Registry
+        uses: docker/login-action@v3
+        with:
+          registry: ghcr.io
+          username: ${{ github.actor }}
+          password: ${{ secrets.GITHUB_TOKEN }}
+
+      - name: Build Docker image with Compose
+        run: docker compose -f ${{ matrix.tutorial }}/brev/docker-compose.yml build
+
+      - name: Tag Docker images
+        run: |
+          docker tag "${{ steps.set-image.outputs.image_name }}:${GIT_BRANCH_NAME}-latest" "${{ steps.set-image.outputs.image_name }}:${GIT_BRANCH_NAME}-latest"
+          docker tag "${{ steps.set-image.outputs.image_name }}:${GIT_BRANCH_NAME}-latest" "${{ steps.set-image.outputs.image_name }}:${GIT_BRANCH_NAME}-git-${GITHUB_SHA::7}"
+
+      - name: Push Docker images
+        run: |
+          docker push "${{ steps.set-image.outputs.image_name }}:${GIT_BRANCH_NAME}-latest"
+          docker push "${{ steps.set-image.outputs.image_name }}:${GIT_BRANCH_NAME}-git-${GITHUB_SHA::7}"