Overhauls image management process to use a single branch

Signed-off-by: Sean Sundberg <seansund@us.ibm.com>

Author: Sean Sundberg

.github/release-drafter-lite.yaml

@@ -3,18 +3,31 @@ name: Docker build
 # Controls when the workflow will run
 on:
   push:
-    branches:
-      - 'v*.*'
+    branches: [ main ]
   release:
     types:
       - published
   pull_request:
     branches:
-      - 'v*.*'
+      - main
 
 jobs:
   build:
     runs-on: ubuntu-latest
+
+    strategy:
+      matrix:
+        base:
+          - alpine
+          - fedora
+        terraform:
+          - v1.0
+          - v1.1
+          - v1.2
+
+    env:
+      TERRAFORM_LATEST: "v1.2"
+
     steps:
       - name: Checkout
         uses: actions/checkout@v3
@@ -39,7 +52,62 @@ jobs:
           username: ${{ secrets.QUAY_CNTK_USERNAME }}
           password: ${{ secrets.QUAY_CNTK_TOKEN }}
 
-      - name: Docker CNTK meta
+      - name: Setup variables ${{ matrix.base }}:${{ matrix.terraform }}
+        id: variables
+        shell: bash
+        run: |
+          SHORT_TERRAFORM=${{ matrix.terraform }}
+          
+          SHORT_TAG_ENABLED="false"
+          if [[ "${{ matrix.base }}" == "alpine" ]]; then
+            SHORT_TAG_ENABLED="true"
+          fi
+          
+          BASE_ENABLED="false"
+          LATEST_ENABLED="false"
+          if [[ "${SHORT_TERRAFORM}" == "${TERRAFORM_LATEST}" ]]; then
+            BASE_ENABLED="true"
+            
+            if [[ "${{ matrix.base }}" == "alpine" ]]; then
+              LATEST_ENABLED="true"
+            fi
+          fi
+          
+          RELEASE_TAG=${GITHUB_REF#refs/tags/}
+          RELEASE_TAG_ENABLED="false"
+          RELEASE_TAG_SHORT_ENABLED="false"
+          if [[ "${GITHUB_REF}" =~ refs/tags ]] && [[ "${RELEASE_TAG}" != "main" ]]; then
+            RELEASE_TAG_ENABLED="true"
+          
+            if [[ "${{ matrix.base }}" == "alpine" ]]; then
+              RELEASE_TAG_SHORT_ENABLED="true"
+            fi
+          else
+            RELEASE_TAG="main"
+          fi
+          
+          echo "Short terraform: ${SHORT_TERRAFORM}"
+          echo "::set-output name=terraform::$SHORT_TERRAFORM"
+          
+          echo "Short tag enabled: $SHORT_TAG_ENABLED"
+          echo "::set-output name=short-enabled::$SHORT_TAG_ENABLED"
+          
+          echo "Release tag: ${RELEASE_TAG}"
+          echo "::set-output name=release-tag::$RELEASE_TAG"
+          
+          echo "Release tag enabled: $RELEASE_TAG_ENABLED"
+          echo "::set-output name=release-tag-enabled::$RELEASE_TAG_ENABLED"
+          
+          echo "Release tag short enabled: $RELEASE_TAG_SHORT_ENABLED"
+          echo "::set-output name=release-tag-short-enabled::$RELEASE_TAG_SHORT_ENABLED"
+          
+          echo "Base enabled: $BASE_ENABLED"
+          echo "::set-output name=base-enabled::$BASE_ENABLED"
+          
+          echo "Latest enabled: $LATEST_ENABLED"
+          echo "::set-output name=latest-enabled::$LATEST_ENABLED"
+
+      - name: Docker CNTK meta ${{ matrix.base }}:${{ matrix.terraform }}
         id: cntk-meta
         uses: docker/metadata-action@v4
         with:
@@ -48,14 +116,20 @@ jobs:
             quay.io/cloudnativetoolkit/cli-tools-core
           # Docker tags based on the following events/attributes
           tags: |
-            type=ref,event=tag
-            type=ref,event=branch
-            type=raw,value=latest,enable={{is_default_branch}}
+            type=raw,value=${{ steps.variables.outputs.terraform }}-${{ matrix.base }}
+            type=raw,value=${{ steps.variables.outputs.terraform }},enable=${{ steps.variables.outputs.short-enabled }}
+            type=raw,value=${{ steps.variables.outputs.terraform }}-${{ steps.variables.outputs.release-tag }}-${{ matrix.base }},enable=${{ steps.variables.outputs.release-tag-enabled }}
+            type=raw,value=${{ steps.variables.outputs.terraform }}-${{ steps.variables.outputs.release-tag }},enable=${{ steps.variables.outputs.release-tag-short-enabled }}
+            type=raw,value=${{ matrix.base }},enable=${{ steps.variables.outputs.base-enabled }}
+            type=raw,value=latest,enable=${{ steps.variables.outputs.latest-enabled }}
 
-      - name: Build and push
+      - name: Build and push ${{ matrix.base }}:${{ matrix.terraform }}
         uses: docker/build-push-action@v3
         with:
           context: .
+          file: Dockerfile-${{ matrix.base }}
+          build-args: |
+            TERRAFORM_VERSION=${{ matrix.terraform }}
           push: ${{ github.event_name != 'pull_request' }}
           platforms: linux/amd64,linux/arm64
           tags: ${{ steps.cntk-meta.outputs.tags }}