Add GitHub workflow file to build/tag/push custom docker images

.github/workflows/custom-docker-build-push.yml

@@ -0,0 +1,129 @@
+# Based on the workflow by Brandon Patterson from https://github.com/mikemorran/hubs/blob/master/.github/workflows/ce-build.yml
+# Input masking referenced from https://dev.to/leading-edje/masking-input-parameters-in-github-actions-1ci
+
+# Common registry base URLs:
+# Docker Hub: docker.io
+# GitHub: ghcr.io
+
+name: custom-docker-build-push
+
+on:
+  workflow_dispatch:
+    inputs:
+      Override_Registry_Base_URL:
+        type: string
+      Override_Registry_Username:
+        type: string
+      Override_Registry_Password:
+        type: string
+      Override_Registry_Namespace:
+        type: string
+      Override_Image_Tag:
+        type: string
+      Override_Dockerfile:
+        type: string
+      Override_Code_Path:
+        type: string
+      Use_Build_Cache:
+        type: boolean
+        default: true
+
+# Add in default values for the inputs plus define any missing variables we need.
+# Everything should take their values from env rather than inputs.
+env:
+  Registry_Base_URL: ${{ inputs.Override_Registry_Base_URL || vars.REGISTRY_BASE_URL }}
+# Registry_Username: This must be added in each job that needs it.
+# Registry_Password: This must be added in each job that needs it.
+  Registry_Namespace: ${{ inputs.Override_Registry_Namespace || vars.REGISTRY_NAMESPACE }}
+  Image_Tag: ${{ inputs.Override_Image_Tag || github.ref_name }}
+  Dockerfile: ${{ inputs.Override_Dockerfile || 'RetPageOriginDockerfile' }}
+  Code_Path: ${{ inputs.Override_Code_Path }}
+  Use_Build_Cache: ${{ inputs.Use_Build_Cache }}
+# repo_name: This must be added in each job that needs it.
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Assign username from secret
+        if: ${{ inputs.Override_Registry_Username == ''}}
+        run: |
+          echo "Registry_Username=${{ secrets.REGISTRY_USERNAME }}" >> "$GITHUB_ENV"
+
+      - name: Assign username from input
+        if: ${{ inputs.Override_Registry_Username != ''}}
+        run: |
+          USERNAME=$(jq -r '.inputs.Override_Registry_Username' $GITHUB_EVENT_PATH)
+          echo ::add-mask::$USERNAME
+          echo Registry_Username=$USERNAME >> $GITHUB_ENV
+
+      - name: Assign password from secret
+        if: ${{ inputs.Override_Registry_Password == ''}}
+        run: |
+          echo "Registry_Password=${{ secrets.REGISTRY_PASSWORD }}" >> "$GITHUB_ENV"
+
+      - name: Assign password from input
+        if: ${{ inputs.Override_Registry_Password != ''}}
+        run: |
+          PASSWORD=$(jq -r '.inputs.Override_Registry_Password' $GITHUB_EVENT_PATH)
+          echo ::add-mask::$PASSWORD
+          echo Registry_Password=$PASSWORD >> $GITHUB_ENV
+
+      - name: Add the repository name as an env variable
+        run: |
+          echo "repo_name=${GITHUB_REPOSITORY#*/}" >> "$GITHUB_ENV"
+
+      - name: Checkout code
+        uses: actions/checkout@v2
+
+      - name: Set up Docker Buildx
+        uses: docker/setup-buildx-action@v3
+        with:
+          install: true
+
+      - name: Login to container registry
+        uses: docker/login-action@v3
+        with:
+          registry: ${{ env.Registry_Base_URL }}
+          username: ${{ env.Registry_Username }}
+          password: ${{ env.Registry_Password }}
+
+      - name: Checkout repository
+        uses: actions/checkout@v2
+        with:
+          path: "./repo"
+
+      - name: Use Code_Path for multirepo
+        if: ${{ env.Code_Path != ''}}
+        run: |
+          mkdir ./_repo
+          cp -rf ./repo/${{ env.Code_Path }}/* ./_repo
+          rm -rf ./repo
+          mv ./_repo ./repo
+          ls ./repo
+
+      - name: Docker Buildx setup
+        uses: docker/setup-buildx-action@v3
+        with:
+          install: true
+
+      - name: Docker Build and Push (with cache)
+        if: ${{ fromJSON(env.Use_Build_Cache) == true }}
+        uses: docker/build-push-action@v6
+        with:
+          context: repo/
+          file: repo/${{ env.Dockerfile }}
+          tags: ${{ env.Registry_Base_URL }}/${{ env.Registry_Namespace }}/${{ env.repo_name }}:${{ env.Image_Tag }}-latest,${{ env.Registry_Base_URL }}/${{ env.Registry_Namespace }}/${{ env.repo_name }}:${{ env.Image_Tag }}-${{ github.run_number }}
+          cache-from: type=registry,ref=${{ env.Registry_Base_URL }}/${{ env.Registry_Namespace }}/${{ env.repo_name }}:buildcache
+          cache-to: type=registry,ref=${{ env.Registry_Base_URL }}/${{ env.Registry_Namespace }}/${{ env.repo_name }}:buildcache,mode=max,image-manifest=true,oci-mediatypes=true
+          push: true
+
+      - name: Docker Build and Push (no cache)
+        if: ${{ fromJSON(env.Use_Build_Cache) == false }}
+        uses: docker/build-push-action@v6
+        with:
+          context: repo/
+          file: repo/${{ env.Dockerfile }}
+          tags: ${{ env.Registry_Base_URL }}/${{ env.Registry_Namespace }}/${{ env.repo_name }}:${{ env.Image_Tag }}-latest,${{ env.Registry_Base_URL }}/${{ env.Registry_Namespace }}/${{ env.repo_name }}:${{ env.Image_Tag }}-${{ github.run_number }}
+          push: true