Pare down update-test-ubuntu-git.yml

.github/workflows/update-test-ubuntu-git.yml

@@ -1,17 +1,20 @@
-#
-name: Create and publish a Docker image
+name: Publishes the test-ubuntu-git Container Image
 
-# Configures this workflow to run every time a change is pushed to the branch called `release`.
 on:
-  push:
-    branches: ['release']
+  # Use an on demand workflow trigger.  
+  # (Forked copies of actions/checkout won't have permission to update GHCR.io/actions, 
+  #  so avoid trigger events that run automatically.)
+  workflow_dispatch:
+    inputs:
+      pushToContainerRegistry:
+        type: boolean
+        required: true
+        default: false
 
-# Defines two custom environment variables for the workflow. These are used for the Container registry domain, and a name for the Docker image that this workflow builds.
 env:
   REGISTRY: ghcr.io
-  IMAGE_NAME: ${{ github.repository }}
+  IMAGE_NAME: actions/test-ubuntu-git
 
-# There is a single job in this workflow. It's configured to run on the latest available version of Ubuntu.
 jobs:
   build-and-push-image:
     runs-on: ubuntu-latest
@@ -19,30 +22,34 @@ jobs:
     permissions:
       contents: read
       packages: write
-      # 
+ 
     steps:
       - name: Checkout repository
         uses: actions/checkout@v4
-      # Uses the `docker/login-action` action to log in to the Container registry registry using the account and password that will publish the packages. Once published, the packages are scoped to the account defined here.
-      - name: Log in to the Container registry
-        uses: docker/login-action@65b78e6e13532edd9afa3aa52ac7964289d1a9c1
+
+      # Use `docker/login-action` to log in to GHCR.io. 
+      # Once published, the packages are scoped to the account defined here.
+      - name: Log in to the ghcr.io container registry
+        uses: docker/login-action@v3.0.0
         with:
           registry: ${{ env.REGISTRY }}
           username: ${{ github.actor }}
           password: ${{ secrets.GITHUB_TOKEN }}
-      # This step uses [docker/metadata-action](https://github.com/docker/metadata-action#about) to extract tags and labels that will be applied to the specified image. The `id` "meta" allows the output of this step to be referenced in a subsequent step. The `images` value provides the base name for the tags and labels.
-      - name: Extract metadata (tags, labels) for Docker
-        id: meta
-        uses: docker/metadata-action@9ec57ed1fcdbf14dcef7dfbe97b2010124a938b7
-        with:
-          images: ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}
-      # This step uses the `docker/build-push-action` action to build the image, based on your repository's `Dockerfile`. If the build succeeds, it pushes the image to GitHub Packages.
-      # It uses the `context` parameter to define the build's context as the set of files located in the specified path. For more information, see "[Usage](https://github.com/docker/build-push-action#usage)" in the README of the `docker/build-push-action` repository.
-      # It uses the `tags` and `labels` parameters to tag and label the image with the output from the "meta" step.
+
+      # Use `docker/metadata-action` to preserve tags and labels that exist on the GHCR.io container image. 
+      # - name: Extract metadata (tags, labels) for Docker
+      #   id: meta
+      #   uses: docker/metadata-action@v5.5.1
+      #   with:
+      #     images: ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}
+
+      # Use `docker/build-push-action` to build (and optionally publish) the image. 
       - name: Build and push Docker image
-        uses: docker/build-push-action@f2a1d5e99d037542a71f64918e516c093c6f3fc4
+        uses: docker/build-push-action@v5.1.0
         with:
           context: .
-          push: true
-          tags: ${{ steps.meta.outputs.tags }}
-          labels: ${{ steps.meta.outputs.labels }}
+          file: images/test-ubuntu-git.Dockerfile
+          push: ${{ inputs.pushToContainerRegistry }}
+          tags:  ${{ env.IMAGE_NAME }}:sha-${{ env.GITHUB_SHA }}
+          # tags: ${{ steps.meta.outputs.tags }}
+          # labels: ${{ steps.meta.outputs.labels }}