issue #63: build and push docker container to github registry (#66)

* issue #63: build and push docker container to github registry

* issue #63: fixed context for build-and-push-on-pr-merge

* issue #63: added EOF

* issue #63: Removed build-and-push-on-commit, not necessary for now

* issue #63: fixe workflow

* issue #63: created script for the second job

* issue #63: check if a dockerfile is present inside the repo

* issue #63: cancel the action if no dockerfile is found

* issue #63: added logging message

* issue #63: manage multiple branch

* issue #63: updated the doc and download the script

* issue #63: fixed issues and added the doc to the readme

* issue #63: removed on push_branches for this repository

* issue #63: changed the url for the good one (testing)

* issue #63: support merged branch and added .vscode

* issue #63: fix duplicated step name

* installing the script with python -m pip install instead of downloading the whole repo

.github/workflows/workflow-build-push-container-github-registry.md

@@ -0,0 +1,14 @@
+# Reusable workflow to build and push docker container to GitHub Container Registry (GCR)
+
+- **Purpose:** Build and push a docker container to GitHub Container Registry (GCR).
+- **Usage:** Call this workflow and provide the container-name, tag, and
+registry as inputs. The registry should always start with
+ghcr.io/<YOUR-REGISTRY-NAME> (e.g., ghcr.io/ai-cfia). If you create, push, or
+merge a pull request, the workflow will be triggered and will start 2 jobs.
+The first job will build and push the new image with 2 tags. The first tag is
+the pull request number, and the second tag is the commit that triggered the
+action. The second job will remove the previous image based on the previous
+tag. If no Dockerfile is found
+at the root of the repository, the workflow will be cancelled.
+- **Required Secrets:**
+  - None

.github/workflows/workflow-build-push-container-github-registry.yml

@@ -0,0 +1,144 @@
+name: Reusable workflow to build and push docker container to github container registry
+
+on:
+  workflow_call:
+    inputs:
+      container-name:
+        required: true
+        type: string
+      tag:
+        required: true
+        type: string
+      registry:
+        required: true
+        type: string
+
+jobs:
+  build-push-image:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Check Out Repo
+        uses: actions/checkout@v4
+
+      - name: Check if a Dockerfile is present at the root of the repo
+        id: check-file
+        run: |
+          if [ -f Dockerfile ]; then
+            echo "::set-output name=exists::true"
+          else
+            echo "::set-output name=exists::false"
+          fi
+
+      - name: Early exit if no Dockerfile is present
+        if: steps.check-file.outputs.exists == 'false'
+        run: |
+          gh run cancel ${{ github.run_id }}
+          gh run watch ${{ github.run_id }}
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+
+      - name: Set up Docker Buildx
+        id: buildx
+        uses: docker/setup-buildx-action@v3
+
+      - name: Log in to the github container registry (GCR)
+        uses: docker/login-action@65b78e6e13532edd9afa3aa52ac7964289d1a9c1
+        with:
+          registry: ${{ inputs.registry }}
+          username: ${{ github.actor }}
+          password: ${{ secrets.GITHUB_TOKEN }}
+
+      - name: Cache Docker layers
+        uses: actions/cache@v3
+        with:
+          path: /tmp/.buildx-cache
+          key: ${{ runner.os }}-buildx-${{ github.sha }}
+          restore-keys: ${{ runner.os }}-buildx
+
+      - name: Extract branch name
+        shell: bash
+        run: echo "branch=${GITHUB_HEAD_REF:-${GITHUB_REF#refs/heads/}}" >> $GITHUB_OUTPUT
+        id: extract_branch_name
+
+      - name: Build and push (3 tags | commit number, pr number and branch name) (unmerged)
+        id: docker_build_and_tag_unmerged
+        if: github.event.pull_request.merged == false
+        uses: docker/build-push-action@v5
+        with:
+          context: .
+          push: true
+          tags: |
+            ${{ inputs.registry }}/${{ inputs.container-name }}:${{ github.event.number }}
+            ${{ inputs.registry }}/${{ inputs.container-name }}:${{ inputs.tag }}
+            ${{ inputs.registry }}/${{ inputs.container-name }}:${{ steps.extract_branch_name.outputs.branch }}
+          cache-from: type=local,src=/tmp/.buildx-cache
+          cache-to: type=local,mode=max,dest=/tmp/.buildx-cache-new
+
+      - name: Build and push (2 tags | commit number and branch name) (merged)
+        id: docker_build_and_tag_merged
+        if: github.event.pull_request.merged == true
+        uses: docker/build-push-action@v5
+        with:
+          context: .
+          push: true
+          tags: |
+            ${{ inputs.registry }}/${{ inputs.container-name }}:${{ inputs.tag }}
+            ${{ inputs.registry }}/${{ inputs.container-name }}:${{ github.event.pull_request.base.ref }}
+          cache-from: type=local,src=/tmp/.buildx-cache
+          cache-to: type=local,mode=max,dest=/tmp/.buildx-cache-new
+
+      - name: Refresh Cache
+        run: |
+          rm -rf /tmp/.buildx-cache
+          mv /tmp/.buildx-cache-new /tmp/.buildx-cache
+
+      - name: Image digest (latest)
+        if: github.event.pull_request.merged == false
+        run: echo ${{ steps.docker_build_and_tag_unmerged.outputs.digest }}
+
+      - name: Image digest (latest)
+        if: github.event.pull_request.merged == true
+        run: echo ${{ steps.docker_build_and_tag_merged.outputs.digest }}
+
+  remove-old-image:
+    runs-on: ubuntu-latest
+    needs: build-push-image
+    steps:
+      - name: Set up Python
+        uses: actions/setup-python@v3
+        with:
+          python-version: 3.8
+
+      - name: Install the remove-previous-image from github.com/ai-cfia/devops inside the user-site
+        run: python -m pip install --user git+https://$USER:$USER_TOKEN@github.com/ai-cfia/devops.git@26-as-a-devops-i-want-to-create-unit-tests-for-the-remove-previous-imagepy-script
+        env:
+          USER: ${{ secrets.USER }}
+          USER_TOKEN: ${{ secrets.USER_TOKEN }}
+
+      - name: Access user site-packages
+        run: |
+          USER_SITE=$(python -m site --user-site)
+          echo "Path to site-packages is $USER_SITE"
+          echo "USER_SITE=$USER_SITE" >> $GITHUB_ENV
+
+      - name: Delete the previous image (unmerged pull request)
+        if: github.event.pull_request.merged == false
+        run: python $USER_SITE/remove-previous-image/remove_previous_image.py
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+          REGISTRY: ${{ inputs.registry }}
+          CONTAINER_NAME: ${{ inputs.container-name }}
+          UNIQUE_TAG: ${{ github.event.number }}
+          USER: ${{ github.actor }}
+          CURRENT_COMMIT: ${{ inputs.tag }}
+
+      - name: Delete the previous image (merged pull request)
+        if: github.event.pull_request.merged == true
+        run: python $USER_SITE/remove-previous-image/remove_previous_image.py
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+          REGISTRY: ${{ inputs.registry }}
+          CONTAINER_NAME: ${{ inputs.container-name }}
+          UNIQUE_TAG: ${{ github.event.pull_request.base.ref }}
+          USER: ${{ github.actor }}
+          CURRENT_COMMIT: ${{ inputs.tag }}

.vscode/extensions.json

@@ -0,0 +1,9 @@
+{
+	"recommendations": [
+		"stkb.rewrap",
+		"DavidAnson.vscode-markdownlint"
+	],
+	"unwantedRecommendations": [
+
+	]
+}

.vscode/settings.json

@@ -0,0 +1,6 @@
+{
+    "editor.rulers": [80],
+    "files.trimTrailingWhitespace": true,
+    "files.trimFinalNewlines": true,
+    "files.insertFinalNewline": true
+}

README.md

@@ -33,6 +33,8 @@ Here are the available workflows and their associated documentation:
   Pages](.github/workflows/workflow-gh-pages-deployment.md)
 - [Reusable Vercel
   Deployment](.github/workflows/workflow-vercel-deployment.md)
+- [Reusable Build 
+  and Push to GCR](.github/workflows/workflow-build-push-container-github-registry.md)
 
 ## Usage