feat: Added docker-build-action (#8)

* feat: Added docker-build-action

Signed-off-by: Christian Kreuzberger <[email protected]>

* Added metadata as output variable

Signed-off-by: Christian Kreuzberger <[email protected]>

.github/actions/docker-build/action.yaml

@@ -0,0 +1,72 @@
+name: 'Docker Build Push'
+description: 'Docker build and Push'
+inputs:
+  TAGS:
+    description: "List of images/tags to be pushed, e.g., keptncontrib/my-service:1.2.3"
+    required: true
+  BUILD_ARGS:
+    default: ''
+    description: "List of build arguments"
+    required: false
+  REGISTRY_USER:
+    description: "DockerHub User used for pushing to docker.io - leave empty if you don't want to push to docker.io"
+    required: false
+    default: ''
+  REGISTRY_PASSWORD:
+    description: "DockerHub token or password used for pushing to docker.io - leave empty if you don't want to push to docker.io"
+    required: false
+    default: ''
+  GITHUB_TOKEN:
+    description: "Github Access token used for pushing to ghcr.io - leave empty if you don't want to push to ghcr.io"
+    required: false
+    default: ''
+  DOCKERFILE:
+    description: "Dockerfile to be used in docker build"
+    required: true
+    default: 'Dockerfile'
+  TARGET:
+    description: "Target to be built using docker build"
+    required: false
+    default: ''
+outputs:
+  BUILD_METADATA:
+    description: Docker Build metadata 
+    value: ${{ steps.docker_build_image.outputs.metadata }}
+runs:
+  using: "composite"
+  steps: 
+    - name: Set up Docker Buildx
+      uses: docker/setup-buildx-action@v1
+
+    - name: Login to Docker Hub
+      uses: docker/login-action@v1
+      if: ${{ inputs.REGISTRY_USER != '' }}
+      with:
+        username: ${{ inputs.REGISTRY_USER }}
+        password: ${{ inputs.REGISTRY_PASSWORD }}
+
+    - name: Login to GitHub Container Registry
+      if: ${{ inputs.GITHUB_TOKEN != '' }}
+      uses: docker/login-action@v1
+      with:
+        registry: ghcr.io
+        username: ${{ github.actor }}
+        password: ${{ inputs.GITHUB_TOKEN }}
+
+    - name: Load CI Environment from .ci_env
+      id: load_ci_env
+      uses: c-py/action-dotenv-to-setenv@v3
+      with:
+        env-file: .ci_env
+
+    - id: docker_build_image
+      name: "Docker Build"
+      uses: docker/build-push-action@v2
+      with:
+        file: ${{ inputs.DOCKERFILE }}
+        context: .
+        tags: ${{ inputs.TAGS }}
+        build-args: ${{ inputs.BUILD_ARGS }}
+        push: true
+        pull: false
+        target: ${{ inputs.TARGET }}

README.md

@@ -3,9 +3,57 @@
 This repo contains shared GitHub Actions workflows that are used by multiple repos under the Keptn GitHub organization.
 
 ## Workflows
+
+The following re-usable workflows are available:
+
 | Name                    | Filename                      | Description | Inputs | Outputs |
 |-------------------------|-------------------------------|-------------|--------|---------|
 | DCO                     | `dco.yml`                     | Checks the [Developer Certificate of Origin](https://developercertificate.org/) on a PR or on a default branch. |`exclude-emails`: Comma-separated list of emails that should be ignored during DCO checks | None |
 | Validate Semantic PR    | `validate-semantic-pr.yml`    | Checks for [Semantic PR messages](https://www.conventionalcommits.org/en/v1.0.0/) in order to enhance release note generation | `types`: List of types <br/>`scopes`: List of scopes | None |
 | Pre-Release Integration | `pre-release-integration.yml` | Creates a pre-release of a Keptn integration | `PRERELEASE_KEYWORD`: Keyword for pre-releases, e.g., `alpha`, `next` | `RELEASE_TAG` |
 | Release Integration     | `release-integration.yml`     | Creates a release of a Keptn integration | None | `RELEASE_TAG` |
+
+## Actions
+
+The following re-usable actions are available:
+
+| Name                    | Filename                                     | Description                        | Inputs                    | Outputs     |
+|-------------------------|----------------------------------------------|------------------------------------|---------------------------|-------------|
+| Docker Build            | `actions/docker-build/action.yaml`           | Docker Login, Build and Push       | See [Docker Build Action](#docker-build-action) | -           |
+
+
+### Docker Build Action
+
+
+**Inputs**:
+* `TAGS`: List of images/tags to be pushed, e.g., keptncontrib/my-service:1.2.3
+* `BUILD_ARGS`: List of build arguments
+* `REGISTRY_USER`: DockerHub User used for pushing to docker.io - leave empty if you don't want to push to docker.io
+* `REGISTRY_PASSWORD`: DockerHub token or password used for pushing to docker.io - leave empty if you don't want to push to docker.io
+* `GITHUB_TOKEN`: Github Access token used for pushing to ghcr.io - leave empty if you don't want to push to ghcr.io
+* `DOCKERFILE`: Dockerfile to be used in docker build
+* `TARGET`: Target to be built using docker build
+
+**Outputs**:
+* `BUILD_METADATA`: Docker build Metadata, see [Docker Build Push Action Docs](https://github.com/docker/build-push-action#outputs)
+
+
+**Example Usage**:
+```yaml
+      - name: Docker Build
+        id: docker_build
+        uses: keptn/gh-automation/.github/actions/docker-build@v1
+        with:
+          TAGS: |
+            ghcr.io/${{ github.repository_owner }}/${{ env.IMAGE }}:${{ env.VERSION }}
+            ghcr.io/${{ github.repository_owner }}/${{ env.IMAGE }}:${{ env.VERSION }}.${{ env.DATETIME }}
+            ${{ env.DOCKER_ORGANIZATION }}/${{ env.IMAGE_INITCONTAINER }}:${{ env.VERSION }}
+            ${{ env.DOCKER_ORGANIZATION }}/${{ env.IMAGE_INITCONTAINER }}:${{ env.VERSION }}.${{ env.DATETIME }}
+          BUILD_ARGS: |
+            version=${{ env.VERSION }}
+            datetime=${{ env.DATETIME }}
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+          REGISTRY_USER: ${{ secrets.REGISTRY_USER }}
+          REGISTRY_PASSWORD: ${{ secrets.REGISTRY_PASSWORD }}
+          DOCKERFILE: Dockerfile
+```