build-docker-images.yml

---
name: "Build Docker Images"
on:
  # GHA does not support "shared_inputs" or some other form of workflow_call and workflow_dispatch
  # input consolidation; instead, we must duplicate the input definitions for each event
  # FUTURE: Consolidate the input definitions whenever possible
  workflow_call:
    inputs:
      branch:
        description: "The branch from which images will be built from"
        type: string
        required: false
        default: master
      versionTag:
        description: "Version to be used as tag for built images"
        type: string
        required: true
        default: X.Y.Z
      awsRegion:
        description: "AWS Region to push images to"
        type: string
        required: true
        default: us-east-1
  workflow_dispatch:
    inputs:
      branch:
        description: "The branch from which images will be built from"
        required: false
        default: master
      versionTag:
        description: "Version to be used as tag for built images"
        required: true
        default: X.Y.Z
      awsRegion:
        description: "AWS Region to push images to"
        required: true
        default: us-east-1

permissions:
  id-token: write # This is required for requesting the AWS IAM OIDC JWT
  contents: read # This is required for actions/checkout

env:
  AWS_REGION: ${{ inputs.awsRegion }}

defaults:
  run:
    shell: bash

jobs:
  build-images:
    strategy:
      matrix:
        image:
          [
            {
              name: "bfd-mgmt-eft-sftp-outbound-transfer-lambda",
              dockerfile: "ops/jenkins/bfd-build-eft-sftp-outbound-transfer-lambda/Dockerfile",
              contextDir: "ops/terraform/services/eft/lambda_src/sftp_outbound_transfer",
            },
          ]
    runs-on: ubuntu-latest
    steps:
      - name: Validate Inputs
        run: |
          echo "Validating inputs to ensure they conform to expected formats..."
          echo "${{ inputs.versionTag }}" | grep -P '^\d+\.\d+\.\d+$|^\d+\.\d+\.\d+-[a-zA-Z0-9-]+$'

      - name: Checkout
        uses: actions/checkout@v4
        with:
          fetch-depth: 0
          ref: ${{ inputs.branch }}

      - name: Configure AWS credentials
        uses: aws-actions/configure-aws-credentials@v4
        with:
          role-to-assume: ${{ secrets.GHA_AWS_IAM_ROLE_ARN }}
          role-session-name: build-images
          aws-region: ${{ env.AWS_REGION }}

      - name: Login to ECR
        uses: aws-actions/amazon-ecr-login@v2

      - name: Login to Amazon ECR Public
        id: login-ecr-public
        uses: aws-actions/amazon-ecr-login@v2
        with:
          registry-type: public

      - name: Get ECR Registry Namespace
        run: |
          ECR_REPOSITORY_NAMESPACE="$(aws ecr describe-registry --region "$AWS_REGION" | jq -r '.registryId').dkr.ecr.${AWS_REGION}.amazonaws.com"
          echo "::add-mask::$ECR_REPOSITORY_NAMESPACE"
          echo ECR_REPOSITORY_NAMESPACE=$ECR_REPOSITORY_NAMESPACE >> $GITHUB_ENV

      - name: Set up Docker Buildx
        uses: docker/setup-buildx-action@v3

      - name: Setup tags
        id: setup_tags
        run: |
          # Naively, if version tag does not contain a "-" we assume the version is not a release
          # and the "latest" tag should not be pushed.
          image_tags=""
          if [[ "${{ inputs.versionTag }}" == *"-"* ]]; then
            image_tags="$IMAGE_VERSIONED_TAG"
          else
            image_tags="$IMAGE_VERSIONED_TAG,$IMAGE_LATEST_TAG"
          fi
          echo image_tags=$image_tags >> $GITHUB_OUTPUT
        env:
          IMAGE_VERSIONED_TAG: ${{ env.ECR_REPOSITORY_NAMESPACE }}/${{ matrix.image.name }}:${{ inputs.versionTag }}
          IMAGE_LATEST_TAG: ${{ env.ECR_REPOSITORY_NAMESPACE }}/${{ matrix.image.name }}:latest

      - name: Build and Push
        uses: docker/build-push-action@v5
        with:
          file: ${{ matrix.image.dockerfile }}
          context: ${{ matrix.image.contextDir }}
          push: true
          tags: ${{ steps.setup_tags.outputs.image_tags }}
          # AWS Lambda does not support multi-platform images, something that is enabled by default
          # by this Action via the "provenance" flag. Until AWS Lambda supports this feature
          # properly, we must explicitly disable provenance and specify the amd64 platform.
          # See https://github.com/docker/buildx/issues/1533
          provenance: false
          platforms: "linux/amd64"
        env:
          DOCKER_BUILDKIT: 1