docker-build.yml

name: Build, Test and Push Docker Image

on:
  workflow_call:
    inputs:
      dockerfile:
        description: 'Path to Dockerfile'
        default: 'Dockerfile'
        type: string
      image-name:
        description: 'Name of Docker Image'
        type: string
        required: true
      image-tag:
        description: 'Tag of Docker Image'
        type: string
        required: true
      security-scan:
        description: 'Enable Security Scan'
        default: true
        type: boolean
      hadolint:
        description: 'Enable Hadolint'
        default: true
        type: boolean
      push:
        description: 'Push Docker Image to Registry'
        default: false
        type: boolean
      context:
        description: 'Path to Docker Build Context'
        default: '.'
        type: string
      registry:
        description: 'Docker Registry'
        default: 'docker.io'
        type: string
    secrets:
      username:
        required: false
      password:
        required: false

jobs:
  build:
    runs-on: ubuntu-latest
    steps:
      - name: Checkout Repository
        uses: actions/checkout@v4

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

      - name: Set up QEMU
        uses: docker/setup-qemu-action@v3

      - name: Login to Docker Hub
        if: ${{ inputs.push }}
        uses: docker/login-action@v3
        with:
          registry: ${{ inputs.registry }}
          username: ${{ secrets.username }}
          password: ${{ secrets.password }}

      - name: Run Hadolint Dockerfile linter
        if: ${{ inputs.hadolint }}
        uses: hadolint/hadolint-action@v3.1.0
        with:
          dockerfile: ${{ inputs.dockerfile }}
          output-file: hadolint.txt
          no-fail: true

      - name: Build Docker Image
        if: ${{ inputs.push }}
        uses: docker/build-push-action@v6
        with:
          context: ${{ inputs.context }}
          file: ${{ inputs.dockerfile }}
          platforms: linux/amd64,linux/arm64
          push: ${{ inputs.push }}
          tags: ${{ inputs.image-name }}:${{ inputs.image-tag }}

      - name: Build Docker Image as Tarball
        if: ${{ inputs.security-scan }}
        run: |
          docker build -t ${{ inputs.image-name }}:${{ inputs.image-tag }} -f ${{ inputs.dockerfile }} ${{ inputs.context }}
          docker save -o vuln-image.tar ${{ inputs.image-name }}:${{ inputs.image-tag }}

      - name: Run Trivy vulnerability scanner
        if: ${{ inputs.security-scan }}
        uses: aquasecurity/trivy-action@0.29.0
        with:
          input: vuln-image.tar
          format: 'table'
          ignore-unfixed: true
          vuln-type: 'os,library'
          severity: 'CRITICAL,HIGH'
          hide-progress: true
          output: trivy.txt

      - name: Update Pull Request with Security Scan Results
        uses: actions/github-script@v7
        if: github.event_name == 'pull_request' && inputs.security-scan
        with:
          script: |
            const fs = require('fs');
            const trivyResults = fs.readFileSync('trivy.txt', 'utf8');
      
            const output = `
            ### 🔒 Trivy Security Scan Results
            <details><summary>Click to expand detailed results</summary>
      
            \`\`\`
            ${trivyResults}
            \`\`\`
            </details>
            `;
      
            await github.rest.issues.createComment({
              issue_number: context.issue.number,
              owner: context.repo.owner,
              repo: context.repo.repo,
              body: output
            });

      - name: Update Pull Request with Hadolint Results
        uses: actions/github-script@v7
        if: github.event_name == 'pull_request' && inputs.hadolint
        with:
          script: |
            const fs = require('fs');
            const hadolintResults = fs.readFileSync('hadolint.txt', 'utf8').trim();
            
            if (hadolintResults.length > 0) {
              const output = `
              ### 🐳 Hadolint Dockerfile Lint Results
              <details><summary>Click to expand</summary>
            
              \`\`\`
              ${hadolintResults}
              \`\`\`
              </details>
              `;

              await github.rest.issues.createComment({
                issue_number: context.issue.number,
                owner: context.repo.owner,
                repo: context.repo.repo,
                body: output
              });
            }