build.yml

name: Docker

on:
  push:
    tags: ["*"]
    branches:
      - "main"
      - "master"
  schedule:
    - cron: '0 5 * * 0'
  pull_request:
    branches: ["**"]

env:
  # Hostname of your registry
  REGISTRY: docker.io
  # Image repository, without hostname and tag
  IMAGE_NAME: alpine/k8s
  SHA: ${{ github.event.pull_request.head.sha || github.event.after }}

jobs:
  get-kubectl-versions:
    runs-on: ubuntu-latest
    outputs:
      versions: ${{ steps.set-versions.outputs.versions }}
    steps:
      - name: Get versions
        id: set-versions
        run: |
          # jq 1.6
          DEBIAN_FRONTEND=noninteractive
          #sudo apt-get update && sudo apt-get -q -y install jq
          curl -sL https://github.com/stedolan/jq/releases/download/jq-1.6/jq-linux64 -o jq
          chmod +x jq

          # Get the list of all releases tags, excludes alpha, beta, rc tags
          releases=$(curl -s https://api.github.com/repos/kubernetes/kubernetes/releases | jq -r '.[].tag_name | select(test("alpha|beta|rc") | not)')
        
          # Loop through the releases and extract the minor version number
          for release in $releases; do
            minor_version=$(echo $release | awk -F'.' '{print $1"."$2}')
            
            # Check if the minor version is already in the array of minor versions
            if [[ ! " ${minor_versions[@]} " =~ " ${minor_version} " ]]; then
              minor_versions+=($minor_version)
            fi
          done
        
          # Sort the unique minor versions in reverse order
          sorted_minor_versions=($(echo "${minor_versions[@]}" | tr ' ' '\n' | sort -rV))
        
          # Loop through the first 4 unique minor versions and get the latest version for each
          for i in $(seq 0 3); do
            minor_version="${sorted_minor_versions[$i]}"
            latest_version=$(echo "$releases" | grep "^$minor_version\." | sort -rV | head -1 | sed 's/v//')
            latest_versions=($latest_version)
          done
          
          echo ${latest_versions[@]}
          # Convert to JSON array for matrix
          TARGETS=$(echo ${latest_versions[@]})
          echo "versions=$(./jq -cn --arg environments "${TARGETS}" '{target: $environments}')" >> $GITHUB_OUTPUT
          echo $GITHUB_OUTPUT
  build:
    runs-on: ubuntu-latest
    needs: get-kubectl-versions
    permissions:
      pull-requests: write
    strategy:
        matrix: ${{ fromJson(needs.get-kubectl-versions.outputs.versions) }}
    steps:
      - name: Setup Docker buildx
        uses: docker/setup-buildx-action@v3

      # Step to fetch the latest curl version
      - name: Get latest curl version
        id: curl-version
        run: |
          # export CURL_OPTIONS="-sL -H \"Authorization: token ${{ secrets.API_KEY }}\""

          curl -H "Cache-Control: no-cache" -sL "https://raw.githubusercontent.com/alpine-docker/multi-arch-docker-images/stable/functions.sh" -o functions.sh
          #curl -H "Cache-Control: no-cache" -sL "https://raw.githubusercontent.com/alpine-docker/multi-arch-docker-images/refs/heads/master/functions.sh" -o functions.sh 
          source functions.sh

          # helm latest, hold the release candidates
          helm=$(curl -s https://api.github.com/repos/helm/helm/releases | jq -r '.[].tag_name | select([startswith("v"), (contains("-rc") | not)] | all)' \
            | sort -rV | head -n 1 |sed 's/v//')
          echo "helm version is $helm"
          echo "HELM_VERSION=$helm" >> $GITHUB_ENV

          # kustomize latest
          kustomize_release=$(curl -s https://api.github.com/repos/kubernetes-sigs/kustomize/releases | jq -r '.[].tag_name | select(contains("kustomize"))' \
            | sort -rV | head -n 1)
          kustomize_version=$(basename ${kustomize_release})
          echo "kustomize version is $kustomize_version"
          echo "KUSTOMIZE_VERSION=$kustomize_version" >> $GITHUB_ENV

          # kubeseal latest
          kubeseal_version=$(curl -s https://api.github.com/repos/bitnami-labs/sealed-secrets/releases | jq -r '.[].tag_name | select(startswith("v"))' \
            | sort -rV | head -n 1 |sed 's/v//')
          echo "kubeseal version is $kubeseal_version"
          echo "KUBESEAL_VERSION=$kubeseal_version" >> $GITHUB_ENV

          # krew latest
          krew_version=$(curl -s https://api.github.com/repos/kubernetes-sigs/krew/releases | jq -r '.[].tag_name | select(startswith("v"))' \
            | sort -rV | head -n 1 |sed 's/v//')
          echo "krew version is $krew_version"
          echo "KREW_VERSION=$krew_version" >> $GITHUB_ENV

          # vals latest
          vals_version=$(curl -s https://api.github.com/repos/helmfile/vals/releases | jq -r '.[].tag_name | select(startswith("v"))' \
            | sort -rV | head -n 1 |sed 's/v//')
          echo "vals version is $vals_version"
          echo "VALS_VERSION=$vals_version" >> $GITHUB_ENV

          # kubeconform latest
          kubeconform_version=$(curl -s https://api.github.com/repos/yannh/kubeconform/releases | jq -r '.[].tag_name | select(startswith("v"))' \
            | sort -rV | head -n 1 |sed 's/v//')
          echo "kubeconform version is $kubeconform_version"
          echo "KUBECONFORM_VERSION=$kubeconform_version" >> $GITHUB_ENV

      # Authenticate to the container registry
      - name: Authenticate to registry ${{ env.REGISTRY }}
        uses: docker/login-action@v3
        with:
          registry: ${{ env.REGISTRY }}
          username: ${{ secrets.DOCKERHUB_USERNAME }}
          password: ${{ secrets.DOCKERHUB_TOKEN }}

      # Extract metadata (tags, labels) for Docker
      - name: Extract Docker metadata
        id: meta
        uses: docker/metadata-action@v5
        with:
          images: ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}
          labels: |
            org.opencontainers.image.revision=${{ env.SHA }}
          tags: |
            type=edge,branch=$repo.default_branch
            type=semver,pattern=v{{version}}
            type=sha,prefix=,suffix=,format=short

      # Build and push Docker image with Buildx
      # (don't push on PR, load instead)
      - name: Build and push Docker image
        id: build-and-push
        uses: docker/build-push-action@v6
        with:
          platforms: linux/amd64,linux/arm64
          sbom: ${{ github.event_name != 'pull_request' }}
          provenance: ${{ github.event_name != 'pull_request' }}
          push: ${{ github.event_name != 'pull_request' }}
          load: ${{ github.event_name == 'pull_request' }}
          tags: ${{ steps.meta.outputs.tags }}
          labels: ${{ steps.meta.outputs.labels }}
          cache-from: type=gha
          cache-to: type=gha,mode=max
          build-args: |
            HELM_VERSION=${{ env.HELM_VERSION }}
            KUBECTL_VERSION=${{ matrix.target }}
            KUSTOMIZE_VERSION=${{ env.KUSTOMIZE_VERSION }}
            KUBESEAL_VERSION=${{ env.KUBESEAL_VERSION }}
            KREW_VERSION=${{ env.KREW_VERSION }}
            VALS_VERSION=${{ env.VALS_VERSION }}
            KUBECONFORM_VERSION=${{ env.KUBECONFORM_VERSION }}

      # - name: Checkout code
      #   uses: actions/checkout@v2

      # - name: check the platform in multi-arch images
      #   run: |
      #     echo ${{ steps.meta.outputs.tags }}
      #     bash ./test.sh ${{ steps.meta.outputs.tags }}

      #- name: set tags
      #  run: |
      #    # install crane
      #    curl -LO https://github.com/google/go-containerregistry/releases/download/v0.20.2/go-containerregistry_Linux_x86_64.tar.gz
      #    tar zxvf go-containerregistry_Linux_x86_64.tar.gz
      #    chmod +x crane

      #    export VERSION=($(docker run -i --rm ${{ steps.meta.outputs.tags }} curl --version|awk '$1=$1' |awk -F "[ -]" 'NR==1{print $2}'))
      #    echo $VERSION
      #    ./crane auth login -u ${{ secrets.DOCKERHUB_USERNAME }} -p ${{ secrets.DOCKERHUB_TOKEN }} index.docker.io
      #    ./crane copy ${{ steps.meta.outputs.tags }} ${{ env.IMAGE_NAME }}:latest
      #    ./crane copy ${{ steps.meta.outputs.tags }} ${{ env.IMAGE_NAME }}:${VERSION}
      #    rm -f /home/runner/.docker/config.json