ci.yaml

---
name: CI

on:
  pull_request:
  push:
    branches:
      - master

jobs:
  build:
    name: "Build & Test"
    if: "!contains(github.event.head_commit.message, '[ci skip]')"
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v7
      - uses: actions/setup-go@v7
        with:
          go-version-file: "go.mod"

      - name: Run unit tests
        run: make test

      - name: Verify README flag tables
        run: make verify-readme

      - name: Verify installation
        run: |
          mkdir -p helmhome
          make install HELM_HOME=helmhome
          helmhome/plugins/helm-diff/bin/diff version

  helm-install:
    name: helm install
    if: "!contains(github.event.head_commit.message, '[ci skip]')"
    needs: [build]
    runs-on: ${{ matrix.os }}
    container: ${{ matrix.container }}
    continue-on-error: ${{ matrix.experimental }}
    strategy:
      fail-fast: false
      matrix:
        os: [ubuntu-latest, macos-latest, windows-latest]
        shell: [default]
        experimental: [false]
        helm-version: [v3.18.6, v3.22.0, v4.3.0]
        include:
          - os: windows-latest
            shell: wsl
            experimental: false
            helm-version: v3.18.6
          - os: windows-latest
            shell: cygwin
            experimental: false
            helm-version: v3.18.6
          - os: ubuntu-latest
            container: alpine
            shell: sh
            experimental: false
            helm-version: v3.18.6
          - os: windows-latest
            shell: wsl
            experimental: false
            helm-version: v3.22.0
          - os: windows-latest
            shell: cygwin
            experimental: false
            helm-version: v3.22.0
          - os: ubuntu-latest
            container: alpine
            shell: sh
            experimental: false
            helm-version: v3.22.0
          - os: windows-latest
            shell: wsl
            experimental: false
            helm-version: v4.3.0
          - os: windows-latest
            shell: cygwin
            experimental: false
            helm-version: v4.3.0
          - os: ubuntu-latest
            container: alpine
            shell: sh
            experimental: false
            helm-version: v4.3.0

    steps:
      - name: Disable autocrlf
        if: "contains(matrix.os, 'windows-latest')"
        run: |-
          git config --global core.autocrlf false
          git config --global core.eol lf

      - uses: actions/checkout@v7

      - name: Setup Helm
        uses: azure/setup-helm@v5
        with:
          version: "${{ matrix.helm-version }}"

      - name: Setup WSL
        if: "contains(matrix.shell, 'wsl')"
        uses: Vampire/setup-wsl@v7

      - name: Setup Cygwin
        if: "contains(matrix.shell, 'cygwin')"
        uses: egor-tensin/setup-cygwin@v4

      - name: helm plugin install
        run: helm plugin install --debug .

  integration-tests:
    name: Integration Tests
    if: "!contains(github.event.head_commit.message, '[ci skip]')"
    needs: [build]
    runs-on: ubuntu-latest
    strategy:
      matrix:
        include:
          # Helm maintains the latest minor version only and therefore each Helmfile version supports 2 Helm minor versions.
          # That's why we cover only 2 Helm minor versions in this matrix.
          # See https://github.com/helmfile/helmfile/pull/286#issuecomment-1250161182 for more context.
          - helm-version: v3.18.6
          - helm-version: v3.22.0
          - helm-version: v4.3.0
    steps:
      - uses: helm/kind-action@v1.15.1
        with:
          cluster_name: kind

      - uses: actions/checkout@v7

      - name: Setup Helm
        uses: azure/setup-helm@v5
        with:
          version: ${{ matrix.helm-version }}

      - name: Helm Version
        run: helm version

      - name: helm plugin install
        run: make install/helm

      - name: helm create helm-diff
        run: helm create helm-diff

      - name: helm diff upgrade --install helm-diff ./helm-diff
        run: helm diff upgrade --install helm-diff ./helm-diff

      - name: helm upgrade -i helm-diff ./helm-diff
        run: helm upgrade -i helm-diff ./helm-diff

      - name: helm diff upgrade -C 3 --set replicaCount=2 --install helm-diff ./helm-diff
        run: helm diff upgrade -C 3 --set replicaCount=2 --install helm-diff ./helm-diff

      # Flux-style setup: the release storage (sh.helm.release.v1.* secrets) lives
      # in a separate storage namespace (flux-system) while the workloads are
      # deployed into the target namespace (prod-apps). Exercises --storage-namespace,
      # HELM_DIFF_STORAGE_NAMESPACE and the three-way-merge pipeline against a
      # real cluster.
      - name: Install release into prod-apps and move its storage to flux-system
        run: |
          helm upgrade -i storage-diff ./helm-diff -n prod-apps --create-namespace
          kubectl create namespace flux-system
          for secret in $(kubectl get secrets -n prod-apps -o name | grep '^secret/sh\.helm\.release\.v1\.storage-diff\.'); do
            kubectl get -n prod-apps "${secret}" -o json \
              | jq --arg ns flux-system '.metadata.namespace = $ns | del(.metadata.resourceVersion, .metadata.uid, .metadata.creationTimestamp)' \
              | kubectl apply -f -
            kubectl delete -n prod-apps "${secret}"
          done

      - name: Verify release storage is only visible in flux-system
        run: |
          if helm get manifest storage-diff -n prod-apps >/dev/null 2>&1; then
            echo "unexpected: release storage still found in prod-apps" >&2
            exit 1
          fi
          helm get manifest storage-diff -n flux-system >/dev/null

      - name: helm diff upgrade fails without --storage-namespace
        run: |
          if helm diff upgrade storage-diff ./helm-diff -n prod-apps >/dev/null 2>&1; then
            echo "unexpected: diff succeeded although the release storage is not in prod-apps" >&2
            exit 1
          fi

      - name: helm diff upgrade --storage-namespace
        run: helm diff upgrade storage-diff ./helm-diff -n prod-apps --storage-namespace flux-system

      - name: helm diff upgrade with HELM_DIFF_STORAGE_NAMESPACE env var
        run: HELM_DIFF_STORAGE_NAMESPACE=flux-system helm diff upgrade storage-diff ./helm-diff -n prod-apps

      - name: helm diff upgrade --storage-namespace --three-way-merge
        run: |
          set -o pipefail
          helm diff upgrade storage-diff ./helm-diff -n prod-apps --storage-namespace flux-system --three-way-merge --set replicaCount=2 | tee /tmp/three-way.out
          grep -q 'replicas: 2' /tmp/three-way.out

      - name: Run issue reproduction tests (scripts/issues)
        run: scripts/issues/run.sh