# Copyright VMware, Inc.
# SPDX-License-Identifier: APACHE-2.0

name: '[CI/CD] CI Pipeline'
on: # rebuild any PRs and main branch changes
  pull_request_target:
    types:
      - opened
      - reopened
      - synchronize
      - labeled
    branches:
      - main
      - bitnami:main
# Remove all permissions by default
permissions: {}
# Avoid concurrency over the same PR
concurrency:
  group: ${{ github.workflow }}-${{ github.event.pull_request.number }}
jobs:
  get-chart:
    runs-on: ubuntu-latest
    name: Get modified charts
    permissions:
      pull-requests: read
    outputs:
      chart: ${{ steps.get-chart.outputs.chart }}
      result: ${{ steps.get-chart.outputs.result }}
      values-updated: ${{ steps.get-chart.outputs.values-updated }}
    steps:
      - id: get-chart
        name: Get modified charts
        env:
          PULL_REQUEST_NUMBER: "${{ github.event.pull_request.number }}"
          PULL_REQUEST_URL: "${{ github.event.pull_request.url }}"
          GITHUB_TOKEN: "${{ github.token }}"
        run: |
          # Using the Github API to detect the files changed as git merge-base stops working when the branch is behind
          files_changed_data="$(gh api --paginate /repos/${GITHUB_REPOSITORY}/pulls/${PULL_REQUEST_NUMBER}/files)"
          files_changed="$(echo "$files_changed_data" | jq -r '.[] | .filename')"
          # Adding || true to avoid "Process exited with code 1" errors
          charts_dirs_changed="$(echo "$files_changed" | xargs dirname | grep -o "bitnami/[^/]*" | sort | uniq || true)"
          # Using grep -c as a better alternative to wc -l when dealing with empty strings."
          num_charts_changed="$(echo "$charts_dirs_changed" | grep -c "bitnami" || true)"
          num_version_bumps="$(echo "$files_changed_data" | jq -r '[.[] | select(.filename|endswith("Chart.yaml")) | select(.patch|contains("+version")) ] | length' )"
          non_readme_files=$(echo "$files_changed" | grep -vc "\.md" || true)

          if [[ $(curl -Lks "${PULL_REQUEST_URL}" | jq '.state | index("closed")') != *null* ]]; then
            # The PR for which this workflow run was launched is now closed -> SKIP
            echo "error=The PR for which this workflow run was launched is now closed. The tests will be skipped." >> $GITHUB_OUTPUT
            echo "result=skip" >> $GITHUB_OUTPUT
          elif [[ "$non_readme_files" -le "0" ]]; then
            # The only changes are .md files -> SKIP
            echo "result=skip" >> $GITHUB_OUTPUT
          elif [[ "$num_charts_changed" -ne "$num_version_bumps" ]]; then
            # Changes done in charts but version not bumped -> ERROR
            echo "error=Detected changes in charts without version bump in Chart.yaml. Charts changed: ${num_charts_changed}. Version bumps detected: ${num_version_bumps}" >> $GITHUB_OUTPUT
            echo "result=fail" >> $GITHUB_OUTPUT
          elif [[ "$num_charts_changed" -eq "1" ]]; then
            # Changes done in only one chart -> OK
            echo "result=ok" >> $GITHUB_OUTPUT
            # Extra output: chart name
            chart_name=$(echo "$charts_dirs_changed" | sed "s|bitnami/||g")
            echo "chart=${chart_name}" >> $GITHUB_OUTPUT
            # Extra output: values-updated
            if [[ ${files_changed[@]} =~ "bitnami/${chart_name}/values.yaml" ]]; then
              echo "values-updated=true" >> $GITHUB_OUTPUT
            fi
          elif [[ "$num_charts_changed" -le "0" ]]; then
            # Changes done in the bitnami/ folder but not inside a chart subfolder -> SKIP
            echo "error=No changes detected in charts. The rest of the tests will be skipped." >> $GITHUB_OUTPUT
            echo "result=skip" >> $GITHUB_OUTPUT
          else
            # Changes done in more than chart -> SKIP
            echo "error=Changes detected in more than one chart directory. It is strongly advised to change only one chart in a PR. The rest of the tests will be skipped." >> $GITHUB_OUTPUT
            echo "result=skip" >> $GITHUB_OUTPUT
          fi
      # Using actions/github-scripts because using exit 1 in the script above would not provide any output
      # Source: https://github.community/t/no-output-on-process-completed-with-exit-code-1/123821/3
      - id: show-error
        name: Show error
        if: ${{ steps.get-chart.outputs.result != 'ok' }}
        uses: actions/github-script@60a0d83039c74a4aee543508d2ffcb1c3799cdea
        with:
          script: |
            let message='${{ steps.get-chart.outputs.error }}';
            if ('${{ steps.get-chart.outputs.result }}' === 'fail' ) {
              core.setFailed(message);
            } else {
              core.warning(message);
            }
  update-pr:
    runs-on: ubuntu-latest
    needs: [get-chart]
    name: Automatically update README and CRDs
    permissions:
      contents: write
    outputs:
      result: ${{ steps.update-pr.outputs.result }}
    if: needs.get-chart.outputs.result == 'ok'
    steps:
      - name: Checkout bitnami/charts
        uses: actions/checkout@b4ffde65f46336ab88eb53be808477a3936bae11
        with:
          ref: ${{github.event.pull_request.head.ref}}
          repository: ${{github.event.pull_request.head.repo.full_name}}
          token: ${{ secrets.BITNAMI_BOT_TOKEN }}
      - name: Setup git configuration
        run: |
          git config user.name "Bitnami Containers"
          git config user.email "bitnami-bot@vmware.com"
      - name: Install readme-generator-for-helm
        if: needs.get-chart.outputs.values-updated == 'true'
        run: npm install -g @bitnami/readme-generator-for-helm
      - id: update-readme
        name: 'Update README'
        if: needs.get-chart.outputs.values-updated == 'true'
        env:
          CHART: ${{ needs.get-chart.outputs.chart }}
        run: |
            exit_code=0
            echo "Validating README.md for bitnami/${CHART}"
            # Validating *.registry parameters
            while read line; do
              echo "$line" | grep --quiet "\[default: \(REGISTRY_NAME\|\"\"\)\]" || exit_code=$?
            done < <(grep "@param\s\+[A-Za-z\.]\+\.registry\s\+" "bitnami/${CHART}/values.yaml")
            if [[ $exit_code -ne 0 ]]; then
              echo "error=Please ensure all *.registry params include the [default: REGISTRY_NAME] modifier in the chart bitnami/${CHART}/values.yaml file"
              exit "$exit_code"
            fi
            # Validating *.repository parameters
            while read line; do
              param=$(echo "$line" | awk '{print $3}')
              # Checking if it's a image's registry-related param
              registry_param=$(echo ${param} | sed 's/\.repository/\.registry/g')
              grep --quiet "@param\s\+${registry_param}" "bitnami/${CHART}/values.yaml" && ( echo "$line" | grep --quiet "\[default: \(REPOSITORY_NAME/.*\|\"\"\)\]" || exit_code=$? )
            done < <(grep "@param\s\+[A-Za-z\.]\+\.repository\s\+" "bitnami/${CHART}/values.yaml")
            if [[ $exit_code -ne 0 ]]; then
              echo "error=Please ensure all *.repository params include the [default: REPOSITORY_NAME] modifier the in the chart bitnami/${CHART}/values.yaml file"
              exit "$exit_code"
            fi
            # Validating *.tag parameters
            ! grep --quiet "@param\s\+[A-Za-z\.]\+\.tag\s\+" "bitnami/${CHART}/values.yaml" || exit_code=$?
            if [[ $exit_code -ne 0 ]]; then
              echo "error=Please ensure all *.tag params are skipped (@skip) in the bitnami/${CHART}/values.yaml file"
              exit "$exit_code"
            fi
            echo "Updating README.md for bitnami/${CHART}"
            readme-generator --values "bitnami/${CHART}/values.yaml" --readme "bitnami/${CHART}/README.md" --schema "/tmp/schema.json"
            # Commit all changes, if any
            if git status -s | grep "bitnami/${CHART}"; then
              git add "bitnami/${CHART}" && git commit -m "Update README.md with readme-generator-for-helm" --signoff
            fi
      - id: update-crds
        name: 'Update CRDs'
        # To avoid malicious executions, only PRs performed by the bitnami-bot will perform the CRDs update
        if: github.event.pull_request.user.login == 'bitnami-bot'
        env:
          CHART: ${{ needs.get-chart.outputs.chart }}
        run: |
          # Updating CRDs stored at 'bitnami/$CHART/crds' and 'bitnami/$CHART/templates/crds'
          mapfile -t crd_files < <(find "bitnami/${CHART}/crds" "bitnami/${CHART}/templates/crds" -name "*.yaml" -o -name "*.yml" 2>/dev/null || true)
          for file in "${crd_files[@]}"; do
            # Automatically update CRDs that use the '# Source' header
            source_url_tpl="$(head -n 1 $file | grep -E "^# ?Source: ?" | sed -E 's|^# ?Source: ?||' || true)"
            if [[ -n "$source_url_tpl" ]]; then
              # Validate the second line of the CRD file includes the version of the CRD
              crd_version="$(head -n 2 $file | tail -n 1 | grep -E "^# ?Version: ?" | sed -E 's|^# ?Version: ?||' || true)"
              if [[ -z "$crd_version" ]]; then
                echo "error=CRD file '${file}' does not include the '#Version: <version> header'"
                exit 1
              fi
              # Additional headers may be used for extra features
              # Conditional - Adds a conditional {{if}}/{{end}} to the downloaded upstream CRD
              # VersionOf - Name of a subcomponent, its version will be used for CRD tracking instead of the main component version
              # UseKustomize - If set to true, uses Kustomize to render the CRDs
              # RequiresFilter - If set to true, uses yq to filter resources having 'kind: CustomResourceDefinition', useful when using 'install.yaml' file as upstream source
              continue=true
              line_n=2
              extra_headers=""
              CONDITIONAL=""
              SUBCOMPONENT=""
              USE_KUSTOMIZE=""
              REQUIRES_FILTER=""
              while [ "$continue" = true ]; do
                line_n=$((line_n+1))
                line="$(head -n $line_n $file | tail -n 1)"
                if [[ $line =~ ^#\ ?[a-zA-Z]+:\ ? ]]; then
                  if [[ $line =~ ^#\ ?Conditional:\ ? ]]; then
                    CONDITIONAL="$(echo $line | sed -E 's|^# ?Conditional: ?||')"
                    CONDITIONAL="{{- if ${CONDITIONAL} }}\n"
                  elif [[ $line =~ ^#\ ?VersionOf:\ ? ]]; then
                    SUBCOMPONENT="$(echo $line | sed -E 's|^# ?VersionOf: ?||')"
                  elif [[ $line =~ ^#\ ?UseKustomize:\ ? ]]; then
                    USE_KUSTOMIZE="$(echo $line | sed -E 's|^# ?UseKustomize: ?||' || true)"
                  elif [[ $line =~ ^#\ ?RequiresFilter:\ ? ]]; then
                    REQUIRES_FILTER="$(echo $line | sed -E 's|^# ?RequiresFilter: ?||' || true)"
                  else
                    echo "error=Header ${line} not recognized'"
                    exit 1
                  fi
                  extra_headers="${extra_headers}${line}\n"
                else
                  continue=false
                fi
              done
              # Obtain the version of the subcomponent if provided, otherwise use the main component version
              if [[ -n "$SUBCOMPONENT" ]]; then
                APP_VERSION="$(cat bitnami/${CHART}/Chart.yaml | grep -E "image: \S+${SUBCOMPONENT}:" | sed -E "s|.*${SUBCOMPONENT}:([0-9\.]+)-.*|\1|")"
              else
                APP_VERSION="$(yq e '.appVersion' bitnami/${CHART}/Chart.yaml)"
              fi
              # Replace version placeholder, if present
              source_url=$(echo "$source_url_tpl" | sed "s/{version}/${APP_VERSION}/")
              # If the application version is newer, automatically update the CRD file
              if [[ "$APP_VERSION" != "$crd_version" || "$skip_version" = true ]]; then
                if [[ "$USE_KUSTOMIZE" = "true" ]]; then
                  kubectl kustomize "$source_url" > $file
                else
                  curl -Lks --fail -o $file "$source_url"
                fi
                if [[ "$REQUIRES_FILTER" = "true" ]]; then
                  yq -i e '. | select(.kind == "CustomResourceDefinition") | ... head_comment=""' $file
                fi
                sed -i "1s|^|# Source: ${source_url_tpl}\n# Version: ${APP_VERSION}\n${extra_headers}${CONDITIONAL}|" $file
                if [[ -n "$CONDITIONAL" ]]; then
                  echo -E "{{- end }}" >> $file
                fi
                echo "info=CRD file '${file}' automatically updated using source '$source_url'"
              fi
            else
              echo "info=CRD file '$file' does not contain the '#Source' header. Skipping..."
            fi
          done
          # Commit all changes, if any
          if git status -s | grep "bitnami/${CHART}"; then
            git add "bitnami/${CHART}" && git commit -m "Update CRDs automatically" --signoff
          fi
      - id: update-pr
        name: Push changes
        run: |
          # Push all the new commits, if any
          if [[ $(git cherry -v) ]]; then
            git push
            echo "result=ok" >> $GITHUB_OUTPUT
          else
            echo "result=skip" >> $GITHUB_OUTPUT
          fi
  vib-verify:
    runs-on: ubuntu-latest
    needs: [get-chart, update-pr]
    permissions:
      contents: read
    # Given performance issues of the action feature on GH's side, we need to be very restrictive in the job's triggers:
    # -> The 'Get modified charts' job suceededs AND
    # -> The 'Update PR' job did not push any new changes AND
    #  ( ---> The pipeline was triggered due to a label addition and said label was the 'verify' one OR
    #    ---> the PR already contains the 'verify' label )
    if: |
      needs.get-chart.outputs.result == 'ok' &&
      needs.update-pr.outputs.result == 'skip' &&
      (
        contains(github.event.pull_request.labels.*.name, 'verify') || (github.event.action == 'labeled' && github.event.label.name == 'verify')
      )
    name: VIB Verify
    steps:
      - uses: actions/checkout@b4ffde65f46336ab88eb53be808477a3936bae11
        name: Checkout Repository
        with:
          ref: ${{ github.event.pull_request.head.ref }}
          repository: ${{ github.event.pull_request.head.repo.full_name }}
      - id: log-chart-info
        name: Get chart version and app version
        env:
          CHART: ${{ needs.get-chart.outputs.chart }}
        run: |
          # Log chart info
          chart_version="$(yq e '.version' bitnami/${CHART}/Chart.yaml)"
          app_version="$(yq e '.appVersion' bitnami/${CHART}/Chart.yaml)"
          echo "Chart: ${CHART} ChartVersion: ${chart_version} AppVersion: ${app_version}"
      - id: get-asset-vib-config
        name: Get asset-specific configuration for VIB action
        run: |
          config_file=".vib/${{ needs.get-chart.outputs.chart }}/vib-action.config"

          # Supported configuration customizations and default values
          verification_mode="PARALLEL"

          if [[ -f $config_file ]]; then
            verification_mode="$(cat $config_file | grep 'verification-mode' | cut -d'=' -f2)"
          fi
          runtime_parameters_file=""
          if [[ -f ".vib/${{ needs.get-chart.outputs.chart }}/runtime-parameters.yaml" ]]; then
            # The path is relative to the .vib folder
            runtime_parameters_file="${{ needs.get-chart.outputs.chart }}/runtime-parameters.yaml"
          fi
          echo "verification_mode=${verification_mode}" >> $GITHUB_OUTPUT
          echo "runtime_parameters_file=${runtime_parameters_file}" >> $GITHUB_OUTPUT
      - uses: vmware-labs/vmware-image-builder-action@v0
        name: Verify ${{ needs.get-chart.outputs.chart }}
        with:
          pipeline: ${{ needs.get-chart.outputs.chart }}/vib-verify.json
          verification-mode: ${{ steps.get-asset-vib-config.outputs.verification_mode }}
          runtime-parameters-file: ${{ steps.get-asset-vib-config.outputs.runtime_parameters_file }}
        env:
          CSP_API_URL: https://console.cloud.vmware.com
          CSP_API_TOKEN: ${{ secrets.CSP_API_TOKEN }}
          VIB_PUBLIC_URL: https://cp.bromelia.vmware.com
          # Target-Platform used by default
          VIB_ENV_TARGET_PLATFORM: ${{ secrets.VIB_ENV_TARGET_PLATFORM }}
          # Alternative Target-Platform to be used in case of incompatibilities
          VIB_ENV_ALTERNATIVE_TARGET_PLATFORM: ${{ secrets.VIB_ENV_ALTERNATIVE_TARGET_PLATFORM }}
  auto-pr-review:
    runs-on: ubuntu-latest
    needs: vib-verify
    name: Reviewal for automated PRs
    permissions:
      pull-requests: write
    # Job to be run only when the triage for automated PRs did as well,
    # not taking into account whether 'VIB Verify' succeeded
    if: |
      always() &&
      contains(github.event.pull_request.labels.*.name, 'auto-merge') &&
      github.event.pull_request.user.login == 'bitnami-bot'
    steps:
      # Approve the CI's PR if the 'VIB Verify' job succeeded
      # Approved by the 'github-actions' user; a PR can't be approved by its author
      - name: PR approval
        if: ${{ needs.vib-verify.result == 'success' }}
        uses: actions/github-script@60a0d83039c74a4aee543508d2ffcb1c3799cdea
        with:
          result-encoding: string
          retries: 3
          script: |
            github.rest.pulls.createReview({
              owner: context.repo.owner,
              repo: context.repo.repo,
              pull_number: context.issue.number,
              event: 'APPROVE',
            });
      - name: Merge
        id: merge
        if: ${{ needs.vib-verify.result == 'success' }}
        uses: actions/github-script@60a0d83039c74a4aee543508d2ffcb1c3799cdea
        with:
          result-encoding: string
          retries: 3
          github-token: ${{ secrets.BITNAMI_BOT_TOKEN }}
          script: |
            github.rest.pulls.merge({
              pull_number: context.issue.number,
              owner: context.repo.owner,
              repo: context.repo.repo,
              merge_method: 'squash'
            })
      # If the CI did not succeed ('VIB Verify' failed or skipped),
      # post a comment on the PR and assign a maintainer agent to review it
      - name: Manual review required
        if: ${{ always() && (needs.vib-verify.result != 'success' || steps.merge.outcome != 'success' ) }}
        uses: actions/github-script@60a0d83039c74a4aee543508d2ffcb1c3799cdea
        env:
          BODY: |
            There has been an error during the automated release process. Manual revision is now required.
            Please check the related [action_run#${{ github.run_id }}](${{ github.server_url }}/${{ github.repository }}/actions/runs/${{ github.run_id }}) for more information.
        with:
          retries: 3
          # Necessary to trigger support workflows
          github-token: ${{ secrets.BITNAMI_BOT_TOKEN }}
          script: |
            const {BODY} = process.env
            github.rest.issues.createComment({
              issue_number: context.issue.number,
              owner: context.repo.owner,
              repo: context.repo.repo,
              body: `${BODY}`
            })