# Copyright Broadcom, Inc. All Rights Reserved.
# 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, CRDs and CHANGELOG
    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@a5ac7e51b41094c92402da3b24376905380afc29
        with:
          ref: ${{github.event.pull_request.head.ref}}
          repository: ${{github.event.pull_request.head.repo.full_name}}
          token: ${{ secrets.BITNAMI_BOT_TOKEN }}
          path: charts
      - name: Clone upstream bitnami/charts repository
        uses: actions/checkout@a5ac7e51b41094c92402da3b24376905380afc29
        with:
          path: upstream-charts
      - name: Setup git configuration
        run: |
          cd $GITHUB_WORKSPACE/charts
          git config user.name "Bitnami Containers"
          git config user.email "bitnami-bot@vmware.com"
      # In order to avoid doing a full clone (which would fetch the index branch), we
      # unshallow the clone only using the main branch. We need to get the tags to
      # regenerate the changelog too
      - name: Unshallow main branch and get tags
        run: |
          cd $GITHUB_WORKSPACE/upstream-charts
          git fetch origin main --unshallow
          git fetch --tags
      - name: Install conventional-changelog-cli
        run: npm install -g conventional-changelog-cli
      - id: generate-changelog
        name: Generate changelog
        env:
          CHART: ${{ needs.get-chart.outputs.chart }}
        run: |
          cd $GITHUB_WORKSPACE/upstream-charts
          # The generator needs the file to exist
          chart_version="$(yq e '.version' $GITHUB_WORKSPACE/charts/bitnami/${CHART}/Chart.yaml)"
          changelog_file="$GITHUB_WORKSPACE/charts/bitnami/${CHART}/CHANGELOG.md"
          changelog_tmp="$GITHUB_WORKSPACE/charts/bitnami/${CHART}/CHANGELOG.md.tmp"
          touch "$changelog_file"
          npx conventional-changelog-cli -i ${changelog_file} -s -t ${CHART}/ -r 0 --commit-path bitnami/${CHART}
          # The tool uses short sha to generate commit links. Sometimes, Github does not offer links with the short sha, so we change all commit links to use the full sha instead
          for short_sha in $(grep -Eo "/commit/[a-z0-9]+" ${changelog_file} | awk -F/ '{print $3}'); do
            long_sha="$(git rev-list @ | grep "^$short_sha" | head -n 1)";
            sed -i "s%/commit/$short_sha%/commit/$long_sha%g" ${changelog_file};
          done
          cd $GITHUB_WORKSPACE/charts
          # Remove unreleased section (includes all intermediate commits in the branch) and create future entry based on PR title
          # The unreleased section looks like this "## (YYYY-MM-DD)" whereas a released section looks like this "## 0.0.1 (YYYY-MM-DD)"
          # So we only need to find a released section to start printing in the awk script below
          awk '/^##[^(]*[0-9]/ {flag=1} flag {print}' ${changelog_file} > ${changelog_tmp}
          # Remove extra newlines so the changelog file passes the markdown linter
          sed -i -E -e '/^$/d' ${changelog_tmp} && sed -i -E -e 's/(##.*)/\n\1\n/g' ${changelog_tmp}
          # Include h1 heading and add entry for the current version. There is no tag for the current version (this will be created once merged), so we need to manually add it.
          # We know the final squashed commit title, which will be the PR title. We cannot add a link to the commit in the main branch because it has not been
          # merged yet (this will be corrected once a new version regenerates the changelog). Instead, we add the PR url which contains the exact same information.
          echo -e -n "# Changelog\n\n## $chart_version ($(date +'%Y-%m-%d'))\n\n* ${{ github.event.pull_request.title }} ([#${{ github.event.number }}](${{ github.server_url }}/${{ github.repository }}/pull/${{ github.event.number }}))\n" > ${changelog_file}
          cat ${changelog_tmp} >> ${changelog_file}
          rm ${changelog_tmp}
          if git status -s | grep "bitnami/${CHART}/CHANGELOG.md"; then
            git add "bitnami/${CHART}/CHANGELOG.md" && git commit -m "Update CHANGELOG.md" --signoff
          fi
      - 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
            cd $GITHUB_WORKSPACE/charts
            echo "Validating README.md for bitnami/${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'
          cd $GITHUB_WORKSPACE/charts
          mapfile -t crd_files < <(find "bitnami/${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: |
          cd $GITHUB_WORKSPACE/charts
          # 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@a5ac7e51b41094c92402da3b24376905380afc29
        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}`
            })