artifacts/.github/workflows/sync-blackbox-exporter.yml

name: Sync blackbox_exporter latest v0.* (matrix)

on:
  workflow_dispatch:
  schedule:
    - cron: "0 2 * * *" # <-- 这是 UTC 02:00。若需 JST 02:00，请改为 "0 17 * * *"

permissions:
  contents: read

concurrency:
  group: sync-blackbox-exporter-v0
  cancel-in-progress: false

jobs:
  prep:
    name: Resolve latest tag & remote check
    runs-on: ubuntu-latest
    env:
      GH_REPO: prometheus/blackbox_exporter
      GH_TOKEN: ${{ github.token }}
      RSYNC_SSH_KEY: ${{ secrets.RSYNC_SSH_KEY }}
      RSYNC_SSH_USER: ${{ secrets.RSYNC_SSH_USER }}
      VPS_HOST: ${{ secrets.VPS_HOST }}
      REMOTE_ROOT: /data/update-server/prometheus/blackbox_exporter
    outputs:
      tag: ${{ steps.latest.outputs.tag }}
      version: ${{ steps.latest.outputs.version }}
      exists: ${{ steps.remotecheck.outputs.exists }}
    steps:
      - uses: actions/checkout@v4

      - name: Ensure GitHub CLI & deps
        run: |
          set -euo pipefail
          sudo apt-get update -y
          sudo apt-get install -y gh jq rsync
          gh --version
          jq --version
          rsync --version | head -n1          

      - name: Resolve latest tag (v0.*)
        id: latest
        run: |
          set -euo pipefail
          gh api -H "Accept: application/vnd.github+json" \
            "/repos/${GH_REPO}/releases?per_page=100" \
          | jq -r '.[].tag_name' \
          | grep -E '^v0(\\.|$)' \
          | sort -V -r \
          | head -n 1 > /tmp/tag.txt

          if [ ! -s /tmp/tag.txt ]; then
            echo "No v0.* tags found." >&2
            exit 1
          fi

          TAG=$(cat /tmp/tag.txt)
          VERSION=${TAG#v}

          echo "tag=$TAG" >> "$GITHUB_OUTPUT"
          echo "version=$VERSION" >> "$GITHUB_OUTPUT"
          echo "Latest tag: $TAG (version: $VERSION)"          

      - name: Init SSH
        run: |
          set -euo pipefail
          mkdir -p ~/.ssh
          echo "$RSYNC_SSH_KEY" > ~/.ssh/id_rsa
          chmod 600 ~/.ssh/id_rsa
          ssh-keyscan -H "$VPS_HOST" >> ~/.ssh/known_hosts          

      - name: Check remote existing version dir
        id: remotecheck
        env:
          VERSION: ${{ steps.latest.outputs.version }}
        run: |
          set -euo pipefail
          REMOTE_DIR="${REMOTE_ROOT}/${VERSION}"
          if ssh -i ~/.ssh/id_rsa "${RSYNC_SSH_USER}@${VPS_HOST}" "test -d '${REMOTE_DIR}'"; then
            echo "exists=true" >> "$GITHUB_OUTPUT"
            echo "Remote already has ${REMOTE_DIR}, skip whole sync."
          else
            echo "exists=false" >> "$GITHUB_OUTPUT"
            echo "Remote does not have ${REMOTE_DIR}, will sync."
          fi          

  sync-one:
    name: Sync ${{ matrix.asset_suffix }} for ${{ needs.prep.outputs.version }}
    needs: prep
    if: needs.prep.outputs.exists == 'false'
    runs-on: ubuntu-latest
    strategy:
      fail-fast: false
      matrix:
        asset_suffix:
          - "linux-amd64.tar.gz"
          - "linux-arm64.tar.gz"
          - "linux-armv7.tar.gz"
          - "linux-armv6.tar.gz"
          - "windows-amd64.zip"
          - "darwin-amd64.tar.gz"
          - "darwin-arm64.tar.gz"
    env:
      GH_REPO: prometheus/blackbox_exporter
      GH_TOKEN: ${{ github.token }}
      RSYNC_SSH_KEY: ${{ secrets.RSYNC_SSH_KEY }}
      RSYNC_SSH_USER: ${{ secrets.RSYNC_SSH_USER }}
      VPS_HOST: ${{ secrets.VPS_HOST }}
      REMOTE_ROOT: /data/update-server/prometheus/blackbox_exporter
      TAG: ${{ needs.prep.outputs.tag }}
      VERSION: ${{ needs.prep.outputs.version }}
    steps:
      - uses: actions/checkout@v4

      - name: Ensure GitHub CLI & deps
        run: |
          set -euo pipefail
          sudo apt-get update -y
          sudo apt-get install -y gh jq rsync
          gh --version          

      - name: Check asset exists via GitHub CLI
        id: has_asset
        run: |
          set -euo pipefail
          ASSET="blackbox_exporter-${VERSION}.${{ matrix.asset_suffix }}"
          echo "Checking asset $ASSET for tag ${TAG}"
          if gh release view "${TAG}" --repo "${GH_REPO}" --json assets \
             | jq -r '.assets[].name' | grep -Fxq "$ASSET"; then
            echo "asset=$ASSET" >> "$GITHUB_OUTPUT"
            echo "exists=true" >> "$GITHUB_OUTPUT"
          else
            echo "exists=false" >> "$GITHUB_OUTPUT"
            echo "Asset $ASSET not found for ${TAG}, will skip."
          fi          

      - name: Download asset
        if: steps.has_asset.outputs.exists == 'true'
        run: |
          set -euo pipefail
          mkdir -p "releases/${VERSION}"
          gh release download "${TAG}" \
            --repo "${GH_REPO}" \
            --pattern "${{ steps.has_asset.outputs.asset }}" \
            --dir "releases/${VERSION}"          

      - name: Init SSH
        if: steps.has_asset.outputs.exists == 'true'
        run: |
          set -euo pipefail
          mkdir -p ~/.ssh
          echo "$RSYNC_SSH_KEY" > ~/.ssh/id_rsa
          chmod 600 ~/.ssh/id_rsa
          ssh-keyscan -H "$VPS_HOST" >> ~/.ssh/known_hosts          

      - name: Rsync this asset to remote
        if: steps.has_asset.outputs.exists == 'true'
        run: |
          set -euo pipefail
          REMOTE_DIR="${REMOTE_ROOT}/${VERSION}"
          ssh -i ~/.ssh/id_rsa "${RSYNC_SSH_USER}@${VPS_HOST}" "mkdir -p '${REMOTE_DIR}'"
          echo "Rsync releases/${VERSION}/${{ steps.has_asset.outputs.asset }} -> ${VPS_HOST}:${REMOTE_DIR}/"
          rsync -av -e "ssh -i ~/.ssh/id_rsa" \
            "releases/${VERSION}/${{ steps.has_asset.outputs.asset }}" "${RSYNC_SSH_USER}@${VPS_HOST}:${REMOTE_DIR}/"          

  retention:
    name: Remote retention (keep latest 10 v0.*)
    needs: [prep, sync-one]
    if: needs.prep.outputs.exists == 'false'
    runs-on: ubuntu-latest
    env:
      RSYNC_SSH_KEY: ${{ secrets.RSYNC_SSH_KEY }}
      RSYNC_SSH_USER: ${{ secrets.RSYNC_SSH_USER }}
      VPS_HOST: ${{ secrets.VPS_HOST }}
      REMOTE_ROOT: /data/update-server/prometheus/blackbox_exporter
    steps:
      - name: Init SSH
        run: |
          set -euo pipefail
          mkdir -p ~/.ssh
          echo "$RSYNC_SSH_KEY" > ~/.ssh/id_rsa
          chmod 600 ~/.ssh/id_rsa
          ssh-keyscan -H "$VPS_HOST" >> ~/.ssh/known_hosts          

      - name: Prune old versions on remote (keep 10)
        run: |
          set -euo pipefail
          ssh -i ~/.ssh/id_rsa "${RSYNC_SSH_USER}@${VPS_HOST}" bash -lc '
            set -euo pipefail
            cd "'"${REMOTE_ROOT}"'" || exit 0
            keep=10
            mapfile -t all < <(ls -1 | grep -E "^[0-9]+\\.[0-9]+\\.[0-9]+$" | sort -V -r || true)
            if [ "${#all[@]}" -le "$keep" ]; then
              echo "Nothing to prune. Count=${#all[@]}"
              exit 0
            fi
            to_delete=("${all[@]:keep}")
            echo "Pruning old versions: ${to_delete[*]}"
            for d in "${to_delete[@]}"; do
              rm -rf -- "$d"
            done
          '