feat(ci): add preview cleanup workflow for closed PRs

.gitea/workflows/preview-cleanup.yml

@@ -0,0 +1,118 @@
+name: Preview Cleanup
+on:
+  pull_request:
+    types:
+    - closed
+    branches:
+    - main
+    - develop
+permissions:
+  contents: read
+  pull-requests: write
+jobs:
+  cleanup-preview:
+    name: Cleanup Preview Environment
+    runs-on: runtime-builder
+    timeout-minutes: 10
+    steps:
+    - name: Extract PR number
+      shell: sh
+      run: |
+        set -eu
+        PR_NUMBER=$(echo "$GITHUB_REF" | sed 's|refs/pull/||; s|/.*||')
+        echo "PR_NUMBER=$PR_NUMBER" >> $GITHUB_ENV
+        echo "PR number: $PR_NUMBER"
+        echo "Preview dir: /var/www/preview/pr-${PR_NUMBER}"
+
+    - name: Install SSH client
+      shell: sh
+      run: |
+        set -eu
+        apt-get update -qq && apt-get install -y -qq openssh-client >/dev/null 2>&1
+        echo "openssh-client installed"
+
+    - name: Remove preview directory from server
+      shell: sh
+      env:
+        STAGING_SSH_HOST: ${{ secrets.STAGING_SSH_HOST }}
+        STAGING_SSH_USER: ${{ secrets.STAGING_SSH_USER }}
+        STAGING_SSH_PORT: ${{ secrets.STAGING_SSH_PORT }}
+        STAGING_SSH_KEY: ${{ secrets.STAGING_SSH_KEY }}
+      run: |
+        set -eux
+        staging_host="${STAGING_SSH_HOST:-47.98.113.167}"
+        staging_user="${STAGING_SSH_USER:-root}"
+        staging_port="${STAGING_SSH_PORT:-22222}"
+        preview_dir="/var/www/preview/pr-${PR_NUMBER}"
+
+        mkdir -p ~/.ssh
+
+        # 查找可用的SSH密钥
+        key_path=""
+        if [ -f /root/.ssh/xiaoxia_runtime_builder ]; then
+          key_path="/root/.ssh/xiaoxia_runtime_builder"
+          echo "Using key: $key_path (builder key)"
+        elif [ -f "$HOME/.ssh/xiaoxia_runtime_builder" ]; then
+          key_path="$HOME/.ssh/xiaoxia_runtime_builder"
+          echo "Using key: $key_path (home key)"
+        elif [ -n "${STAGING_SSH_KEY:-}" ]; then
+          key_path="$HOME/.ssh/id_ed25519"
+          printf '%s\n' "$STAGING_SSH_KEY" > "$key_path"
+          chmod 600 "$key_path"
+          echo "Using key from STAGING_SSH_KEY secret"
+        else
+          echo "ERROR: No SSH key available"
+          ls -la ~/.ssh/ 2>/dev/null || true
+          ls -la /root/.ssh/ 2>/dev/null || true
+          exit 1
+        fi
+
+        ssh-keyscan -p "$staging_port" -H "$staging_host" >> ~/.ssh/known_hosts 2>/dev/null
+        echo "SSH keyscan done"
+
+        # 测试SSH连接
+        ssh -p "$staging_port" -i "$key_path" -o StrictHostKeyChecking=no "${staging_user}@${staging_host}" "echo SSH_CONNECTION_OK && hostname"
+        echo "SSH connection verified"
+
+        # 检查目录是否存在
+        DIR_EXISTS=$(ssh -p "$staging_port" -i "$key_path" -o StrictHostKeyChecking=no "${staging_user}@${staging_host}" \
+          "if [ -d '${preview_dir}' ]; then echo 'yes'; else echo 'no'; fi")
+
+        if [ "$DIR_EXISTS" = "yes" ]; then
+          echo "Removing preview directory: ${preview_dir}"
+          ssh -p "$staging_port" -i "$key_path" -o StrictHostKeyChecking=no "${staging_user}@${staging_host}" \
+            "rm -rf ${preview_dir} && echo 'Preview directory removed successfully'"
+          echo "Cleanup completed: ${preview_dir}"
+        else
+          echo "Preview directory does not exist: ${preview_dir}, nothing to clean up"
+        fi
+
+    - name: Comment cleanup notice on PR
+      if: success()
+      shell: sh
+      env:
+        GITHUB_TOKEN: ${{ github.token }}
+      run: |
+        set -eu
+        PR_NUMBER=$(echo "$GITHUB_REF" | sed 's|refs/pull/||; s|/.*||')
+
+        COMMENT_BODY=$(python3 -c "
+        import json, os
+        pr_num = os.environ['PR_NUMBER']
+        body = f'''🗑️ **预览环境已清理**
+
+PR #{pr_num} 已关闭或合并，对应的预览环境已被清理。
+
+> 如有需要，可以重新打开 PR 来重新生成预览环境。
+'''
+        print(json.dumps({'body': body}))
+        ")
+
+        API_URL="${GITHUB_API_URL}/repos/${GITHUB_REPOSITORY}/issues/${PR_NUMBER}/comments"
+        curl -s -X POST \
+          -H "Authorization: token ${GITHUB_TOKEN}" \
+          -H "Content-Type: application/json" \
+          -d "$COMMENT_BODY" \
+          "$API_URL" \
+          > /dev/null
+        echo "Cleanup comment posted"