n8n-mcp/.github/workflows/dependency-check.yml

name: Dependency Compatibility Check

# This workflow verifies that when users install n8n-mcp via npm (without lockfile),
# they get compatible dependency versions. This catches issues like #440, #444, #446, #447, #450
# where npm resolution gave users incompatible SDK/Zod versions.

on:
  push:
    branches: [main]
    paths:
      - 'package.json'
      - 'package-lock.json'
      - '.github/workflows/dependency-check.yml'
  pull_request:
    branches: [main]
    paths:
      - 'package.json'
      - 'package-lock.json'
      - '.github/workflows/dependency-check.yml'
  # Allow manual trigger for debugging
  workflow_dispatch:
  # Run weekly to catch upstream dependency changes
  schedule:
    - cron: '0 6 * * 1'  # Every Monday at 6 AM UTC

permissions:
  contents: read

jobs:
  fresh-install-check:
    name: Fresh Install Dependency Check
    runs-on: ubuntu-latest
    timeout-minutes: 10

    steps:
      - name: Checkout code
        uses: actions/checkout@v4

      - name: Setup Node.js
        uses: actions/setup-node@v4
        with:
          node-version: 20

      - name: Build package
        run: |
          npm ci
          npm run build

      - name: Pack package for testing
        run: npm pack

      - name: Create fresh install test directory
        run: |
          mkdir -p /tmp/fresh-install-test
          cp n8n-mcp-*.tgz /tmp/fresh-install-test/

      - name: Install package fresh (simulating user install)
        working-directory: /tmp/fresh-install-test
        run: |
          npm init -y
          # Install from tarball WITHOUT lockfile (simulates npm install n8n-mcp)
          # Use --ignore-scripts to skip native compilation of transitive deps like isolated-vm
          # (n8n-mcp only reads node metadata, it doesn't execute n8n nodes at runtime)
          npm install --ignore-scripts ./n8n-mcp-*.tgz

      - name: Verify critical dependency versions
        working-directory: /tmp/fresh-install-test
        run: |
          echo "=== Dependency Version Check ==="
          echo ""

          # Get actual resolved versions
          SDK_VERSION=$(npm list @modelcontextprotocol/sdk --json 2>/dev/null | jq -r '.dependencies["n8n-mcp"].dependencies["@modelcontextprotocol/sdk"].version // .dependencies["@modelcontextprotocol/sdk"].version // "not found"')
          ZOD_VERSION=$(npm list zod --json 2>/dev/null | jq -r '.dependencies["n8n-mcp"].dependencies.zod.version // .dependencies.zod.version // "not found"')

          echo "MCP SDK version: $SDK_VERSION"
          echo "Zod version: $ZOD_VERSION"
          echo ""

          # Check MCP SDK version - must be exactly 1.20.1
          if [[ "$SDK_VERSION" == "not found" ]]; then
            echo "❌ FAILED: Could not determine MCP SDK version!"
            echo "   The dependency may not have been installed correctly."
            exit 1
          fi
          if [[ "$SDK_VERSION" != "1.20.1" ]]; then
            echo "❌ FAILED: MCP SDK version mismatch!"
            echo "   Expected: 1.20.1"
            echo "   Got: $SDK_VERSION"
            echo ""
            echo "This can cause runtime errors. See issues #440, #444, #446, #447, #450"
            exit 1
          fi
          echo "✅ MCP SDK version is correct: $SDK_VERSION"

          # Check Zod version - must be 3.x (not 4.x, including pre-releases)
          if [[ "$ZOD_VERSION" == "not found" ]]; then
            echo "❌ FAILED: Could not determine Zod version!"
            echo "   The dependency may not have been installed correctly."
            exit 1
          fi
          if [[ "$ZOD_VERSION" =~ ^4\. ]]; then
            echo "❌ FAILED: Zod v4 detected - incompatible with MCP SDK 1.20.1!"
            echo "   Expected: 3.x"
            echo "   Got: $ZOD_VERSION"
            echo ""
            echo "Zod v4 causes '_zod' property errors. See issues #440, #444, #446, #447, #450"
            exit 1
          fi
          echo "✅ Zod version is compatible: $ZOD_VERSION"

          echo ""
          echo "=== All dependency checks passed ==="

      - name: Test basic functionality
        working-directory: /tmp/fresh-install-test
        run: |
          echo "=== Basic Functionality Test ==="

          # Create a simple test script
          cat > test-import.mjs << 'EOF'
          import { spawn } from 'child_process';
          import path from 'path';
          import { fileURLToPath } from 'url';

          const __dirname = path.dirname(fileURLToPath(import.meta.url));

          // Test that the package can be required and basic tools work
          async function test() {
            console.log('Testing n8n-mcp package import...');

            // Start the MCP server briefly to verify it initializes
            const serverPath = path.join(__dirname, 'node_modules/n8n-mcp/dist/mcp/index.js');

            const proc = spawn('node', [serverPath], {
              env: { ...process.env, MCP_MODE: 'stdio' },
              stdio: ['pipe', 'pipe', 'pipe']
            });

            // Send initialize request
            const initRequest = JSON.stringify({
              jsonrpc: '2.0',
              id: 1,
              method: 'initialize',
              params: {
                protocolVersion: '2024-11-05',
                capabilities: {},
                clientInfo: { name: 'test', version: '1.0.0' }
              }
            });

            proc.stdin.write(initRequest + '\n');

            // Wait for response or timeout
            let output = '';
            let stderrOutput = '';
            proc.stdout.on('data', (data) => {
              output += data.toString();
            });

            proc.stderr.on('data', (data) => {
              stderrOutput += data.toString();
              console.error('stderr:', data.toString());
            });

            // Give it 5 seconds to respond
            await new Promise((resolve) => setTimeout(resolve, 5000));

            proc.kill();

            // Check for Zod v4 compatibility errors (the bug we're testing for)
            const allOutput = output + stderrOutput;
            if (allOutput.includes('_zod') || allOutput.includes('Cannot read properties of undefined')) {
              console.error('❌ FAILED: Zod compatibility error detected!');
              console.error('This indicates the SDK/Zod version fix is not working.');
              console.error('See issues #440, #444, #446, #447, #450');
              process.exit(1);
            }

            if (output.includes('"result"')) {
              console.log('✅ MCP server initialized successfully');
              return true;
            } else {
              console.log('Output received:', output.substring(0, 500));
              // Server might not respond in stdio mode without proper framing
              // But if we got here without crashing, that's still good
              console.log('✅ MCP server started without errors');
              return true;
            }
          }

          test()
            .then(() => {
              console.log('=== Basic functionality test passed ===');
              process.exit(0);
            })
            .catch((err) => {
              console.error('❌ Test failed:', err.message);
              process.exit(1);
            });
          EOF

          node test-import.mjs

      - name: Generate dependency report
        if: always()
        working-directory: /tmp/fresh-install-test
        run: |
          echo "=== Full Dependency Tree ===" > dependency-report.txt
          npm list --all >> dependency-report.txt 2>&1 || true

          echo "" >> dependency-report.txt
          echo "=== Critical Dependencies ===" >> dependency-report.txt
          npm list @modelcontextprotocol/sdk zod zod-to-json-schema >> dependency-report.txt 2>&1 || true

          cat dependency-report.txt

      - name: Upload dependency report
        if: always()
        uses: actions/upload-artifact@v4
        with:
          name: dependency-report-${{ github.run_number }}
          path: /tmp/fresh-install-test/dependency-report.txt
          retention-days: 30