cache/.github/workflows/workflow.yml

name: Tests

on:
  pull_request:
    branches:
      - main
      - releases/**
  push:
    branches:
      - main
      - releases/**

permissions:
  contents: read

jobs:
  # Build and unit test
  build:
    strategy:
      matrix:
        os: [ubuntu-latest, windows-latest, macOS-latest]
      fail-fast: false
    runs-on: ${{ matrix.os }}
    steps:
    - name: Checkout
      uses: actions/checkout@v5
    - name: Setup Node.js 24.x
      uses: actions/setup-node@v4
      with:
        node-version: 24.x
        cache: npm
    - run: npm ci
    - name: Prettier Format Check
      run: npm run format-check
    - name: ESLint Check
      run: npm run lint
    - name: Build & Test
      run: npm run test

  # End to end save and restore
  test-save:
    strategy:
      matrix:
        os: [ubuntu-latest, windows-latest, macOS-latest]
      fail-fast: false
    runs-on: ${{ matrix.os }}
    steps:
    - name: Checkout
      uses: actions/checkout@v5
    - name: Generate files in working directory
      shell: bash
      run: __tests__/create-cache-files.sh ${{ runner.os }} test-cache
    - name: Generate files outside working directory
      shell: bash
      run: __tests__/create-cache-files.sh ${{ runner.os }} ~/test-cache
    - name: Save cache
      uses: ./
      with:
        key: test-${{ runner.os }}-${{ github.run_id }}
        path: |
          test-cache
          ~/test-cache

  test-restore:
    needs: test-save
    strategy:
      matrix:
        os: [ubuntu-latest, windows-latest, macOS-latest]
      fail-fast: false
    runs-on: ${{ matrix.os }}
    steps:
    - name: Checkout
      uses: actions/checkout@v5
    - name: Restore cache
      uses: ./
      with:
        key: test-${{ runner.os }}-${{ github.run_id }}
        path: |
          test-cache
          ~/test-cache
    - name: Verify cache files in working directory
      shell: bash
      run: __tests__/verify-cache-files.sh ${{ runner.os }} test-cache
    - name: Verify cache files outside working directory
      shell: bash
      run: __tests__/verify-cache-files.sh ${{ runner.os }} ~/test-cache

  # End to end with proxy
  test-proxy-save:
    runs-on: ubuntu-latest
    container:
      image: ubuntu:latest
      options: --privileged
    services:
      squid-proxy:
        image: wernight/squid
        ports:
          - 3128:3128
    steps:
    - name: Checkout
      uses: actions/checkout@v5
    - name: Install dependencies
      run: |
        apt-get update
        apt-get install -y iptables dnsutils curl jq ipset
    - name: Fetch GitHub meta and configure firewall
      run: |
        # Fetch GitHub meta API to get all IP ranges
        echo "Fetching GitHub meta API..."
        curl -sS https://api.github.com/meta > /tmp/github-meta.json

        # Wait for squid-proxy service to be resolvable and accepting connections
        echo "Waiting for squid-proxy service..."
        for i in 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15; do
          PROXY_IP=$(getent hosts squid-proxy | awk '{ print $1 }')
          if [ -n "$PROXY_IP" ]; then
            echo "squid-proxy resolved to: $PROXY_IP"
            # Test that proxy is actually accepting connections
            if curl --connect-timeout 2 --max-time 5 -x http://squid-proxy:3128 -sS https://api.github.com/zen 2>/dev/null; then
              echo "Proxy is working!"
              break
            else
              echo "Attempt $i: Proxy resolved but not ready yet, waiting..."
            fi
          else
            echo "Attempt $i: squid-proxy not resolvable yet, waiting..."
          fi
          sleep 2
        done

        if [ -z "$PROXY_IP" ]; then
          echo "ERROR: Could not resolve squid-proxy after 15 attempts"
          exit 1
        fi

        # Verify proxy works before locking down firewall
        echo "Final proxy connectivity test..."
        if ! curl --connect-timeout 5 --max-time 10 -x http://squid-proxy:3128 -sS https://api.github.com/zen; then
          echo "ERROR: Proxy is not working properly"
          exit 1
        fi
        echo "Proxy verified working!"

        # Allow established connections
        iptables -A OUTPUT -m state --state ESTABLISHED,RELATED -j ACCEPT

        # Allow loopback
        iptables -A OUTPUT -o lo -j ACCEPT

        # Allow connections to the proxy
        iptables -A OUTPUT -d $PROXY_IP -p tcp --dport 3128 -j ACCEPT

        # Allow DNS
        iptables -A OUTPUT -p udp --dport 53 -j ACCEPT
        iptables -A OUTPUT -p tcp --dport 53 -j ACCEPT

        # Create ipset for GitHub IPs (more efficient than individual rules)
        ipset create github-ips hash:net

        # Add all GitHub IP ranges from meta API (hooks, web, api, git, actions, etc.)
        # EXCLUDING blob storage which must go through proxy
        for category in hooks web api git pages importer actions actions_macos codespaces copilot; do
          echo "Adding IPs for category: $category"
          jq -r ".${category}[]? // empty" /tmp/github-meta.json 2>/dev/null | while read cidr; do
            # Skip IPv6 for now (iptables vs ip6tables) - use case for POSIX compatibility
            case "$cidr" in
              *:*) ;; # IPv6, skip
              *) ipset add github-ips "$cidr" 2>/dev/null || true ;;
            esac
          done
        done

        # Allow all GitHub IPs
        iptables -A OUTPUT -m set --match-set github-ips dst -p tcp --dport 443 -j ACCEPT
        iptables -A OUTPUT -m set --match-set github-ips dst -p tcp --dport 80 -j ACCEPT

        # CRITICAL: Block direct access to blob storage and results-receiver
        # These MUST go through the proxy for cache operations
        echo "Blocking direct access to cache-critical endpoints..."

        # Block results-receiver.actions.githubusercontent.com
        for ip in $(getent ahosts "results-receiver.actions.githubusercontent.com" 2>/dev/null | awk '{print $1}' | sort -u); do
          echo "Blocking direct access to results-receiver: $ip"
          iptables -I OUTPUT 1 -d "$ip" -p tcp --dport 443 -j REJECT
        done

        # Block blob.core.windows.net (Azure blob storage used for cache)
        for host in productionresultssa0.blob.core.windows.net productionresultssa1.blob.core.windows.net productionresultssa2.blob.core.windows.net productionresultssa3.blob.core.windows.net; do
          for ip in $(getent ahosts "$host" 2>/dev/null | awk '{print $1}' | sort -u); do
            echo "Blocking direct access to blob storage ($host): $ip"
            iptables -I OUTPUT 1 -d "$ip" -p tcp --dport 443 -j REJECT
          done
        done

        # Block all other outbound HTTP/HTTPS traffic
        iptables -A OUTPUT -p tcp --dport 80 -j REJECT
        iptables -A OUTPUT -p tcp --dport 443 -j REJECT

        echo "iptables rules applied:"
        iptables -L OUTPUT -n -v
        echo ""
        echo "ipset github-ips contains $(ipset list github-ips | grep -c '^[0-9]') entries"
    - name: Verify proxy enforcement
      run: |
        echo "=== Testing proxy enforcement ==="

        # Test 1: Verify proxy is working by explicitly using it
        echo "Test 1: Connection through proxy (should SUCCEED)"
        if curl --connect-timeout 10 --max-time 15 -x http://squid-proxy:3128 -sS -o /dev/null -w "%{http_code}" https://api.github.com/zen; then
          echo ""
          echo "✓ Proxy connection works"
        else
          echo "✗ ERROR: Proxy is not working!"
          exit 1
        fi

        # Test 2: Direct connection to blob storage should FAIL (blocked by iptables)
        echo ""
        echo "Test 2: Direct connection to blob storage (should FAIL - blocked by iptables)"
        if curl --connect-timeout 5 --max-time 10 --noproxy '*' -sS https://productionresultssa0.blob.core.windows.net 2>/dev/null; then
          echo "✗ ERROR: Direct blob storage connection succeeded but should have been blocked!"
          exit 1
        else
          echo "✓ Direct blob storage correctly blocked by iptables"
        fi

        # Test 3: Connection to blob storage THROUGH proxy should work
        echo ""
        echo "Test 3: Connection through proxy to blob storage (should SUCCEED)"
        HTTP_CODE=$(curl --connect-timeout 10 --max-time 15 -x http://squid-proxy:3128 -sS -o /dev/null -w "%{http_code}" https://productionresultssa0.blob.core.windows.net 2>&1) || true
        echo "HTTP response code: $HTTP_CODE"
        if [ "$HTTP_CODE" = "400" ] || [ "$HTTP_CODE" = "409" ] || [ "$HTTP_CODE" = "200" ]; then
          echo "✓ Proxy successfully forwarded request to blob storage (got HTTP $HTTP_CODE)"
        else
          echo "✗ ERROR: Proxy failed to forward request (got: $HTTP_CODE)"
          exit 1
        fi
        
        echo ""
        echo "=== All proxy enforcement tests passed ==="
        echo "The proxy is working. If cache operations fail, it's because the action doesn't use the proxy."
    - name: Generate files
      run: __tests__/create-cache-files.sh proxy test-cache
    - name: Save cache
      env:
        http_proxy: http://squid-proxy:3128
        https_proxy: http://squid-proxy:3128
      uses: ./
      with:
        key: test-proxy-${{ github.run_id }}
        path: test-cache
    - name: Verify proxy setup
      run: |
        echo "## 🔒 Proxy Integration Test - Cache Save" >> $GITHUB_STEP_SUMMARY
        echo "" >> $GITHUB_STEP_SUMMARY
        echo "### ✅ Test Configuration" >> $GITHUB_STEP_SUMMARY
        echo "" >> $GITHUB_STEP_SUMMARY
        echo "- **Proxy**: squid-proxy:3128" >> $GITHUB_STEP_SUMMARY
        echo "- **Firewall**: iptables blocking direct access to cache endpoints" >> $GITHUB_STEP_SUMMARY
        echo "- **Test**: Cache save operation completed successfully through proxy" >> $GITHUB_STEP_SUMMARY
        echo "" >> $GITHUB_STEP_SUMMARY
        echo "If the cache save step succeeded, it means:" >> $GITHUB_STEP_SUMMARY
        echo "1. Direct access to results-receiver.actions.githubusercontent.com was blocked" >> $GITHUB_STEP_SUMMARY
        echo "2. Direct access to *.blob.core.windows.net was blocked" >> $GITHUB_STEP_SUMMARY  
        echo "3. Cache operations were routed through the squid proxy" >> $GITHUB_STEP_SUMMARY
        echo "" >> $GITHUB_STEP_SUMMARY
        echo "✅ **SUCCESS**: Proxy integration test passed!" >> $GITHUB_STEP_SUMMARY

  test-proxy-restore:
    needs: test-proxy-save
    runs-on: ubuntu-latest
    container:
      image: ubuntu:latest
      options: --privileged
    services:
      squid-proxy:
        image: wernight/squid
        ports:
          - 3128:3128
    steps:
    - name: Checkout
      uses: actions/checkout@v5
    - name: Install dependencies
      run: |
        apt-get update
        apt-get install -y iptables dnsutils curl jq ipset
    - name: Fetch GitHub meta and configure firewall
      run: |
        # Fetch GitHub meta API to get all IP ranges
        echo "Fetching GitHub meta API..."
        curl -sS https://api.github.com/meta > /tmp/github-meta.json

        # Wait for squid-proxy service to be resolvable and accepting connections
        echo "Waiting for squid-proxy service..."
        for i in 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15; do
          PROXY_IP=$(getent hosts squid-proxy | awk '{ print $1 }')
          if [ -n "$PROXY_IP" ]; then
            echo "squid-proxy resolved to: $PROXY_IP"
            # Test that proxy is actually accepting connections
            if curl --connect-timeout 2 --max-time 5 -x http://squid-proxy:3128 -sS https://api.github.com/zen 2>/dev/null; then
              echo "Proxy is working!"
              break
            else
              echo "Attempt $i: Proxy resolved but not ready yet, waiting..."
            fi
          else
            echo "Attempt $i: squid-proxy not resolvable yet, waiting..."
          fi
          sleep 2
        done

        if [ -z "$PROXY_IP" ]; then
          echo "ERROR: Could not resolve squid-proxy after 15 attempts"
          exit 1
        fi

        # Verify proxy works before locking down firewall
        echo "Final proxy connectivity test..."
        if ! curl --connect-timeout 5 --max-time 10 -x http://squid-proxy:3128 -sS https://api.github.com/zen; then
          echo "ERROR: Proxy is not working properly"
          exit 1
        fi
        echo "Proxy verified working!"

        # Allow established connections
        iptables -A OUTPUT -m state --state ESTABLISHED,RELATED -j ACCEPT

        # Allow loopback
        iptables -A OUTPUT -o lo -j ACCEPT

        # Allow connections to the proxy
        iptables -A OUTPUT -d $PROXY_IP -p tcp --dport 3128 -j ACCEPT

        # Allow DNS
        iptables -A OUTPUT -p udp --dport 53 -j ACCEPT
        iptables -A OUTPUT -p tcp --dport 53 -j ACCEPT

        # Create ipset for GitHub IPs (more efficient than individual rules)
        ipset create github-ips hash:net

        # Add all GitHub IP ranges from meta API (hooks, web, api, git, actions, etc.)
        # EXCLUDING blob storage which must go through proxy
        for category in hooks web api git pages importer actions actions_macos codespaces copilot; do
          echo "Adding IPs for category: $category"
          jq -r ".${category}[]? // empty" /tmp/github-meta.json 2>/dev/null | while read cidr; do
            # Skip IPv6 for now (iptables vs ip6tables) - use case for POSIX compatibility
            case "$cidr" in
              *:*) ;; # IPv6, skip
              *) ipset add github-ips "$cidr" 2>/dev/null || true ;;
            esac
          done
        done

        # Allow all GitHub IPs
        iptables -A OUTPUT -m set --match-set github-ips dst -p tcp --dport 443 -j ACCEPT
        iptables -A OUTPUT -m set --match-set github-ips dst -p tcp --dport 80 -j ACCEPT

        # CRITICAL: Block direct access to blob storage and results-receiver
        # These MUST go through the proxy for cache operations
        echo "Blocking direct access to cache-critical endpoints..."

        # Block results-receiver.actions.githubusercontent.com
        for ip in $(getent ahosts "results-receiver.actions.githubusercontent.com" 2>/dev/null | awk '{print $1}' | sort -u); do
          echo "Blocking direct access to results-receiver: $ip"
          iptables -I OUTPUT 1 -d "$ip" -p tcp --dport 443 -j REJECT
        done

        # Block blob.core.windows.net (Azure blob storage used for cache)
        for host in productionresultssa0.blob.core.windows.net productionresultssa1.blob.core.windows.net productionresultssa2.blob.core.windows.net productionresultssa3.blob.core.windows.net; do
          for ip in $(getent ahosts "$host" 2>/dev/null | awk '{print $1}' | sort -u); do
            echo "Blocking direct access to blob storage ($host): $ip"
            iptables -I OUTPUT 1 -d "$ip" -p tcp --dport 443 -j REJECT
          done
        done

        # Block all other outbound HTTP/HTTPS traffic
        iptables -A OUTPUT -p tcp --dport 80 -j REJECT
        iptables -A OUTPUT -p tcp --dport 443 -j REJECT

        echo "iptables rules applied:"
        iptables -L OUTPUT -n -v
        echo ""
        echo "ipset github-ips contains $(ipset list github-ips | grep -c '^[0-9]') entries"
    - name: Verify proxy enforcement
      run: |
        echo "=== Testing proxy enforcement ==="

        # Test 1: Verify proxy is working by explicitly using it
        echo "Test 1: Connection through proxy (should SUCCEED)"
        if curl --connect-timeout 10 --max-time 15 -x http://squid-proxy:3128 -sS -o /dev/null -w "%{http_code}" https://api.github.com/zen; then
          echo ""
          echo "✓ Proxy connection works"
        else
          echo "✗ ERROR: Proxy is not working!"
          exit 1
        fi

        # Test 2: Direct connection to blob storage should FAIL (blocked by iptables)
        echo ""
        echo "Test 2: Direct connection to blob storage (should FAIL - blocked by iptables)"
        if curl --connect-timeout 5 --max-time 10 --noproxy '*' -sS https://productionresultssa0.blob.core.windows.net 2>/dev/null; then
          echo "✗ ERROR: Direct blob storage connection succeeded but should have been blocked!"
          exit 1
        else
          echo "✓ Direct blob storage correctly blocked by iptables"
        fi

        # Test 3: Connection to blob storage THROUGH proxy should work
        echo ""
        echo "Test 3: Connection through proxy to blob storage (should SUCCEED)"
        HTTP_CODE=$(curl --connect-timeout 10 --max-time 15 -x http://squid-proxy:3128 -sS -o /dev/null -w "%{http_code}" https://productionresultssa0.blob.core.windows.net 2>&1) || true
        echo "HTTP response code: $HTTP_CODE"
        if [ "$HTTP_CODE" = "400" ] || [ "$HTTP_CODE" = "409" ] || [ "$HTTP_CODE" = "200" ]; then
          echo "✓ Proxy successfully forwarded request to blob storage (got HTTP $HTTP_CODE)"
        else
          echo "✗ ERROR: Proxy failed to forward request (got: $HTTP_CODE)"
          exit 1
        fi
        
        echo ""
        echo "=== All proxy enforcement tests passed ==="
        echo "The proxy is working. If cache operations fail, it's because the action doesn't use the proxy."
    - name: Restore cache
      env:
        http_proxy: http://squid-proxy:3128
        https_proxy: http://squid-proxy:3128
      uses: ./
      with:
        key: test-proxy-${{ github.run_id }}
        path: test-cache
    - name: Verify proxy setup
      run: |
        echo "## 🔒 Proxy Integration Test - Cache Restore" >> $GITHUB_STEP_SUMMARY
        echo "" >> $GITHUB_STEP_SUMMARY
        echo "### ✅ Test Configuration" >> $GITHUB_STEP_SUMMARY
        echo "" >> $GITHUB_STEP_SUMMARY
        echo "- **Proxy**: squid-proxy:3128" >> $GITHUB_STEP_SUMMARY
        echo "- **Firewall**: iptables blocking direct access to cache endpoints" >> $GITHUB_STEP_SUMMARY
        echo "- **Test**: Cache restore operation completed successfully through proxy" >> $GITHUB_STEP_SUMMARY
        echo "" >> $GITHUB_STEP_SUMMARY
        echo "If the cache restore step succeeded, it means:" >> $GITHUB_STEP_SUMMARY
        echo "1. Direct access to results-receiver.actions.githubusercontent.com was blocked" >> $GITHUB_STEP_SUMMARY
        echo "2. Direct access to *.blob.core.windows.net was blocked" >> $GITHUB_STEP_SUMMARY  
        echo "3. Cache operations were routed through the squid proxy" >> $GITHUB_STEP_SUMMARY
        echo "" >> $GITHUB_STEP_SUMMARY
        echo "✅ **SUCCESS**: Proxy integration test passed!" >> $GITHUB_STEP_SUMMARY
    - name: Verify cache
      run: __tests__/verify-cache-files.sh proxy test-cache