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77 lines
2.6 KiB
Python
77 lines
2.6 KiB
Python
#!/usr/bin/env python3
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"""
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Skill: performance-profiling
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Script: lighthouse_audit.py
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Purpose: Run Lighthouse performance audit on a URL
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Usage: python lighthouse_audit.py https://example.com
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Output: JSON with performance scores
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Note: Requires lighthouse CLI (npm install -g lighthouse)
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"""
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import subprocess
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import json
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import sys
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import os
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import tempfile
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def run_lighthouse(url: str) -> dict:
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"""Run Lighthouse audit on URL."""
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try:
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with tempfile.NamedTemporaryFile(suffix='.json', delete=False) as f:
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output_path = f.name
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result = subprocess.run(
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[
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"lighthouse",
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url,
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"--output=json",
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f"--output-path={output_path}",
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"--chrome-flags=--headless",
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"--only-categories=performance,accessibility,best-practices,seo"
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],
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capture_output=True,
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text=True,
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timeout=120
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)
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if os.path.exists(output_path):
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with open(output_path, 'r') as f:
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report = json.load(f)
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os.unlink(output_path)
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categories = report.get("categories", {})
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return {
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"url": url,
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"scores": {
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"performance": int(categories.get("performance", {}).get("score", 0) * 100),
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"accessibility": int(categories.get("accessibility", {}).get("score", 0) * 100),
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"best_practices": int(categories.get("best-practices", {}).get("score", 0) * 100),
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"seo": int(categories.get("seo", {}).get("score", 0) * 100)
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},
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"summary": get_summary(categories)
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}
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else:
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return {"error": "Lighthouse failed to generate report", "stderr": result.stderr[:500]}
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except subprocess.TimeoutExpired:
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return {"error": "Lighthouse audit timed out"}
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except FileNotFoundError:
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return {"error": "Lighthouse CLI not found. Install with: npm install -g lighthouse"}
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def get_summary(categories: dict) -> str:
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"""Generate summary based on scores."""
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perf = categories.get("performance", {}).get("score", 0) * 100
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if perf >= 90:
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return "[OK] Excellent performance"
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elif perf >= 50:
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return "[!] Needs improvement"
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else:
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return "[X] Poor performance"
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if __name__ == "__main__":
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if len(sys.argv) < 2:
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print(json.dumps({"error": "Usage: python lighthouse_audit.py <url>"}))
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sys.exit(1)
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result = run_lighthouse(sys.argv[1])
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print(json.dumps(result, indent=2))
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