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#!/usr/bin/env python3
import json
import re
import sys
from pathlib import Path
TOLERANCE = 0.1 # percentage points
def line_pct(report_dir: str) -> float:
html = (Path(report_dir) / "index.html").read_text(encoding="utf-8", errors="replace")
# New ya/llvm-cov HTML: "Overall coverage" table, project row, "Lines, %" column.
match = re.search(r"<div>project</div></td><td[^>]*>.*?>([\d.]+)%", html, re.S)
if not match:
# Legacy llvm-cov HTML summary row.
match = re.search(r"Lines:</td>\s*<td[^>]*>([\d.]+)\s*%", html, re.I)
if not match:
raise SystemExit(f"line coverage not found in {report_dir}/index.html")
return float(match.group(1))
if __name__ == "__main__":
if len(sys.argv) < 2:
raise SystemExit("usage: compare_cpp_sdk_coverage.py {extract|check} ...")
cmd = sys.argv[1]
if cmd == "extract":
if len(sys.argv) != 4:
raise SystemExit("usage: compare_cpp_sdk_coverage.py extract <report_dir> <out_json>")
with open(sys.argv[3], "w", encoding="utf-8") as f:
json.dump({"line_pct": line_pct(sys.argv[2])}, f)
elif cmd == "check":
if len(sys.argv) != 4:
raise SystemExit("usage: compare_cpp_sdk_coverage.py check <current_json> <baseline_json>")
with open(sys.argv[2], encoding="utf-8") as f:
current = json.load(f)["line_pct"]
with open(sys.argv[3], encoding="utf-8") as f:
baseline = json.load(f)["line_pct"]
print(
f"CPP SDK line coverage: {current}% (baseline: {baseline}%, tolerance: {TOLERANCE}pp)",
file=sys.stderr,
)
sys.exit(1 if current < baseline - TOLERANCE else 0)
else:
raise SystemExit(f"unknown command: {cmd}")
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