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#!/usr/bin/env python3
"""Print a per-file and overall coverage summary from undercover's simplecov JSON.
Usage:
python3 scripts/coverage-summary.py [path]
If `path` is omitted, defaults to `.coverage/simplecov.json`.
Exit code is 0 on success, 1 if the JSON is missing or malformed.
"""
import json
import os
import sys
def main(path: str) -> int:
try:
with open(path) as f:
data = json.load(f)
except FileNotFoundError:
print(f"error: {path} not found; run `make coverage` first", file=sys.stderr)
return 1
except json.JSONDecodeError as exc:
print(f"error: {path} is not valid JSON: {exc}", file=sys.stderr)
return 1
try:
suite = data["undercover.el"]["coverage"]
except (KeyError, TypeError):
print(f"error: {path} does not look like an undercover simplecov report",
file=sys.stderr)
return 1
print(f'{"File":<30} {"Lines":>7} {"Covered":>8} {"Coverage":>10}')
print("-" * 60)
total_lines = 0
total_covered = 0
for fname, lines in suite.items():
relevant = [l for l in lines if l is not None]
covered = sum(1 for l in relevant if l > 0)
pct = 100.0 * covered / len(relevant) if relevant else 0.0
total_lines += len(relevant)
total_covered += covered
short = os.path.basename(fname)
print(f"{short:<30} {len(relevant):>7} {covered:>8} {pct:>9.2f}%")
print("-" * 60)
overall = 100.0 * total_covered / total_lines if total_lines else 0.0
print(f'{"TOTAL":<30} {total_lines:>7} {total_covered:>8} {overall:>9.2f}%')
return 0
if __name__ == "__main__":
target = sys.argv[1] if len(sys.argv) > 1 else ".coverage/simplecov.json"
sys.exit(main(target))
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