2025-06-05 20:00:29 +00:00
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import os
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LCOV_FILE = "coverage.out"
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OUTPUT_DIR = "coverage"
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os.makedirs(OUTPUT_DIR, exist_ok=True)
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def parse_lcov(content):
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"""Parses LCOV data from a single string."""
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files = {}
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current_file = None
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for line in content.splitlines():
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if line.startswith("SF:"):
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current_file = line[3:].strip()
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files[current_file] = {"coverage": {}, "functions": []}
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elif line.startswith("DA:") and current_file:
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parts = line[3:].split(",")
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line_num = int(parts[0])
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execution_count = int(parts[1])
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files[current_file]["coverage"][line_num] = execution_count
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elif line.startswith("FN:") and current_file:
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parts = line[3:].split(",")
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line_num = int(parts[0])
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function_name = parts[1].strip()
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files[current_file]["functions"].append({"name": function_name, "line": line_num, "hits": 0})
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elif line.startswith("FNDA:") and current_file:
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parts = line[5:].split(",")
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hit_count = int(parts[0])
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function_name = parts[1].strip()
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for func in files[current_file]["functions"]:
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if func["name"] == function_name:
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func["hits"] = hit_count
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break
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return files
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def read_source_file(filepath):
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"""Reads source file content if available."""
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if not os.path.exists(filepath):
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return []
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with open(filepath, "r", encoding="utf-8") as f:
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return f.readlines()
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def generate_file_html(filepath, coverage_data, functions_data):
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"""Generates an HTML file for a specific source file."""
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filename = os.path.basename(filepath)
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source_code = read_source_file(filepath)
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html_path = os.path.join(OUTPUT_DIR, f"{filename}.html")
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total_hits = sum(func["hits"] for func in functions_data)
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max_hits = max((func["hits"] for func in functions_data), default=0)
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total_functions = len(functions_data)
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covered_functions = sum(1 for func in functions_data if func["hits"] > 0)
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function_coverage_percent = (covered_functions / total_functions * 100) if total_functions > 0 else 0
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lines = [
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"<html><head>",
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'<link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/bootstrap/5.3.0/css/bootstrap.min.css">',
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'<script src="https://cdnjs.cloudflare.com/ajax/libs/bootstrap/5.3.0/js/bootstrap.bundle.min.js"></script>',
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"<style>",
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"body { font-family: monospace; text-align: center; }",
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"#funcTable table { margin: 0 auto; width: auto; max-width: 300px; font-size: 14px; border-collapse: collapse; }",
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"#funcTable th, #funcTable td { padding: 2px 6px; text-align: left; white-space: nowrap; }",
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"#funcTable th { background-color: #ddd; }",
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"#funcTable td:nth-child(2) { text-align: right; min-width: 50px; }",
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".zero-hits { background-color: #fcc; font-weight: bold; color: red; }",
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".nonzero-hits { color: green; font-weight: bold; }",
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".low-hits { background-color: #ffe6b3; }",
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".high-hits { background-color: #cfc; }",
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".source-code-table { margin-left: 10px; }"
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"th, td { padding: 0px; font-size: 12px; }",
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"table.table { font-size: 14px; border-collapse: collapse; }",
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"table.table th, table.table td { padding: 1px; font-size: 12px; line-height: 1.2; }",
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"table.table tr { height: auto; }",
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"</style></head><body>",
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f'<h1 class="text-center">{filename} Coverage</h1>',
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f'<h2>Total Execution Hits: {total_hits}</h2>',
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f'<h2>Function Coverage Overview: {function_coverage_percent:.2f}%</h2>',
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'<button class="btn btn-primary mb-2" type="button" data-bs-toggle="collapse" data-bs-target="#funcTable">'
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'Toggle Function Coverage</button>',
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'<div class="collapse show" id="funcTable">',
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'<h2>Function Coverage:</h2><table class="table table-bordered"><thead><tr><th>Function</th><th>Hits</th></tr></thead><tbody>'
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]
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longest_name = max((len(func["name"]) for func in functions_data), default=0)
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for func in functions_data:
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hit_color = "red" if func["hits"] == 0 else "green"
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lines.append(
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f'<tr><td style="padding: 1px; min-width: {longest_name}ch;">{func["name"]}</td>'
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f'<td style="padding: 1px; color: {hit_color}; font-weight: bold;">{func["hits"]}</td></tr>'
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)
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lines.append('</tbody></table></div>') # Close collapsible div
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lines.append('<h2>Source Code:</h2><table class="table table-bordered source-code-table "><thead><tr><th>Line</th><th>Hits</th><th>Code</th></tr></thead><tbody>')
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for i, line in enumerate(source_code, start=1):
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stripped_line = line.strip()
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class_name = "text-muted"
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if not stripped_line or stripped_line.startswith("end") or stripped_line.startswith("--"):
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count_display = "<span class='text-muted'>N/A</span>"
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lines.append(f'<tr><td>{i}</td><td>{count_display}</td><td>{line.strip()}</td>></tr>')
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else:
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count = coverage_data.get(i, 0)
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class_name = "zero-hits" if count == 0 else "low-hits" if count < max_hits * 0.3 else "high-hits"
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count_display = f'{count}'
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marked_text = f'<span class={class_name}>{line.strip()}</span>'
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lines.append(f'<tr><td>{i}</td><td>{count_display}</td><td>{marked_text}</td></tr>')
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lines.append("</tbody></table></body></html>")
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with open(html_path, "w", encoding="utf-8") as f:
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f.write("\n".join(lines))
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def generate_index(files):
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"""Generates an index.html summarizing the coverage."""
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index_html = [
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"<html><head>",
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'<link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/bootstrap/5.3.0/css/bootstrap.min.css">',
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"</head><body>",
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'<h1 class="text-center">Coverage Report</h1>',
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'<table class="table table-striped table-bordered"><thead><tr><th>File</th><th>Total Hits</th><th>Functions</th></tr></thead><tbody>'
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]
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for filepath, data in files.items():
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filename = os.path.basename(filepath)
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total_hits = sum(func["hits"] for func in data["functions"])
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total_functions = len(data["functions"])
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index_html.append(f'<tr><td><a href="{filename}.html">{filename}</a></td><td>{total_hits}</td><td>{total_functions}</td></tr>')
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index_html.append("</tbody></table></body></html>")
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with open(os.path.join(OUTPUT_DIR, "index.html"), "w", encoding="utf-8") as f:
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f.write("\n".join(index_html))
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with open(LCOV_FILE, "r", encoding="utf-8") as f:
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lcov_content = f.read()
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files_data = parse_lcov(lcov_content)
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for file_path, data in files_data.items():
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generate_file_html(file_path, data["coverage"], data["functions"])
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generate_index(files_data)
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print(f"Coverage report generated in {OUTPUT_DIR}/index.html")
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