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Mostly a developer aid for those who want to look at the full backlog of multiple build units. Reviewed-by: Manos Pitsidianakis <manos.pitsidianakis@linaro.org> Signed-off-by: Alex Bennée <alex.bennee@linaro.org> Message-ID: <20250710104531.3099313-3-alex.bennee@linaro.org>
72 lines
2.0 KiB
Python
Executable File
72 lines
2.0 KiB
Python
Executable File
#!/usr/bin/env python3
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#
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# check-units.py: check the number of compilation units and identify
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# those that are rebuilt multiple times
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#
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# Copyright (C) 2025 Linaro Ltd.
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#
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# SPDX-License-Identifier: GPL-2.0-or-later
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from os import access, R_OK, path
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from sys import exit
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import json
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import argparse
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from pathlib import Path
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from collections import Counter
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def extract_build_units(cc_path):
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"""
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Extract the build units and their counds from compile_commands.json file.
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Returns:
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Hash table of ["unit"] = count
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"""
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j = json.load(open(cc_path, 'r'))
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files = [f['file'] for f in j]
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build_units = Counter(files)
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return build_units
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def analyse_units(build_units, top_n):
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"""
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Analyse the build units and report stats and the top 10 rebuilds
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"""
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print(f"Total source files: {len(build_units.keys())}")
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print(f"Total build units: {sum(units.values())}")
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# Create a sorted list by number of rebuilds
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sorted_build_units = sorted(build_units.items(),
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key=lambda item: item[1],
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reverse=True)
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print("Most rebuilt units:")
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for unit, count in sorted_build_units[:top_n]:
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print(f" {unit} built {count} times")
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print("Least rebuilt units:")
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for unit, count in sorted_build_units[-10:]:
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print(f" {unit} built {count} times")
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if __name__ == "__main__":
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parser = argparse.ArgumentParser(
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description="analyse number of build units in compile_commands.json")
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parser.add_argument("cc_path", type=Path, default=None,
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help="Path to compile_commands.json")
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parser.add_argument("-n", type=int, default=20,
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help="Dump the top <n> entries")
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args = parser.parse_args()
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if path.isfile(args.cc_path) and access(args.cc_path, R_OK):
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units = extract_build_units(args.cc_path)
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analyse_units(units, args.n)
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exit(0)
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else:
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print(f"{args.cc_path} doesn't exist or isn't readable")
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exit(1)
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