libcxx/utils/consolidate-benchmarks

#!/usr/bin/env python3

import argparse
import pathlib
import sys

def main(argv):
    parser = argparse.ArgumentParser(
        prog='consolidate-benchmarks',
        description='Consolidate benchmark result files (in LNT format) into a single LNT-format file.')
    parser.add_argument('files_or_directories', type=str, nargs='+',
        help='Path to files or directories containing LNT data to consolidate. Directories are searched '
             'recursively for files with a .lnt extension.')
    parser.add_argument('--output', '-o', type=argparse.FileType('w'), default=sys.stdout,
        help='Where to output the result. Default to stdout.')
    args = parser.parse_args(argv)

    files = []
    for arg in args.files_or_directories:
        path = pathlib.Path(arg)
        if path.is_dir():
            for p in path.rglob('*.lnt'):
                files.append(p)
        else:
            files.append(path)

    for file in files:
        for line in file.open().readlines():
            line = line.strip()
            if not line:
                continue
            args.output.write(line)
            args.output.write('\n')

if __name__ == '__main__':
    main(sys.argv[1:])