mirror of
https://github.com/Watchful1/PushshiftDumps.git
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62 lines
2.6 KiB
Python
62 lines
2.6 KiB
Python
import argparse
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import zstandard
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import os
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import logging.handlers
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log = logging.getLogger("bot")
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log.setLevel(logging.INFO)
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log_formatter = logging.Formatter('%(asctime)s - %(levelname)s: %(message)s')
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log_str_handler = logging.StreamHandler()
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log_str_handler.setFormatter(log_formatter)
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log.addHandler(log_str_handler)
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if not os.path.exists("logs"):
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os.makedirs("logs")
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log_file_handler = logging.handlers.RotatingFileHandler(os.path.join("logs", "bot.log"), maxBytes=1024*1024*16, backupCount=5)
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log_file_handler.setFormatter(log_formatter)
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log.addHandler(log_file_handler)
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if __name__ == '__main__':
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parser = argparse.ArgumentParser(description="Take all the zst files in the input folder, extract them and compress them again at the ratio specified")
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parser.add_argument("input", help="The input folder to read files from")
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parser.add_argument("output", help="The output folder to write files to")
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parser.add_argument("--level", help="The compression ratio to output at", default="3")
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args = parser.parse_args()
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log.info(f"Reading all files from {args.input}")
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files = []
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total_size = 0
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for file_name in os.listdir(args.input):
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file_path = os.path.join(args.input, file_name)
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if file_name.endswith(".zst") and os.path.isfile(file_path):
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file_size = os.stat(file_path).st_size
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total_size += file_size
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files.append((file_name, file_size))
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if len(files) % 1000 == 0:
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log.info(f"Loaded {len(files)} files")
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log.info(f"Loaded {len(files)} files of total size {total_size:,}")
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level = int(args.level)
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log.info(f"Writing files out to {args.output} at ratio {level}")
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if not os.path.exists(args.output):
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os.makedirs(args.output)
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compressed_bytes_read = 0
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uncompressed_bytes_read = 0
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bytes_written = 0
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files_read = 0
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decompressor = zstandard.ZstdDecompressor(max_window_size=2**31)
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compressor = zstandard.ZstdCompressor(level=level, threads=-1)
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for file_name, file_size in files:
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input_path = os.path.join(args.input, file_name)
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output_path = os.path.join(args.output, file_name)
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with open(input_path, 'rb') as input_handle, open(output_path, "wb") as output_handle:
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compression_reader = decompressor.stream_reader(input_handle)
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read_count, write_count = compressor.copy_stream(compression_reader, output_handle)
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compressed_bytes_read += file_size
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uncompressed_bytes_read += read_count
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bytes_written += write_count
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files_read += 1
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log.info(f"{files_read:,}/{len(files):,} : {(compressed_bytes_read / (2**30)):.2f} gb of {(total_size / (2**30)):.2f} gb compressed to {(bytes_written / (2**30)):.2f} gb : {bytes_written /compressed_bytes_read:.3f}")
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