From 6bf0a5cb5034a7e684dcc3500e841785237ce2dd Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Sun, 7 Apr 2024 19:32:43 +0200 Subject: Adding upstream version 1:115.7.0. Signed-off-by: Daniel Baumann --- taskcluster/scripts/misc/zstdpy | 79 +++++++++++++++++++++++++++++++++++++++++ 1 file changed, 79 insertions(+) create mode 100755 taskcluster/scripts/misc/zstdpy (limited to 'taskcluster/scripts/misc/zstdpy') diff --git a/taskcluster/scripts/misc/zstdpy b/taskcluster/scripts/misc/zstdpy new file mode 100755 index 0000000000..7fc27fded6 --- /dev/null +++ b/taskcluster/scripts/misc/zstdpy @@ -0,0 +1,79 @@ +#!/usr/bin/env python3 +# This Source Code Form is subject to the terms of the Mozilla Public +# License, v. 2.0. If a copy of the MPL was not distributed with this +# file, You can obtain one at http://mozilla.org/MPL/2.0/. + +"""This script compresses and decompresses data using the zstandard compression +format, as provided by the python-zstandard module. + +Data is provided on stdin and output on stdout.""" + +import sys +import zstandard +from argparse import ArgumentParser + + +def main(argv=None): + parser = ArgumentParser(description=__doc__) + parser.set_defaults(mode="compress") + parser.add_argument( + "-z", + "--compress", + dest="mode", + action="store_const", + const="compress", + help="compress the data (this is the default)", + ) + parser.add_argument( + "-d", + "--decompress", + dest="mode", + action="store_const", + const="decompress", + help="decompress the data", + ) + parser.add_argument( + "-T", + "--threads", + dest="threads", + default=1, + type=int, + help="Compress using # working threads. If 0, use number of CPUs on the system. (default 1)", + ) + parser.add_argument( + "-l", + "--level", + dest="level", + default=3, + type=int, + help="Compression level from 1-22 (default 3)", + ) + parser.add_argument( + "file", + nargs="?", + help="File to compress/decompress. Default is stdin.", + ) + + args = parser.parse_args(argv) + + # The zstd commandline tool uses 0 to specify number of threads equal to + # the number of CPUs whereas the python module uses negative numbers to + # flag this behavior. Emulate the zstd commandline utility's behavior here + if args.threads == 0: + args.threads = -1 + + if args.file: + in_file = open(args.file, "rb") + else: + in_file = sys.stdin.buffer + + if args.mode == "compress": + ctx = zstandard.ZstdCompressor(level=args.level, threads=args.threads) + elif args.mode == "decompress": + ctx = zstandard.ZstdDecompressor() + + ctx.copy_stream(in_file, sys.stdout.buffer) + + +if __name__ == "__main__": + main() -- cgit v1.2.3