Created
April 16, 2020 10:58
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Cat log-rotated log files passed as arguments in the right order, unpacking them with zcat, bzcat or xzcat if necessary.
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#!/usr/bin/env python3 | |
""" | |
Cat log-rotated log files passed as arguments in the right order, unpacking | |
them with zcat, bzcat or xzcat if necessary. | |
""" | |
import argparse | |
import os | |
import subprocess | |
import sys | |
ARCHIVE_CATS = { | |
"gz": "zcat", | |
"bz2": "bzcat", | |
"xz": "xzcat", | |
} | |
def get_log_order(filename): | |
lst = filename.split(".") | |
if lst[-1] in ARCHIVE_CATS: | |
del(lst[-1]) | |
try: | |
# Return a negative value, so that foo.log.2 is sorted *before* | |
# foo.log.1 | |
return -int(lst[-1]) | |
except ValueError: | |
# Not a number, assume this is foo.log | |
return 0 | |
def cat(filename): | |
ext = os.path.splitext(filename)[1] | |
cat_cmd = ARCHIVE_CATS.get(ext[1:], "cat") | |
subprocess.run([cat_cmd, filename]) | |
def main(): | |
parser = argparse.ArgumentParser() | |
parser.description = __doc__ | |
parser.add_argument("files", nargs="+") | |
args = parser.parse_args() | |
files = sorted(args.files, key=get_log_order) | |
for file in files: | |
cat(file) | |
return 0 | |
if __name__ == "__main__": | |
sys.exit(main()) | |
# vi: ts=4 sw=4 et |
Probably less, but this one could be less lines if it were not pep8 compliant and did not have a proper argument parser... (yes, this thing supports -h
and --help
). I usually give up on shell scripts when it's time to do arithmetic, but give it a try, I am curious to see what you come up with :)
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Thanks for sharing.
I am curious how many lines it would be as a shell script?
Any volunteer for a language contest? :-)