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#!/usr/bin/python3
# changelog_head - head like tool for .deb changelog entries
# Copyright (C) 2007 Stefano Zacchiroli <zack@debian.org>
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
"""Like "head" for changelog entries, return last n-th entries of the changelog
shipped in a .deb file."""
import sys
from debian import debfile
if __name__ == '__main__':
if len(sys.argv) > 3 or len(sys.argv) < 2:
print("Usage: changelog_head DEB [ENTRIES]")
print(" ENTRIES defaults to 10")
sys.exit(1)
entries = 10
try:
entries = int(sys.argv[2])
except IndexError:
pass
deb = debfile.DebFile(sys.argv[1])
chg = deb.changelog()
entries = chg._blocks[:entries]
print(''.join(map(str, entries)))