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# Copyright (C) 2010-2023 Bastian Kleineidam
#
# 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.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program. If not, see <http://www.gnu.org/licenses/>.
"""Archive commands for the gzip program."""
from . import extract_singlefile_standard, test_singlefile_standard
from .. import util, fileutil, log
import os
import subprocess
test_gzip = test_compress = test_singlefile_standard
def extract_gzip(archive, compression, cmd, verbosity, interactive, outdir):
"""Extract given gzip archive."""
cmdlist = [util.shell_quote(cmd)]
if verbosity > 1:
cmdlist.append('-v')
outfile = get_original_filename(cmd, outdir, archive)
cmdlist.extend(
['-c', '-d', '--', util.shell_quote(archive), '>', util.shell_quote(outfile)]
)
return (cmdlist, {'shell': True})
extract_compress = extract_singlefile_standard
def get_original_filename(cmd, outdir, archive):
"""Get the original filename inside a gzip archive.
This parses the output of gzip --name --list.
"""
outfile = fileutil.get_single_outfile(outdir, archive)
cmdlist = [cmd, "--name", "--list", archive]
try:
output = util.backtick(cmdlist).strip()
lines = output.splitlines()
values = lines[1].split()
baseoutfile = os.path.basename(outfile)
basefilename = os.path.basename(values[-1])
if os.path.normcase(baseoutfile) != os.path.normcase(basefilename):
basearchive = os.path.basename(archive)
# avoid overwriting the original archive with the same name
if os.path.normcase(basefilename) != os.path.normcase(basearchive):
outfile = os.path.join(outdir, basefilename)
except (OSError, subprocess.CalledProcessError) as err:
log.log_error(f"could not run {cmd}: {err}")
return outfile
def create_gzip(archive, compression, cmd, verbosity, interactive, filenames):
"""Create a GZIP archive."""
cmdlist = [util.shell_quote(cmd)]
if verbosity > 1:
cmdlist.append('-v')
cmdlist.extend(['-c', '--'])
cmdlist.extend([util.shell_quote(x) for x in filenames])
cmdlist.extend(['>', util.shell_quote(archive)])
return (cmdlist, {'shell': True})
def list_gzip(archive, compression, cmd, verbosity, interactive):
"""List a GZIP archive."""
cmdlist = [cmd]
if verbosity > 0:
cmdlist.append('-v')
cmdlist.extend(['-l', '--', archive])
return cmdlist
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