/usr/lib/python2.7/dist-packages/pgxnclient/archive.py is in pgxnclient 1.2.1-3.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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pgxnclient -- archives handling
"""
# Copyright (C) 2011-2012 Daniele Varrazzo
# This file is part of the PGXN client
import os
from pgxnclient.i18n import _
from pgxnclient.utils import load_jsons
from pgxnclient.errors import PgxnClientException
def from_spec(spec):
"""Return an `Archive` instance to handle the file requested by *spec*
"""
assert spec.is_file()
return from_file(spec.filename)
def from_file(filename):
"""Return an `Archive` instance to handle the file *filename*
"""
from pgxnclient.zip import ZipArchive
from pgxnclient.tar import TarArchive
for cls in (ZipArchive, TarArchive):
a = cls(filename)
if a.can_open():
return a
raise PgxnClientException(
_("can't open archive '%s': file type not recognized")
% filename)
class Archive(object):
"""Base class to handle archives."""
def __init__(self, filename):
self.filename = filename
def can_open(self):
"""Return `!True` if the `!filename` can be opened by the obect."""
raise NotImplementedError
def open(self):
"""Open the archive for usage.
Raise PgxnClientException if the archive can't be open.
"""
raise NotImplementedError
def close(self):
"""Close the archive after usage."""
raise NotImplementedError
def list_files(self):
"""Return an iterable with the list of file names in the archive."""
raise NotImplementedError
def read(self, fn):
"""Return a file's data from the archive."""
raise NotImplementedError
def unpack(self, destdir):
raise NotImplementedError
def get_meta(self):
filename = self.filename
self.open()
try:
# Return the first file with the expected name
for fn in self.list_files():
if fn.endswith('META.json'):
return load_jsons(self.read(fn).decode('utf8'))
else:
raise PgxnClientException(
_("file 'META.json' not found in archive '%s'") % filename)
finally:
self.close()
def _find_work_directory(self, destdir):
"""
Choose the directory where to work.
Because we are mostly a wrapper for pgxs, let's look for a makefile.
The tar should contain a single base directory, so return the first
dir we found containing a Makefile, alternatively just return the
unpacked dir
"""
for dir in os.listdir(destdir):
for fn in ('Makefile', 'makefile', 'GNUmakefile', 'configure'):
if os.path.exists(os.path.join(destdir, dir, fn)):
return os.path.join(destdir, dir)
return destdir
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