#!/usr/bin/env python
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#
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# Copyright 2016 Google Inc.
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#
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# Use of this source code is governed by a BSD-style license that can be
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# found in the LICENSE file.
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"""Utilities for zipping and unzipping files."""
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import fnmatch
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import ntpath
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import os
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import posixpath
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import zipfile
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def filtered(names, blacklist):
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"""Filter the list of file or directory names."""
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rv = names[:]
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for pattern in blacklist:
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rv = [n for n in rv if not fnmatch.fnmatch(n, pattern)]
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return rv
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def zip(target_dir, zip_file, blacklist=None): # pylint: disable=W0622
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"""Zip the given directory, write to the given zip file."""
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if not os.path.isdir(target_dir):
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raise IOError('%s does not exist!' % target_dir)
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blacklist = blacklist or []
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with zipfile.ZipFile(zip_file, 'w', zipfile.ZIP_DEFLATED, True) as z:
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for r, d, f in os.walk(target_dir, topdown=True):
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d[:] = filtered(d, blacklist)
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for filename in filtered(f, blacklist):
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filepath = os.path.join(r, filename)
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zi = zipfile.ZipInfo(filepath)
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zi.filename = os.path.relpath(filepath, target_dir)
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if os.name == 'nt':
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# Dumb path separator replacement for Windows.
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zi.filename = zi.filename.replace(ntpath.sep, posixpath.sep)
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try:
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perms = os.stat(filepath).st_mode
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except OSError:
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if os.path.islink(filepath):
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print 'Skipping symlink %s' % filepath
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continue
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else:
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raise
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zi.external_attr = perms << 16L
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zi.compress_type = zipfile.ZIP_DEFLATED
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with open(filepath, 'rb') as f:
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content = f.read()
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z.writestr(zi, content)
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for dirname in d:
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dirpath = os.path.join(r, dirname)
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z.write(dirpath, os.path.relpath(dirpath, target_dir))
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def unzip(zip_file, target_dir):
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"""Unzip the given zip file into the target dir."""
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if not os.path.isdir(target_dir):
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os.makedirs(target_dir)
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with zipfile.ZipFile(zip_file, 'r', zipfile.ZIP_DEFLATED, True) as z:
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for zi in z.infolist():
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dst_subpath = zi.filename
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if os.name == 'nt':
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# Dumb path separator replacement for Windows.
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dst_subpath = dst_subpath.replace(posixpath.sep, ntpath.sep)
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dst_path = os.path.join(target_dir, dst_subpath)
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if dst_path.endswith(os.path.sep):
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os.mkdir(dst_path)
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else:
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with open(dst_path, 'wb') as f:
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f.write(z.read(zi))
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perms = zi.external_attr >> 16L
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os.chmod(dst_path, perms)
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