forked from timdoug/unpkg
-
Notifications
You must be signed in to change notification settings - Fork 0
/
unpkg.py
207 lines (179 loc) · 6.35 KB
/
unpkg.py
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
#!/usr/bin/python3
# unpkg
# http://www.timdoug.com/unpkg/
# by timdoug[.com|@gmail.com]
#
# version notes:
#
# 4.8 -- 2022-03-20
# - Port to Python3 for macOS 12.3+
# https://developer.apple.com/documentation/macos-release-notes/macos-12_3-release-notes#Python
#
# 4.7 -- 2021-03-14
# - Native Apple Silicon support: rebuild w/ arm64 and x86_64 binaries
#
# 4.6 -- 2019-10-22
# - Rebuild with 64-bit Platypus to run on macOS 10.15+
# - Use newer system xar and cpio instead of our own binaries
#
# 4.5 -- 2010-08-26
# - get rid of ternary conditionals for compatibility with 10.4/2.3 (grr.)
# - rip out AppleScript & use Platypus' progress bar instead
# - minor refactoring and menial fixes
#
# 4.5-beta -- 2010-08-24
# - finally: metapackage extraction!
# - use new ``droplet'' Platypus type
# - lots of behind-the-scenes changes
# - compile xar for 10.4/ppc, 10.4/i386, and 10.5/x86_64 from Apple's 10.6.4 version
# (http://opensource.apple.com/tarballs/xar/xar-36.1.tar.gz)
# - do the same with cpio
# - (http://www.opensource.apple.com/tarballs/libarchive/libarchive-14.tar.gz)
# - be more explicit about BSD licensed software
#
# 4.0 (final. really, this time!) -- 2009-01-15
# - 10.4 doesn't have "xar" and 10.5 has 1.4, which is really
# outdated. bundle a CVS snapshot r223 (further unmodified).
# - menial fixes and edits
#
# 4.0-pre (internal only) -- 2009-01-14
# - deals with errors much more gracefully
# - create temp folders properly
# - 10.4 has Python 2.3, which doesn't have subprocess (grr!)
# use os.system instead
# - other little interface changes here and there
# - new (and prettier!) icon
#
# 4.0-beta (internal-only release) -- 2009-01-13
# - competely re-written in Python
# - now works with multiple packages and new, 10.5-style packages
# - ripped out CocoaDialog, simplifying the interface
# - upgraded to the (much improved) Platypus 4.0, and its Web View
# (what happened to 3.0? it's what I called a few unreleased
# hack jobs in Cocoa/Python/Objective C...)
#
# Copyright (C) 2009-10 timdoug
#
# 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; version 2 of the License. (NOT
# 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, write to the Free Software Foundation, Inc.,
# 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
import os
import sys
import shutil
import tempfile
XAR_PATH = '/usr/bin/xar'
CPIO_PATH = '/usr/bin/cpio'
def get_extract_dir(pkg_path):
enclosing_path, pkg_name = os.path.split(os.path.splitext(pkg_path)[0])
# if the enclosing path is not writable, extract to Desktop
if not os.access(enclosing_path, os.W_OK):
enclosing_path = os.path.join(os.environ['HOME'], 'Desktop')
extract_dir = os.path.join(enclosing_path, pkg_name)
if os.path.exists(extract_dir):
orig_extract_dir = extract_dir
for i in range(1, 1000):
extract_dir = '%s-%s' % (orig_extract_dir, str(i))
if not os.path.exists(extract_dir): break
if i == 999: # I sure hope this never happens...
print('Cannot establish appropriate extraction directory.')
sys.exit()
return extract_dir
# Python 2.3 on OS X 10.4 doesn't have subprocess, so use this function instead
def run_in_path(cmd, path):
os.chdir(path)
os.system(cmd)
def find_pax(pkg_path):
for root, dirs, files in os.walk(pkg_path):
for file in files:
if file.endswith('.pax') or file.endswith('.pax.gz'):
return os.path.join(root, file)
return None
def extract_package(pkg_path, extract_dir):
# old style packages
if os.path.isdir(pkg_path):
pax_path = find_pax(pkg_path)
if not pax_path:
print('Cannot find pax file. (not a valid package?)')
return False
os.mkdir(extract_dir)
extract_prog = '/bin/pax -r < "%s"'
if pax_path[-3:] == '.gz':
extract_prog = '/usr/bin/gzcat "%s" | /bin/pax -r'
run_in_path(extract_prog % pax_path, extract_dir)
return True
# new (10.5) style packages
else:
# no 'with' for compatibility with python 2.3 (10.4)
try:
f = open(pkg_path, 'rb')
if f.read(4) != b'xar!':
print('Not a valid package.')
return False
except IOError:
print('Cannot read package.')
return False
else:
f.close()
temp_dir = tempfile.mkdtemp()
run_in_path('"%s" -xf "%s"' % (XAR_PATH, pkg_path), temp_dir)
payloads = []
for root, dirs, files in os.walk(temp_dir):
for file in [x for x in files if x == 'Payload']:
payloads.append(os.path.join(root, file))
os.mkdir(extract_dir)
extract_prog = '/usr/bin/gzcat "%s" | "' + CPIO_PATH + '" -i -m --quiet'
if len(payloads) == 0:
print('No payloads found.')
return False
elif len(payloads) == 1:
run_in_path(extract_prog % payloads[0], extract_dir)
else:
for payload in payloads:
subpack_name = os.path.splitext(os.path.basename(os.path.dirname(payload)))[0]
subpack_path = os.path.join(extract_dir, subpack_name)
os.mkdir(subpack_path)
run_in_path(extract_prog % payload, subpack_path)
shutil.rmtree(temp_dir)
return True
def main():
for pkg_path in sys.argv[1:]:
print('Extracting "%s"...' % os.path.splitext(os.path.basename(pkg_path))[0])
sys.stdout.flush()
if not os.access(pkg_path, os.R_OK):
print('Cannot read package.')
continue
extract_dir = get_extract_dir(pkg_path)
if pkg_path.endswith('.mpkg'):
os.mkdir(extract_dir)
count = 0
for root, dirs, files in os.walk(pkg_path):
for file in files + dirs:
if file.endswith('.pkg'):
subpkg_extract_dir = os.path.join(extract_dir, os.path.splitext(file)[0])
if extract_package(os.path.join(root, file), subpkg_extract_dir):
count += 1
if count > 0:
print('Extracted %d internal package%s to "%s".' % \
(count, ('', 's')[count > 1], extract_dir))
else:
shutil.rmtree(extract_dir)
print('No packages found within the metapackage.')
elif pkg_path.endswith('.pkg'):
if extract_package(pkg_path, extract_dir):
print('Extracted to "%s".' % extract_dir)
else:
print('Not a package.')
print('----------------------')
print('Done!')
if __name__ == '__main__':
main()