forked from RoliSoft/WSL-Distribution-Switcher
-
Notifications
You must be signed in to change notification settings - Fork 2
/
get-source.py
executable file
·172 lines (120 loc) · 5.09 KB
/
get-source.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
#!/usr/bin/env python3
# coding=utf-8
import sys
import urllib.request
from utils import Fore, parse_image_arg, chunked_copy, clear_progress, handle_sigint, ensure_ca_load
# handle arguments
handle_sigint()
ensure_ca_load()
if len(sys.argv) < 2:
print('usage: ./get-source.py image[:tag]')
sys.exit(-1)
image, tag, fname, label = parse_image_arg(sys.argv[1], False)
dfurl = ''
tgurl = ''
# find the Dockerfile for the specified image and tag
print('%s[*]%s Fetching official-images info for %s%s%s:%s%s%s...' % (Fore.GREEN, Fore.RESET, Fore.YELLOW, image, Fore.RESET, Fore.YELLOW, tag, Fore.RESET))
try:
with urllib.request.urlopen('https://raw.githubusercontent.com/docker-library/official-images/master/library/' + image) as f:
data = f.read().decode('utf-8').splitlines() + ['']
# there seems to be two versions for this file:
# a) simplistic one-line per tag:
# latest: git://github.com/oracle/docker-images.git@a44844fe085a561ded44865eafb63f742e4250c1 OracleLinux/7.2
# b) key-values spanning over multiple lines:
# GitRepo: https://github.com/CentOS/sig-cloud-instance-images.git
# Directory: docker
# Tags: latest, centos7, 7
# GitFetch: refs/heads/CentOS-7
# GitCommit: f5b919346432acc728078aa32ffb6dcf84d303a0
# try a) first
for line in data:
if line.startswith(tag + ': '):
# extract the parts
line = line.split(': ', 1)
line = line[1].split(' ', 1)
path = line[1]
line = line[0].split('@', 1)
repo = line[0]
commit = line[1]
repo = repo[repo.find('github.com/') + len('github.com/'):]
if repo.find('.git') != -1:
repo = repo[:repo.find('.git')]
if len(path) != 0:
path = '/' + path
# build direct URL to Dockerfile
dfurl = 'https://raw.githubusercontent.com/%s/%s%s/Dockerfile' % (repo, commit, path)
break
# try b) second
if not dfurl:
repo = ''
path = ''
commit = ''
isTag = False
for line in data:
if line == '':
# tags are separated by double new lines and we need to wait for all values
# before building the direct URL
if isTag and repo and commit:
dfurl = 'https://raw.githubusercontent.com/%s/%s%s/Dockerfile' % (repo, commit, path)
break
else:
continue
line = line.split(': ', 1)
# collect key-values
if line[0] == 'GitRepo':
repo = line[1]
repo = repo[repo.find('github.com/') + len('github.com/') : repo.find('.git')]
elif line[0] == 'Tags':
tags = line[1].split(', ')
isTag = tag in tags
elif line[0] == 'amd64-GitCommit':
commit = line[1]
elif line[0] == 'GitCommit':
if not commit:
commit = line[1]
elif line[0] == 'amd64-Directory':
path = '/' + line[1].strip('/')
elif line[0] == 'Directory':
if not path:
path = '/' + line[1].strip('/')
# otherwise, fail miserably
if not dfurl:
print('%s[!]%s Failed to find tag %s%s%s for image %s%s%s.' % (Fore.RED, Fore.RESET, Fore.BLUE, tag, Fore.RESET, Fore.BLUE, image, Fore.RESET))
sys.exit(-1)
except urllib.error.HTTPError as err:
print('%s[!]%s Failed to fetch official-images info for %s%s%s: %s' % (Fore.RED, Fore.RESET, Fore.BLUE, image, Fore.RESET, err))
print('%s[!]%s If this is not an official image, try getting it with %sget-prebuilt.py %s%s.' % (Fore.RED, Fore.RESET, Fore.GREEN, sys.argv[1].strip(), Fore.RESET))
sys.exit(-1)
# process Dockerfile
print('%s[*]%s Fetching Dockerfile from repo %s%s%s...' % (Fore.GREEN, Fore.RESET, Fore.BLUE, dfurl[dfurl.find('.com/') + len('.com/') : dfurl.find('/Dockerfile')], Fore.RESET))
try:
with urllib.request.urlopen(dfurl) as f:
data = f.read().decode('utf-8').splitlines()
for line in data:
line = line.split(' ')
# we are only interested in rootfs archives, generally specified like so:
# ADD oraclelinux-7.2-rootfs.tar.xz /
if line[0].lower() == 'add' and line[2] == '/':
tgurl = dfurl[:dfurl.rfind('/Dockerfile') + 1] + line[1]
fname += line[1][line[1].find('.tar'):]
# otherwise, fail miserably
if not tgurl:
print('%s[!]%s Failed to find a suitable rootfs specification in Dockerfile.' % (Fore.RED, Fore.RESET))
sys.exit(-1)
except urllib.error.HTTPError as err:
print('%s[!]%s Failed to fetch Dockerfile from %s%s%s: %s' % (Fore.RED, Fore.RESET, Fore.BLUE, dfurl, Fore.RESET, err))
sys.exit(-1)
# download rootfs archive
print('%s[*]%s Downloading archive %s%s%s...' % (Fore.GREEN, Fore.RESET, Fore.BLUE, tgurl, Fore.RESET))
try:
with urllib.request.urlopen(tgurl) as u, open(fname, 'wb') as f:
chunked_copy(fname, u, f)
except urllib.error.HTTPError as err:
clear_progress()
print('%s[!]%s Failed to download archive from %s%s%s: %s' % (Fore.RED, Fore.RESET, Fore.BLUE, tgurl, Fore.RESET, err))
sys.exit(-1)
except OSError as err:
clear_progress()
print('%s[!]%s Failed to open file %s%s%s for writing: %s' % (Fore.RED, Fore.RESET, Fore.BLUE, fname, Fore.RESET, err))
sys.exit(-1)
print('%s[*]%s Rootfs archive for %s%s%s:%s%s%s saved to %s%s%s.' % (Fore.GREEN, Fore.RESET, Fore.YELLOW, image, Fore.RESET, Fore.YELLOW, tag, Fore.RESET, Fore.GREEN, fname, Fore.RESET))