3 Helper code for file writing with optional compression.
5 @contact: Debian FTPMaster <ftpmaster@debian.org>
6 @copyright: 2011 Torsten Werner <twerner@debian.org>
7 @license: GNU General Public License version 2 or later
10 ################################################################################
12 # This program is free software; you can redistribute it and/or modify
13 # it under the terms of the GNU General Public License as published by
14 # the Free Software Foundation; either version 2 of the License, or
15 # (at your option) any later version.
17 # This program is distributed in the hope that it will be useful,
18 # but WITHOUT ANY WARRANTY; without even the implied warranty of
19 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
20 # GNU General Public License for more details.
22 # You should have received a copy of the GNU General Public License
23 # along with this program; if not, write to the Free Software
24 # Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
26 ################################################################################
28 from daklib.config import Config
30 from daklib.daksubprocess import check_call
34 class BaseFileWriter(object):
36 Base class for compressed and uncompressed file writing.
38 def __init__(self, template, **keywords):
40 The template argument is a string template like
41 "dists/%(suite)s/%(component)s/Contents-%(architecture)s.gz" that
42 should be relative to the archive's root directory. The keywords
43 include strings for suite, component, architecture and booleans
44 uncompressed, gzip, bzip2.
46 compression = keywords.get('compression', ['none'])
47 self.uncompressed = 'none' in compression
48 self.gzip = 'gzip' in compression
49 self.bzip2 = 'bzip2' in compression
50 self.xz = 'xz' in compression
51 self.path = template % keywords
55 Returns a file object for writing.
57 # create missing directories
59 os.makedirs(os.path.dirname(self.path))
62 self.file = open(self.path + '.new', 'w')
65 # internal helper function
66 def rename(self, filename):
67 tempfilename = filename + '.new'
68 os.chmod(tempfilename, 0o644)
69 os.rename(tempfilename, filename)
71 # internal helper function to compress output
72 def compress(self, cmd, suffix, path):
73 in_filename = "{0}.new".format(path)
74 out_filename = "{0}.{1}.new".format(path, suffix)
75 with open(in_filename, 'r') as in_fh, open(out_filename, 'w') as out_fh:
76 check_call(cmd, stdin=in_fh, stdout=out_fh)
77 self.rename("{0}.{1}".format(path, suffix))
81 Closes the file object and does the compression and rename work.
85 self.compress(['gzip', '-9cn', '--rsyncable'], 'gz', self.path)
87 self.compress(['bzip2', '-9'], 'bz2', self.path)
89 self.compress(['xz', '-c'], 'xz', self.path)
91 self.rename(self.path)
93 os.unlink(self.path + '.new')
95 class BinaryContentsFileWriter(BaseFileWriter):
96 def __init__(self, **keywords):
98 The value of the keywords suite, component, and architecture are
99 strings. The value of component may be omitted if not applicable.
100 Output files are gzip compressed only.
103 'compression': ['gzip'],
105 flags.update(keywords)
106 if flags['debtype'] == 'deb':
107 template = "%(archive)s/dists/%(suite)s/%(component)s/Contents-%(architecture)s"
109 template = "%(archive)s/dists/%(suite)s/%(component)s/Contents-udeb-%(architecture)s"
110 BaseFileWriter.__init__(self, template, **flags)
112 class SourceContentsFileWriter(BaseFileWriter):
113 def __init__(self, **keywords):
115 The value of the keywords suite and component are strings.
116 Output files are gzip compressed only.
119 'compression': ['gzip'],
121 flags.update(keywords)
122 template = "%(archive)s/dists/%(suite)s/%(component)s/Contents-source"
123 BaseFileWriter.__init__(self, template, **flags)
125 class PackagesFileWriter(BaseFileWriter):
126 def __init__(self, **keywords):
128 The value of the keywords suite, component, debtype and architecture
129 are strings. Output files are gzip compressed only.
132 'compression': ['gzip', 'xz'],
134 flags.update(keywords)
135 if flags['debtype'] == 'deb':
136 template = "%(archive)s/dists/%(suite)s/%(component)s/binary-%(architecture)s/Packages"
138 template = "%(archive)s/dists/%(suite)s/%(component)s/debian-installer/binary-%(architecture)s/Packages"
139 BaseFileWriter.__init__(self, template, **flags)
141 class SourcesFileWriter(BaseFileWriter):
142 def __init__(self, **keywords):
144 The value of the keywords suite and component are strings. Output
145 files are gzip compressed only.
148 'compression': ['gzip', 'xz'],
150 flags.update(keywords)
151 template = "%(archive)s/dists/%(suite)s/%(component)s/source/Sources"
152 BaseFileWriter.__init__(self, template, **flags)
154 class TranslationFileWriter(BaseFileWriter):
155 def __init__(self, **keywords):
157 The value of the keywords suite, component and language are strings.
158 Output files are bzip2 compressed only.
161 'compression': ['bzip2'],
164 flags.update(keywords)
165 template = "%(archive)s/dists/%(suite)s/%(component)s/i18n/Translation-%(language)s"
166 super(TranslationFileWriter, self).__init__(template, **flags)