3 Helper code for contents generation.
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.dbconn import *
29 from daklib.config import Config
30 from daklib.threadpool import ThreadPool
32 from sqlalchemy import desc, or_
33 from subprocess import Popen, PIPE
37 class ContentsWriter(object):
39 ContentsWriter writes the Contents-$arch.gz files.
41 def __init__(self, suite, architecture, overridetype, component = None):
43 The constructor clones its arguments into a new session object to make
44 sure that the new ContentsWriter object can be executed in a different
47 self.suite = suite.clone()
48 self.session = self.suite.session()
49 self.architecture = architecture.clone(self.session)
50 self.overridetype = overridetype.clone(self.session)
51 if component is not None:
52 self.component = component.clone(self.session)
58 Returns a query object that is doing most of the work.
61 'suite': self.suite.suite_id,
62 'arch_all': get_architecture('all', self.session).arch_id,
63 'arch': self.architecture.arch_id,
64 'type_id': self.overridetype.overridetype_id,
65 'type': self.overridetype.overridetype,
68 if self.component is not None:
69 params['component'] = component.component_id
71 create temp table newest_binaries (
72 id integer primary key,
75 create index newest_binaries_by_package on newest_binaries (package);
77 insert into newest_binaries (id, package)
78 select distinct on (package) id, package from binaries
79 where type = :type and
80 (architecture = :arch_all or architecture = :arch) and
81 id in (select bin from bin_associations where suite = :suite)
82 order by package, version desc;
87 (select o.package, s.section
88 from override o, section s
89 where o.suite = :suite and o.type = :type_id and o.section = s.id and
90 o.component = :component)
92 select bc.file, substring(o.section from position('/' in o.section) + 1) || '/' || b.package as package
93 from newest_binaries b, bin_contents bc, unique_override o
94 where b.id = bc.binary_id and o.package = b.package
95 order by bc.file, b.package'''
99 create temp table newest_binaries (
100 id integer primary key,
103 create index newest_binaries_by_package on newest_binaries (package);
105 insert into newest_binaries (id, package)
106 select distinct on (package) id, package from binaries
107 where type = :type and
108 (architecture = :arch_all or architecture = :arch) and
109 id in (select bin from bin_associations where suite = :suite)
110 order by package, version desc;
115 (select distinct on (o.package, s.section) o.package, s.section
116 from override o, section s
117 where o.suite = :suite and o.type = :type_id and o.section = s.id
118 order by o.package, s.section, o.modified desc)
120 select bc.file, substring(o.section from position('/' in o.section) + 1) || '/' || b.package as package
121 from newest_binaries b, bin_contents bc, unique_override o
122 where b.id = bc.binary_id and o.package = b.package
123 order by bc.file, b.package'''
125 return self.session.query("file", "package").from_statement(sql). \
128 def formatline(self, filename, package_list):
130 Returns a formatted string for the filename argument.
132 package_list = ','.join(package_list)
133 return "%-55s %s\n" % (filename, package_list)
137 Yields a new line of the Contents-$arch.gz file in filename order.
141 for filename, package in self.query().yield_per(100):
142 if filename != last_filename:
143 if last_filename is not None:
144 yield self.formatline(last_filename, package_list)
145 last_filename = filename
147 package_list.append(package)
148 yield self.formatline(last_filename, package_list)
149 # end transaction to return connection to pool
150 self.session.rollback()
154 Returns a list of lines for the Contents-$arch.gz file.
156 return [item for item in self.fetch()]
158 def output_filename(self):
160 Returns the name of the output file.
163 'root': Config()['Dir::Root'],
164 'suite': self.suite.suite_name,
165 'architecture': self.architecture.arch_string
167 if self.component is None:
168 return "%(root)s%(suite)s/Contents-%(architecture)s.gz" % values
169 values['component'] = self.component.component_name
170 return "%(root)s%(suite)s/%(component)s/Contents-%(architecture)s.gz" % values
172 def get_header(self):
174 Returns the header for the Contents files as a string.
178 filename = os.path.join(Config()['Dir::Templates'], 'contents')
179 header_file = open(filename)
180 return header_file.read()
185 def write_file(self):
187 Write the output file.
189 command = ['gzip', '--rsyncable']
190 output_file = open(self.output_filename(), 'w')
191 pipe = Popen(command, stdin = PIPE, stdout = output_file).stdin
192 pipe.write(self.get_header())
193 for item in self.fetch():
199 class ContentsScanner(object):
201 ContentsScanner provides a threadsafe method scan() to scan the contents of
204 def __init__(self, binary):
206 The argument binary is the actual DBBinary object that should be
209 self.binary_id = binary.binary_id
211 def scan(self, dummy_arg = None):
213 This method does the actual scan and fills in the associated BinContents
214 property. It commits any changes to the database. The argument dummy_arg
215 is ignored but needed by our threadpool implementation.
217 session = DBConn().session()
218 binary = session.query(DBBinary).get(self.binary_id)
219 for filename in binary.scan_contents():
220 binary.contents.append(BinContents(file = filename))
225 def scan_all(class_, limit = None):
227 The class method scan_all() scans all binaries using multiple threads.
228 The number of binaries to be scanned can be limited with the limit
229 argument. Returns the number of processed and remaining packages as a
232 session = DBConn().session()
233 query = session.query(DBBinary).filter(DBBinary.contents == None)
234 remaining = query.count
235 if limit is not None:
236 query = query.limit(limit)
237 processed = query.count()
238 threadpool = ThreadPool()
239 for binary in query.yield_per(100):
240 threadpool.queueTask(ContentsScanner(binary).scan)
242 remaining = remaining()
244 return { 'processed': processed, 'remaining': remaining }