X-Git-Url: https://git.decadent.org.uk/gitweb/?a=blobdiff_plain;f=daklib%2Fcontents.py;h=577a45aab3b6324d05bcb8c95b00d27c73f5e7f1;hb=ed48066b1d8974fc525ba0d67d3da6ca0f7fa02c;hp=4a0b3ae25237fe8a0b63b25f284d9d0e31903a04;hpb=e2ab59085f36e9fec253cb2b473595409ba99bd2;p=dak.git

diff --git a/daklib/contents.py b/daklib/contents.py
index 4a0b3ae2..577a45aa 100755
--- a/daklib/contents.py
+++ b/daklib/contents.py
@@ -29,20 +29,17 @@ from daklib.dbconn import *
 from daklib.config import Config
 
 from multiprocessing import Pool
-from subprocess import Popen, PIPE
+from shutil import rmtree
+from subprocess import Popen, PIPE, check_call
+from tempfile import mkdtemp
 
 import os.path
 
-class ContentsWriter(object):
+class BinaryContentsWriter(object):
     '''
-    ContentsWriter writes the Contents-$arch.gz files.
+    BinaryContentsWriter writes the Contents-$arch.gz files.
     '''
     def __init__(self, suite, architecture, overridetype, component = None):
-        '''
-        The constructor clones its arguments into a new session object to make
-        sure that the new ContentsWriter object can be executed in a different
-        thread.
-        '''
         self.suite = suite
         self.architecture = architecture
         self.overridetype = overridetype
@@ -188,13 +185,123 @@ select bc.file, string_agg(o.section || '/' || b.package, ',' order by b.package
         gzip.stdin.close()
         output_file.close()
         gzip.wait()
-        try:
-            os.remove(final_filename)
-        except:
-            pass
+        os.chmod(temp_filename, 0664)
+        os.rename(temp_filename, final_filename)
+
+
+class SourceContentsWriter(object):
+    '''
+    SourceContentsWriter writes the Contents-source.gz files.
+    '''
+    def __init__(self, suite, component):
+        self.suite = suite
+        self.component = component
+        self.session = suite.session()
+
+    def query(self):
+        '''
+        Returns a query object that is doing most of the work.
+        '''
+        params = {
+            'suite_id':     self.suite.suite_id,
+            'component_id': self.component.component_id,
+        }
+
+        sql = '''
+create temp table newest_sources (
+    id integer primary key,
+    source text);
+
+create index sources_binaries_by_source on newest_sources (source);
+
+insert into newest_sources (id, source)
+    select distinct on (source) s.id, s.source from source s
+        join files f on f.id = s.file
+        join location l on l.id = f.location
+        where s.id in (select source from src_associations where suite = :suite_id)
+            and l.component = :component_id
+        order by source, version desc;
+
+select sc.file, string_agg(s.source, ',' order by s.source) as pkglist
+    from newest_sources s, src_contents sc
+    where s.id = sc.source_id group by sc.file'''
+
+        return self.session.query("file", "pkglist").from_statement(sql). \
+            params(params)
+
+    def formatline(self, filename, package_list):
+        '''
+        Returns a formatted string for the filename argument.
+        '''
+        return "%s\t%s\n" % (filename, package_list)
+
+    def fetch(self):
+        '''
+        Yields a new line of the Contents-source.gz file in filename order.
+        '''
+        for filename, package_list in self.query().yield_per(100):
+            yield self.formatline(filename, package_list)
+        # end transaction to return connection to pool
+        self.session.rollback()
+
+    def get_list(self):
+        '''
+        Returns a list of lines for the Contents-source.gz file.
+        '''
+        return [item for item in self.fetch()]
+
+    def output_filename(self):
+        '''
+        Returns the name of the output file.
+        '''
+        values = {
+            'root':      Config()['Dir::Root'],
+            'suite':     self.suite.suite_name,
+            'component': self.component.component_name
+        }
+        return "%(root)s/dists/%(suite)s/%(component)s/Contents-source.gz" % values
+
+    def write_file(self):
+        '''
+        Write the output file.
+        '''
+        command = ['gzip', '--rsyncable']
+        final_filename = self.output_filename()
+        temp_filename = final_filename + '.new'
+        output_file = open(temp_filename, 'w')
+        gzip = Popen(command, stdin = PIPE, stdout = output_file)
+        for item in self.fetch():
+            gzip.stdin.write(item)
+        gzip.stdin.close()
+        output_file.close()
+        gzip.wait()
+        os.chmod(temp_filename, 0664)
         os.rename(temp_filename, final_filename)
-        os.chmod(final_filename, 0664)
 
+
+def generate_helper(suite_id, arch_id, overridetype_id, component_id = None):
+    '''
+    This function is called in a new subprocess.
+    '''
+    session = DBConn().session()
+    suite = Suite.get(suite_id, session)
+    architecture = Architecture.get(arch_id, session)
+    overridetype = OverrideType.get(overridetype_id, session)
+    log_message = [suite.suite_name, architecture.arch_string, overridetype.overridetype]
+    if component_id is None:
+        component = None
+    else:
+        component = Component.get(component_id, session)
+        log_message.append(component.component_name)
+    contents_writer = BinaryContentsWriter(suite, architecture, overridetype, component)
+    contents_writer.write_file()
+    return log_message
+
+class ContentsWriter(object):
+    '''
+    Loop over all suites, architectures, overridetypes, and components to write
+    all contents files.
+    '''
     @classmethod
     def log_result(class_, result):
         '''
@@ -237,29 +344,11 @@ select bc.file, string_agg(o.section || '/' || b.package, ',' order by b.package
         pool.join()
         session.close()
 
-def generate_helper(suite_id, arch_id, overridetype_id, component_id = None):
-    '''
-    This function is called in a new subprocess.
-    '''
-    session = DBConn().session()
-    suite = Suite.get(suite_id, session)
-    architecture = Architecture.get(arch_id, session)
-    overridetype = OverrideType.get(overridetype_id, session)
-    log_message = [suite.suite_name, architecture.arch_string, overridetype.overridetype]
-    if component_id is None:
-        component = None
-    else:
-        component = Component.get(component_id, session)
-        log_message.append(component.component_name)
-    contents_writer = ContentsWriter(suite, architecture, overridetype, component)
-    contents_writer.write_file()
-    return log_message
-
 
-class ContentsScanner(object):
+class BinaryContentsScanner(object):
     '''
-    ContentsScanner provides a threadsafe method scan() to scan the contents of
-    a DBBinary object.
+    BinaryContentsScanner provides a threadsafe method scan() to scan the
+    contents of a DBBinary object.
     '''
     def __init__(self, binary_id):
         '''
@@ -300,16 +389,137 @@ class ContentsScanner(object):
         processed = query.count()
         pool = Pool()
         for binary in query.yield_per(100):
-            pool.apply_async(scan_helper, (binary.binary_id, ))
+            pool.apply_async(binary_scan_helper, (binary.binary_id, ))
         pool.close()
         pool.join()
         remaining = remaining()
         session.close()
         return { 'processed': processed, 'remaining': remaining }
 
-def scan_helper(binary_id):
+def binary_scan_helper(binary_id):
     '''
     This function runs in a subprocess.
     '''
-    scanner = ContentsScanner(binary_id)
+    scanner = BinaryContentsScanner(binary_id)
     scanner.scan()
+
+
+class UnpackedSource(object):
+    '''
+    UnpackedSource extracts a source package into a temporary location and
+    gives you some convinient function for accessing it.
+    '''
+    def __init__(self, dscfilename):
+        '''
+        The dscfilename is a name of a DSC file that will be extracted.
+        '''
+        self.root_directory = os.path.join(mkdtemp(), 'root')
+        command = ('dpkg-source', '--no-copy', '--no-check', '-x', dscfilename,
+            self.root_directory)
+        # dpkg-source does not have a --quiet option
+        devnull = open(os.devnull, 'w')
+        check_call(command, stdout = devnull, stderr = devnull)
+        devnull.close()
+
+    def get_root_directory(self):
+        '''
+        Returns the name of the package's root directory which is the directory
+        where the debian subdirectory is located.
+        '''
+        return self.root_directory
+
+    def get_changelog_file(self):
+        '''
+        Returns a file object for debian/changelog or None if no such file exists.
+        '''
+        changelog_name = os.path.join(self.root_directory, 'debian', 'changelog')
+        try:
+            return open(changelog_name)
+        except IOError:
+            return None
+
+    def get_all_filenames(self):
+        '''
+        Returns an iterator over all filenames. The filenames will be relative
+        to the root directory.
+        '''
+        skip = len(self.root_directory) + 1
+        for root, _, files in os.walk(self.root_directory):
+            for name in files:
+                yield os.path.join(root[skip:], name)
+
+    def cleanup(self):
+        '''
+        Removes all temporary files.
+        '''
+        if self.root_directory is None:
+            return
+        parent_directory = os.path.dirname(self.root_directory)
+        rmtree(parent_directory)
+        self.root_directory = None
+
+    def __del__(self):
+        '''
+        Enforce cleanup.
+        '''
+        self.cleanup()
+
+
+class SourceContentsScanner(object):
+    '''
+    SourceContentsScanner provides a method scan() to scan the contents of a
+    DBSource object.
+    '''
+    def __init__(self, source_id):
+        '''
+        The argument source_id is the id of the DBSource object that
+        should be scanned.
+        '''
+        self.source_id = source_id
+
+    def scan(self):
+        '''
+        This method does the actual scan and fills in the associated SrcContents
+        property. It commits any changes to the database.
+        '''
+        session = DBConn().session()
+        source = session.query(DBSource).get(self.source_id)
+        fileset = set(source.scan_contents())
+        for filename in fileset:
+            source.contents.append(SrcContents(file = filename))
+        session.commit()
+        session.close()
+
+    @classmethod
+    def scan_all(class_, limit = None):
+        '''
+        The class method scan_all() scans all source using multiple processes.
+        The number of sources to be scanned can be limited with the limit
+        argument. Returns the number of processed and remaining packages as a
+        dict.
+        '''
+        session = DBConn().session()
+        query = session.query(DBSource).filter(DBSource.contents == None)
+        remaining = query.count
+        if limit is not None:
+            query = query.limit(limit)
+        processed = query.count()
+        pool = Pool()
+        for source in query.yield_per(100):
+            pool.apply_async(source_scan_helper, (source.source_id, ))
+        pool.close()
+        pool.join()
+        remaining = remaining()
+        session.close()
+        return { 'processed': processed, 'remaining': remaining }
+
+def source_scan_helper(source_id):
+    '''
+    This function runs in a subprocess.
+    '''
+    try:
+        scanner = SourceContentsScanner(source_id)
+        scanner.scan()
+    except Exception, e:
+        print e
+