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# vim: set fileencoding=utf-8 :
#
# (C) 2006,2007 Guido Guenther <agx@sigxcpu.org>
"""provides some debian source package related helpers"""
import commands
import email
import os
import re
import shutil
import sys
import command_wrappers as gbpc
from errors import GbpError
# When trying to parse a version-number from a dsc or changes file, these are
# the valid characters.
debian_version_chars = 'a-zA-Z\d.~+-'
class NoChangelogError(Exception):
"""no changelog found"""
pass
class ParseChangeLogError(Exception):
"""problem parsing changelog"""
pass
class DscFile(object):
"""Keeps all needed data read from a dscfile"""
pkg_re = re.compile('Source:\s+(?P<pkg>.+)\s*')
version_re = re.compile("Version:\s(\d+\:)?(?P<version>[%s]+)\s*$" % debian_version_chars)
tar_re = re.compile('^\s\w+\s\d+\s+(?P<tar>[^_]+_[^_]+(\.orig)?\.tar\.(gz|bz2))')
diff_re = re.compile('^\s\w+\s\d+\s+(?P<diff>[^_]+_[^_]+\.diff.(gz|bz2))')
def __init__(self, dscfile):
self.pkg = ""
self.tgz = ""
self.diff = ""
self.upstream_version = ""
self.dscfile = os.path.abspath(dscfile)
f = file(self.dscfile)
fromdir = os.path.dirname(os.path.abspath(dscfile))
for line in f:
m = self.version_re.match(line)
if m and not self.upstream_version:
if '-' in m.group('version'):
self.debian_version = m.group('version').split("-")[-1]
self.upstream_version = "-".join(m.group('version').split("-")[0:-1])
self.native = False
else:
self.native = True # Debian native package
self.upstream_version = m.group('version')
continue
m = self.pkg_re.match(line)
if m:
self.pkg = m.group('pkg')
continue
m = self.tar_re.match(line)
if m:
self.tgz = os.path.join(fromdir, m.group('tar'))
continue
m = self.diff_re.match(line)
if m:
self.diff = os.path.join(fromdir, m.group('diff'))
continue
f.close()
if not self.pkg:
raise GbpError, "Cannot parse package name from %s" % self.dscfile
elif not self.tgz:
raise GbpError, "Cannot parse archive name from %s" % self.dscfile
def _get_version(self):
if self.native:
return self.upstream_version
else:
return "%s-%s" % (self.upstream_version, self.debian_version)
version = property(_get_version)
def __str__(self):
return "<%s object %s>" % (self.__class__.__name__, self.dscfile)
def parse_dsc(dscfile):
"""parse dsc by creating a DscFile object"""
try:
dsc = DscFile(dscfile)
except IOError, err:
raise GbpError, "Error reading dsc file: %s" % err
else:
try:
if dsc.native:
print "Debian Native Package"
print "Version:", dsc.upstream_version
else:
print "Upstream version:", dsc.upstream_version
print "Debian version:", dsc.debian_version
except AttributeError:
raise GbpError, "Error parsing dsc file %s" % dscfile
return dsc
def parse_changelog(changelog):
"""parse changelog file changelog"""
if not os.access(changelog, os.F_OK):
raise NoChangelogError, "Changelog %s not found" % (changelog, )
status, output = commands.getstatusoutput('dpkg-parsechangelog -l%s' % (changelog, ))
if status:
raise ParseChangeLogError, output
cp = email.message_from_string(output)
if '-' in cp['Version']:
upstream_version, cp['Debian-Version'] = cp['Version'].rsplit('-', 1)
if ':' in upstream_version:
cp['Epoch'], cp['Upstream-Version'] = upstream_version.split(':', 1)
else:
cp['Upstream-Version'] = upstream_version
else:
cp['Debian-Version'] = cp['Version']
return cp
def orig_file(cp):
"The name of the orig.tar.gz belonging to changelog cp"
return "%s_%s.orig.tar.gz" % (cp['Source'], cp['Upstream-Version'])
def is_native(cp):
"Is this a debian native package"
return [ True, False ]['-' in cp['Version']]
def has_epoch(cp):
"""does the topmost version number contain an epoch"""
try:
if cp['Epoch']:
return True
except KeyError:
return False
def has_orig(cp, dir):
"Check if orig.tar.gz exists in dir"
try:
os.stat( os.path.join(dir, orig_file(cp)) )
except OSError:
return False
return True
def symlink_orig(cp, orig_dir, output_dir, force=False):
"""
symlink orig.tar.gz from orig_dir to output_dir
@return: True if link was created or src == dst
False in case of errror or src doesn't exist
"""
orig_dir = os.path.abspath(orig_dir)
output_dir = os.path.abspath(output_dir)
if orig_dir == output_dir:
return True
src = os.path.join(orig_dir, orig_file(cp))
dst = os.path.join(output_dir, orig_file(cp))
if not os.access(src, os.F_OK):
return False
try:
if os.access(dst, os.F_OK) and force:
os.unlink(dst)
print src, dst
os.symlink(src, dst)
except OSError:
return False
return True
def unpack_orig(archive, tmpdir, filters):
"""
unpack a .orig.tar.gz to tmpdir, leave the cleanup to the caller in case of
an error
"""
try:
unpackArchive = gbpc.UnpackTarArchive(archive, tmpdir, filters)
unpackArchive()
except gbpc.CommandExecFailed:
print >>sys.stderr, "Unpacking of %s failed" % archive
raise GbpError
return unpackArchive.dir
def _test():
import doctest
doctest.testmod()
if __name__ == '__main__':
_test()
# vim:et:ts=4:sw=4:et:sts=4:ai:set list listchars=tab\:»·,trail\:·:
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