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#! /usr/bin/python
# Copyright (c) 2009, 2010 The Chromium OS Authors. All rights reserved.
# Copyright (c) 2010 Canonical Ltd.
# Use of this source code is governed by a BSD-style license that can be
# found in the LICENSE file.
# Written by Colin Watson for Canonical Ltd.
import os
import re
import ConfigParser
import shutil
try:
from debian import deb822, changelog
except ImportError:
from debian_bundle import deb822, changelog
re_dep = re.compile(
r'^\s*(?P<name>[a-zA-Z0-9.+\-]{2,}|\${[^}]*})(\s*\(\s*(?P<relop>[>=<]+)\s*(?P<version>[0-9a-zA-Z:\-+~.]+|\${[^}]*})\s*\))?(\s*\[(?P<archs>[\s!\w\-]+)\])?\s*$')
re_comma_sep = re.compile(r'\s*,\s*')
re_pipe_sep = re.compile(r'\s*\|\s*')
re_blank_sep = re.compile(r'\s*')
# This is derived from deb822.PkgRelations.parse_relations, but we want to
# treat substvars in an intelligent way. We make the following assumptions:
#
# * All automatically generated dependencies will be satisfied by
# build-dependencies too (fairly safe).
# * Anyone that depends on an automatically generated Provides will, with
# any luck, also build-depend on something that causes the same source
# package to be built (less safe, but probably not too unsound).
# * Any automatically generated versions in dependencies will normally be
# within the same source package, and may be safely discarded.
__pychecker__ = 'unusednames=cls'
class MyPkgRelation(deb822.PkgRelation):
@classmethod
def parse_relations(cls, raw):
def parse_archs(raw):
# assumption: no space beween '!' and architecture name
archs = []
for arch in re_blank_sep.split(raw.strip()):
if len(arch) and arch[0] == '!':
archs.append((False, arch[1:]))
else:
archs.append((True, arch))
return archs
def parse_rel(raw):
match = re_dep.match(raw)
if match:
parts = match.groupdict()
if parts['name'].startswith('${'):
return
d = { 'name': parts['name'] }
if not (parts['relop'] is None or parts['version'] is None):
if parts['version'].startswith('${'):
d['version'] = None
else:
d['version'] = (parts['relop'], parts['version'])
else:
d['version'] = None
if parts['archs'] is None:
d['arch'] = None
else:
d['arch'] = parse_archs(parts['archs'])
return d
tl_deps = re_comma_sep.split(raw.strip()) # top-level deps
cnf = map(re_pipe_sep.split, tl_deps)
return filter(None,
map(lambda or_deps: filter(None,
map(parse_rel, or_deps)),
cnf))
deb822.PkgRelation.parse_relations = MyPkgRelation.parse_relations
def get_control_lines(sequence):
"""Strip comments from a control file so that deb822 can handle them."""
new_sequence = []
# As well as stripping comments, make sure that there's only one blank
# line between each stanza, and no leading blank lines.
expect_next_stanza = True
for line in sequence:
if line.startswith('#'):
continue
if line.rstrip('\n'):
new_sequence.append(line)
expect_next_stanza = False
elif not expect_next_stanza:
new_sequence.append('\n')
expect_next_stanza = True
return new_sequence
srcdir = None
dirsrc = None
pkgsrc = None
srcpkgs = None
srcrec = None
pkgrec = None
provides = None
def init_cache():
global srcdir, dirsrc, pkgsrc, srcpkgs, srcrec, pkgrec, provides
if srcdir is None:
srcdir = {}
dirsrc = {}
pkgsrc = {}
srcpkgs = {}
srcrec = {}
pkgrec = {}
provides = {}
def scan_dir(path):
init_cache()
if os.path.exists('%s/xdeb.cfg' % path):
config = ConfigParser.SafeConfigParser()
config.read('%s/xdeb.cfg' % path)
try:
path = '%s/%s' % (path, config.get('Package', 'directory'))
except (ConfigParser.NoSectionError, ConfigParser.NoOptionError):
pass
try:
debian_symlink = config.get('Package', 'debian_symlink')
create_symlink = True
if os.path.islink('%s/debian' % path):
if os.readlink('%s/debian' % path) == debian_symlink:
create_symlink = False
else:
os.unlink('%s/debian' % path)
elif os.path.exists('%s/debian' % path):
shutil.rmtree('%s/debian' % path)
if create_symlink:
print "Creating debian -> %s symlink in %s" % (debian_symlink,
path)
os.symlink(debian_symlink, '%s/debian' % path)
except (ConfigParser.NoSectionError, ConfigParser.NoOptionError):
pass
try:
control_file = open('%s/debian/control' % path)
except IOError:
return False
control_lines = get_control_lines(control_file)
control_file.close()
stanzas = deb822.Deb822.iter_paragraphs(control_lines, use_apt_pkg=False)
try:
src_stanza = stanzas.next()
except StopIteration:
return False
if 'source' not in src_stanza:
return False
src = src_stanza['source']
srcdir[src] = path
dirsrc[path] = src
srcrec[src] = deb822.Sources(src_stanza)
for stanza in stanzas:
if 'package' not in stanza:
continue
pkg = stanza['package']
pkgrec[pkg] = deb822.Packages(stanza)
pkgsrc[pkg] = src
srcpkgs.setdefault(src, [])
srcpkgs[src].append(pkg)
if 'provides' in stanza:
provs = stanza['provides'].strip()
for prov in deb822.PkgRelation.parse_relations(provs):
if prov:
provides.setdefault(prov[0]['name'], [])
provides[prov[0]['name']].append(pkg)
return True
def build_cache(options):
if srcdir is not None:
return
init_cache()
print "Building working tree cache ..."
# Build cache from the current contents of the working tree.
for builddir in options.builddirs:
for name in sorted(os.listdir(builddir)):
path = os.path.join(builddir, name)
if os.path.isdir(path):
if scan_dir(path):
continue
files_path_hack = os.path.join(path, 'files')
if os.path.isdir(files_path_hack):
if scan_dir(files_path_hack):
continue
src_path_hack = os.path.join(path, 'src')
if os.path.isdir(src_path_hack):
scan_dir(src_path_hack)
def get_src_directory(options, src):
build_cache(options)
return srcdir.get(src)
def get_directory_src(options, path):
build_cache(options)
return dirsrc.get(path)
class MultipleProvidesException(RuntimeError):
pass
def get_real_pkg(options, pkg):
"""Get the real name of binary package pkg, resolving Provides."""
build_cache(options)
if pkg in pkgsrc:
return pkg
elif pkg in provides:
if len(provides[pkg]) > 1:
raise MultipleProvidesException, \
"Multiple packages provide %s; package must select one" % pkg
else:
return provides[pkg][0]
def get_src_name(options, pkg):
"""Return the name of the source package that produces binary package
pkg."""
build_cache(options)
real_pkg = get_real_pkg(options, pkg)
if real_pkg:
return pkgsrc[real_pkg]
else:
return None
def get_src_record(options, src):
"""Return a parsed source package record for source package src."""
build_cache(options)
if src in srcrec:
return srcrec[src]
else:
return None
def get_pkg_record(options, pkg):
"""Return a parsed binary package record for binary package pkg."""
build_cache(options)
if pkg in pkgrec:
return pkgrec[pkg]
else:
return None
def get_src_version(options, src):
"""Return the version of the working tree for source package src."""
try:
changelog_file = open('%s/debian/changelog' %
get_src_directory(options, src))
except IOError:
return None
try:
cl = changelog.Changelog(file=changelog_file, max_blocks=1)
if cl.get_versions():
return str(cl.version)
else:
return None
finally:
changelog_file.close()
def get_src_binaries(options, src):
"""Return all the binaries produced by source package src."""
build_cache(options)
if src in srcpkgs:
return srcpkgs[src]
else:
return None
def architectures(options, src):
try:
control_file = open('%s/debian/control' %
get_src_directory(options, src))
except IOError:
return set()
control_lines = get_control_lines(control_file)
control_file.close()
architectures = set()
# apt_pkg is quicker, but breaks if the control file contains comments.
stanzas = deb822.Deb822.iter_paragraphs(control_lines, use_apt_pkg=False)
stanzas.next() # discard source stanza
for stanza in stanzas:
if 'architecture' not in stanza:
architectures.add('any')
else:
architectures.update(stanza['architecture'].split())
return architectures
def all_packages(options):
build_cache(options)
return sorted(set(srcdir.keys()) - set(options.exclude))
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