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Add support for loading faux packages

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Part of GH#5.

Signed-off-by: Niels Thykier <niels@thykier.net>
This commit is contained in:
Niels Thykier 2016-05-07 12:36:49 +00:00
parent 58b704f3d0
commit 398c7a4959
1 changed files with 73 additions and 0 deletions
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73
britney.py
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@ -319,9 +319,17 @@ class Britney(object):
try:
constraints_file = os.path.join(self.options.static_input_dir, 'constraints')
faux_packages = os.path.join(self.options.static_input_dir, 'faux-packages')
except AttributeError:
self.log("The static_input_dir option is not set", type='I')
constraints_file = None
faux_packages = None
if faux_packages is not None and os.path.exists(faux_packages):
self.log("Loading faux packages from %s" % faux_packages, type='I')
self._load_faux_packages(faux_packages)
else:
self.log("No Faux packages as %s does not exist" % faux_packages, type='I')
if constraints_file is not None and os.path.exists(constraints_file):
self.log("Loading constraints from %s" % constraints_file, type='I')
self.constraints = self._load_constraints(constraints_file)
@ -491,6 +499,71 @@ class Britney(object):
if self.options.verbose or type in ("E", "W"):
print("%s: [%s] - %s" % (type, time.asctime(), msg))
def _load_faux_packages(self, faux_packages_file):
"""Loads fake packages
In rare cases, it is useful to create a "fake" package that can be used to satisfy
dependencies. This is usually needed for packages that are not shipped directly
on this mirror but is a prerequisite for using this mirror (e.g. some vendors provide
non-distributable "setup" packages and contrib/non-free packages depend on these).
:param faux_packages_file: Path to the file containing the fake package definitions
"""
tag_file = apt_pkg.TagFile(faux_packages_file)
get_field = tag_file.section.get
step = tag_file.step
no = 0
while step():
no += 1
pkg_name = get_field('Package', None)
if pkg_name is None:
raise ValueError("Missing Fake-Package-Name field in paragraph %d (file %s)" % (no, faux_packages_file))
pkg_name = sys.intern(pkg_name)
version = sys.intern(get_field('Version', '1.0-1'))
provides_raw = get_field('Provides')
archs_raw = get_field('Architecture', None)
component = get_field('Component', 'main')
if archs_raw:
archs = archs_raw.split()
else:
archs = self.options.architectures
faux_section = 'faux'
if component != 'main':
faux_section = "%s/faux" % component
src_data = [version,
sys.intern(faux_section),
[],
None,
True,
]
self.sources['testing'][pkg_name] = src_data
self.sources['unstable'][pkg_name] = src_data
for arch in archs:
pkg_id = (pkg_name, version, arch)
if provides_raw:
provides = self._parse_provides(pkg_id, provides_raw)
else:
provides = []
bin_data = BinaryPackage(version,
faux_section,
pkg_name,
version,
arch,
get_field('Multi-Arch'),
None,
None,
provides,
False,
)
src_data[BINARIES].append(pkg_id)
self.binaries['testing'][arch][0][pkg_name] = bin_data
self.binaries['unstable'][arch][0][pkg_name] = bin_data
self.all_binaries[pkg_id] = bin_data
def _load_constraints(self, constraints_file):
"""Loads configurable constraints