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#!/usr/bin/python3
# this is a example how to access the build dependencies of a package
import sys
import apt_pkg
def get_source_pkg(pkg, records, depcache):
"""get the source package name of a given package"""
version = depcache.get_candidate_ver(pkg)
if not version:
return None
file, index = version.file_list.pop(0)
records.lookup((file, index))
if records.source_pkg != "":
srcpkg = records.source_pkg
else:
srcpkg = pkg.name
return srcpkg
# main
apt_pkg.init()
cache = apt_pkg.Cache()
depcache = apt_pkg.DepCache(cache)
depcache.init()
records = apt_pkg.PackageRecords(cache)
srcrecords = apt_pkg.SourceRecords()
# base package that we use for build-depends calculation
if len(sys.argv) < 2:
print("need a package name as argument")
sys.exit(1)
try:
pkg = base = cache[sys.argv[1]]
except KeyError:
print("No package %s found" % sys.argv[1])
sys.exit(1)
all_build_depends = set()
# get the build depdends for the package itself
srcpkg_name = get_source_pkg(base, records, depcache)
print("srcpkg_name: %s " % srcpkg_name)
if not srcpkg_name:
print("Can't find source package for '%s'" % pkg.mame)
srcrec = srcrecords.lookup(srcpkg_name)
if srcrec:
print("Files:")
print(srcrecords.files)
bd = srcrecords.build_depends
print("build-depends of the package: %s " % bd)
for b in bd:
all_build_depends.add(b[0])
# calculate the build depends for all dependencies
depends = depcache.get_candidate_ver(base).depends_list
for dep in depends["Depends"]: # FIXME: do we need to consider PreDepends?
pkg = dep[0].target_pkg
srcpkg_name = get_source_pkg(pkg, records, depcache)
if not srcpkg_name:
print("Can't find source package for '%s'" % pkg.name)
continue
srcrec = srcrecords.lookup(srcpkg_name)
if srcrec:
# print srcrecords.package
# print srcrecords.binaries
bd = srcrecords.build_depends
# print "%s: %s " % (srcpkg_name, bd)
for b in bd:
all_build_depends.add(b[0])
print("\n".join(all_build_depends))
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