livecd-rootfs/auto-markable-pkgs

64 lines
2.3 KiB

#!/usr/bin/python3
"""List the packages which could be automatically installed without becoming autoremovable
Finds all manually installed meta packages, and prints their dependencies
which could be marked as automatically installed.
"""
import sys
import apt
def is_root(pkg):
"""Check if the package is a root package (manually inst. meta)"""
section = pkg.candidate.section if pkg.candidate else ""
return (pkg.is_installed and
not pkg.is_auto_installed and
(section == "metapackages" or
section.endswith("/metapackages")))
def main():
"""Main function"""
cache = apt.Cache(rootdir=sys.argv[1] if len(sys.argv) > 1 else None)
roots = set(pkg for pkg in cache if is_root(pkg))
workset = set(roots)
seen = set()
ubiquity_depends = set()
with cache.actiongroup():
while True:
print("Iteration", file=sys.stderr)
to_proc = workset - seen
if not to_proc:
break
for pkg in sorted(to_proc):
print(" Visiting", pkg, file=sys.stderr)
if pkg not in roots and pkg not in ubiquity_depends:
if not pkg.is_auto_installed:
print(pkg.name)
for dep in (pkg.installed.dependencies +
pkg.installed.recommends):
for bdep in dep.or_dependencies:
for ver in bdep.target_versions:
if ver.package.is_installed:
if pkg.name == "ubiquity":
ubiquity_depends.add(ver.package)
if pkg.name != "ubiquity":
# Reprocess this package again, as we did not mark it when we visited it from ubiquity
try:
ubiquity_depends.remove(ver.package)
# This will raise the KeyError here if ubiquity did not depend on it
seen.remove(ver.package)
except KeyError:
pass
workset.add(ver.package)
seen.add(pkg)
if __name__ == '__main__':
main()