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#!/usr/bin/env python
# Copyright 2011 Gentoo Foundation
# Distributed under the terms of the GNU General Public License v2
import optparse
import os
import random
import types
os.environ["PORTDIR_OVERLAY"] = ""
import portage
def process_deps(deps, use=None):
if not use:
use = []
result = []
for index, x in enumerate(deps):
if type(x) == types.ListType:
continue
elif x == "||": # Any-of.
result.extend(process_deps(deps[index + 1], use))
elif x[-1] == "?": # Use-conditional.
result.extend(process_deps(deps[index + 1], use + [x[:-1]]))
elif x[0] == "!": # Blocker.
result.append((portage.dep_getkey(x), True, use))
else:
result.append((portage.dep_getkey(x), False, use))
return result
if __name__ == "__main__":
parser = optparse.OptionParser()
parser.add_option("-i", "--input", dest="input_filename", default="package.keywords", help="Input filename for generated package.keywords file [default=%default]")
parser.add_option("-o", "--output", dest="output_filename", default="package.rdeps", help="Output filename for generated package.rdeps file [default=%default]")
parser.add_option("-l", "--limit", dest="limit", type="int", default=-1, help="Limit of reverse dependencies per package. Default is no limit.")
parser.add_option("-v", "--verbose", dest="verbose", action="store_true", default=False)
(options, args) = parser.parse_args()
if not options.input_filename:
parser.error("--input option is required")
if not options.output_filename:
parser.error("--output option is required")
if args:
parser.error("unrecognized command-line args")
reverse_deps = {}
for pkg in portage.portdb.cp_all():
deps = []
for match in portage.portdb.match(pkg):
deps.extend(process_deps(portage.dep.paren_reduce(portage.portdb.aux_get(match, ['DEPEND', 'RDEPEND', 'PDEPEND'])[0])))
for cp, blocker, use in deps:
if blocker:
continue
if cp not in reverse_deps:
reverse_deps[cp] = {}
if pkg not in reverse_deps[cp]:
reverse_deps[cp][pkg] = []
if use not in reverse_deps[cp][pkg]:
reverse_deps[cp][pkg].append(use)
with open(options.input_filename, "r") as input_file:
with open(options.output_filename, "w") as output_file:
for line in input_file:
if line == "\n" or line.startswith("#"):
continue
if not line.endswith("\n"):
line += "\n"
cpv = line[1:-1]
pn = portage.versions.pkgsplit(cpv)[0]
if pn in reverse_deps:
output_file.write("# Reverse dependencies for %s\n" % pn)
if options.limit == -1:
cps = reverse_deps[pn]
else:
cps = random.sample(reverse_deps[pn], min(options.limit, len(reverse_deps[pn])))
for cp in cps:
use_combinations = reverse_deps[pn][cp]
if use_combinations != [[]]:
output_file.write("# One of the following USE flag combinations is required:\n")
for use_combination in use_combinations:
output_file.write("#\t%s\n" % ",".join(use_combination))
output_file.write("%s\n" % cp)
elif options.verbose:
print 'No reverse dependencies for %s' % pn
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