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#!/usr/bin/env python3
#
# Copyright (C) 2018 Wind River Systems, Inc.
#
# SPDX-License-Identifier: GPL-2.0-only
#
import os
import sys
import argparse
import logging
import re
class Dot(object):
def __init__(self):
parser = argparse.ArgumentParser(
description="Analyse recipe-depends.dot generated by bitbake -g",
epilog="Use %(prog)s --help to get help")
parser.add_argument("dotfile",
help = "Specify the dotfile", nargs = 1, action='store', default='')
parser.add_argument("-k", "--key",
help = "Specify the key, e.g., recipe name",
action="store", default='')
parser.add_argument("-d", "--depends",
help = "Print the key's dependencies",
action="store_true", default=False)
parser.add_argument("-w", "--why",
help = "Print why the key is built",
action="store_true", default=False)
parser.add_argument("-r", "--remove",
help = "Remove duplicated dependencies to reduce the size of the dot files."
" For example, A->B, B->C, A->C, then A->C can be removed.",
action="store_true", default=False)
self.args = parser.parse_args()
if len(sys.argv) != 3 and len(sys.argv) < 5:
print('ERROR: Not enough args, see --help for usage')
@staticmethod
def insert_dep_chain(chain, rdeps, alldeps):
"""
insert elements to chain from rdeps, according to alldeps
"""
# chain should at least contain one element
if len(chain) == 0:
raise
inserted_elements = []
for rdep in rdeps:
if rdep in chain:
continue
else:
for i in range(0, len(chain)-1):
if chain[i] in alldeps[rdep] and rdep in alldeps[chain[i+1]]:
chain.insert(i+1, rdep)
inserted_elements.append(rdep)
break
if chain[-1] in alldeps[rdep] and rdep not in chain:
chain.append(rdep)
inserted_elements.append(rdep)
return inserted_elements
@staticmethod
def print_dep_chains(key, rdeps, alldeps):
rlist = rdeps.copy()
chain = []
removed_rdeps = [] # hold rdeps removed from rlist
chain.append(key)
while (len(rlist) != 0):
# insert chain from rlist
inserted_elements = Dot.insert_dep_chain(chain, rlist, alldeps)
if not inserted_elements:
if chain[-1] in rlist:
rlist.remove(chain[-1])
removed_rdeps.append(chain[-1])
chain.pop()
continue
else:
# insert chain from removed_rdeps
Dot.insert_dep_chain(chain, removed_rdeps, alldeps)
print(' -> '.join(list(reversed(chain))))
def main(self):
#print(self.args.dotfile[0])
# The format is {key: depends}
depends = {}
with open(self.args.dotfile[0], 'r') as f:
for line in f.readlines():
if ' -> ' not in line:
continue
line_no_quotes = line.replace('"', '')
m = re.match("(.*) -> (.*)", line_no_quotes)
if not m:
print('WARNING: Found unexpected line: %s' % line)
continue
key = m.group(1)
if key == "meta-world-pkgdata":
continue
dep = m.group(2)
if key in depends:
if not key in depends[key]:
depends[key].add(dep)
else:
print('WARNING: Fonud duplicated line: %s' % line)
else:
depends[key] = set()
depends[key].add(dep)
if self.args.remove:
reduced_depends = {}
for k, deps in depends.items():
child_deps = set()
added = set()
# Both direct and indirect depends are already in the dict, so
# we don't have to do this recursively.
for dep in deps:
if dep in depends:
child_deps |= depends[dep]
reduced_depends[k] = deps - child_deps
outfile= '%s-reduced%s' % (self.args.dotfile[0][:-4], self.args.dotfile[0][-4:])
with open(outfile, 'w') as f:
print('Saving reduced dot file to %s' % outfile)
f.write('digraph depends {\n')
for k, v in reduced_depends.items():
for dep in v:
f.write('"%s" -> "%s"\n' % (k, dep))
f.write('}\n')
sys.exit(0)
if self.args.key not in depends:
print("ERROR: Can't find key %s in %s" % (self.args.key, self.args.dotfile[0]))
sys.exit(1)
if self.args.depends:
if self.args.key in depends:
print('Depends: %s' % ' '.join(depends[self.args.key]))
reverse_deps = []
if self.args.why:
for k, v in depends.items():
if self.args.key in v and not k in reverse_deps:
reverse_deps.append(k)
print('Because: %s' % ' '.join(reverse_deps))
Dot.print_dep_chains(self.args.key, reverse_deps, depends)
if __name__ == "__main__":
try:
dot = Dot()
ret = dot.main()
except Exception as esc:
ret = 1
import traceback
traceback.print_exc()
sys.exit(ret)
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