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import os
import sys
import tempfile
import subprocess
import time
import utils
from conf import conf
from conf import sf
import exceptions
def generate():
"""Collect boolean equations from files: rules, solved and required
And get solution with picosat
"""
# Check if rules_file exist. If it was generated.
if not os.path.isfile(sf(conf.rules_file)):
raise exceptions.MissingFile(conf.rules_file,"Run parse_kconfig.")
if os.path.isfile(sf(conf.solution_file)):
raise exceptions.SolutionGenerated()
w_file = tempfile.NamedTemporaryFile(delete=False)
# Join files to one single temporary file
lines = set()
with open(sf(conf.rules_file), 'r') as f:
for lnn in open(sf(conf.rules_file), 'r'):
ln = lnn.rstrip()
if ln not in lines:
lines.add(ln)
if os.path.isfile(sf(conf.required_file)):
for lnn in open(sf(conf.required_file), 'r'):
ln = lnn.rstrip()
if ln not in lines:
lines.add(ln)
with open(sf(conf.variable_count_file)) as f:
var_num = f.readline()
lines_count = len(lines)
first_line = "p cnf " + var_num + " " + str(lines_count)
w_file.write(bytes(first_line + '\n', 'UTF-8'))
for ln in lines:
w_file.write(bytes(ln + ' 0\n', 'UTF-8'))
w_file.close()
# Execute picosat
try:
os.mkdir(sf(conf.log_folder))
except OSError:
pass
picosat_cmd = [sf(conf.picosat), w_file.name]
picosat_cmd += conf.picosat_args
satprc = subprocess.Popen(picosat_cmd, stdout = subprocess.PIPE)
with open(os.path.join(sf(conf.log_folder), "picosat.log"), 'a') as f:
f.write("::" + time.strftime("%y-%m-%d-%H-%M-%S") + "::\n")
solut = []
for linen in satprc.stdout:
line = linen.decode(sys.getdefaultencoding())
f.write(line)
if conf.picosat_output:
print(line, end="")
if line[0] == 's':
try:
solut.remove(0)
with open(sf(conf.config_map_file), 'a') as fm:
fm.write(str(utils.hash_config(solut)) + ':')
for sl in solut:
fm.write(str(sl) + ' ')
fm.write('\n')
except ValueError:
pass
solut = []
if not line.rstrip() == 's SATISFIABLE':
os.remove(w_file.name)
raise exceptions.NoSolution()
elif line[0] == 'v':
for sl in line[2:].split():
solut.append(int(sl))
os.remove(w_file.name)
def apply():
"""Apply generated solution to kernel source.
"""
utils.build_symbol_map() # Ensure smap existence
solved = set()
solution = []
# Load set of solved solutions
if os.path.isfile(sf(conf.config_solved_file)):
with open(sf(conf.config_solved_file)) as f:
for ln in f:
solved.add(ln.strip())
# Load one solution if it is not in solved
hash = ''
with open(sf(conf.config_map_file)) as f:
while True:
w = f.readline().split(sep=':')
if not w[0]:
break
if not w[0] in solved:
solution = utils.config_strtoint(w[1], True)
hash = w[0]
break
if not solution:
raise exceptions.NoApplicableSolution()
# Write hash to config_solved
with open(sf(conf.config_solved_file), 'a') as f:
f.write(hash)
f.write('\n')
# Load variable count
with open(sf(conf.symbol_map_file)) as f:
for var_num, l in enumerate(f):
pass
var_num += 1
# Write solution to .config file in linux source folder
with open(sf(conf.linux_dot_config), 'w') as f:
for s in solution:
if s < 0:
nt = True
s *= -1
else:
nt = False
if s >= var_num:
break;
if 'NONAMEGEN' in utils.smap[s]: # ignore generated names
continue
f.write('CONFIG_' + utils.smap[s] + '=')
if not nt:
f.write('y')
else:
f.write('n')
f.write('\n')
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