#!/usr/bin/env python
"""
Kernel configuration script
"""
import sys
import os
import re
INPUT = 'kernel.config'
OUTPUT = 'Makefile.config'
TMPOUTPUT = 'Makefile.config.tmp'
class DefaultDialog:
"Wrapper dialog that tries to return default values"
def __init__(self, dlg):
self.dlg = dlg
def set_title(self,text):
self.dlg.set_title(text)
def yesno(self, text, default=None):
if default is not None:
return default
return self.dlg.yesno(text, default)
def noyes(self, text, default=None):
if default is not None:
return default
return self.dlg.noyes(text, default)
def choice(self, text, choices, defopt=None):
if defopt is not None:
return choices[defopt][0]
return self.dlg.choice(text, choices, defopt)
class NoDialog:
def __init__(self):
self.printed = None
self.title = 'HelenOS Configuration'
def print_title(self):
if not self.printed:
sys.stdout.write("*** %s ***\n" % self.title)
self.printed = True
def set_title(self, text):
self.title = text
self.printed = False
def noyes(self, text, default=None):
if not default:
default = 'n'
return self.yesno(text, default)
def yesno(self, text, default=None):
self.print_title()
if default != 'n':
default = 'y'
while 1:
sys.stdout.write("%s (y/n)[%s]: " % (text,default))
inp = sys.stdin.readline()
if not inp:
raise EOFError
inp = inp.strip().lower()
if not inp:
return default
if inp == 'y':
return 'y'
elif inp == 'n':
return 'n'
def _print_choice(self, text, choices, defopt):
sys.stdout.write('%s:\n' % text)
for i,(text,descr) in enumerate(choices):
sys.stdout.write('\t%2d. %s\n' % (i, descr))
if defopt is not None:
sys.stdout.write('Enter choice number[%d]: ' % defopt)
else:
sys.stdout.write('Enter choice number: ')
def choice(self, text, choices, defopt=None):
self.print_title()
while 1:
self._print_choice(text, choices, defopt)
inp = sys.stdin.readline()
if not inp:
raise EOFError
if not inp.strip():
if defopt is not None:
return choices[defopt][0]
continue
try:
number = int(inp.strip())
except ValueError:
continue
if number < 0 or number >= len(choices):
continue
return choices[number][0]
class Dialog(NoDialog):
def __init__(self):
NoDialog.__init__(self)
self.dlgcmd = os.environ.get('DIALOG','dialog')
self.title = 'HelenOS Configuration'
if os.system('%s --print-maxsize >/dev/null 2>&1' % self.dlgcmd) != 0:
raise NotImplementedError
def set_title(self,text):
self.title = text
def calldlg(self,*args,**kw):
indesc, outdesc = os.pipe()
pid = os.fork()
if not pid:
os.close(2)
os.dup(outdesc)
os.close(indesc)
dlgargs = [self.dlgcmd,'--title',self.title]
for key,val in kw.items():
dlgargs.append('--'+key)
dlgargs.append(val)
dlgargs += args
os.execlp(self.dlgcmd,*dlgargs)
os.close(outdesc)
errout = os.fdopen(indesc,'r')
data = errout.read()
errout.close()
pid,status = os.wait()
if not os.WIFEXITED(status):
raise EOFError
status = os.WEXITSTATUS(status)
if status == 255:
raise EOFError
return status,data
def yesno(self, text, default=None):
text = text + ':'
width = '50'
height = '5'
if len(text) < 48:
text = ' '*int(((48-len(text))/2)) + text
else:
width = '0'
height = '0'
if default == 'n':
res,data = self.calldlg('--defaultno','--yesno',text,height,width)
else:
res,data = self.calldlg('--yesno',text,height,width)
if res == 0:
return 'y'
return 'n'
def choice(self, text, choices, defopt=None):
text = text + ':'
width = '50'
height = str(8 + len(choices))
args = []
for key,val in choices:
args.append(key)
args.append(val)
kw = {}
if defopt:
kw['default-item'] = choices[defopt][0]
res,data = self.calldlg('--nocancel','--menu',text,height,width,
str(len(choices)),*args, **kw)
if res:
print data
raise EOFError
return data
def read_defaults(fname):
defaults = {}
f = file(fname,'r')
for line in f:
res = re.match(r'^([^#]\w*)\s*=\s*(.*?)\s*$', line)
if res:
defaults[res.group(1)] = res.group(2)
f.close()
return defaults
def parse_config(input, output, dlg, defaults={}):
f = file(input, 'r')
outf = file(output, 'w')
outf.write('#########################################\n')
outf.write('## AUTO-GENERATED FILE, DO NOT EDIT!!! ##\n')
outf.write('#########################################\n\n')
comment = ''
default = None
choices = []
for line in f:
if line.startswith('!'):
res = re.search(r'!\s*([^\s]+)\s*\((.*)\)\s*$', line)
if not res:
raise RuntimeError("Weird line: %s" % line)
varname = res.group(1)
vartype = res.group(2)
default = defaults.get(varname,None)
if vartype == 'y/n':
result = dlg.yesno(comment, default)
elif vartype == 'n/y':
result = dlg.noyes(comment, default)
elif vartype == 'choice':
defopt = None
if default is not None:
for i,(key,val) in enumerate(choices):
if key == default:
defopt = i
break
result = dlg.choice(comment, choices, defopt)
else:
raise RuntimeError("Bad method: %s" % vartype)
outf.write('%s = %s\n' % (varname, result))
# Clear cumulated values
comment = ''
default = None
choices = []
continue
if line.startswith('@'):
res = re.match(r'@\s*"(.*?)"\s*(.*)$', line)
if not res:
raise RuntimeError("Bad line: %s" % line)
choices.append((res.group(1), res.group(2)))
continue
outf.write(line)
if re.match(r'^#[^#]', line):
comment = line[1:].strip()
elif line.startswith('##'):
dlg.set_title(line[2:].strip())
outf.close()
f.close()
def main():
defaults = {}
try:
dlg = Dialog()
except NotImplementedError:
dlg = NoDialog()
# Default run will update the configuration file
# with newest options
if len(sys.argv) == 2 and sys.argv[1]=='default':
dlg = DefaultDialog(dlg)
if os.path.exists(OUTPUT):
defaults = read_defaults(OUTPUT)
parse_config(INPUT, TMPOUTPUT, dlg, defaults)
if os.path.exists(OUTPUT):
os.unlink(OUTPUT)
os.rename(TMPOUTPUT, OUTPUT)
if __name__ == '__main__':
main()