source: mainline/tools/config.py@ 9371c30

lfn serial ticket/834-toolchain-update topic/msim-upgrade topic/simplify-dev-export
Last change on this file since 9371c30 was 9371c30, checked in by Ondrej Palkovsky <ondrap@…>, 20 years ago

Completely reworked configuration system.

  • Property mode set to 100755
File size: 10.5 KB
Line 
1#!/usr/bin/env python
2"""
3Kernel configuration script
4"""
5import sys
6import os
7import re
8
9INPUT = 'kernel.config'
10OUTPUT = 'Makefile.config'
11TMPOUTPUT = 'Makefile.config.tmp'
12
13class DefaultDialog:
14 "Wrapper dialog that tries to return default values"
15 def __init__(self, dlg):
16 self.dlg = dlg
17
18 def set_title(self,text):
19 self.dlg.set_title(text)
20
21 def yesno(self, text, default=None):
22 if default is not None:
23 return default
24 return self.dlg.yesno(text, default)
25 def noyes(self, text, default=None):
26 if default is not None:
27 return default
28 return self.dlg.noyes(text, default)
29
30 def choice(self, text, choices, defopt=None):
31 if defopt is not None:
32 return choices[defopt][0]
33 return self.dlg.choice(text, choices, defopt)
34
35class NoDialog:
36 def __init__(self):
37 self.printed = None
38 self.title = 'HelenOS Configuration'
39
40 def print_title(self):
41 if not self.printed:
42 sys.stdout.write("*** %s ***\n" % self.title)
43 self.printed = True
44
45 def set_title(self, text):
46 self.title = text
47 self.printed = False
48
49 def noyes(self, text, default=None):
50 if not default:
51 default = 'n'
52 return self.yesno(text, default)
53
54 def yesno(self, text, default=None):
55 self.print_title()
56
57 if default != 'n':
58 default = 'y'
59 while 1:
60 sys.stdout.write("%s (y/n)[%s]: " % (text,default))
61 inp = sys.stdin.readline()
62 if not inp:
63 raise EOFError
64 inp = inp.strip().lower()
65 if not inp:
66 return default
67 if inp == 'y':
68 return 'y'
69 elif inp == 'n':
70 return 'n'
71
72 def _print_choice(self, text, choices, defopt):
73 sys.stdout.write('%s:\n' % text)
74 for i,(text,descr) in enumerate(choices):
75 sys.stdout.write('\t%2d. %s\n' % (i, descr))
76 if defopt is not None:
77 sys.stdout.write('Enter choice number[%d]: ' % defopt)
78 else:
79 sys.stdout.write('Enter choice number: ')
80
81 def choice(self, text, choices, defopt=None):
82 self.print_title()
83 while 1:
84 self._print_choice(text, choices, defopt)
85 inp = sys.stdin.readline()
86 if not inp:
87 raise EOFError
88 if not inp.strip():
89 if defopt is not None:
90 return choices[defopt][0]
91 continue
92 try:
93 number = int(inp.strip())
94 except ValueError:
95 continue
96 if number < 0 or number >= len(choices):
97 continue
98 return choices[number][0]
99
100
101class Dialog(NoDialog):
102 def __init__(self):
103 NoDialog.__init__(self)
104 self.dlgcmd = os.environ.get('DIALOG','dialog')
105 self.title = 'HelenOS Configuration'
106
107 if os.system('%s --print-maxsize >/dev/null 2>&1' % self.dlgcmd) != 0:
108 raise NotImplementedError
109
110 def set_title(self,text):
111 self.title = text
112
113 def calldlg(self,*args,**kw):
114 "Wrapper for calling 'dialog' program"
115 indesc, outdesc = os.pipe()
116 pid = os.fork()
117 if not pid:
118 os.close(2)
119 os.dup(outdesc)
120 os.close(indesc)
121
122 dlgargs = [self.dlgcmd,'--title',self.title]
123 for key,val in kw.items():
124 dlgargs.append('--'+key)
125 dlgargs.append(val)
126 dlgargs += args
127 os.execlp(self.dlgcmd,*dlgargs)
128
129 os.close(outdesc)
130 errout = os.fdopen(indesc,'r')
131 data = errout.read()
132 errout.close()
133
134 pid,status = os.wait()
135 if not os.WIFEXITED(status):
136 raise EOFError
137 status = os.WEXITSTATUS(status)
138 if status == 255:
139 raise EOFError
140 return status,data
141
142 def yesno(self, text, default=None):
143 text = text + ':'
144 width = '50'
145 height = '5'
146 if len(text) < 48:
147 text = ' '*int(((48-len(text))/2)) + text
148 else:
149 width = '0'
150 height = '0'
151 if default == 'n':
152 res,data = self.calldlg('--defaultno','--yesno',text,height,width)
153 else:
154 res,data = self.calldlg('--yesno',text,height,width)
155
156 if res == 0:
157 return 'y'
158 return 'n'
159
160 def choice(self, text, choices, defopt=None):
161 text = text + ':'
162 width = '50'
163 height = str(8 + len(choices))
164 args = []
165 for key,val in choices:
166 args.append(key)
167 args.append(val)
168
169 kw = {}
170 if defopt:
171 kw['default-item'] = choices[defopt][0]
172 res,data = self.calldlg('--nocancel','--menu',text,height,width,
173 str(len(choices)),*args, **kw)
174 if res:
175 print data
176 raise EOFError
177 return data
178
179def read_defaults(fname,defaults):
180 "Read saved values from last configuration run"
181 f = file(fname,'r')
182 for line in f:
183 res = re.match(r'^(?:#!# )?([^#]\w*)\s*=\s*(.*?)\s*$', line)
184 if res:
185 defaults[res.group(1)] = res.group(2)
186 f.close()
187
188def check_condition(text, defaults):
189 result = True
190 conds = text.split('&')
191 for cond in conds:
192 if cond.startswith('(') and cond.endswith(')'):
193 cond = cond[1:-1]
194 if not check_dnf(cond, defaults):
195 return False
196 return True
197
198def check_dnf(text, defaults):
199 """
200 Check that the condition specified on input line is True
201
202 only CNF is supported
203 """
204 conds = text.split('|')
205 for cond in conds:
206 res = re.match(r'^(.*?)(!?=)(.*)$', cond)
207 if not res:
208 raise RuntimeError("Invalid condition: %s" % cond)
209 condname = res.group(1)
210 oper = res.group(2)
211 condval = res.group(3)
212 if not defaults.has_key(condname):
213 raise RuntimeError("Condition var %s does not exist: %s" % \
214 (condname,text))
215
216 if oper=='=' and condval == defaults[condname]:
217 return True
218 if oper == '!=' and condval != defaults[condname]:
219 return True
220 return False
221
222def parse_config(input, output, dlg, defaults={}):
223 "Parse configuration file and create Makefile.config on the fly"
224 f = file(input, 'r')
225 outf = file(output, 'w')
226
227 outf.write('#########################################\n')
228 outf.write('## AUTO-GENERATED FILE, DO NOT EDIT!!! ##\n')
229 outf.write('#########################################\n\n')
230
231 comment = ''
232 default = None
233 choices = []
234 for line in f:
235 if line.startswith('%'):
236 res = re.match(r'^%\s*(?:\[(.*?)\])?\s*(.*)$', line)
237 if not res:
238 raise RuntimeError('Invalid command: %s' % line)
239 if res.group(1):
240 if not check_condition(res.group(1), defaults):
241 continue
242 args = res.group(2).strip().split(' ')
243 cmd = args[0].lower()
244 args = args[1:]
245 if cmd == 'askdefault':
246 if isinstance(dlg, DefaultDialog):
247 continue
248 res = dlg.noyes('Change kernel configuration')
249 if res == 'n':
250 dlg = DefaultDialog(dlg)
251 elif cmd == 'saveas':
252 outf.write('%s = %s\n' % (args[1],defaults[args[0]]))
253
254 continue
255
256 if line.startswith('!'):
257 # Ask a question
258 res = re.search(r'!\s*(?:\[(.*?)\])?\s*([^\s]+)\s*\((.*)\)\s*$', line)
259 if not res:
260 raise RuntimeError("Weird line: %s" % line)
261 varname = res.group(2)
262 vartype = res.group(3)
263
264 default = defaults.get(varname,None)
265
266 if res.group(1):
267 if not check_condition(res.group(1), defaults):
268 if default is not None:
269 outf.write('#!# %s = %s\n' % (varname, default))
270 # Clear cumulated values
271 comment = ''
272 default = None
273 choices = []
274 continue
275
276 if vartype == 'y/n':
277 result = dlg.yesno(comment, default)
278 elif vartype == 'n/y':
279 result = dlg.noyes(comment, default)
280 elif vartype == 'choice':
281 defopt = None
282 if default is not None:
283 for i,(key,val) in enumerate(choices):
284 if key == default:
285 defopt = i
286 break
287 result = dlg.choice(comment, choices, defopt)
288 else:
289 raise RuntimeError("Bad method: %s" % vartype)
290 outf.write('%s = %s\n' % (varname, result))
291 # Remeber the selected value
292 defaults[varname] = result
293 # Clear cumulated values
294 comment = ''
295 default = None
296 choices = []
297 continue
298
299 if line.startswith('@'):
300 # Add new line into the 'choice array'
301 res = re.match(r'@\s*(?:\[(.*?)\])?\s*"(.*?)"\s*(.*)$', line)
302 if not res:
303 raise RuntimeError("Bad line: %s" % line)
304 if res.group(1):
305 if not check_condition(res.group(1),defaults):
306 continue
307 choices.append((res.group(2), res.group(3)))
308 continue
309
310 # All other things print to output file
311 outf.write(line)
312 if re.match(r'^#[^#]', line):
313 # Last comment before question will be displayed to the user
314 comment = line[1:].strip()
315 elif line.startswith('##'):
316 # Set title of the dialog window
317 dlg.set_title(line[2:].strip())
318
319 outf.close()
320 f.close()
321
322def main():
323 defaults = {}
324 try:
325 dlg = Dialog()
326 except NotImplementedError:
327 dlg = NoDialog()
328
329 # Default run will update the configuration file
330 # with newest options
331 if len(sys.argv) == 2 and sys.argv[1]=='default':
332 dlg = DefaultDialog(dlg)
333
334 if os.path.exists(OUTPUT):
335 read_defaults(OUTPUT, defaults)
336
337 parse_config(INPUT, TMPOUTPUT, dlg, defaults)
338 if os.path.exists(OUTPUT):
339 os.unlink(OUTPUT)
340 os.rename(TMPOUTPUT, OUTPUT)
341
342
343if __name__ == '__main__':
344 main()
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