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| Rev | Author | Line No. | Line |
|---|---|---|---|
| 545 | palkovsky | 1 | #!/usr/bin/env python |
| 2 | """ |
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| 3 | Kernel configuration script |
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| 4 | """ |
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| 5 | import sys |
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| 6 | import os |
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| 7 | import re |
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| 8 | |||
| 9 | INPUT = 'kernel.config' |
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| 10 | OUTPUT = 'Makefile.config' |
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| 11 | TMPOUTPUT = 'Makefile.config.tmp' |
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| 12 | |||
| 13 | class DefaultDialog: |
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| 14 | "Wrapper dialog that tries to return default values" |
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| 15 | def __init__(self, dlg): |
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| 16 | self.dlg = dlg |
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| 17 | |||
| 18 | def set_title(self,text): |
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| 19 | self.dlg.set_title(text) |
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| 20 | |||
| 21 | def yesno(self, text, default=None): |
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| 22 | if default is not None: |
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| 23 | return default |
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| 24 | return self.dlg.yesno(text, default) |
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| 25 | def noyes(self, text, default=None): |
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| 26 | if default is not None: |
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| 27 | return default |
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| 28 | return self.dlg.noyes(text, default) |
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| 29 | |||
| 30 | def choice(self, text, choices, defopt=None): |
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| 31 | if defopt is not None: |
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| 32 | return choices[defopt][0] |
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| 33 | return self.dlg.choice(text, choices, defopt) |
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| 34 | |||
| 35 | class NoDialog: |
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| 36 | def __init__(self): |
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| 37 | self.printed = None |
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| 38 | self.title = 'HelenOS Configuration' |
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| 39 | |||
| 40 | def print_title(self): |
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| 41 | if not self.printed: |
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| 552 | palkovsky | 42 | sys.stdout.write("\n*** %s ***\n" % self.title) |
| 545 | palkovsky | 43 | self.printed = True |
| 44 | |||
| 45 | def set_title(self, text): |
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| 46 | self.title = text |
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| 47 | self.printed = False |
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| 48 | |||
| 49 | def noyes(self, text, default=None): |
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| 50 | if not default: |
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| 51 | default = 'n' |
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| 52 | return self.yesno(text, default) |
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| 53 | |||
| 54 | def yesno(self, text, default=None): |
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| 55 | self.print_title() |
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| 56 | |||
| 57 | if default != 'n': |
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| 58 | default = 'y' |
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| 59 | while 1: |
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| 60 | sys.stdout.write("%s (y/n)[%s]: " % (text,default)) |
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| 61 | inp = sys.stdin.readline() |
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| 62 | if not inp: |
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| 63 | raise EOFError |
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| 64 | inp = inp.strip().lower() |
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| 65 | if not inp: |
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| 66 | return default |
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| 67 | if inp == 'y': |
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| 68 | return 'y' |
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| 69 | elif inp == 'n': |
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| 70 | return 'n' |
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| 71 | |||
| 72 | def _print_choice(self, text, choices, defopt): |
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| 73 | sys.stdout.write('%s:\n' % text) |
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| 74 | for i,(text,descr) in enumerate(choices): |
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| 75 | sys.stdout.write('\t%2d. %s\n' % (i, descr)) |
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| 76 | if defopt is not None: |
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| 77 | sys.stdout.write('Enter choice number[%d]: ' % defopt) |
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| 78 | else: |
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| 79 | sys.stdout.write('Enter choice number: ') |
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| 80 | |||
| 81 | def choice(self, text, choices, defopt=None): |
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| 82 | self.print_title() |
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| 83 | while 1: |
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| 84 | self._print_choice(text, choices, defopt) |
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| 85 | inp = sys.stdin.readline() |
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| 86 | if not inp: |
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| 87 | raise EOFError |
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| 88 | if not inp.strip(): |
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| 89 | if defopt is not None: |
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| 90 | return choices[defopt][0] |
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| 91 | continue |
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| 92 | try: |
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| 93 | number = int(inp.strip()) |
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| 94 | except ValueError: |
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| 95 | continue |
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| 96 | if number < 0 or number >= len(choices): |
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| 97 | continue |
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| 98 | return choices[number][0] |
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| 99 | |||
| 100 | |||
| 101 | class Dialog(NoDialog): |
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| 102 | def __init__(self): |
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| 103 | NoDialog.__init__(self) |
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| 104 | self.dlgcmd = os.environ.get('DIALOG','dialog') |
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| 105 | self.title = 'HelenOS Configuration' |
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| 106 | |||
| 107 | if os.system('%s --print-maxsize >/dev/null 2>&1' % self.dlgcmd) != 0: |
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| 108 | raise NotImplementedError |
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| 109 | |||
| 110 | def set_title(self,text): |
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| 111 | self.title = text |
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| 112 | |||
| 113 | def calldlg(self,*args,**kw): |
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| 549 | palkovsky | 114 | "Wrapper for calling 'dialog' program" |
| 545 | palkovsky | 115 | indesc, outdesc = os.pipe() |
| 116 | pid = os.fork() |
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| 117 | if not pid: |
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| 118 | os.close(2) |
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| 119 | os.dup(outdesc) |
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| 120 | os.close(indesc) |
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| 121 | |||
| 122 | dlgargs = [self.dlgcmd,'--title',self.title] |
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| 123 | for key,val in kw.items(): |
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| 124 | dlgargs.append('--'+key) |
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| 125 | dlgargs.append(val) |
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| 126 | dlgargs += args |
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| 127 | os.execlp(self.dlgcmd,*dlgargs) |
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| 128 | |||
| 129 | os.close(outdesc) |
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| 130 | errout = os.fdopen(indesc,'r') |
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| 131 | data = errout.read() |
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| 132 | errout.close() |
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| 133 | |||
| 134 | pid,status = os.wait() |
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| 135 | if not os.WIFEXITED(status): |
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| 136 | raise EOFError |
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| 137 | status = os.WEXITSTATUS(status) |
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| 138 | if status == 255: |
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| 139 | raise EOFError |
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| 140 | return status,data |
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| 141 | |||
| 142 | def yesno(self, text, default=None): |
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| 143 | text = text + ':' |
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| 144 | width = '50' |
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| 145 | height = '5' |
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| 146 | if len(text) < 48: |
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| 147 | text = ' '*int(((48-len(text))/2)) + text |
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| 148 | else: |
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| 149 | width = '0' |
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| 150 | height = '0' |
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| 151 | if default == 'n': |
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| 152 | res,data = self.calldlg('--defaultno','--yesno',text,height,width) |
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| 153 | else: |
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| 154 | res,data = self.calldlg('--yesno',text,height,width) |
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| 155 | |||
| 156 | if res == 0: |
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| 157 | return 'y' |
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| 158 | return 'n' |
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| 159 | |||
| 160 | def choice(self, text, choices, defopt=None): |
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| 161 | text = text + ':' |
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| 162 | width = '50' |
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| 163 | height = str(8 + len(choices)) |
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| 164 | args = [] |
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| 165 | for key,val in choices: |
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| 166 | args.append(key) |
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| 167 | args.append(val) |
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| 168 | |||
| 169 | kw = {} |
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| 170 | if defopt: |
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| 171 | kw['default-item'] = choices[defopt][0] |
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| 172 | res,data = self.calldlg('--nocancel','--menu',text,height,width, |
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| 173 | str(len(choices)),*args, **kw) |
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| 174 | if res: |
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| 175 | print data |
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| 176 | raise EOFError |
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| 177 | return data |
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| 178 | |||
| 547 | palkovsky | 179 | def read_defaults(fname,defaults): |
| 549 | palkovsky | 180 | "Read saved values from last configuration run" |
| 545 | palkovsky | 181 | f = file(fname,'r') |
| 182 | for line in f: |
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| 547 | palkovsky | 183 | res = re.match(r'^(?:#!# )?([^#]\w*)\s*=\s*(.*?)\s*$', line) |
| 545 | palkovsky | 184 | if res: |
| 185 | defaults[res.group(1)] = res.group(2) |
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| 186 | f.close() |
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| 187 | |||
| 547 | palkovsky | 188 | def check_condition(text, defaults): |
| 550 | palkovsky | 189 | result = True |
| 190 | conds = text.split('&') |
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| 191 | for cond in conds: |
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| 192 | if cond.startswith('(') and cond.endswith(')'): |
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| 193 | cond = cond[1:-1] |
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| 194 | if not check_dnf(cond, defaults): |
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| 195 | return False |
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| 196 | return True |
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| 197 | |||
| 198 | def check_dnf(text, defaults): |
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| 199 | """ |
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| 200 | Check that the condition specified on input line is True |
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| 201 | |||
| 202 | only CNF is supported |
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| 203 | """ |
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| 547 | palkovsky | 204 | conds = text.split('|') |
| 205 | for cond in conds: |
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| 550 | palkovsky | 206 | res = re.match(r'^(.*?)(!?=)(.*)$', cond) |
| 207 | if not res: |
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| 208 | raise RuntimeError("Invalid condition: %s" % cond) |
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| 209 | condname = res.group(1) |
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| 210 | oper = res.group(2) |
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| 211 | condval = res.group(3) |
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| 547 | palkovsky | 212 | if not defaults.has_key(condname): |
| 213 | raise RuntimeError("Condition var %s does not exist: %s" % \ |
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| 550 | palkovsky | 214 | (condname,text)) |
| 215 | |||
| 216 | if oper=='=' and condval == defaults[condname]: |
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| 547 | palkovsky | 217 | return True |
| 550 | palkovsky | 218 | if oper == '!=' and condval != defaults[condname]: |
| 547 | palkovsky | 219 | return True |
| 220 | return False |
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| 221 | |||
| 545 | palkovsky | 222 | def parse_config(input, output, dlg, defaults={}): |
| 549 | palkovsky | 223 | "Parse configuration file and create Makefile.config on the fly" |
| 545 | palkovsky | 224 | f = file(input, 'r') |
| 225 | outf = file(output, 'w') |
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| 226 | |||
| 227 | outf.write('#########################################\n') |
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| 228 | outf.write('## AUTO-GENERATED FILE, DO NOT EDIT!!! ##\n') |
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| 229 | outf.write('#########################################\n\n') |
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| 230 | |||
| 231 | comment = '' |
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| 232 | default = None |
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| 233 | choices = [] |
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| 550 | palkovsky | 234 | for line in f: |
| 235 | if line.startswith('%'): |
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| 236 | res = re.match(r'^%\s*(?:\[(.*?)\])?\s*(.*)$', line) |
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| 237 | if not res: |
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| 238 | raise RuntimeError('Invalid command: %s' % line) |
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| 239 | if res.group(1): |
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| 240 | if not check_condition(res.group(1), defaults): |
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| 241 | continue |
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| 242 | args = res.group(2).strip().split(' ') |
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| 243 | cmd = args[0].lower() |
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| 244 | args = args[1:] |
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| 245 | if cmd == 'askdefault': |
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| 246 | if isinstance(dlg, DefaultDialog): |
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| 247 | continue |
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| 248 | res = dlg.noyes('Change kernel configuration') |
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| 249 | if res == 'n': |
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| 250 | dlg = DefaultDialog(dlg) |
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| 251 | elif cmd == 'saveas': |
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| 252 | outf.write('%s = %s\n' % (args[1],defaults[args[0]])) |
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| 253 | |||
| 254 | continue |
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| 255 | |||
| 545 | palkovsky | 256 | if line.startswith('!'): |
| 549 | palkovsky | 257 | # Ask a question |
| 547 | palkovsky | 258 | res = re.search(r'!\s*(?:\[(.*?)\])?\s*([^\s]+)\s*\((.*)\)\s*$', line) |
| 545 | palkovsky | 259 | if not res: |
| 260 | raise RuntimeError("Weird line: %s" % line) |
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| 547 | palkovsky | 261 | varname = res.group(2) |
| 262 | vartype = res.group(3) |
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| 545 | palkovsky | 263 | |
| 264 | default = defaults.get(varname,None) |
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| 265 | |||
| 547 | palkovsky | 266 | if res.group(1): |
| 267 | if not check_condition(res.group(1), defaults): |
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| 268 | if default is not None: |
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| 269 | outf.write('#!# %s = %s\n' % (varname, default)) |
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| 550 | palkovsky | 270 | # Clear cumulated values |
| 271 | comment = '' |
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| 272 | default = None |
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| 273 | choices = [] |
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| 547 | palkovsky | 274 | continue |
| 275 | |||
| 545 | palkovsky | 276 | if vartype == 'y/n': |
| 277 | result = dlg.yesno(comment, default) |
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| 278 | elif vartype == 'n/y': |
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| 279 | result = dlg.noyes(comment, default) |
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| 280 | elif vartype == 'choice': |
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| 281 | defopt = None |
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| 282 | if default is not None: |
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| 283 | for i,(key,val) in enumerate(choices): |
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| 284 | if key == default: |
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| 285 | defopt = i |
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| 286 | break |
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| 287 | result = dlg.choice(comment, choices, defopt) |
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| 288 | else: |
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| 289 | raise RuntimeError("Bad method: %s" % vartype) |
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| 290 | outf.write('%s = %s\n' % (varname, result)) |
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| 547 | palkovsky | 291 | # Remeber the selected value |
| 292 | defaults[varname] = result |
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| 545 | palkovsky | 293 | # Clear cumulated values |
| 294 | comment = '' |
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| 295 | default = None |
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| 296 | choices = [] |
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| 297 | continue |
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| 298 | |||
| 299 | if line.startswith('@'): |
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| 549 | palkovsky | 300 | # Add new line into the 'choice array' |
| 547 | palkovsky | 301 | res = re.match(r'@\s*(?:\[(.*?)\])?\s*"(.*?)"\s*(.*)$', line) |
| 545 | palkovsky | 302 | if not res: |
| 303 | raise RuntimeError("Bad line: %s" % line) |
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| 547 | palkovsky | 304 | if res.group(1): |
| 305 | if not check_condition(res.group(1),defaults): |
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| 306 | continue |
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| 307 | choices.append((res.group(2), res.group(3))) |
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| 545 | palkovsky | 308 | continue |
| 549 | palkovsky | 309 | |
| 310 | # All other things print to output file |
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| 545 | palkovsky | 311 | outf.write(line) |
| 312 | if re.match(r'^#[^#]', line): |
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| 549 | palkovsky | 313 | # Last comment before question will be displayed to the user |
| 545 | palkovsky | 314 | comment = line[1:].strip() |
| 552 | palkovsky | 315 | elif line.startswith('## '): |
| 549 | palkovsky | 316 | # Set title of the dialog window |
| 545 | palkovsky | 317 | dlg.set_title(line[2:].strip()) |
| 318 | |||
| 319 | outf.close() |
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| 320 | f.close() |
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| 321 | |||
| 322 | def main(): |
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| 550 | palkovsky | 323 | defaults = {} |
| 545 | palkovsky | 324 | try: |
| 325 | dlg = Dialog() |
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| 326 | except NotImplementedError: |
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| 327 | dlg = NoDialog() |
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| 328 | |||
| 329 | # Default run will update the configuration file |
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| 330 | # with newest options |
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| 550 | palkovsky | 331 | if len(sys.argv) == 2 and sys.argv[1]=='default': |
| 545 | palkovsky | 332 | dlg = DefaultDialog(dlg) |
| 333 | |||
| 334 | if os.path.exists(OUTPUT): |
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| 547 | palkovsky | 335 | read_defaults(OUTPUT, defaults) |
| 545 | palkovsky | 336 | |
| 337 | parse_config(INPUT, TMPOUTPUT, dlg, defaults) |
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| 338 | if os.path.exists(OUTPUT): |
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| 339 | os.unlink(OUTPUT) |
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| 340 | os.rename(TMPOUTPUT, OUTPUT) |
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| 341 | |||
| 342 | |||
| 343 | if __name__ == '__main__': |
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| 344 | main() |