1 | #!/usr/bin/env python
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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 |
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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 |
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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 |
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18 | def set_title(self,text):
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19 | self.dlg.set_title(text)
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20 |
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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 |
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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 |
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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 |
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40 | def print_title(self):
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41 | if not self.printed:
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42 | sys.stdout.write("*** %s ***\n" % self.title)
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43 | self.printed = True
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44 |
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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 |
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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 |
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54 | def yesno(self, text, default=None):
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55 | self.print_title()
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56 |
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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 |
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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 |
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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 |
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100 |
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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 |
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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 |
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110 | def set_title(self,text):
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111 | self.title = text
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112 |
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113 | def calldlg(self,*args,**kw):
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114 | "Wrapper for calling 'dialog' program"
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115 | indesc, outdesc = os.pipe()
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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 |
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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 |
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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 |
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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 |
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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 |
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156 | if res == 0:
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157 | return 'y'
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158 | return 'n'
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159 |
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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 |
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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 |
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179 | def read_defaults(fname,defaults):
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180 | "Read saved values from last configuration run"
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181 | f = file(fname,'r')
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182 | for line in f:
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183 | res = re.match(r'^(?:#!# )?([^#]\w*)\s*=\s*(.*?)\s*$', line)
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184 | if res:
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185 | defaults[res.group(1)] = res.group(2)
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186 | f.close()
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187 |
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188 | def check_condition(text, defaults):
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189 | "Check that the condition specified on input line is True"
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190 | result = False
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191 | conds = text.split('|')
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192 | for cond in conds:
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193 | condname,condval = cond.split('=')
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194 | if not defaults.has_key(condname):
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195 | raise RuntimeError("Condition var %s does not exist: %s" % \
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196 | (condname,line))
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197 | # None means wildcard
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198 | if defaults[condname] is None:
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199 | return True
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200 | if condval == defaults[condname]:
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201 | return True
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202 | return False
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203 |
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204 | def parse_config(input, output, dlg, defaults={}):
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205 | "Parse configuration file and create Makefile.config on the fly"
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206 | f = file(input, 'r')
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207 | outf = file(output, 'w')
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208 |
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209 | outf.write('#########################################\n')
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210 | outf.write('## AUTO-GENERATED FILE, DO NOT EDIT!!! ##\n')
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211 | outf.write('#########################################\n\n')
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212 |
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213 | comment = ''
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214 | default = None
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215 | choices = []
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216 | for line in f:
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217 | if line.startswith('!'):
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218 | # Ask a question
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219 | res = re.search(r'!\s*(?:\[(.*?)\])?\s*([^\s]+)\s*\((.*)\)\s*$', line)
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220 | if not res:
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221 | raise RuntimeError("Weird line: %s" % line)
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222 | varname = res.group(2)
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223 | vartype = res.group(3)
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224 |
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225 | default = defaults.get(varname,None)
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226 |
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227 | if res.group(1):
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228 | if not check_condition(res.group(1), defaults):
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229 | if default is not None:
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230 | outf.write('#!# %s = %s\n' % (varname, default))
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231 | continue
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232 |
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233 | if vartype == 'y/n':
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234 | result = dlg.yesno(comment, default)
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235 | elif vartype == 'n/y':
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236 | result = dlg.noyes(comment, default)
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237 | elif vartype == 'choice':
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238 | defopt = None
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239 | if default is not None:
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240 | for i,(key,val) in enumerate(choices):
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241 | if key == default:
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242 | defopt = i
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243 | break
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244 | result = dlg.choice(comment, choices, defopt)
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245 | else:
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246 | raise RuntimeError("Bad method: %s" % vartype)
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247 | outf.write('%s = %s\n' % (varname, result))
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248 | # Remeber the selected value
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249 | defaults[varname] = result
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250 | # Clear cumulated values
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251 | comment = ''
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252 | default = None
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253 | choices = []
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254 | continue
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255 |
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256 | if line.startswith('@'):
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257 | # Add new line into the 'choice array'
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258 | res = re.match(r'@\s*(?:\[(.*?)\])?\s*"(.*?)"\s*(.*)$', line)
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259 | if not res:
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260 | raise RuntimeError("Bad line: %s" % line)
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261 | if res.group(1):
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262 | if not check_condition(res.group(1),defaults):
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263 | continue
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264 | choices.append((res.group(2), res.group(3)))
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265 | continue
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266 |
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267 | # All other things print to output file
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268 | outf.write(line)
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269 | if re.match(r'^#[^#]', line):
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270 | # Last comment before question will be displayed to the user
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271 | comment = line[1:].strip()
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272 | elif line.startswith('##'):
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273 | # Set title of the dialog window
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274 | dlg.set_title(line[2:].strip())
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275 |
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276 | outf.close()
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277 | f.close()
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278 |
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279 | def main():
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280 | defaults = {'ARCH':None}
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281 | try:
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282 | dlg = Dialog()
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283 | except NotImplementedError:
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284 | dlg = NoDialog()
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285 |
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286 | # Default run will update the configuration file
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287 | # with newest options
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288 | if len(sys.argv) >= 2:
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289 | defaults['ARCH'] = sys.argv[1]
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290 | if len(sys.argv) == 3 and sys.argv[2]=='default':
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291 | dlg = DefaultDialog(dlg)
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292 |
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293 | if os.path.exists(OUTPUT):
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294 | read_defaults(OUTPUT, defaults)
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295 |
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296 | parse_config(INPUT, TMPOUTPUT, dlg, defaults)
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297 | if os.path.exists(OUTPUT):
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298 | os.unlink(OUTPUT)
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299 | os.rename(TMPOUTPUT, OUTPUT)
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300 |
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301 |
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302 | if __name__ == '__main__':
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303 | main()
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