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 | import commands
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9 |
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10 | INPUT = 'kernel.config'
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11 | OUTPUT = 'Makefile.config'
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12 | TMPOUTPUT = 'Makefile.config.tmp'
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13 |
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14 | class DefaultDialog:
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15 | "Wrapper dialog that tries to return default values"
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16 | def __init__(self, dlg):
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17 | self.dlg = dlg
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18 |
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19 | def set_title(self,text):
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20 | self.dlg.set_title(text)
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21 |
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22 | def yesno(self, text, default=None):
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23 | if default is not None:
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24 | return default
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25 | return self.dlg.yesno(text, default)
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26 | def noyes(self, text, default=None):
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27 | if default is not None:
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28 | return default
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29 | return self.dlg.noyes(text, default)
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30 |
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31 | def choice(self, text, choices, defopt=None):
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32 | if defopt is not None:
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33 | return choices[defopt][0]
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34 | return self.dlg.choice(text, choices, defopt)
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35 |
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36 | class NoDialog:
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37 | def __init__(self):
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38 | self.printed = None
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39 | self.title = 'HelenOS Configuration'
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40 |
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41 | def print_title(self):
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42 | if not self.printed:
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43 | sys.stdout.write("\n*** %s ***\n" % self.title)
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44 | self.printed = True
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45 |
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46 | def set_title(self, text):
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47 | self.title = text
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48 | self.printed = False
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49 |
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50 | def noyes(self, text, default=None):
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51 | if not default:
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52 | default = 'n'
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53 | return self.yesno(text, default)
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54 |
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55 | def yesno(self, text, default=None):
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56 | self.print_title()
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57 |
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58 | if default != 'n':
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59 | default = 'y'
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60 | while 1:
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61 | sys.stdout.write("%s (y/n)[%s]: " % (text,default))
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62 | inp = sys.stdin.readline()
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63 | if not inp:
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64 | raise EOFError
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65 | inp = inp.strip().lower()
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66 | if not inp:
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67 | return default
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68 | if inp == 'y':
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69 | return 'y'
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70 | elif inp == 'n':
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71 | return 'n'
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72 |
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73 | def _print_choice(self, text, choices, defopt):
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74 | sys.stdout.write('%s:\n' % text)
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75 | for i,(text,descr) in enumerate(choices):
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76 | sys.stdout.write('\t%2d. %s\n' % (i, descr))
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77 | if defopt is not None:
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78 | sys.stdout.write('Enter choice number[%d]: ' % defopt)
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79 | else:
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80 | sys.stdout.write('Enter choice number: ')
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81 |
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82 | def menu(self, text, choices, button, defopt=None):
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83 | self.title = 'Main menu'
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84 | menu = []
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85 | for key, descr in choices:
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86 | txt = key + (45-len(key))*' ' + ': ' + descr
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87 | menu.append((key, txt))
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88 |
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89 | return self.choice(text, [button] + menu)
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90 |
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91 | def choice(self, text, choices, defopt=None):
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92 | self.print_title()
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93 | while 1:
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94 | self._print_choice(text, choices, defopt)
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95 | inp = sys.stdin.readline()
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96 | if not inp:
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97 | raise EOFError
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98 | if not inp.strip():
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99 | if defopt is not None:
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100 | return choices[defopt][0]
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101 | continue
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102 | try:
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103 | number = int(inp.strip())
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104 | except ValueError:
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105 | continue
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106 | if number < 0 or number >= len(choices):
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107 | continue
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108 | return choices[number][0]
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109 |
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110 |
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111 | class Dialog(NoDialog):
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112 | def __init__(self):
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113 | NoDialog.__init__(self)
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114 | self.dlgcmd = os.environ.get('DIALOG','dialog')
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115 | self.title = ''
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116 | self.backtitle = 'HelenOS Kernel Configuration'
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117 |
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118 | if os.system('%s --print-maxsize >/dev/null 2>&1' % self.dlgcmd) != 0:
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119 | raise NotImplementedError
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120 |
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121 | def set_title(self,text):
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122 | self.title = text
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123 |
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124 | def calldlg(self,*args,**kw):
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125 | "Wrapper for calling 'dialog' program"
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126 | indesc, outdesc = os.pipe()
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127 | pid = os.fork()
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128 | if not pid:
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129 | os.close(2)
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130 | os.dup(outdesc)
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131 | os.close(indesc)
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132 |
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133 | dlgargs = [self.dlgcmd,'--title',self.title,
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134 | '--backtitle', self.backtitle]
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135 | for key,val in kw.items():
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136 | dlgargs.append('--'+key)
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137 | dlgargs.append(val)
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138 | dlgargs += args
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139 | os.execlp(self.dlgcmd,*dlgargs)
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140 |
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141 | os.close(outdesc)
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142 |
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143 | try:
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144 | errout = os.fdopen(indesc,'r')
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145 | data = errout.read()
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146 | errout.close()
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147 | pid,status = os.wait()
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148 | except:
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149 | os.system('reset') # Reset terminal
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150 | raise
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151 |
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152 | if not os.WIFEXITED(status):
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153 | os.system('reset') # Reset terminal
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154 | raise EOFError
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155 |
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156 | status = os.WEXITSTATUS(status)
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157 | if status == 255:
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158 | raise EOFError
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159 | return status,data
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160 |
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161 | def yesno(self, text, default=None):
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162 | if text[-1] not in ('?',':'):
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163 | text = text + ':'
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164 | width = '50'
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165 | height = '5'
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166 | if len(text) < 48:
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167 | text = ' '*int(((48-len(text))/2)) + text
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168 | else:
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169 | width = '0'
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170 | height = '0'
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171 | if default == 'n':
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172 | res,data = self.calldlg('--defaultno','--yesno',text,height,width)
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173 | else:
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174 | res,data = self.calldlg('--yesno',text,height,width)
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175 |
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176 | if res == 0:
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177 | return 'y'
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178 | return 'n'
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179 |
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180 | def menu(self, text, choices, button, defopt=None):
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181 | self.title = 'Main menu'
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182 | text = text + ':'
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183 | width = '70'
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184 | height = str(8 + len(choices))
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185 | args = []
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186 | for key,val in choices:
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187 | args.append(key)
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188 | args.append(val)
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189 |
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190 | kw = {}
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191 | if defopt:
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192 | kw['default-item'] = choices[defopt][0]
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193 | res,data = self.calldlg('--ok-label','Change',
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194 | '--extra-label',button[1],
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195 | '--extra-button',
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196 | '--menu',text,height,width,
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197 | str(len(choices)),*args,**kw)
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198 | if res == 3:
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199 | return button[0]
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200 | if res == 1: # Cancel
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201 | sys.exit(1)
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202 | elif res:
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203 | print data
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204 | raise EOFError
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205 | return data
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206 |
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207 | def choice(self, text, choices, defopt=None):
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208 | text = text + ':'
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209 | width = '50'
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210 | height = str(8 + len(choices))
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211 | args = []
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212 | for key,val in choices:
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213 | args.append(key)
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214 | args.append(val)
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215 |
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216 | kw = {}
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217 | if defopt:
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218 | kw['default-item'] = choices[defopt][0]
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219 | res,data = self.calldlg('--nocancel','--menu',text,height,width,
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220 | str(len(choices)),*args, **kw)
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221 | if res:
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222 | print data
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223 | raise EOFError
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224 | return data
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225 |
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226 | def read_defaults(fname,defaults):
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227 | "Read saved values from last configuration run"
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228 | f = file(fname,'r')
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229 | for line in f:
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230 | res = re.match(r'^(?:#!# )?([^#]\w*)\s*=\s*(.*?)\s*$', line)
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231 | if res:
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232 | defaults[res.group(1)] = res.group(2)
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233 | f.close()
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234 |
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235 | def check_condition(text, defaults, asked_names):
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236 | seen_vars = [ x[0] for x in asked_names ]
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237 | ctype = 'cnf'
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238 | if ')|' in text or '|(' in text:
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239 | ctype = 'dnf'
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240 |
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241 | if ctype == 'cnf':
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242 | conds = text.split('&')
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243 | else:
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244 | conds = text.split('|')
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245 |
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246 | for cond in conds:
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247 | if cond.startswith('(') and cond.endswith(')'):
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248 | cond = cond[1:-1]
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249 |
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250 | inside = check_inside(cond, defaults, ctype, seen_vars)
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251 |
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252 | if ctype == 'cnf' and not inside:
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253 | return False
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254 | if ctype == 'dnf' and inside:
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255 | return True
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256 |
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257 | if ctype == 'cnf':
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258 | return True
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259 | return False
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260 |
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261 | def check_inside(text, defaults, ctype, seen_vars):
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262 | """
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263 | Check that the condition specified on input line is True
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264 |
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265 | only CNF is supported
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266 | """
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267 | if ctype == 'cnf':
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268 | conds = text.split('|')
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269 | else:
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270 | conds = text.split('&')
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271 | for cond in conds:
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272 | res = re.match(r'^(.*?)(!?=)(.*)$', cond)
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273 | if not res:
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274 | raise RuntimeError("Invalid condition: %s" % cond)
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275 | condname = res.group(1)
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276 | oper = res.group(2)
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277 | condval = res.group(3)
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278 | if condname not in seen_vars:
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279 | varval = ''
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280 | ## raise RuntimeError("Variable %s not defined before being asked." %\
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281 | ## condname)
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282 | elif not defaults.has_key(condname):
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283 | raise RuntimeError("Condition var %s does not exist: %s" % \
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284 | (condname,text))
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285 | else:
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286 | varval = defaults[condname]
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287 | if ctype == 'cnf':
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288 | if oper == '=' and condval == varval:
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289 | return True
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290 | if oper == '!=' and condval != varval:
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291 | return True
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292 | else:
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293 | if oper== '=' and condval != varval:
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294 | return False
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295 | if oper== '!=' and condval == varval:
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296 | return False
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297 | if ctype=='cnf':
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298 | return False
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299 | return True
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300 |
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301 | def parse_config(input, output, dlg, defaults={}, askonly=None):
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302 | "Parse configuration file and create Makefile.config on the fly"
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303 | def ask_the_question(dialog):
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304 | "Ask question based on the type of variables to ask"
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305 | # This is quite a hack, this thingy is written just to
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306 | # have access to local variables..
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307 | if vartype == 'y/n':
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308 | return dialog.yesno(comment, default)
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309 | elif vartype == 'n/y':
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310 | return dialog.noyes(comment, default)
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311 | elif vartype == 'choice':
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312 | defopt = None
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313 | if default is not None:
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314 | for i,(key,val) in enumerate(choices):
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315 | if key == default:
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316 | defopt = i
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317 | break
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318 | return dialog.choice(comment, choices, defopt)
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319 | else:
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320 | raise RuntimeError("Bad method: %s" % vartype)
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321 |
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322 |
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323 | f = file(input, 'r')
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324 | outf = file(output, 'w')
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325 |
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326 | outf.write('#########################################\n')
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327 | outf.write('## AUTO-GENERATED FILE, DO NOT EDIT!!! ##\n')
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328 | outf.write('#########################################\n\n')
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329 |
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330 | asked_names = []
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331 |
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332 | comment = ''
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333 | default = None
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334 | choices = []
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335 | for line in f:
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336 | if line.startswith('%'):
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337 | res = re.match(r'^%\s*(?:\[(.*?)\])?\s*(.*)$', line)
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338 | if not res:
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339 | raise RuntimeError('Invalid command: %s' % line)
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340 | if res.group(1):
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341 | if not check_condition(res.group(1), defaults,
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342 | asked_names):
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343 | continue
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344 | args = res.group(2).strip().split(' ')
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345 | cmd = args[0].lower()
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346 | args = args[1:]
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347 | if cmd == 'saveas':
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348 | outf.write('%s = %s\n' % (args[1],defaults[args[0]]))
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349 | elif cmd == 'shellcmd':
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350 | varname = args[0]
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351 | args = args[1:]
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352 | for i,arg in enumerate(args):
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353 | if arg.startswith('$'):
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354 | args[i] = defaults[arg[1:]]
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355 | data,status = commands.getstatusoutput(' '.join(args))
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356 | if status:
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357 | raise RuntimeError('Error running: %s' % ' '.join(args))
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358 | outf.write('%s = %s\n' % (varname,data.strip()))
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359 | continue
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360 |
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361 | if line.startswith('!'):
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362 | # Ask a question
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363 | res = re.search(r'!\s*(?:\[(.*?)\])?\s*([^\s]+)\s*\((.*)\)\s*$', line)
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364 | if not res:
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365 | raise RuntimeError("Weird line: %s" % line)
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366 | varname = res.group(2)
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367 | vartype = res.group(3)
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368 |
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369 | default = defaults.get(varname,None)
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370 |
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371 | if res.group(1):
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372 | if not check_condition(res.group(1), defaults,
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373 | asked_names):
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374 | if default is not None:
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375 | outf.write('#!# %s = %s\n' % (varname, default))
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376 | # Clear cumulated values
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377 | comment = ''
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378 | default = None
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379 | choices = []
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380 | continue
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381 |
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382 | asked_names.append((varname,comment))
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383 |
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384 | if default is None or not askonly or askonly == varname:
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385 | default = ask_the_question(dlg)
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386 | else:
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387 | default = ask_the_question(DefaultDialog(dlg))
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388 |
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389 | outf.write('%s = %s\n' % (varname, default))
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390 | # Remeber the selected value
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391 | defaults[varname] = default
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392 | # Clear cumulated values
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393 | comment = ''
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394 | default = None
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395 | choices = []
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396 | continue
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397 |
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398 | if line.startswith('@'):
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399 | # Add new line into the 'choice array'
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400 | res = re.match(r'@\s*(?:\[(.*?)\])?\s*"(.*?)"\s*(.*)$', line)
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401 | if not res:
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402 | raise RuntimeError("Bad line: %s" % line)
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403 | if res.group(1):
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404 | if not check_condition(res.group(1),defaults,
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405 | asked_names):
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406 | continue
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407 | choices.append((res.group(2), res.group(3)))
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408 | continue
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409 |
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410 | # All other things print to output file
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411 | outf.write(line)
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412 | if re.match(r'^#[^#]', line):
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413 | # Last comment before question will be displayed to the user
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414 | comment = line[1:].strip()
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415 | elif line.startswith('## '):
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416 | # Set title of the dialog window
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417 | dlg.set_title(line[2:].strip())
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418 |
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419 | outf.write('\n')
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420 | outf.write('REVISION = %s\n' % commands.getoutput('svnversion . 2> /dev/null'))
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421 | outf.write('TIMESTAMP = %s\n' % commands.getoutput('date "+%Y-%m-%d %H:%M:%S"'))
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422 | outf.close()
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423 | f.close()
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424 | return asked_names
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425 |
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426 | def main():
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427 | defaults = {}
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428 | try:
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429 | dlg = Dialog()
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430 | except NotImplementedError:
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431 | dlg = NoDialog()
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432 |
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433 | if len(sys.argv) >= 2 and sys.argv[1]=='default':
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434 | defmode = True
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435 | else:
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436 | defmode = False
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437 |
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438 | # Default run will update the configuration file
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439 | # with newest options
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440 | if os.path.exists(OUTPUT):
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441 | read_defaults(OUTPUT, defaults)
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442 |
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443 | # Get ARCH from command line if specified
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444 | if len(sys.argv) >= 3:
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445 | defaults['ARCH'] = sys.argv[2]
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446 |
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447 | # Dry run only with defaults
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448 | varnames = parse_config(INPUT, TMPOUTPUT, DefaultDialog(dlg), defaults)
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449 | # If not in default mode, present selection of all possibilities
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450 | if not defmode:
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451 | defopt = 0
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452 | while 1:
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453 | # varnames contains variable names that were in the
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454 | # last question set
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455 | choices = [ (x[1],defaults[x[0]]) for x in varnames ]
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456 | res = dlg.menu('Configuration',choices,('save','Save'),defopt)
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457 | if res == 'save':
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458 | parse_config(INPUT, TMPOUTPUT, DefaultDialog(dlg), defaults)
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459 | break
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460 | # transfer description back to varname
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461 | for i,(vname,descr) in enumerate(varnames):
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462 | if res == descr:
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463 | defopt = i
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464 | break
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465 | # Ask the user a simple question, produce output
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466 | # as if the user answered all the other questions
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467 | # with default answer
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468 | varnames = parse_config(INPUT, TMPOUTPUT, dlg, defaults,
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469 | askonly=varnames[i][0])
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470 |
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471 |
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472 | if os.path.exists(OUTPUT):
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473 | os.unlink(OUTPUT)
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474 | os.rename(TMPOUTPUT, OUTPUT)
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475 |
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476 | if not defmode and dlg.yesno('Rebuild kernel?') == 'y':
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477 | os.execlp('make','make','clean','build')
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478 |
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479 | if __name__ == '__main__':
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480 | main()
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