1 | #
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2 | # shell.rb -
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3 | # $Release Version: 0.6.0 $
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4 | # $Revision: 1.8 $
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5 | # $Date: 2001/03/19 09:01:11 $
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6 | # by Keiju ISHITSUKA(Nippon Rational Inc.)
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7 | #
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8 | # --
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9 | #
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10 | #
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11 | #
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12 |
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13 | require "e2mmap"
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14 | require "thread"
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15 |
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16 | require "shell/error"
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17 | require "shell/command-processor"
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18 | require "shell/process-controller"
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19 |
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20 | class Shell
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21 | @RCS_ID='-$Id: shell.rb,v 1.8 2001/03/19 09:01:11 keiju Exp keiju $-'
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22 |
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23 | include Error
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24 | extend Exception2MessageMapper
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25 |
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26 | # @cascade = true
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27 | # debug: true -> normal debug
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28 | # debug: 1 -> eval definition debug
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29 | # debug: 2 -> detail inspect debug
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30 | @debug = false
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31 | @verbose = true
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32 |
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33 | class << Shell
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34 | attr :cascade, true
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35 | attr :debug, true
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36 | attr :verbose, true
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37 |
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38 | # alias cascade? cascade
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39 | alias debug? debug
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40 | alias verbose? verbose
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41 | @verbose = true
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42 |
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43 | def debug=(val)
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44 | @debug = val
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45 | @verbose = val if val
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46 | end
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47 |
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48 | def cd(path)
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49 | sh = new
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50 | sh.cd path
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51 | sh
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52 | end
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53 |
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54 | def default_system_path
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55 | if @default_system_path
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56 | @default_system_path
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57 | else
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58 | ENV["PATH"].split(":")
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59 | end
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60 | end
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61 |
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62 | def default_system_path=(path)
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63 | @default_system_path = path
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64 | end
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65 |
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66 | def default_record_separator
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67 | if @default_record_separator
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68 | @default_record_separator
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69 | else
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70 | $/
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71 | end
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72 | end
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73 |
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74 | def default_record_separator=(rs)
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75 | @default_record_separator = rs
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76 | end
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77 | end
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78 |
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79 | def initialize
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80 | @cwd = Dir.pwd
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81 | @dir_stack = []
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82 | @umask = nil
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83 |
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84 | @system_path = Shell.default_system_path
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85 | @record_separator = Shell.default_record_separator
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86 |
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87 | @command_processor = CommandProcessor.new(self)
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88 | @process_controller = ProcessController.new(self)
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89 |
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90 | @verbose = Shell.verbose
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91 | @debug = Shell.debug
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92 | end
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93 |
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94 | attr_reader :system_path
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95 |
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96 | def system_path=(path)
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97 | @system_path = path
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98 | rehash
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99 | end
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100 |
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101 | attr :umask, true
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102 | attr :record_separator, true
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103 |
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104 | attr :verbose, true
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105 | attr :debug, true
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106 |
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107 | def debug=(val)
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108 | @debug = val
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109 | @verbose = val if val
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110 | end
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111 |
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112 | alias verbose? verbose
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113 | alias debug? debug
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114 |
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115 | attr_reader :command_processor
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116 | attr_reader :process_controller
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117 |
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118 | def expand_path(path)
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119 | File.expand_path(path, @cwd)
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120 | end
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121 |
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122 | # Most Shell commands are defined via CommandProcessor
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123 |
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124 | #
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125 | # Dir related methods
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126 | #
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127 | # Shell#cwd/dir/getwd/pwd
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128 | # Shell#chdir/cd
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129 | # Shell#pushdir/pushd
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130 | # Shell#popdir/popd
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131 | # Shell#mkdir
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132 | # Shell#rmdir
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133 |
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134 | attr :cwd
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135 | alias dir cwd
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136 | alias getwd cwd
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137 | alias pwd cwd
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138 |
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139 | attr :dir_stack
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140 | alias dirs dir_stack
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141 |
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142 | # If called as iterator, it restores the current directory when the
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143 | # block ends.
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144 | def chdir(path = nil)
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145 | if iterator?
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146 | cwd_old = @cwd
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147 | begin
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148 | chdir(path)
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149 | yield
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150 | ensure
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151 | chdir(cwd_old)
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152 | end
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153 | else
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154 | path = "~" unless path
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155 | @cwd = expand_path(path)
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156 | notify "current dir: #{@cwd}"
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157 | rehash
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158 | self
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159 | end
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160 | end
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161 | alias cd chdir
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162 |
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163 | def pushdir(path = nil)
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164 | if iterator?
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165 | pushdir(path)
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166 | begin
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167 | yield
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168 | ensure
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169 | popdir
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170 | end
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171 | elsif path
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172 | @dir_stack.push @cwd
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173 | chdir path
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174 | notify "dir stack: [#{@dir_stack.join ', '}]"
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175 | self
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176 | else
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177 | if pop = @dir_stack.pop
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178 | @dir_stack.push @cwd
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179 | chdir pop
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180 | notify "dir stack: [#{@dir_stack.join ', '}]"
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181 | self
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182 | else
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183 | Shell.Fail DirStackEmpty
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184 | end
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185 | end
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186 | end
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187 | alias pushd pushdir
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188 |
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189 | def popdir
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190 | if pop = @dir_stack.pop
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191 | chdir pop
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192 | notify "dir stack: [#{@dir_stack.join ', '}]"
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193 | self
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194 | else
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195 | Shell.Fail DirStackEmpty
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196 | end
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197 | end
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198 | alias popd popdir
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199 |
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200 |
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201 | #
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202 | # process management
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203 | #
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204 | def jobs
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205 | @process_controller.jobs
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206 | end
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207 |
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208 | def kill(sig, command)
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209 | @process_controller.kill_job(sig, command)
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210 | end
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211 |
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212 | #
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213 | # command definitions
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214 | #
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215 | def Shell.def_system_command(command, path = command)
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216 | CommandProcessor.def_system_command(command, path)
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217 | end
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218 |
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219 | def Shell.undef_system_command(command)
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220 | CommandProcessor.undef_system_command(command)
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221 | end
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222 |
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223 | def Shell.alias_command(ali, command, *opts, &block)
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224 | CommandProcessor.alias_command(ali, command, *opts, &block)
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225 | end
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226 |
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227 | def Shell.unalias_command(ali)
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228 | CommandProcessor.unalias_command(ali)
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229 | end
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230 |
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231 | def Shell.install_system_commands(pre = "sys_")
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232 | CommandProcessor.install_system_commands(pre)
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233 | end
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234 |
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235 | #
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236 | def inspect
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237 | if debug.kind_of?(Integer) && debug > 2
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238 | super
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239 | else
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240 | to_s
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241 | end
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242 | end
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243 |
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244 | def self.notify(*opts, &block)
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245 | Thread.exclusive do
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246 | if opts[-1].kind_of?(String)
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247 | yorn = verbose?
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248 | else
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249 | yorn = opts.pop
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250 | end
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251 | return unless yorn
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252 |
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253 | _head = true
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254 | print opts.collect{|mes|
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255 | mes = mes.dup
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256 | yield mes if iterator?
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257 | if _head
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258 | _head = false
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259 | "shell: " + mes
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260 | else
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261 | " " + mes
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262 | end
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263 | }.join("\n")+"\n"
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264 | end
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265 | end
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266 |
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267 | CommandProcessor.initialize
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268 | CommandProcessor.run_config
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269 | end
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