# # shell/command-controller.rb - # $Release Version: 0.6.0 $ # $Revision$ # $Date$ # by Keiju ISHITSUKA(Nippon Rational Inc.) # # -- # # # require "e2mmap" require "ftools" require "thread" require "shell/error" require "shell/filter" require "shell/system-command" require "shell/builtin-command" class Shell class CommandProcessor # include Error # # initialize of Shell and related classes. # NoDelegateMethods = ["initialize", "expand_path"] def self.initialize install_builtin_commands # define CommandProccessor#methods to Shell#methods and Filter#methods for m in CommandProcessor.instance_methods(false) - NoDelegateMethods add_delegate_command_to_shell(m) end def self.method_added(id) add_delegate_command_to_shell(id) end end # # include run file. # def self.run_config begin load File.expand_path("~/.rb_shell") if ENV.key?("HOME") rescue LoadError, Errno::ENOENT rescue print "load error: #{rc}\n" print $!.class, ": ", $!, "\n" for err in $@[0, $@.size - 2] print "\t", err, "\n" end end end def initialize(shell) @shell = shell @system_commands = {} end # # CommandProcessor#expand_path(path) # path: String # return: String # returns the absolute path for # def expand_path(path) @shell.expand_path(path) end # # File related commands # Shell#foreach # Shell#open # Shell#unlink # Shell#test # # - # # CommandProcessor#foreach(path, rs) # path: String # rs: String - record separator # iterator # Same as: # File#foreach (when path is file) # Dir#foreach (when path is directory) # path is relative to pwd # def foreach(path = nil, *rs) path = "." unless path path = expand_path(path) if File.directory?(path) Dir.foreach(path){|fn| yield fn} else IO.foreach(path, *rs){|l| yield l} end end # # CommandProcessor#open(path, mode) # path: String # mode: String # return: File or Dir # Same as: # File#open (when path is file) # Dir#open (when path is directory) # mode has an effect only when path is a file # def open(path, mode) path = expand_path(path) if File.directory?(path) Dir.open(path) else effect_umask do File.open(path, mode) end end end # public :open # # CommandProcessor#unlink(path) # same as: # Dir#unlink (when path is directory) # File#unlink (when path is file) # def unlink(path) path = expand_path(path) if File.directory?(path) Dir.unlink(path) else IO.unlink(path) end end # # CommandProcessor#test(command, file1, file2) # CommandProcessor#[command, file1, file2] # command: char or String or Symbol # file1: String # file2: String(optional) # return: Boolean # same as: # test() (when command is char or length 1 string or symbol) # FileTest.command (others) # example: # sh[?e, "foo"] # sh[:e, "foo"] # sh["e", "foo"] # sh[:exists?, "foo"] # sh["exists?", "foo"] # def test(command, file1, file2=nil) file1 = expand_path(file1) file2 = expand_path(file2) if file2 command = command.id2name if command.kind_of?(Symbol) case command when Integer top_level_test(command, file1, file2) when String if command.size == 1 if file2 top_level_test(command, file1, file2) else top_level_test(command, file1) end else if file2 FileTest.send(command, file1, file2) else FileTest.send(command, file1) end end end end alias [] test # # Dir related methods # # Shell#mkdir # Shell#rmdir # #-- # # CommandProcessor#mkdir(*path) # path: String # same as Dir.mkdir() # def mkdir(*path) for dir in path Dir.mkdir(expand_path(dir)) end end # # CommandProcessor#rmdir(*path) # path: String # same as Dir.rmdir() # def rmdir(*path) for dir in path Dir.rmdir(expand_path(dir)) end end # # CommandProcessor#system(command, *opts) # command: String # opts: String # return: SystemCommand # Same as system() function # example: # print sh.system("ls", "-l") # sh.system("ls", "-l") | sh.head > STDOUT # def system(command, *opts) if opts.empty? if command =~ /\*|\?|\{|\}|\[|\]|<|>|\(|\)|~|&|\||\\|\$|;|'|`|"|\n/ return SystemCommand.new(@shell, find_system_command("sh"), "-c", command) else command, *opts = command.split(/\s+/) end end SystemCommand.new(@shell, find_system_command(command), *opts) end # # ProcessCommand#rehash # clear command hash table. # def rehash @system_commands = {} end # # ProcessCommand#transact # def check_point @shell.process_controller.wait_all_jobs_execution end alias finish_all_jobs check_point def transact(&block) begin @shell.instance_eval(&block) ensure check_point end end # # internal commands # def out(dev = STDOUT, &block) dev.print transact(&block) end def echo(*strings) Echo.new(@shell, *strings) end def cat(*filenames) Cat.new(@shell, *filenames) end # def sort(*filenames) # Sort.new(self, *filenames) # end def glob(pattern) Glob.new(@shell, pattern) end def append(to, filter) case to when String AppendFile.new(@shell, to, filter) when IO AppendIO.new(@shell, to, filter) else Shell.Fail Error::CantApplyMethod, "append", to.class end end def tee(file) Tee.new(@shell, file) end def concat(*jobs) Concat.new(@shell, *jobs) end # %pwd, %cwd -> @pwd def notify(*opts, &block) Thread.exclusive do Shell.notify(*opts) {|mes| yield mes if iterator? mes.gsub!("%pwd", "#{@cwd}") mes.gsub!("%cwd", "#{@cwd}") } end end # # private functions # def effect_umask if @shell.umask Thread.critical = true save = File.umask begin yield ensure File.umask save Thread.critical = false end else yield end end private :effect_umask def find_system_command(command) return command if /^\// =~ command case path = @system_commands[command] when String if exists?(path) return path else Shell.Fail Error::CommandNotFound, command end when false Shell.Fail Error::CommandNotFound, command end for p in @shell.system_path path = join(p, command) if FileTest.exists?(path) @system_commands[command] = path return path end end @system_commands[command] = false Shell.Fail Error::CommandNotFound, command end # # CommandProcessor.def_system_command(command, path) # command: String # path: String # define 'command()' method as method. # def self.def_system_command(command, path = command) begin eval((d = %Q[def #{command}(*opts) SystemCommand.new(@shell, '#{path}', *opts) end]), nil, __FILE__, __LINE__ - 1) rescue SyntaxError Shell.notify "warn: Can't define #{command} path: #{path}." end Shell.notify "Define #{command} path: #{path}.", Shell.debug? Shell.notify("Definition of #{command}: ", d, Shell.debug.kind_of?(Integer) && Shell.debug > 1) end def self.undef_system_command(command) command = command.id2name if command.kind_of?(Symbol) remove_method(command) Shell.module_eval{remove_method(command)} Filter.module_eval{remove_method(command)} self end # define command alias # ex) # def_alias_command("ls_c", "ls", "-C", "-F") # def_alias_command("ls_c", "ls"){|*opts| ["-C", "-F", *opts]} # @alias_map = {} def self.alias_map @alias_map end def self.alias_command(ali, command, *opts, &block) ali = ali.id2name if ali.kind_of?(Symbol) command = command.id2name if command.kind_of?(Symbol) begin if iterator? @alias_map[ali.intern] = proc eval((d = %Q[def #{ali}(*opts) @shell.__send__(:#{command}, *(CommandProcessor.alias_map[:#{ali}].call *opts)) end]), nil, __FILE__, __LINE__ - 1) else args = opts.collect{|opt| '"' + opt + '"'}.join(",") eval((d = %Q[def #{ali}(*opts) @shell.__send__(:#{command}, #{args}, *opts) end]), nil, __FILE__, __LINE__ - 1) end rescue SyntaxError Shell.notify "warn: Can't alias #{ali} command: #{command}." Shell.notify("Definition of #{ali}: ", d) raise end Shell.notify "Define #{ali} command: #{command}.", Shell.debug? Shell.notify("Definition of #{ali}: ", d, Shell.debug.kind_of?(Integer) && Shell.debug > 1) self end def self.unalias_command(ali) ali = ali.id2name if ali.kind_of?(Symbol) @alias_map.delete ali.intern undef_system_command(ali) end # # CommandProcessor.def_builtin_commands(delegation_class, command_specs) # delegation_class: Class or Module # command_specs: [[command_name, [argument,...]],...] # command_name: String # arguments: String # FILENAME?? -> expand_path(filename??) # *FILENAME?? -> filename??.collect{|f|expand_path(f)}.join(", ") # define command_name(argument,...) as # delegation_class.command_name(argument,...) # def self.def_builtin_commands(delegation_class, command_specs) for meth, args in command_specs arg_str = args.collect{|arg| arg.downcase}.join(", ") call_arg_str = args.collect{ |arg| case arg when /^(FILENAME.*)$/ format("expand_path(%s)", $1.downcase) when /^(\*FILENAME.*)$/ # \*FILENAME* -> filenames.collect{|fn| expand_path(fn)}.join(", ") $1.downcase + '.collect{|fn| expand_path(fn)}' else arg end }.join(", ") d = %Q[def #{meth}(#{arg_str}) #{delegation_class}.#{meth}(#{call_arg_str}) end] Shell.notify "Define #{meth}(#{arg_str})", Shell.debug? Shell.notify("Definition of #{meth}: ", d, Shell.debug.kind_of?(Integer) && Shell.debug > 1) eval d end end # # CommandProcessor.install_system_commands(pre) # pre: String - command name prefix # defines every command which belongs in default_system_path via # CommandProcessor.command(). It doesn't define already defined # methods twice. By default, "pre_" is prefixes to each method # name. Characters that may not be used in a method name are # all converted to '_'. Definition errors are just ignored. # def self.install_system_commands(pre = "sys_") defined_meth = {} for m in Shell.methods defined_meth[m] = true end sh = Shell.new for path in Shell.default_system_path next unless sh.directory? path sh.cd path sh.foreach do |cn| if !defined_meth[pre + cn] && sh.file?(cn) && sh.executable?(cn) command = (pre + cn).gsub(/\W/, "_").sub(/^([0-9])/, '_\1') begin def_system_command(command, sh.expand_path(cn)) rescue Shell.notify "warn: Can't define #{command} path: #{cn}" end defined_meth[command] = command end end end end #---------------------------------------------------------------------- # # class initializing methods - # #---------------------------------------------------------------------- def self.add_delegate_command_to_shell(id) id = id.intern if id.kind_of?(String) name = id.id2name if Shell.method_defined?(id) Shell.notify "warn: override definnition of Shell##{name}." Shell.notify "warn: alias Shell##{name} to Shell##{name}_org.\n" Shell.module_eval "alias #{name}_org #{name}" end Shell.notify "method added: Shell##{name}.", Shell.debug? Shell.module_eval(%Q[def #{name}(*args, &block) begin @command_processor.__send__(:#{name}, *args, &block) rescue Exception $@.delete_if{|s| /:in `__getobj__'$/ =~ s} #` $@.delete_if{|s| /^\\(eval\\):/ =~ s} raise end end], __FILE__, __LINE__) if Shell::Filter.method_defined?(id) Shell.notify "warn: override definnition of Shell::Filter##{name}." Shell.notify "warn: alias Shell##{name} to Shell::Filter##{name}_org." Filter.module_eval "alias #{name}_org #{name}" end Shell.notify "method added: Shell::Filter##{name}.", Shell.debug? Filter.module_eval(%Q[def #{name}(*args, &block) begin self | @shell.__send__(:#{name}, *args, &block) rescue Exception $@.delete_if{|s| /:in `__getobj__'$/ =~ s} #` $@.delete_if{|s| /^\\(eval\\):/ =~ s} raise end end], __FILE__, __LINE__) end # # define default builtin commands # def self.install_builtin_commands # method related File. # (exclude open/foreach/unlink) normal_delegation_file_methods = [ ["atime", ["FILENAME"]], ["basename", ["fn", "*opts"]], ["chmod", ["mode", "*FILENAMES"]], ["chown", ["owner", "group", "*FILENAME"]], ["ctime", ["FILENAMES"]], ["delete", ["*FILENAMES"]], ["dirname", ["FILENAME"]], ["ftype", ["FILENAME"]], ["join", ["*items"]], ["link", ["FILENAME_O", "FILENAME_N"]], ["lstat", ["FILENAME"]], ["mtime", ["FILENAME"]], ["readlink", ["FILENAME"]], ["rename", ["FILENAME_FROM", "FILENAME_TO"]], # ["size", ["FILENAME"]], ["split", ["pathname"]], ["stat", ["FILENAME"]], ["symlink", ["FILENAME_O", "FILENAME_N"]], ["truncate", ["FILENAME", "length"]], ["utime", ["atime", "mtime", "*FILENAMES"]]] def_builtin_commands(File, normal_delegation_file_methods) alias_method :rm, :delete # method related FileTest def_builtin_commands(FileTest, FileTest.singleton_methods(false).collect{|m| [m, ["FILENAME"]]}) # method related ftools normal_delegation_ftools_methods = [ ["syscopy", ["FILENAME_FROM", "FILENAME_TO"]], ["copy", ["FILENAME_FROM", "FILENAME_TO"]], ["move", ["FILENAME_FROM", "FILENAME_TO"]], ["compare", ["FILENAME_FROM", "FILENAME_TO"]], ["safe_unlink", ["*FILENAMES"]], ["makedirs", ["*FILENAMES"]], # ["chmod", ["mode", "*FILENAMES"]], ["install", ["FILENAME_FROM", "FILENAME_TO", "mode"]], ] def_builtin_commands(File, normal_delegation_ftools_methods) alias_method :cmp, :compare alias_method :mv, :move alias_method :cp, :copy alias_method :rm_f, :safe_unlink alias_method :mkpath, :makedirs end end end 'n353' href='#n353'>353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478 479 480 481 482 483 484 485 486 487 488 489 490 491 492 493 494 495 496 497 498 499 500 501 502 503 504 505 506 507 508 509 510 511 512 513 514 515 516 517 518 519 520 521 522 523 524 525 526 527 528 529 530 531 532 533 534 535 536 537 538 539 540 541 542 543 544 545 546 547 548 549 550 551 552 553 554 555 556 557 558 559 560 561 562 563 564 565 566 567 568 569 570 571 572 573 574 575 576 577 578 579 580 581 582 583 584 585 586 587 588 589 590 591 592