#

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# shell.rb -

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# $Release Version: 0.6.0 $

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# $Revision: 1.8 $

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# $Date: 2001/03/19 09:01:11 $

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# by Keiju ISHITSUKA(Nippon Rational Inc.)

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#

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# --

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#

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#

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#

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require "e2mmap"

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require "thread"

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require "shell/error"

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require "shell/command-processor"

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require "shell/process-controller"

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class Shell

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@RCS_ID='-$Id: shell.rb,v 1.8 2001/03/19 09:01:11 keiju Exp keiju $-'

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include Error

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extend Exception2MessageMapper

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# @cascade = true

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# debug: true -> normal debug

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# debug: 1 -> eval definition debug

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# debug: 2 -> detail inspect debug

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@debug = false

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@verbose = true

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class << Shell

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attr :cascade, true

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attr :debug, true

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attr :verbose, true

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# alias cascade? cascade

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alias debug? debug

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alias verbose? verbose

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@verbose = true

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def debug=(val)

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@debug = val

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@verbose = val if val

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end

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def cd(path)

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sh = new

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sh.cd path

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sh

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end

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def default_system_path

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if @default_system_path

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@default_system_path

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else

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ENV["PATH"].split(":")

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end

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end

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def default_system_path=(path)

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@default_system_path = path

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end

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def default_record_separator

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if @default_record_separator

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@default_record_separator

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else

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$/

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end

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end

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def default_record_separator=(rs)

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@default_record_separator = rs

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end

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end

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def initialize

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@cwd = Dir.pwd

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@dir_stack = []

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@umask = nil

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@system_path = Shell.default_system_path

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@record_separator = Shell.default_record_separator

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@command_processor = CommandProcessor.new(self)

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@process_controller = ProcessController.new(self)

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@verbose = Shell.verbose

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@debug = Shell.debug

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end

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attr_reader :system_path

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def system_path=(path)

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@system_path = path

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rehash

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end

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attr :umask, true

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attr :record_separator, true

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attr :verbose, true

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attr :debug, true

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def debug=(val)

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@debug = val

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@verbose = val if val

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end

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alias verbose? verbose

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alias debug? debug

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attr_reader :command_processor

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attr_reader :process_controller

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def expand_path(path)

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File.expand_path(path, @cwd)

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end

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# Most Shell commands are defined via CommandProcessor

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#

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# Dir related methods

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#

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# Shell#cwd/dir/getwd/pwd

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# Shell#chdir/cd

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# Shell#pushdir/pushd

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# Shell#popdir/popd

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# Shell#mkdir

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# Shell#rmdir

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attr :cwd

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alias dir cwd

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alias getwd cwd

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alias pwd cwd

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attr :dir_stack

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alias dirs dir_stack

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# If called as iterator, it restores the current directory when the

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# block ends.

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def chdir(path = nil)

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if iterator?

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cwd_old = @cwd

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begin

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chdir(path)

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yield

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ensure

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chdir(cwd_old)

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end

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else

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path = "~" unless path

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@cwd = expand_path(path)

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notify "current dir: #{@cwd}"

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rehash

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self

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end

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end

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alias cd chdir

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def pushdir(path = nil)

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if iterator?

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pushdir(path)

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begin

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yield

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ensure

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popdir

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end

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elsif path

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@dir_stack.push @cwd

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chdir path

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notify "dir stack: [#{@dir_stack.join ', '}]"

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self

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else

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if pop = @dir_stack.pop

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@dir_stack.push @cwd

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chdir pop

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notify "dir stack: [#{@dir_stack.join ', '}]"

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self

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else

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Shell.Fail DirStackEmpty

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end

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end

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end

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alias pushd pushdir

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def popdir

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if pop = @dir_stack.pop

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chdir pop

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notify "dir stack: [#{@dir_stack.join ', '}]"

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self

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else

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Shell.Fail DirStackEmpty

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end

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end

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alias popd popdir

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#

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# process management

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#

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def jobs

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@process_controller.jobs

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end

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def kill(sig, command)

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@process_controller.kill_job(sig, command)

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end

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#

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# command definitions

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#

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def Shell.def_system_command(command, path = command)

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CommandProcessor.def_system_command(command, path)

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end

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def Shell.undef_system_command(command)

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CommandProcessor.undef_system_command(command)

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end

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def Shell.alias_command(ali, command, *opts, &block)

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CommandProcessor.alias_command(ali, command, *opts, &block)

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end

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def Shell.unalias_command(ali)

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CommandProcessor.unalias_command(ali)

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end

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def Shell.install_system_commands(pre = "sys_")

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CommandProcessor.install_system_commands(pre)

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end

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#

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def inspect

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if debug.kind_of?(Integer) && debug > 2

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super

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else

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to_s

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end

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end

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def self.notify(*opts, &block)

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Thread.exclusive do

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if opts[-1].kind_of?(String)

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yorn = verbose?

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else

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yorn = opts.pop

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end

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return unless yorn

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_head = true

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print opts.collect{|mes|

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mes = mes.dup

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yield mes if iterator?

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if _head

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_head = false

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"shell: " + mes

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else

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" " + mes

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end

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}.join("\n")+"\n"

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end

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end

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CommandProcessor.initialize

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CommandProcessor.run_config

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end

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