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# # shell/builtin-command.rb - # $Release Version: 0.7 $ # $Revision: 31641 $ # by Keiju ISHITSUKA(keiju@ruby-lang.org) # # -- # # # require "shell/filter" class Shell class BuiltInCommand<Filter def wait? false end def active? true end end class Void < BuiltInCommand def initialize(sh, *opts) super sh end def each(rs = nil) # do nothing end end class Echo < BuiltInCommand def initialize(sh, *strings) super sh @strings = strings end def each(rs = nil) rs = @shell.record_separator unless rs for str in @strings yield str + rs end end end class Cat < BuiltInCommand def initialize(sh, *filenames) super sh @cat_files = filenames end def each(rs = nil) if @cat_files.empty? super else for src in @cat_files @shell.foreach(src, rs){|l| yield l} end end end end class Glob < BuiltInCommand def initialize(sh, pattern) super sh @pattern = pattern end def each(rs = nil) if @pattern[0] == ?/ @files = Dir[@pattern] else prefix = @shell.pwd+"/" @files = Dir[prefix+@pattern].collect{|p| p.sub(prefix, "")} end rs = @shell.record_separator unless rs for f in @files yield f+rs end end end # class Sort < Cat # def initialize(sh, *filenames) # super # end # # def each(rs = nil) # ary = [] # super{|l| ary.push l} # for l in ary.sort! # yield l # end # end # end class AppendIO < BuiltInCommand def initialize(sh, io, filter) super sh @input = filter @io = io end def input=(filter) @input.input=filter for l in @input @io << l end end end class AppendFile < AppendIO def initialize(sh, to_filename, filter) @file_name = to_filename io = sh.open(to_filename, "a") super(sh, io, filter) end def input=(filter) begin super ensure @io.close end end end class Tee < BuiltInCommand def initialize(sh, filename) super sh @to_filename = filename end def each(rs = nil) to = @shell.open(@to_filename, "w") begin super{|l| to << l; yield l} ensure to.close end end end class Concat < BuiltInCommand def initialize(sh, *jobs) super(sh) @jobs = jobs end def each(rs = nil) while job = @jobs.shift job.each{|l| yield l} end end end end
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