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#
# shell/builtin-command.rb -
# $Release Version: 0.7 $
# $Revision: 47246 $
# 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 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