Module: IRB::Pager

Defined in:
lib/irb-pager.rb

Defined Under Namespace

Modules: PagerHelper

Class Method Summary collapse

Class Method Details

.pager(obj = nil, opts = nil, &exe) ⇒ Object 



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# File 'lib/irb-pager.rb', line 19

def self.pager obj = nil, opts = nil, &exe
	if block_given?
		stdout, stderr, stdin, pager, rescuing = PagerHelper.options( opts || obj)
		pid, dupout, duperr, dupin = nil, stdout.dup, stderr.dup, stdin.dup
		IO.pipe do |inrd, inwr|
			begin
				IO.pipe do |rd, wr|
					pid = Process.fork do
						stdin.reopen rd
						wr.close
						exec *pager
					end
					stdout.reopen wr
					stderr.reopen wr
					stdin.reopen inrd
					if rescuing
						begin
							yield
						rescue Object
							stdout.puts PagerHelper.exception_formatter
						end
					else
						yield
					end
				end
			ensure
				stdout.reopen dupout
				stderr.reopen duperr
				Process.wait pid
				stdin.reopen dupin
			end
		end
	else
		pager( opts) { Kernel.p obj }
	end
end