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# frozen_string_literal: false
##
# Supports reading and writing gems from/to a generic IO object. This is
# useful for other applications built on top of rubygems, such as
# rubygems.org.
#
# This is a private class, do not depend on it directly. Instead, pass an IO
# object to `Gem::Package.new`.
class Gem::Package::IOSource < Gem::Package::Source # :nodoc: all
attr_reader :io
def initialize io
@io = io
end
def start
@start ||= begin
if io.pos > 0
raise Gem::Package::Error, "Cannot read start unless IO is at start"
end
value = io.read 20
io.rewind
value
end
end
def present?
true
end
def with_read_io
yield io
end
def with_write_io
yield io
end
def path
end
end