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# frozen_string_literal: true
require_relative 'destination_base'
module ProcessExecuter
module Destinations
# Handles numeric file descriptors
#
# @api private
class FileDescriptor < DestinationBase
# Writes data to the file descriptor
#
# @param data [String] the data to write
#
# @return [Integer] the number of bytes written
#
# @raise [SystemCallError] if the file descriptor is invalid
#
# @example
# fd_handler = ProcessExecuter::Destinations::FileDescriptor.new(3)
# fd_handler.write("Hello world")
#
def write(data)
super
io = ::IO.open(destination, mode: 'a', autoclose: false)
io.write(data).tap { io.close }
end
# Determines if this class can handle the given destination
#
# @param destination [Object] the destination to check
#
# @return [Boolean] true if destination is a file descriptor that's not stdout or stderr
#
def self.handles?(destination)
destination.is_a?(Integer) && ![1, 2].include?(destination)
end
end
end
end
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