Expect.rb in 1.8.2

ruby-talk
1

On my Linux box I've got Ruby 1.8.1 installed and it seems to have the
expect library:

irb(main):011:0> require 'expect'
=> true
irb(main):012:0> VERSION
=> "1.8.1"

However when I try to do that on my Windows box, it doesn't know anything
about expect.

Has the expect lib been removed from 1.8.2? Or, is it just not available
on Windows? ( I thought it was just a pure-Ruby, simple implementation)

Phil

2

Phil,

The 'expect.rb' library uses 'select()', which only works for sockets
on Windows, not regular file handles, IIRC. Looking at the source,
though, it seems to only work on a single file handle at a time,
anyway, so I'm not sure what it buys you something like the
uber-simple version below.

-- 'miniexpect.rb'
require 'timeout'

class IO
  def expect(pat, wait=9999999)
    result = nil
    buff = ''
    begin
      timeout(wait) do
        c = getc.chr
        buff << c
      
        if pat.match(buff)
          result = [buff, *mat.to_a[1..-1]]
        end
      end
    rescue Timeout::Error; end
    
    if block_given?
      yield result
    else
      return result
    end
  end
end

···

--

--
Lennon
rcoder.net

3

In article <5d4c6124040916141239321053@mail.gmail.com>,

···

Lennon Day-Reynolds <rcoder@gmail.com> wrote:

Phil,

The 'expect.rb' library uses 'select()', which only works for sockets
on Windows, not regular file handles, IIRC. Looking at the source,
though, it seems to only work on a single file handle at a time,
anyway, so I'm not sure what it buys you something like the
uber-simple version below.

-- 'miniexpect.rb'
require 'timeout'

class IO
def expect(pat, wait=9999999)
   result = nil
   buff = ''
   begin
     timeout(wait) do
       c = getc.chr
       buff << c
    
       if pat.match(buff)
         result = [buff, *mat.to_a[1..-1]]
       end
     end
   rescue Timeout::Error; end
   
   if block_given?
     yield result
   else
     return result
   end
end
end
--

--
Lennon
rcoder.net

4

In article <cid4d9023v@enews1.newsguy.com>,

···

Phil Tomson <ptkwt@aracnet.com> wrote:

In article <5d4c6124040916141239321053@mail.gmail.com>,
Lennon Day-Reynolds <rcoder@gmail.com> wrote:

Phil,

The 'expect.rb' library uses 'select()', which only works for sockets
on Windows, not regular file handles, IIRC. Looking at the source,
though, it seems to only work on a single file handle at a time,
anyway, so I'm not sure what it buys you something like the
uber-simple version below.

-- 'miniexpect.rb'
require 'timeout'

class IO
def expect(pat, wait=9999999)
   result = nil
   buff = ''
   begin
     timeout(wait) do
       c = getc.chr
       buff << c
    
       if pat.match(buff)
         result = [buff, *mat.to_a[1..-1]]
       end
     end
   rescue Timeout::Error; end
   
   if block_given?
     yield result
   else
     return result
   end
end
end
--

--
Lennon
rcoder.net

I hit 'send' a bit prematurely...

There is no PTY lib on Windows either (not surprising); all of the expect
examples I've seen seem to rely on it.

Phil