Looking for shell emulation with command completion

ruby-talk
1

Hi:

Has anyone written a ruby console app that supports
command completion? I am very interested in
seeing an example of how this can be done.

···

–
Jim Freeze

The qotc (quote of the con) was Liz’s:
“My brain is paged out to my liver”

2

Jim Freeze wrote:

Hi:

Has anyone written a ruby console app that supports
command completion? I am very interested in
seeing an example of how this can be done.

How about just using irb? It’s not hard to extract enough code from the
irb source so you can embed it within your own app. (I’ll post the code
if anyone’s interested.)

3

Never thought about that. Doesn’t irb use readline for
its command completion?

Please, post the code. I am interested.

···

On Friday, 28 February 2003 at 7:15:50 +0900, Joel VanderWerf wrote:

Jim Freeze wrote:

Hi:

Has anyone written a ruby console app that supports
command completion? I am very interested in
seeing an example of how this can be done.

How about just using irb? It’s not hard to extract enough code from the
irb source so you can embed it within your own app. (I’ll post the code
if anyone’s interested.)

–
Jim Freeze

It is now pitch dark. If you proceed, you will likely fall into a
pit.

4

Jim Freeze wrote:

Jim Freeze wrote:

Hi:

Has anyone written a ruby console app that supports
command completion? I am very interested in
seeing an example of how this can be done.

How about just using irb? It’s not hard to extract enough code from the
irb source so you can embed it within your own app. (I’ll post the code
if anyone’s interested.)

Never thought about that. Doesn’t irb use readline for
its command completion?

Yes.

···

On Friday, 28 February 2003 at 7:15:50 +0900, Joel VanderWerf wrote:

Please, post the code. I am interested.

=====================================
#!/usr/bin/env ruby

require ‘irb’
require ‘irb/completion’

module IRB
def IRB.start_session(object)
unless $irb
IRB.initialize nil
## maybe set some opts here, as in parse_opts in irb/init.rb?
IRB.load_modules
end

 workspace = WorkSpace.new(object)

 if @CONF[:SCRIPT] ## normally, set by parse_opts
   $irb = Irb.new(workspace, @CONF[:SCRIPT])
 else
   $irb = Irb.new(workspace)
 end

 @CONF[:IRB_RC].call($irb.context) if @CONF[:IRB_RC]
 @CONF[:MAIN_CONTEXT] = $irb.context

 trap 'INT' do
   $irb.signal_handle
 end

 catch :IRB_EXIT do
   $irb.eval_input
 end

 ## might want to reset your app's interrupt handler here

end
end

if FILE == $0
class Object
include IRB::ExtendCommandBundle # so that Marshal.dump works
end
x = Object.new
puts “\nStarted irb shell”
IRB.start_session(x)
puts “\nExited irb shell”
end

If you want to change the way the x object is displayed in the prompt,
just define a to_s method for it. Irb lets you customize the prompt, as
well, but I’ve never played with that much.