less paging support

[wakproductions]

Your proposal
What is your idea?

When inspecting a large object, it could endlessly scroll for hundreds of lines on the screen. pry-rails incorporates less into the REPL so that very long inspections are paginated. How can we do that with this tool?

[kisp]

I also think this would be useful. I would want to use this for reading the outputs of commands like help or ls.

[technicalpickles]

I came here to report the same thing. I've often had to debug things that have an ridiculously deep object graph, that is dozens of pages long. I've found that it is not paginating with or without RUBY_DEBUG_IRB_CONSOLE=1.

The simplest reproduction case I've found is with the expression (1...1000).to_a, and you can test with:

• irb: paginates
• rdbg -- -e true: does not paginate
• RUBY_DEBUG_IRB_CONSOLE=1 rdbg -- -e true

[st0012]

@technicalpickles For irb:rdbg, I opened ruby/irb#1043 to page evaluation output too.