ruby - irb history not working

Question

in ~/.irbrc i have these lines:

require 'irb/ext/save-history'
#History configuration
IRB.conf[:SAVE_HISTORY] = 100
IRB.conf[:HISTORY_FILE] = "#{ENV['HOME']}/.irb-save-history"

and yet when i run irb and hit the up arrow nothing happens. also the irb history file specified is not getting created and nothing is logged to it.

Answer 1

irb history works in Debian Linux out of the box. There's no etc/irbrc, nor do I have a ~/.irbrc. So, hmmmm.

This person put a bit more in his irbrc than you did. Do you suppose the ARGV.concat could be the missing piece?

require 'irb/completion'
require 'irb/ext/save-history'
ARGV.concat [ "--readline", "--prompt-mode", "simple" ]
IRB.conf[:SAVE_HISTORY] = 100
IRB.conf[:HISTORY_FILE] = "#{ENV['HOME']}/.irb-save-history"