zsh-to-fish.rb

require 'yaml'

r = {}
File.open('dot.zsh-history') do |f|
  r = f.each_line.inject([]) do |a, l|
    a << { "cmd" => l[15..-1].to_s.scrub.strip, "when" => l[1..11].to_i }
  end
end

File.open('fish_history', 'w'){|f| f.write r.to_yaml(options = { line_width: -1 })}