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# frozen_string_literal: true
class Pry
class Command
class Wtf < Pry::ClassCommand
match(/wtf([?!]*)/)
group 'Context'
description 'Show the backtrace of the most recent exception.'
options listing: 'wtf?'
banner <<-'BANNER'
Usage: wtf[?|!]
Show's a few lines of the backtrace of the most recent exception (also available
as `_ex_.backtrace`). If you want to see more lines, add more question marks or
exclamation marks.
wtf?
wtf?!???!?!?
# To see the entire backtrace, pass the `-v` or `--verbose` flag.
wtf -v
BANNER
def options(opt)
opt.on :v, :verbose, "Show the full backtrace"
end
def process
raise Pry::CommandError, "No most-recent exception" unless exception
output.puts "#{bold('Exception:')} #{exception.class}: #{exception}\n--"
if opts.verbose?
output.puts with_line_numbers(backtrace)
else
output.puts with_line_numbers(backtrace.first(size_of_backtrace))
end
return unless exception.respond_to?(:cause)
cause = exception.cause
while cause
output.puts "#{bold('Caused by:')} #{cause.class}: #{cause}\n--"
if opts.verbose?
output.puts with_line_numbers(cause.backtrace)
else
output.puts with_line_numbers(cause.backtrace.first(size_of_backtrace))
end
cause = cause.cause
end
end
private
def exception
pry_instance.last_exception
end
def with_line_numbers(backtrace)
Pry::Code.new(backtrace, 0, :text).with_line_numbers.to_s
end
def backtrace
exception.backtrace
end
def size_of_backtrace
[captures[0].size, 0.5].max * 10
end
end
Pry::Commands.add_command(Pry::Command::Wtf)
end
end
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