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# frozen_string_literal: true
#
# irb/lib/tracer.rb -
# by Keiju ISHITSUKA(keiju@ruby-lang.org)
#
# Loading the gem "tracer" will cause it to extend IRB commands with:
# https://github.com/ruby/tracer/blob/v0.2.2/lib/tracer/irb.rb
begin
require "tracer"
rescue LoadError
$stderr.puts "Tracer extension of IRB is enabled but tracer gem wasn't found."
return # This is about to disable loading below
end
module IRB
class CallTracer < ::CallTracer
IRB_DIR = File.expand_path('../..', __dir__)
def skip?(tp)
super || tp.path.match?(IRB_DIR) || tp.path.match?('<internal:prelude>')
end
end
class WorkSpace
alias __evaluate__ evaluate
# Evaluate the context of this workspace and use the Tracer library to
# output the exact lines of code are being executed in chronological order.
#
# See https://github.com/ruby/tracer for more information.
def evaluate(statements, file = __FILE__, line = __LINE__)
if IRB.conf[:USE_TRACER] == true
CallTracer.new(colorize: Color.colorable?).start do
__evaluate__(statements, file, line)
end
else
__evaluate__(statements, file, line)
end
end
end
end
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