The tracer gem provides helpful tracing utilities to help users observe their program's runtime behaviour.

The currently supported tracers are:

It also comes with experimental IRB integration to allow quick access from REPL.

Installation

$ bundle add tracer --group=development,test

Or directly add it to your Gemfile

group :development, :test do
  gem "tracer"
end

If bundler is not being used to manage dependencies, install the gem by executing:

$ gem install tracer

Usage

Tracer.trace(object) { ... } # trace object's activities in the given block
Tracer.trace_call { ... } # trace method calls in the given block
Tracer.trace_exception { ... } # trace exceptions in the given block

Example

"require "tracer" obj = Object.new def obj.foo 100 end def bar(obj) obj.foo end Tracer.trace(obj) { bar(obj) } #depth:1 #