TraceTree

Print TracePoint(:b_call, :b_return, :c_call, :c_return, :call, :return, :class, :end, :thread_begin, :thread_end) in tree view, to console or html.

Notice: it does not trace :raise, which can be represented by Kernel#raise(:c_call)

Installation

Add this line to your application's Gemfile:

gem 'trace_tree'

And then execute:

$ bundle

Or install it yourself as:

$ gem install trace_tree

Usage

Just call the method you want to trace in the block passed to binding.trace_tree:

things_done = binding.trace_tree do
  somebody.do_something
end

Parameters

You may pass optional parameters while invoking binding.trace_tree, for example:

binding.trace_tree(file, color: false, gem: false) do
  somebody.do_something
end

• file == STDOUT by default. You can give it a File object or anything responds to puts.
• :color => true by default. It makes method names have different color than source_location in output. When you print the output to file, you may want to set it false to discard those color ANSI escape sequences.
• :gem => true by default. Replace the gem paths in source_location with $GemPathN, can make the lines shorter. To see what are replaced, inspect TraceTree::GemPaths.
• :html => nil by default. Set it true to generate a html in which a tree constructed with <ul>, <li>. (No need to set color).
• :tmp => nil by default. Set it true or a string or an array of string to specify a tmp file under the default tmp dir of your system. (No need to provide file argument. It makes parent directories as needed)
• :timer => nil by default. Set it true if you want to know how much time spent in tracing and drawing tree. Notice the file should be appendable, otherwise the time will overwrite the tree.

Example

Want to know what Sinatra::Base#call does? Wrap it with binding.trace_tree:

require 'sinatra'
require 'trace_tree'

get '/' do
  'welcome'
end

class Sinatra::Base
  alias_method :o_call, :call

  def call env
    binding.trace_tree do
      o_call env
    end
  end
end

Execute that sinatra script as normal, then you will see in console:

Sinatra::Application#block in call sin.rb:12