pry-stack_explorer

Walk the stack in a Pry session

Note: Requires Ruby 2.6+ as of version 0.5.0.

pry-stack_explorer is a plugin for the Pry REPL that enables the user to navigate the call-stack.

From the point a Pry session is started, the user can move up the stack through parent frames, examine state, and even evaluate code.

Unlike ruby-debug, pry-stack_explorer incurs no runtime cost and enables navigation right up the call-stack to the birth of the program.

The up, down, frame and show-stack commands are provided. See Pry's in-session help for more information on any of these commands.

Usage

Provides commands available in Pry sessions.

Commands:

• up/down - Move up or down the call stack
• frame [n] - Go to frame n
• show-stack - Show call stack

Install

In Gemfile:

gem 'pry-stack_explorer', '~> 0.5.0'

gem install pry-stack_explorer

• Read the documentation
• See the wiki for in-depth usage information.

Example:

Here we run the following ruby script:

require 'pry-stack_explorer'

def alpha
  x = "hello"
  beta
  puts x
end

def beta
  binding.pry
end

alpha

We wander around the stack a little bit, and modify the state of a frame above the one we binding.pry'd at.

Output from above is Goodbye as we changed the x local inside the alpha (caller) stack frame.

Compatible versions

• v0.5: Ruby 2.6+, Pry 0.13+
• v0.4.10: Ruby 2.6+, Pry 0.12+
• v0.4.9.3: Ruby 2.5 and older

License

Released under the MIT License by John Mair (banisterfiend) and contributors

Contributions to this gem are released under the same license.