Fast execution control in Pry

Adds step, next, finish and continue commands and breakpoints to Pry using byebug.

To use, invoke pry normally. No need to start your script or app differently.

def some_method
  binding.pry          # Execution will stop here.
  puts 'Hello World'   # Run 'step' or 'next' in the console to move here.
end

For a complete debugging environment, add pry-stack_explorer for call-stack frame navigation.

Drop

gem 'pry-byebug'

in your Gemfile and run

bundle install

Make sure you include the gem globally or inside the :test group if you plan to use it to debug your tests!

step: Step execution into the next line or method. Takes an optional numeric argument to step multiple times. Aliased to s

next: Step over to the next line within the same frame. Also takes an optional numeric argument to step multiple lines. Aliased to n

finish: Execute until current stack frame returns. Aliased to f

continue: Continue program execution and end the Pry session. Aliased to c

You can set and adjust breakpoints directly from a Pry session using the following commands:

break: Set a new breakpoint from a line number in the current file, a file and line number, or a method. Pass an optional expression to create a conditional breakpoint. Edit existing breakpoints via various flags.

Examples:

break SomeClass#run            # Break at the start of `SomeClass#run`.
break Foo#bar if baz?          # Break at `Foo#bar` only if `baz?`.
break app/models/user.rb:15    # Break at line 15 in user.rb.
break 14                       # Break at line 14 in the current file.

break --condition 4 x > 2      # Change condition on breakpoint #4 to 'x > 2'.
break --condition 3            # Remove the condition on breakpoint #3.

break --delete 5               # Delete breakpoint #5.
break --disable-all            # Disable all breakpoints.

break                          # List all breakpoints. (Same as `breakpoints`)
break --show 2                 # Show details about breakpoint #2.

Type break --help from a Pry session to see all available options.

breakpoints: List all defined breakpoints. Pass -v or --verbose to see the source code around each breakpoint.

Only supports MRI 2.0.0 or newer. For MRI 1.9.3 or older, use pry-debugger

• Gopal Patel (@nixme), creator of pry-debugger, and everybody who contributed to it. pry-byebug is a fork of pry-debugger so it wouldn't exist as it is without those contributions.
• John Mair (@banister), creator of pry.

Patches and bug reports are welcome. Just send a pull request or file an issue. Project changelog.