nvim-dap-ruby

The goal of this library is to have a better out of the box experience using ruby with nvim. This library does not try to give you default configurations for all of your possible commands, ruther to give you a good point of reference.

If you need a more comprehensive solution please refere to nvim-dap-ruby instead.

Motivation

I was not able to debug minitests with neotest neither was I able to successfully debug rails with all existing adapters and while I was learning nvim I decided to create my own.

The strengths of this adapter is that it executes the configurations dynamically, based on your context. You can debug single ruby scripts and bundled applications like rails and minitests.

Requirements

• LazyVim
• nvim-dap
• ruby/debug
• optional: nvim-dap-ruby

Update your plugin configuration to include the repo and run the setup method.

return {
  "mfussenegger/nvim-dap",
  optional = true,
  dependencies = {
    {
      "n1xn/nvim-dap-ruby",
    },
  },
  opts = function(_, opts)
    require("dap-ruby").setup()
  end,
}

Update your Procfile.dev and your bin/dev scripts so that the debugger can attach to.

Procfile.dev

web: bundle exec rdbg -c -- bin/rails server -b ${HOST_NAME} -p ${RAILS_PORT}
css: bin/rails tailwindcss:watch

bin/dev

#!/usr/bin/env sh

export RAILS_PORT="${RAILS_PORT:-3000}"

export RUBY_DEBUG_OPEN="${RUBY_DEBUG_OPEN:-true}"
export RUBY_DEBUG_LAZY="${RUBY_DEBUG_LAZY:-true}"
export RUBY_DEBUG_NONSTOP="${RUBY_DEBUG_NONSTOP:-true}"

export RUBY_DEBUG_HOST="${RUBY_DEBUG_HOST:-127.0.0.1}"
export RUBY_DEBUG_PORT="${RUBY_DEBUG_PORT:-33333}"

exec foreman start -f Procfile "$@"

How to

ruby on rails

Important

Whenever you are running a command you want to debug, rdbg must be called beforehand so the debugger can attach to to process.

Usually the debugger will inform you about the port which you can attach to: DEBUGGER: Debugger can attach via TCP/IP (127.0.0.1:33333)