nvim/lua/plugins/mason-nvim-dap.lua

local M = {
	'jay-babu/mason-nvim-dap.nvim',
	dependencies = {
		'williamboman/mason.nvim',
		'mfussenegger/nvim-dap',
	},
	cmd = { 'DapInstall', 'DapUninstall' },
}

function M.config()
	local dap = require 'dap'
	require('mason-nvim-dap').setup {
		automatic_setup = true,
	}
	require('mason-nvim-dap').setup_handlers {
		function(source_name)
			-- all sources with no handler get passed here

			-- Keep original functionality of `automatic_setup = true`
			require 'mason-nvim-dap.automatic_setup'(source_name)
		end,
		elixir = function(source_name)
			dap.adapters.mix_task = {
				type = 'executable',
				command = '/home/user/.local/share/nvim/mason/packages/elixir-ls/debugger.sh', -- debugger.bat for windows
				args = {},
			}
			dap.configurations.elixir = {
				{
					type = 'mix_task',
					name = 'mix test',
					task = 'test',
					taskArgs = { '--trace' },
					request = 'launch',
					startApps = true, -- for Phoenix projects
					projectDir = '${workspaceFolder}',
					requireFiles = {
						'test/**/test_helper.exs',
						'test/**/*_test.exs',
					},
				},
			}
		end,
	}
end

return M