nvim/lua/plugins/nvim-dap.lua

return {
    init = function()
        local dap = require('dap')
        -- configurations
        dap.configurations.python = {
            {
                type = 'python',
                request = 'launch',
                name = "Launch file",
                program = "${file}",
                pythonPath = function()
                    return '/usr/bin/python'
                end,
            },
        }

        -- adapters
        dap.adapters.python = {
            type = 'executable',
            command = '/root/.local/share/nvim/mason/packages/debugpy/venv/bin/python',
            args = { '-m', 'debugpy.adapter' },
            --args = { '-m', 'debugpy.adapter' },
        }

        -- setup dapui
        local dapui = require("dapui")
        dapui.setup()

        dap.listeners.before.attach.dapui_config = function()
            dapui.open()
        end
        dap.listeners.before.launch.dapui_config = function()
            dapui.open()
        end
        dap.listeners.before.event_terminated.dapui_config = function()
            dapui.close()
        end
        dap.listeners.before.event_exited.dapui_config = function()
            dapui.close()
        end

        -- setup dap virtual text
        require("nvim-dap-virtual-text").setup {
            enabled = true,                     -- enable this plugin (the default)
            enabled_commands = true,            -- create commands DapVirtualTextEnable, DapVirtualTextDisable, DapVirtualTextToggle, (DapVirtualTextForceRefresh for refreshing when debug adapter did not notify its termination)
            highlight_changed_variables = true, -- highlight changed values with NvimDapVirtualTextChanged, else always NvimDapVirtualText
            highlight_new_as_changed = false,   -- highlight new variables in the same way as changed variables (if highlight_changed_variables)
            show_stop_reason = true,            -- show stop reason when stopped for exceptions
            commented = false,                  -- prefix virtual text with comment string
            only_first_definition = true,       -- only show virtual text at first definition (if there are multiple)
            all_references = false,             -- show virtual text on all all references of the variable (not only definitions)
            clear_on_continue = false,          -- clear virtual text on "continue" (might cause flickering when stepping)
            --- A callback that determines how a variable is displayed or whether it should be omitted
            --- @param variable Variable https://microsoft.github.io/debug-adapter-protocol/specification#Types_Variable
            --- @param buf number
            --- @param stackframe dap.StackFrame https://microsoft.github.io/debug-adapter-protocol/specification#Types_StackFrame
            --- @param node userdata tree-sitter node identified as variable definition of reference (see `:h tsnode`)
            --- @param options nvim_dap_virtual_text_options Current options for nvim-dap-virtual-text
            --- @return string|nil A text how the virtual text should be displayed or nil, if this variable shouldn't be displayed
            display_callback = function(variable, buf, stackframe, node, options)
                if options.virt_text_pos == 'inline' then
                    return ' = ' .. variable.value
                else
                    return variable.name .. ' = ' .. variable.value
                end
            end,
            -- position of virtual text, see `:h nvim_buf_set_extmark()`, default tries to inline the virtual text. Use 'eol' to set to end of line
            virt_text_pos = vim.fn.has 'nvim-0.10' == 1 and 'inline' or 'eol',

            -- experimental features:
            all_frames = false,     -- show virtual text for all stack frames not only current. Only works for debugpy on my machine.
            virt_lines = false,     -- show virtual lines instead of virtual text (will flicker!)
            virt_text_win_col = nil -- position the virtual text at a fixed window column (starting from the first text column) ,
            -- e.g. 80 to position at column 80, see `:h nvim_buf_set_extmark()`
        }
    end
}