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dap.txt
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DAP client *dap.txt*
nvim-dap is a Debug Adapter Protocol client, or "debugger", or "debug-frontend".
With the help of a debug adapter it can:
- Launch an application to debug
- Attach to running applications to debug them
- Set breakpoints and step through code
- Inspect the state of the application
A debug adapter is a facilitator between nvim-dap (the client), and a
language-specific debugger:
DAP-Client ----- Debug Adapter ------- Debugger ------ Debugee
(nvim-dap) | (per language) | (per language) (your app)
| |
| Implementation specific communication
| Debug adapter and debugger could be the same process
|
Communication via the Debug Adapter Protocol
To debug applications, you need to configure two things per language:
- A debug adapter (|dap-adapter|).
- How to launch your application to debug or how to attach to a running
application (|dap-configuration|).
Available debug adapters:
https://microsoft.github.io/debug-adapter-protocol/implementors/adapters/
Debug adapter configuration and installation instructions:
https://github.com/mfussenegger/nvim-dap/wiki/Debug-Adapter-installation
Debug Adapter Protocol:
https://microsoft.github.io/debug-adapter-protocol/
Type |gO| to see the table of contents.
==============================================================================
ADAPTER CONFIGURATION *dap-adapter*
Neovim needs a debug adapter with which it can communicate. Neovim can either
launch the debug adapter itself, or it can attach to an existing one.
To tell Neovim if it should launch a debug adapter or connect to one, and if
so, how, you need to configure them via the `dap.adapters` table. The key of
the table is an arbitrary name that debug adapters are looked up by when using
a |dap-configuration|.
For example, to register the `debugpy` debug adapter under the type `python` you
can add the following entry:
>lua
local dap = require('dap')
dap.adapters.python = {
type = 'executable';
command = os.getenv('HOME') .. '/.virtualenvs/tools/bin/python';
args = { '-m', 'debugpy.adapter' };
}
<
`dap.adapters.<name>` is set to a `Adapter`.
The `Adapter` needs to contain a `type`, which can be one of:
- `executable`, to indicate that nvim-dap must launch the debug adapter. In
this case nvim-dap will spawn the given process and communicate with it using
stdio.
- `server`, to connect to a debug adapter via TCP.
The adapter must be running, or started with a debug session via a
`executable` configuration of the adapter. See the options further below.
- `pipe`, to connect to a debug adapter via a unix domain socket or named pipe.
The adapter must be running, or started with a debug session via a
`executable` configuration of the adapter. See the options further below.
For `executable` the following options are supported:
>
command: string -- command to invoke
args: string[] -- arguments for the command
options?: {
env?: {} -- Set the environment variables for the command
cwd?: string -- Set the working directory for the command
detached?: boolean -- Spawn the debug adapter process in a detached state.
Defaults to true.
}
id?: string -- Identifier of the adapter. This is used for the
`adapterId` property of the initialize request.
For most debug adapters setting this is not
necessary.
For `server` the following options are supported:
>
host?: string -- host to connect to, defaults to 127.0.0.1
port: number|"${port}" -- port to connect to.
-- If "${port}" nvim-dap resolves a free port.
-- This is intended to be used with
-- `executable.args` further below below
id?: string -- Identifier of the adapter. This is used for the
`adapterId` property of the initialize request.
For most debug adapters setting this is not
necessary.
-- nvim-dap can optionally launch the debug-adapter on each new debug session
-- And then connect via TCP.
--
executable?: {
command: string -- command that spawns the server
args?: string[] -- command arguments
-- ${port} used in the args is replaced with a
-- dynamically resolved free port number
detached?: boolean -- Spawn the debug adapter in detached mode.
-- Defaults to true.
cwd?: string -- Working directory
}
options?: {
max_retries?: number -- Amount of times the client should attempt to
-- connect before erroring out.
-- There is a 250ms delay between each retry
-- Defaults to 14 (3.5 seconds)
}
For `pipe` the following options are supported:
pipe: string -- Absolute path to the pipe file.
-- If `${pipe}` nvim-dap generates a temporary filename
-- that is intended for use with `executable`
-- nvim-dap can optionally launch the debug-adapter on each new debug session
-- And then connect to the socket or named pipe
executable?: {
command: string -- command that spawns the server
args?: string[] -- command arguments
-- ${pipe} used in the args is replaced with a
-- dynamically resolved temporary file
detached?: boolean -- Spawn the debug adapter in detached mode.
-- Defaults to true.
cwd?: string -- Working directory
}
options?: {
timeout?: integer -- Max amount of time in ms to wait between spawning
-- the executable and connecting to the pipe. This
-- gives the executable time to create the pipe.
-- Defaults to 5000ms
}
All types support the following additional options:
>
options?: {
initialize_timeout_sec?: number -- How many seconds the client waits for a
-- response on a initialize request before
-- emitting a warning. Defaults to 4
disconnect_timeout_sec?: number -- How many seconds the client waits for
-- a disconnect response from the debug
-- adapter before emitting a warning and
-- closing the connection. Defaults to 3
source_filetype?: string -- The filetype to use for content
-- retrieved via a source request.
`dap.adapters.<name>` can also be set to a function which takes three arguments:
- A `on_config` callback. This must be called with the actual adapter table.
- The |dap-configuration| which the user wants to use.
- An optional parent session. This is only available if the debug-adapter
wants to start a child-session via a `startDebugging` request.
This can be used to defer the resolving of the values to when a configuration
is used. A use-case for this is starting an adapter asynchronous. For example,
for java-debug:
>
>lua
dap.adapters.java = function(callback, config)
M.execute_command({command = 'vscode.java.startDebugSession'}, function(err0, port)
assert(not err0, vim.inspect(err0))
callback({ type = 'server'; host = '127.0.0.1'; port = port; })
end)
end
<
There is an additional `enrich_config` property available for both adapter
types. This property is a function which allows an adapter to enrich a
configuration with additional information. It receives a configuration as first
argument, and a callback that must be called with the final configuration as
second argument.
An example use-case of this is the Java Debug Adapter, which can resolve
classPaths or modulePaths dynamically, so that users don't have to do that.
>lua
local adapter = {
type = 'server';
host = '127.0.0.1';
port = 8080;
enrich_config = function(config, on_config)
local final_config = vim.deepcopy(config)
final_config.extra_property = 'This got injected by the adapter'
on_config(final_config)
end;
}
<
==============================================================================
DEBUGEE CONFIGURATION *dap-configuration*
In addition to launching (possibly) and connecting to a debug adapter, Neovim
needs to instruct the debug adapter itself how to launch and connect to the
debugee. The debugee is the application you want to debug.
This is controlled via a `Configuration`, which has 3 required fields:
>
type: string -- Which debug adapter to use.
request: string -- Either `attach` or `launch`. Indicates whether the
-- debug adapter should launch a debugee or attach to
-- one that is already running.
name: string -- A user-readable name for the configuration.
<
In addition, a `Configuration` accepts an arbitrary number of further options
which are debug-adapter-specific.
Configurations are set in the `dap.configurations` table. The keys are
filetypes. If you run |dap.continue()| it will look up configurations under the
current filetype.
For example:
>lua
local dap = require('dap')
dap.configurations.python = {
{
type = 'python';
request = 'launch';
name = "Launch file";
program = "${file}";
pythonPath = function()
return '/usr/bin/python'
end;
},
}
<
Things to note:
- Values for properties other than the 3 required properties `type`,
`request`, and `name` can be functions. If a value is given as a function,
the function will be evaluated to get the property value when the
configuration is used.
To support asynchronous operations, the function can return a `thread`
(created via `coroutine.create`) following two constraints:
- The coroutine/thread must be in a suspended state
- The coroutine/thread must resume the nvim-dap `run` coroutine with the
result
An example:
>lua
foo = function()
return coroutine.create(function(dap_run_co)
local items = {'one', 'two'}
vim.ui.select(items, { label = 'foo> '}, function(choice)
coroutine.resume(dap_run_co, choice)
end)
end)
end,
<
- Functions for top level properties can return the `dap.ABORT` constant to
signal that you want to abort starting a debug session. An example:
>lua
program = function()
local path = vim.fn.input({
prompt = 'Path to executable: ',
default = vim.fn.getcwd() .. '/',
completion = 'file'
})
return (path and path ~= "") and path or dap.ABORT
end
<
- The configuration can have an optional metatable with `__call`
implementation. The function will get called when the configuration is used
and it must return a new configuration table. This can be used to
dynamically add multiple properties at once.
- Some variables are supported:
- `${file}`: Active filename
- `${fileBasename}`: The current file's basename
- `${fileBasenameNoExtension}`: The current file's basename without extension
- `${fileDirname}`: The current file's dirname
- `${fileExtname}`: The current file's extension
- `${relativeFile}`: The current file relative to |getcwd()|
- `${relativeFileDirname}`: The current file's dirname relative to |getcwd()|
- `${workspaceFolder}`: The current working directory of Neovim
- `${workspaceFolderBasename}`: The name of the folder opened in Neovim
- `${command:pickProcess}`: Open dialog to pick process using |vim.ui.select|
- `${command:pickFile}`: Open dialog to pick file using |vim.ui.select|
- `${env:Name}`: Environment variable named `Name`, for example: `${env:HOME}`.
==============================================================================
DEBUGEE CONFIGURATION via launch.json *dap-launch.json*
nvim-dap supports a subset of the `launch.json` file format used to configure
debug adapters in Visual Studio Code.
To load a `launch.json` file, use the `load_launchjs` function from the
`dap.ext.vscode` module.
Unlike VS Code, nvim-dap supports standard JSON. Trailing commas on the
last item of a list are an error.
If you install a 3rd-party json5 parser you can override the json decode
function to support json5 features like trailing comma.
>
require('dap.ext.vscode').json_decode = require'json5'.parse
<
(One json5 parser implementation is https://github.com/Joakker/lua-json5)
load_launchjs({path}, {type_to_filetypes}) *dap.ext.vscode.load_launchjs*
Parses a JSON file at {path} and adds the entries to `dap.configurations`.
Configurations are overwritten by name, so if filetype and name matches a
configuration in `dap.configurations`, the config is overwritten by the
one loaded from the file at {path}.
Parameters:
{path} Path to the `launch.json` file. Defaults to
`.vscode/launch.json` in the current working directory.
{type_to_filetypes} A table mapping `type` values in `launch.json` to
one or more filetypes.
By default, the `type` values in `launch.json` will
be used as filetypes verbatim.
An example `launch.json` might look like this:
>json
{
"version": "0.2.0",
"configurations": [
{
"type": "java",
"request": "launch",
"name": "Launch Java"
},
{
"type": "cppdbg",
"request": "launch",
"name": "Launch CPP"
}
]
}
<
For the above configuration, calling `load_launchjs` adds the first entry to
`dap.configurations.java` and the second entry to `dap.configurations.cppdbg`.
If you wanted to add the second entry to the `c` or `cpp` configurations you
could call `load_launchjs` like this instead:
>
>lua
require('dap.ext.vscode').load_launchjs(nil, { cppdbg = {'c', 'cpp'} })
<
load_launchjs supports `inputs`. Inputs can be used to define custom input prompts.
They are declared in an "inputs" array and each input must have the following properties:
- "id": the identifier of an input
- "type": Either `pickString` or `promptString`
- "description": Descriptive text shown to the user
- "default": Default value (Defaults to '' if not provided)
`pickString` has an additional "options" property, which is an array of strings
or an array of option objects with label and value:
- [ "my value 1", "my value 2", "my value 3" ]
- [ { "label": "my label", "value", "my value"} ]
These are shown to the user as options.
Inputs can be referenced with `${input:<id>}` placeholders.
>json
{
"version": "0.2.0",
"configurations": [
{
"type": "python",
"request": "launch",
"name": "Launch",
"program": "${input:myPrompt}"
}
],
"inputs": [
{
"id": "myPrompt",
"type": "pickString",
"description": "Program to run: ",
"default": "foobar"
}
]
}
<
You can define system specific properties by placing them into a `linux`, `osx` or
`windows` sub-object. An example:
>json
{
"type": "cppdbg",
"request": "launch",
"name": "Launch CPP",
"linux": {
"MIMode": "gdb",
"miDebuggerPath": "/usr/bin/gdb"
},
"osx": {
"MIMode": "lldb",
"miDebuggerPath": "/usr/local/bin/lldb-mi"
},
"windows": {
"MIMode": "gdb",
"miDebuggerPath": "C:\\MinGw\\bin\\gdb.exe"
}
}
<
On `linux`, the final configuration will look like this:
>json
{
"type": "cppdbg",
"request": "launch",
"name": "Launch CPP",
"MIMode": "gdb",
"miDebuggerPath": "/usr/bin/gdb"
}
<
And on `windows` it will look like this:
>json
{
"type": "cppdbg",
"request": "launch",
"name": "Launch CPP",
"MIMode": "gdb",
"miDebuggerPath": "C:\\MinGw\\bin\\gdb.exe"
}
<
==============================================================================
SIGNS CONFIGURATION
nvim-dap uses five signs:
- `DapBreakpoint` for breakpoints (default: `B`)
- `DapBreakpointCondition` for conditional breakpoints (default: `C`)
- `DapLogPoint` for log points (default: `L`)
- `DapStopped` to indicate where the debugee is stopped (default: `→`)
- `DapBreakpointRejected` to indicate breakpoints rejected by the debug
adapter (default: `R`)
You can customize the signs by setting them with the |sign_define()| function.
For example:
>
>lua
vim.fn.sign_define('DapBreakpoint', {text='🛑', texthl='', linehl='', numhl=''})
<
==============================================================================
REPL COMPLETION *dap-completion*
nvim-dap includes an omnifunc implementation which uses the active debug
session to get completion candidates.
It is enabled by default in the REPL, which means you can use `CTRL-X CTRL-O`
to trigger completion within the REPL.
You can also configure completion to trigger automatically:
>vim
au FileType dap-repl lua require('dap.ext.autocompl').attach()
<
Completion will then trigger automatically on any of the completion trigger
characters reported by the debug adapter, or on `.` if none are reported.
==============================================================================
MAPPINGS *dap-mappings*
nvim-dap does not configure any mappings by default to avoid conflicts with
user defined keymaps.
Some example mappings you could configure:
>lua
vim.keymap.set('n', '<F5>', function() require('dap').continue() end)
vim.keymap.set('n', '<F10>', function() require('dap').step_over() end)
vim.keymap.set('n', '<F11>', function() require('dap').step_into() end)
vim.keymap.set('n', '<F12>', function() require('dap').step_out() end)
vim.keymap.set('n', '<Leader>b', function() require('dap').toggle_breakpoint() end)
vim.keymap.set('n', '<Leader>B', function() require('dap').set_breakpoint() end)
vim.keymap.set('n', '<Leader>lp', function() require('dap').set_breakpoint(nil, nil, vim.fn.input('Log point message: ')) end)
vim.keymap.set('n', '<Leader>dr', function() require('dap').repl.open() end)
vim.keymap.set('n', '<Leader>dl', function() require('dap').run_last() end)
vim.keymap.set({'n', 'v'}, '<Leader>dh', function()
require('dap.ui.widgets').hover()
end)
vim.keymap.set({'n', 'v'}, '<Leader>dp', function()
require('dap.ui.widgets').preview()
end)
vim.keymap.set('n', '<Leader>df', function()
local widgets = require('dap.ui.widgets')
widgets.centered_float(widgets.frames)
end)
vim.keymap.set('n', '<Leader>ds', function()
local widgets = require('dap.ui.widgets')
widgets.centered_float(widgets.scopes)
end)
<
==============================================================================
CLIENT CONFIGURATION *dap.defaults*
nvim-dap has a few client configuration options which you can either set
globally, or scoped to a specific "type" (from |dap-configuration|).
The configuration values are set via `dap.defaults.fallback` (for global) or
`dap.defaults.<type>`. The configuration options are:
- `stepping_granularity`: (string) The default stepping granularity to use when
stepping. Defaults to `statement`, can be `statement`, `line` or
`instructions`.
- `terminal_win_cmd`: (string|fun) The command used to create the window for
the integrated terminal. (See |dap-terminal|). Either a string or a function
that must return a buffer number and a window number of the buffer/window
for the terminal.
Note that extensions like `nvim-dap-ui` use this to control the UI.
If you customize it, you may break their behavior.
- `focus_terminal`: (boolean) If the integrated terminal should get focus when
its created. Defaults to false
- `auto_continue_if_many_stopped`. (boolean). Controls if a thread should
automatically resume on a stopped event if another thread is already
stopped. If your application uses multi-threading and you want multiple
threads to be able to stop, you may want to set this to false.
Defaults to true.
- switchbuf. (string). Controls the behavior when jumping to a breakpoint.
See |'switchbuf'|. Defaults to the global `'switchbuf'`
setting.
nvim-dap provides an additional `usevisible` option
that can be used to prevent jumps within the active
window if a stopped event is within the visible region.
Best used in combination with other options. For
example: 'usevisible,usetab,uselast'
- `on_output`. A function with two parameters: `session` and `output_event`:
Overrides the default output handling with a custom handler.
If you'd like to keep the default handling and still execute custom logic
for output events you can instead use the listener system. See |dap-extensions|.
See https://microsoft.github.io/debug-adapter-protocol/specification#Events_Output
for a description of the payload.
An example:
>lua
---@param session dap.Session
---@param output_event dap.OutputEvent
dap.defaults.fallback.on_output = function(session, output_event)
-- ignore all outputs
end
- `autostart`. Name of a configuration to start implicitly if evaluating an
expression in the REPL without active session.
<
Some more examples:
>lua
local dap = require('dap')
-- Use "tabnew" for all debug adapters
dap.defaults.fallback.terminal_win_cmd = 'tabnew'
-- Except for python
dap.defaults.python.terminal_win_cmd = 'belowright new'
dap.defaults.java.auto_continue_if_many_stopped = false
dap.defaults.fallback.autostart = "nluarepl"
<
==============================================================================
TERMINAL CONFIGURATION *dap-terminal*
Some debug adapters support launching the debugee in an integrated or external
terminal.
For that they usually provide a `console` option in their |dap-configuration|.
The supported values are sometimes called `internalConsole`,
`integratedTerminal` and `externalTerminal`, but you need to consult the debug
adapter documentation to figure out the concrete property name and values.
If you want to use the `externalTerminal` you need to setup the terminal which
should be launched by nvim-dap:
>lua
local dap = require('dap')
dap.defaults.fallback.external_terminal = {
command = '/usr/bin/alacritty';
args = {'-e'};
}
<
Some debug adapters support launching the debugee in a terminal, but don't
provide an option to choose between integrated terminal or external terminal.
`nvim-dap` provides an option to force the external terminal.
>lua
local dap = require('dap')
dap.defaults.fallback.force_external_terminal = true
<
If you're using the integrated terminal, you can configure the command
that is used to create a split window:
>lua
local dap = require('dap')
dap.defaults.fallback.terminal_win_cmd = '50vsplit new'
<
The `terminal_win_cmd` defaults to `belowright new`. The value can also be a
function which returns a buffer number and optionally a window ID.
Be default `dap` opens the integrated terminal but keeps focus on the current
buffer. If you rather have focus to be shifted to the terminal when it opens
you can configure:
>lua
local dap = require('dap')
dap.defaults.fallback.focus_terminal = true
<
`fallback` can be replaced with the |dap-adapter| type to have type
specific terminal configurations.
==============================================================================
API *dap-api*
Lua module: dap
continue({opts}) *dap.continue()*
`continue()` resumes the execution of an application [count] times if a
debug session is active and a thread was stopped. Threads are usually
stopped when a breakpoint is hit or an exception occurred.
If no debug session is active, `continue()` will start a new debug session by:
- Looking up the configurations (|dap-configuration|) for the current filetype.
- If there is more than one configuration it will prompt the user to
select one of them.
- It calls |dap.run()| on the selected configuration.
`continue()` is the main entry-point for users to start debugging an
application.
Parameters:
{opts} Optional table with:
- `new: boolean` force starting an additional debug session
run({config}, {opts}) *dap.run()*
Looks up a debug adapter entry for the given configuration and runs it.
This is implicitly called by |dap.continue()| if no debug session is
active.
Most users will want to start debugging using |dap.continue()| instead
of using `run()`. `run()` is intended for nvim-dap extensions which
create configurations dynamically, for example to debug individual test
cases.
If a debug session with the same name is already active, it will
restart the session.
Parameters:
{config} |dap-configuration| to run
{opts} Optional table with:
- `new: boolean` force starting an additional debug session
run_last() *dap.run_last()*
Re-runs the last debug adapter / configuration that ran using
|dap.run()|.
restart({config}) *dap.restart()*
Restart the current session.
Does nothing if there is no active session.
Parameters:
{config} |dap-configuration| to use. Defaults to the same
configuration used to start the current session.
terminate(opts), *dap.terminate()*
Terminates the debug session.
If the debug adapter doesn't support the `terminateRequest`
capability, this will instead call |dap.disconnect()| with
`terminateDebugee = true`.
If disconnect is used, the `terminateDebugee` and `suspendDebugee`
options will only take effect if the debug adapter has the
corresponding capabilities.
Parameters: ~
{opts} Table containing:
- `terminate_args`: table; used if terminate is supported:
- `restart: boolean?
- `disconnect_args`: table; used if terminate is not
supported:
- `restart`: `boolean?`
- `terminateDebugee`: `boolean?`
- `suspendDebugee`: `boolean?`
- `on_done`: function triggered once terminate or
disconnect completes
- `all`: `boolean`: flag indicating that all root sessions
should be terminated instead of only the currently
focused session. Defaults to false
- `hierarchy`: `boolean`: flag indicating that child and
parent sessions should be terminated. This will affect
the current focused session unless combined with `all`,
in that case it terminates all root sessions including
all their children.
set_breakpoint({condition}, {hit_condition}, {log_message})
*dap.set_breakpoint()*
Same as |toggle_breakpoint|, but is guaranteed to overwrite previous
breakpoint.
toggle_breakpoint({condition}, {hit_condition}, {log_message})
*dap.toggle_breakpoint()*
Creates or removes a breakpoint at the current line.
Parameters: ~
{condition} Optional condition that must be met for the debugger
to stop at the breakpoint.
{hit_condition} Optional hit condition, e.g. a number as a string
that tells how often this breakpoint should be visited
to stop.
{log_message} Optional log message. This transforms the breakpoint
into a log point. Variable interpolation with {foo} is
supported within the message.
list_breakpoints() *dap.list_breakpoints()*
Lists all breakpoints and log points in quickfix window.
clear_breakpoints() *dap.clear_breakpoints()*
Removes all breakpoints
set_exception_breakpoints({filters}, {exceptionOptions})
*dap.set_exception_breakpoints()*
Sets breakpoints on exceptions filtered by `filters`. If `filters` is not
provided it will prompt the user to choose from the available filters of the
debug adapter.
Parameters: ~
{filters} A list of exception types to stop on (optional).
Most debug adapters offer categories like `"uncaught"` and
`"raised"` to filter the exceptions.
If set to "default" instead of a table, the
default options as recommended by the debug adapter are
used.
{exceptionOptions} ExceptionOptions[]?
(https://microsoft.github.io/debug-adapter-protocol/specification#Types_ExceptionOptions)
>lua
-- Ask user to stop on which kinds of exceptions
require'dap'.set_exception_breakpoints()
-- don't stop on exceptions
require'dap'.set_exception_breakpoints({})
-- stop only on certain exceptions (debugpy offers "raised", "uncaught")
require'dap'.set_exception_breakpoints({"uncaughted"})
require'dap'.set_exception_breakpoints({"raised", "uncaught"})
-- use default settings of debug adapter
require'dap'.set_exception_breakpoints("default")
<
You can also set the default value via a `defaults.fallback` table:
>lua
require('dap').defaults.fallback.exception_breakpoints = {'raised'}
<
Or per config/adapter type:
>lua
require('dap').defaults.python.exception_breakpoints = {'raised'}
<
In this example `python` is the type. This is the same type used in
|dap-configuration| or the |dap-adapter| definition.
step_over([{opts}]) *dap.step_over()*
Requests the debugee to run again for [count] steps.
For {opts} see |step_into|.
step_into([{opts}]) *dap.step_into()*
Requests the debugee to step into a function or method if possible.
If it cannot step into a function or method it behaves like
|dap.step_over()|.
If the debug adapter has the `supportsStepInTargetsRequest` capability and
{askForTargets} is true, the user can choose into which function they
want to step into if there are multiple choices.
Some debug adapters allow a more fine-grained control over the
behavior of this command using the `steppingGranularity` {opts} parameter:
steppingGranularity:
Can be 'statement' | 'line' | 'instruction'
Will fall back to dap.defaults.fallback.stepping_granularity
Default: 'statement'
askForTargets:
Ask the user to step into which function if there are multiple choices.
Only for step_into.
step_out([{opts}]) *dap.step_out()*
Requests the debugee to step out of a function or method if possible.
For options see |step_into|.
step_back([{opts}] *dap.step_back()*
Steps one step back. Debug adapter must support reverse debugging.
For {opts} see |step_into|.
pause({thread_id}) *dap.pause()*
Requests debug adapter to pause a thread. If there are multiple threads
it stops `thread_id` from the optional parameter or asks the user which
thread to pause.
reverse_continue() *dap.reverse_continue()*
Continues execution reverse in time until last breakpoint.
Debug adapter must support reverse debugging.
up() *dap.up()*
Go up in current stacktrace without stepping.
down() *dap.down()*
Go down in current stacktrace without stepping.
goto_({line}) *dap.goto_()*
Let the debugger jump to a specific line or line under cursor.
This is an optional feature and not all debug adapters support it.
The code between the current location and the goto target is not
executed but skipped.
Parameters: ~
{line} Line number or line under cursor if nil.
focus_frame() *dap.focus_frame()*
Jump/focus the current frame.
Which window to use depends on the `switchbuf` setting. See
|dap.defaults|.
A current frame is set when breakpoints are hit or when traversing
the stack using |dap.up()|, |dap.down()| or the threads and frames
widgets. See |dap-widgets|.
This is a no-op if there is no active session.
If there is a session active but no current frame it opens the threads
widget to allow pausing threads and picking a frame to focus.
restart_frame() *dap.restart_frame()*
Restart execution of the current frame
This is an optional feature and not all debug adapters support it.
run_to_cursor() *dap.run_to_cursor()*
Continues execution to the current cursor.
This temporarily removes all breakpoints, sets a breakpoint at the
cursor, resumes execution and then adds back all breakpoints again.
repl.open({winopts}, {wincmd}) *dap.repl.open()*
Open a REPL / Debug-console.
Parameters: ~
{winopts} optional table which may include:
`height` to set the window height
`width` to set the window width
Any other key/value pair, that will be treated as window
option.
{wincmd} command that is used to create the window for
the REPL. Defaults to 'belowright split'
The REPL can be used to evaluate expressions. A `omnifunc` is set to
support completion of expressions. It supports the following special
commands:
.exit Closes the REPL
.c or .continue Same as |dap.continue|
.n or .next Same as |dap.step_over|
.into Same as |dap.step_into|
.into_target Same as |dap.step_into{askForTargets=true}|
.out Same as |dap.step_out|
.up Same as |dap.up|
.down Same as |dap.down|
.goto Same as |dap.goto_|
.scopes Prints the variables in the current scopes
.threads Prints all threads
.frames Print the stack frames
.capabilities Print the capabilities of the debug adapter
.b or .back Same as |dap.step_back|
.rc or
.reverse-continue Same as |dap.reverse_continue|
You can customize the builtin command names or define your own
custom commands by extending `dap.repl.commands`:
>lua
local repl = require 'dap.repl'
repl.commands = vim.tbl_extend('force', repl.commands, {
-- Add a new alias for the existing .exit command
exit = {'exit', '.exit', '.bye'},
-- Add your own commands; run `.echo hello world` to invoke
-- this function with the text "hello world"
custom_commands = {
['.echo'] = function(text)
dap.repl.append(text)
end,
-- Hook up a new command to an existing dap function
['.restart'] = dap.restart,
},
}
<
repl.toggle({winopts}, {wincmd}) *dap.repl.toggle()*