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dape.el
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;;; dape.el --- Debug Adapter Protocol for Emacs -*- lexical-binding: t -*-
;; Copyright (C) 2023-2025 Free Software Foundation, Inc.
;; Author: Daniel Pettersson
;; Maintainer: Daniel Pettersson <[email protected]>
;; Created: 2023
;; License: GPL-3.0-or-later
;; Version: 0.22.0
;; Homepage: https://github.com/svaante/dape
;; Package-Requires: ((emacs "29.1") (jsonrpc "1.0.25"))
;; This file is not part of GNU Emacs.
;; This program is free software: you can redistribute it and/or modify
;; it under the terms of the GNU General Public License as published by
;; the Free Software Foundation, either version 3 of the License, or
;; (at your option) any later version.
;; This program is distributed in the hope that it will be useful,
;; but WITHOUT ANY WARRANTY; without even the implied warranty of
;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
;; GNU General Public License for more details.
;; You should have received a copy of the GNU General Public License
;; along with this program. If not, see <http://www.gnu.org/licenses/>.
;;; Commentary:
;; Dape is a debug adapter client for Emacs. The debug adapter
;; protocol, much like its more well-known counterpart, the language
;; server protocol, aims to establish a common API for programming
;; tools. However, instead of functionalities such as code
;; completions, it provides a standardized interface for debuggers.
;; To begin a debugging session, invoke the `dape' command. In the
;; minibuffer prompt, enter a debug adapter configuration name from
;; `dape-configs'.
;; For complete functionality, make sure to enable `eldoc-mode' in your
;; source buffers and `repeat-mode' for more pleasant key mappings.
;; Package looks is heavily inspired by gdb-mi.el
;;; Code:
(require 'cl-lib)
(require 'subr-x)
(require 'seq)
(require 'font-lock)
(require 'pulse)
(require 'comint)
(require 'repeat)
(require 'compile)
(require 'project)
(require 'gdb-mi)
(require 'hexl)
(require 'tramp)
(require 'jsonrpc)
;;; Custom
(defgroup dape nil
"Debug Adapter Protocol for Emacs."
:prefix "dape-"
:group 'applications)
(defcustom dape-adapter-dir
(file-name-as-directory (concat user-emacs-directory "debug-adapters"))
"Directory to store downloaded adapters in."
:type 'string)
(defcustom dape-configs
`((attach
modes nil
ensure (lambda (config)
(unless (plist-get config 'port)
(user-error "Missing `port' property")))
host "localhost"
:request "attach")
(launch
modes nil
command-cwd dape-command-cwd
ensure (lambda (config)
(unless (plist-get config 'command)
(user-error "Missing `command' property")))
:request "launch")
,(let* ((extension-directory
(expand-file-name
(file-name-concat dape-adapter-dir "bash-debug" "extension")))
(bashdb-dir (file-name-concat extension-directory "bashdb_dir")))
`(bash-debug
modes (sh-mode bash-ts-mode)
ensure (lambda (config)
(dape-ensure-command config)
(let ((dap-debug-server-path
(car (plist-get config 'command-args))))
(unless (file-exists-p dap-debug-server-path)
(user-error "File %S does not exist" dap-debug-server-path))))
command "node"
command-args (,(file-name-concat extension-directory "out" "bashDebug.js"))
fn (lambda (config)
(thread-first config
(plist-put :pathBashdbLib ,bashdb-dir)
(plist-put :pathBashdb (file-name-concat ,bashdb-dir "bashdb"))
(plist-put :env `(:BASHDB_HOME ,,bashdb-dir . ,(plist-get config :env)))))
:type "bashdb"
:cwd dape-cwd
:program dape-buffer-default
:args []
:pathBash "bash"
:pathCat "cat"
:pathMkfifo "mkfifo"
:pathPkill "pkill"))
,@(let ((codelldb
`( ensure dape-ensure-command
command-cwd dape-command-cwd
command ,(file-name-concat dape-adapter-dir
"codelldb"
"extension"
"adapter"
"codelldb")
port :autoport
:type "lldb"
:request "launch"
:cwd "."))
(common `(:args [] :stopOnEntry nil)))
`((codelldb-cc
modes (c-mode c-ts-mode c++-mode c++-ts-mode)
command-args ("--port" :autoport)
,@codelldb
:program "a.out"
,@common)
(codelldb-rust
modes (rust-mode rust-ts-mode)
command-args ("--port" :autoport
"--settings" "{\"sourceLanguages\":[\"rust\"]}")
,@codelldb
:program (file-name-concat "target" "debug"
(car (last (file-name-split
(directory-file-name (dape-cwd))))))
,@common)))
(cpptools
modes (c-mode c-ts-mode c++-mode c++-ts-mode)
ensure dape-ensure-command
command-cwd dape-command-cwd
command ,(file-name-concat dape-adapter-dir
"cpptools"
"extension"
"debugAdapters"
"bin"
"OpenDebugAD7")
fn (lambda (config)
;; For MI=GDB the :program path need to be absolute
(let ((program (plist-get config :program)))
(if (file-name-absolute-p program)
config
(thread-last (tramp-file-local-name (dape--guess-root config))
(expand-file-name program)
(plist-put config :program)))))
:type "cppdbg"
:request "launch"
:cwd "."
:program "a.out"
:MIMode ,(seq-find 'executable-find '("lldb" "gdb")))
,@(let ((debugpy
`( modes (python-mode python-ts-mode)
ensure (lambda (config)
(dape-ensure-command config)
(let ((python (dape-config-get config 'command)))
(unless (zerop
(call-process-shell-command
(format "%s -c \"import debugpy.adapter\"" python)))
(user-error "%s module debugpy is not installed" python))))
command "python"
command-args ("-m" "debugpy.adapter" "--host" "0.0.0.0" "--port" :autoport)
port :autoport
:request "launch"
:type "python"
:cwd dape-cwd))
(common
`( :args []
:justMyCode nil
:console "integratedTerminal"
:showReturnValue t
:stopOnEntry nil)))
`((debugpy ,@debugpy
:program dape-buffer-default
,@common)
(debugpy-module ,@debugpy
:module (car (last (file-name-split
(directory-file-name default-directory))))
,@common)))
(dlv
modes (go-mode go-ts-mode)
ensure dape-ensure-command
command "dlv"
command-args ("dap" "--listen" "127.0.0.1::autoport")
command-cwd dape-command-cwd
command-insert-stderr t
port :autoport
:request "launch"
:type "debug"
:cwd "."
:program ".")
(flutter
ensure dape-ensure-command
modes (dart-mode)
command "flutter"
command-args ("debug_adapter")
command-cwd dape-command-cwd
:type "dart"
:cwd "."
:program "lib/main.dart"
:toolArgs ["-d" "all"])
(gdb
ensure (lambda (config)
(dape-ensure-command config)
(let* ((default-directory
(or (dape-config-get config 'command-cwd)
default-directory))
(command (dape-config-get config 'command))
(output (shell-command-to-string (format "%s --version" command)))
(version (save-match-data
(when (string-match "GNU gdb \\(?:(.*) \\)?\\([0-9.]+\\)" output)
(string-to-number (match-string 1 output))))))
(unless (>= version 14.1)
(user-error "Requires gdb version >= 14.1"))))
modes (c-mode c-ts-mode c++-mode c++-ts-mode)
command-cwd dape-command-cwd
command "gdb"
command-args ("--interpreter=dap")
:request "launch"
:program "a.out"
:args []
:stopAtBeginningOfMainSubprogram nil)
(godot
modes (gdscript-mode)
port 6006
:request "launch"
:type "server")
,@(let ((js-debug
`( ensure ,(lambda (config)
(dape-ensure-command config)
(when-let ((runtime-executable
(dape-config-get config :runtimeExecutable)))
(dape--ensure-executable runtime-executable))
(let ((dap-debug-server-path
(car (plist-get config 'command-args))))
(unless (file-exists-p dap-debug-server-path)
(user-error "File %S does not exist" dap-debug-server-path))))
command "node"
command-args (,(expand-file-name
(file-name-concat dape-adapter-dir
"js-debug"
"src"
"dapDebugServer.js"))
:autoport)
port :autoport)))
`((js-debug-node
modes (js-mode js-ts-mode)
,@js-debug
:type "pwa-node"
:cwd dape-cwd
:program dape-buffer-default
:console "internalConsole")
(js-debug-ts-node
modes (typescript-mode typescript-ts-mode)
,@js-debug
:type "pwa-node"
:runtimeExecutable "ts-node"
:cwd dape-cwd
:program dape-buffer-default
:console "internalConsole")
(js-debug-node-attach
modes (js-mode js-ts-mode typescript-mode typescript-ts-mode)
,@js-debug
:type "pwa-node"
:request "attach"
:port 9229)
(js-debug-chrome
modes (js-mode js-ts-mode typescript-mode typescript-ts-mode)
,@js-debug
:type "pwa-chrome"
:url "http://localhost:3000"
:webRoot dape-cwd)))
,@(let ((lldb-common
`( modes ( c-mode c-ts-mode
c++-mode c++-ts-mode
rust-mode rust-ts-mode rustic-mode)
ensure dape-ensure-command
command-cwd dape-command-cwd
:cwd "."
:program "a.out")))
`((lldb-vscode
command "lldb-vscode"
:type "lldb-vscode"
,@lldb-common)
(lldb-dap
command "lldb-dap"
:type "lldb-dap"
,@lldb-common)))
(netcoredbg
modes (csharp-mode csharp-ts-mode)
ensure dape-ensure-command
command "netcoredbg"
command-args ["--interpreter=vscode"]
:request "launch"
:cwd dape-cwd
:program (if-let ((dlls
(file-expand-wildcards
(file-name-concat "bin" "Debug" "*" "*.dll"))))
(file-relative-name (file-relative-name (car dlls)))
".dll")
:stopAtEntry nil)
(ocamlearlybird
ensure dape-ensure-command
modes (tuareg-mode caml-mode)
command "ocamlearlybird"
command-args ("debug")
:type "ocaml"
:program (file-name-concat (dape-cwd) "_build" "default" "bin"
(concat (file-name-base (dape-buffer-default)) ".bc"))
:console "internalConsole"
:stopOnEntry nil
:arguments [])
(rdbg
modes (ruby-mode ruby-ts-mode)
ensure dape-ensure-command
command "rdbg"
command-args ("-O" "--host" "0.0.0.0" "--port" :autoport "-c" "--" :-c)
fn (lambda (config)
(plist-put config 'command-args
(mapcar (lambda (arg)
(if (eq arg :-c) (plist-get config '-c) arg))
(plist-get config 'command-args))))
port :autoport
command-cwd dape-command-cwd
:type "Ruby"
;; -- examples:
;; rails server
;; bundle exec ruby foo.rb
;; bundle exec rake test
-c (concat "ruby " (dape-buffer-default)))
(jdtls
modes (java-mode java-ts-mode)
ensure (lambda (config)
(let ((file (dape-config-get config :filePath)))
(unless (and (stringp file) (file-exists-p file))
(user-error "Unable to locate :filePath `%s'" file))
(with-current-buffer (find-file-noselect file)
(unless (and (featurep 'eglot) (eglot-current-server))
(user-error "No eglot instance active in buffer %s" (current-buffer)))
(unless (seq-contains-p (eglot--server-capable :executeCommandProvider :commands)
"vscode.java.resolveClasspath")
(user-error "Jdtls instance does not bundle java-debug-server, please install")))))
fn (lambda (config)
(with-current-buffer
(find-file-noselect (dape-config-get config :filePath))
(if-let ((server (eglot-current-server)))
(pcase-let ((`[,module-paths ,class-paths]
(eglot-execute-command server
"vscode.java.resolveClasspath"
(vector (plist-get config :mainClass)
(plist-get config :projectName))))
(port (eglot-execute-command server
"vscode.java.startDebugSession" nil)))
(thread-first config
(plist-put 'port port)
(plist-put :modulePaths module-paths)
(plist-put :classPaths class-paths)))
server)))
,@(cl-flet ((resolve-main-class (key)
(ignore-errors
(let* ((main-classes
(with-no-warnings
(eglot-execute-command
(eglot-current-server)
"vscode.java.resolveMainClass"
(file-name-nondirectory
(directory-file-name (dape-cwd))))))
(main-class
(or (seq-find (lambda(val)
(equal (plist-get val :filePath)
(buffer-file-name)))
main-classes)
(aref main-classes 0))))
(plist-get main-class key)))))
`(:filePath
,(lambda ()
(or (resolve-main-class :filePath)
(expand-file-name (dape-buffer-default) (dape-cwd))))
:mainClass
,(lambda () (resolve-main-class :mainClass))
:projectName
,(lambda () (resolve-main-class :projectName))))
:args ""
:stopOnEntry nil
:type "java"
:request "launch"
:vmArgs " -XX:+ShowCodeDetailsInExceptionMessages"
:console "integratedConsole"
:internalConsoleOptions "neverOpen")
(xdebug
modes (php-mode php-ts-mode)
ensure (lambda (config)
(dape-ensure-command config)
(let ((dap-debug-server-path
(car (plist-get config 'command-args))))
(unless (file-exists-p dap-debug-server-path)
(user-error "File %S does not exist" dap-debug-server-path))))
command "node"
command-args (,(expand-file-name
(file-name-concat dape-adapter-dir
"php-debug"
"extension"
"out"
"phpDebug.js")))
:type "php"
:port 9003))
"This variable holds the dape configurations as an alist.
In this alist, the car element serves as a symbol identifying each
configuration. Each configuration, in turn, is a property list (plist)
where keys can be symbols or keywords.
Symbol keys (Used by dape):
- fn: Function or list of functions, takes config and returns config.
If list functions are applied in order.
See `dape-default-config-functions'.
- ensure: Function to ensure that adapter is available.
- command: Shell command to initiate the debug adapter.
- command-args: List of string arguments for the command.
- command-cwd: Working directory for the command, if not supplied
`default-directory' will be used.
- command-env: Property list (plist) of environment variables to
set when running the command. Keys can be strings, symbols or
keywords.
- command-insert-stderr: If non nil treat stderr from adapter as
stderr output from debugged program.
- prefix-local: Path prefix for Emacs file access.
- prefix-remote: Path prefix for debugger file access.
- host: Host of the debug adapter.
- port: Port of the debug adapter.
- modes: List of modes where the configuration is active in `dape'
completions.
- compile: Executes a shell command with `dape-compile-function'.
- defer-launch-attach: If launch/attach request should be sent
after initialize or configurationDone. If nil launch/attach are
sent after initialize request else it's sent after
configurationDone. This key exist to accommodate the two different
interpretations of the DAP specification.
See: GDB bug 32090.
Note: The char - carries special meaning when reading options in
`dape' and therefore should not be used be used as an key.
See `dape-history-add'.
Connection to Debug Adapter:
- If command is specified and not port, dape communicates with the
debug adapter through stdin/stdout.
- If host and port are specified, dape connects to the debug adapter.
If command is specified, dape waits until the command initializes
before connecting to host and port.
Keywords in configuration:
Keywords (symbols starting with colon) are transmitted to the
adapter during the initialize and launch/attach requests. Refer to
`json-serialize' for detailed information on how dape serializes
these keyword elements. Dape uses nil as false.
Functions and symbols:
- If a value is a function, its return value replaces the key's
value before execution. The function is called with no arguments.
- If a value is a symbol, it resolves recursively before execution."
:type '(alist :key-type (symbol :tag "Name")
:value-type
(plist :options
(((const :tag "List of modes where config is active in `dape' completions" modes) (repeat function))
((const :tag "Ensures adapter availability" ensure) function)
((const :tag "Transforms configuration at runtime" fn) (choice function (repeat function)))
((const :tag "Shell command to initiate the debug adapter" command) (choice string symbol))
((const :tag "List of string arguments for command" command-args) (repeat string))
((const :tag "List of environment variables to set when running the command" command-env)
(plist :key-type (restricted-sexp :match-alternatives (stringp symbolp keywordp) :tag "Variable")
:value-type (string :tag "Value")))
((const :tag "Treat stderr from adapter as program output" command-insert-stderr) boolean)
((const :tag "Working directory for command" command-cwd) (choice string symbol))
((const :tag "Path prefix for Emacs file access" prefix-local) string)
((const :tag "Path prefix for debugger file access" prefix-remote) string)
((const :tag "Host of debug adapter" host) string)
((const :tag "Port of debug adapter" port) natnum)
((const :tag "Compile cmd" compile) string)
((const :tag "Use configurationDone as trigger for launch/attach" defer-launch-attach) boolean)
((const :tag "Adapter type" :type) string)
((const :tag "Request type launch/attach" :request) string)))))
(defcustom dape-default-config-functions
'(dape-config-autoport dape-config-tramp)
"Functions applied on config before starting debugging session.
Each function is called with one argument CONFIG and should return an
PLIST of the format specified in `dape-configs'.
Functions are evaluated after functions defined in fn symbol in `dape-configs'.
See fn in `dape-configs' function signature."
:type '(repeat function))
(defcustom dape-command nil
"Initial contents for `dape' completion.
Sometimes it is useful for files or directories to supply local values
for this variable.
Example value:
\(launch :program \"a.out\")"
:type 'sexp)
;;;###autoload(put 'dape-command 'safe-local-variable #'listp)
(defcustom dape-key-prefix "\C-x\C-a"
"Prefix of all dape commands."
:type 'key-sequence)
(define-obsolete-variable-alias 'dape-buffer-window-arrangment 'dape-buffer-window-arrangement "0.3.0")
(defcustom dape-buffer-window-arrangement 'left
"Rules for display dape buffers."
:type '(choice (const :tag "GUD gdb like" gud)
(const :tag "Left side" left)
(const :tag "Right side" right)
(const :tag "Use `display-buffer-base-action'" nil)))
(defcustom dape-variable-auto-expand-alist '((hover . 1) (repl . 1) (watch . 1))
"Default expansion depth for displaying variables.
Each entry consists of a context (such as `hover', `repl', or
`watch') paired with a number indicating how many levels deep the
variable should be expanded by default."
:type '(alist :key-type
(choice (natnum :tag "Scope number (Locals 0 etc.)")
(const :tag "Eldoc hover" hover)
(const :tag "In repl buffer" repl)
(const :tag "In watch buffer" watch)
(const :tag "All contexts" nil))
:value-type (natnum :tag "Levels expanded")))
(defcustom dape-stepping-granularity 'line
"The granularity of one step in the stepping requests."
:type '(choice (const :tag "Step statement" statement)
(const :tag "Step line" line)
(const :tag "Step instruction" instruction)))
(defcustom dape-stack-trace-levels 20
"The number of stack frames fetched."
:type 'natnum)
(defcustom dape-display-source-buffer-action
`((display-buffer-reuse-window
display-buffer-reuse-mode-window
display-buffer-use-some-window))
"`display-buffer' action used when displaying source buffer."
:type 'sexp)
(define-obsolete-variable-alias 'dape-on-start-hooks 'dape-start-hook "0.13.0")
(defcustom dape-start-hook '(dape-repl dape-info)
"Called when session starts."
:type 'hook)
(define-obsolete-variable-alias 'dape-on-stopped-hooks 'dape-stopped-hook "0.13.0")
(defcustom dape-stopped-hook '(dape-memory-revert dape--emacs-grab-focus)
"Called when session stopped."
:type 'hook)
(define-obsolete-variable-alias 'dape-update-ui-hooks 'dape-update-ui-hook "0.13.0")
(defcustom dape-update-ui-hook '(dape-info-update)
"Called when it's sensible to refresh UI."
:type 'hook)
(defcustom dape-display-source-hook '()
"Called in buffer when placing overlay arrow for stack frame."
:type 'hook)
(defcustom dape-mime-mode-alist '(("text/x-lldb.disassembly" . asm-mode)
("text/javascript" . js-mode))
"Alist of MIME types vs corresponding major mode functions.
Each element should look like (MIME-TYPE . MODE) where MIME-TYPE is
a string and MODE is the major mode function to use for buffers of
this MIME type."
:type '(alist :key-type string :value-type function))
(define-obsolete-variable-alias 'dape-read-memory-default-count 'dape-memory-page-size "0.8.0")
(defcustom dape-memory-page-size 1024
"The bytes read with `dape-read-memory'."
:type 'natnum)
(defcustom dape-info-buffer-window-groups
'((dape-info-scope-mode dape-info-watch-mode)
(dape-info-stack-mode dape-info-modules-mode dape-info-sources-mode)
(dape-info-breakpoints-mode dape-info-threads-mode))
"Window grouping rules for `dape-info' buffers.
Each list of MODEs is displayed in the same window. The first item of
each group is displayed by `dape-info'. MODE can also be
\(`dape-info-scope-mode' INDEX), displaying scope at INDEX.
All modes need not to be present in an group."
:type '(repeat (repeat (choice
(function :tag "Info mode")
(list :tag "Scope index" (const dape-info-scope-mode)
(natnum :tag "Index"))))))
(defcustom dape-info-hide-mode-line
(and (memql dape-buffer-window-arrangement '(left right)) t)
"Hide mode line in dape info buffers."
:type 'boolean)
(defcustom dape-info-variable-table-aligned nil
"Align columns in variable tables."
:type 'boolean)
(defcustom dape-info-variable-table-row-config
`((name . 0) (value . 0) (type . 0))
"Configuration for table rows of variables.
An ALIST that controls the display of the name, type and value of
variables. The key controls which column to change whereas the
value determines the maximum number of characters to display in each
column. A value of 0 means there is no limit.
Additionally, the order the element in the ALIST determines the
left-to-right display order of the properties."
:type '(alist :key-type symbol :value-type integer))
(defcustom dape-info-thread-buffer-locations t
"Show file information or library names in threads buffer."
:type 'boolean)
(defcustom dape-info-thread-buffer-addresses t
"Show addresses for thread frames in threads buffer."
:type 'boolean)
(defcustom dape-info-stack-buffer-locations t
"Show file information or library names in stack buffer."
:type 'boolean)
(defcustom dape-info-stack-buffer-modules nil
"Show module information in stack buffer if adapter supports it."
:type 'boolean)
(defcustom dape-info-stack-buffer-addresses t
"Show frame addresses in stack buffer."
:type 'boolean)
(defcustom dape-info-file-name-max 25
"Max length of file name in dape info buffers."
:type 'integer)
(defcustom dape-repl-echo-shell-output nil
"Echo dape shell output in repl."
:type 'boolean)
(defcustom dape-repl-use-shorthand t
"Dape `dape-repl-commands' can be invoked with first char of command."
:type 'boolean)
(defcustom dape-repl-commands
'(("debug" . dape)
("next" . dape-next)
("continue" . dape-continue)
("pause" . dape-pause)
("step" . dape-step-in)
("out" . dape-step-out)
("up" . dape-stack-select-up)
("down" . dape-stack-select-down)
("threads" . dape-repl-threads)
("stack" . dape-repl-stack)
("modules" . dape-repl-modules)
("sources" . dape-repl-sources)
("breakpoints" . dape-repl-breakpoints)
("scope" . dape-repl-scope)
("watch" . dape-repl-watch)
("restart" . dape-restart)
("kill" . dape-kill)
("disconnect" . dape-disconnect-quit)
("quit" . dape-quit))
"Dape commands available in *dape-repl* buffer."
:type '(alist :key-type string :value-type function))
(defcustom dape-breakpoint-margin-string "B"
"String to display breakpoint in margin."
:type 'string)
(defcustom dape-default-breakpoints-file
(locate-user-emacs-file "dape-breakpoints")
"Default file for loading and saving breakpoints.
See `dape-breakpoint-load' and `dape-breakpoint-save'."
:type 'file)
(define-obsolete-variable-alias 'dape-compile-fn 'dape-compile-function "0.21.0")
(defcustom dape-compile-function #'compile
"Function to compile with.
The function is called with a command string."
:type 'function)
(define-obsolete-variable-alias 'dape-cwd-fn 'dape-cwd-function "0.21.0")
(defcustom dape-cwd-function #'dape--default-cwd
"Function to get current working directory.
The function should return a string representing the absolute
file path of the current working directory, usually the current
project's root. See `dape--default-cwd'."
:type 'function)
(define-obsolete-variable-alias 'dape-compile-compile-hooks 'dape-compile-hook "0.13.0")
(defcustom dape-compile-hook nil
"Called after dape compilation finishes.
The hook is run with one argument, the compilation buffer when
compilation is successful."
:type 'hook)
(defcustom dape-minibuffer-hint-ignore-properties
'( ensure fn modes command command-args command-env command-insert-stderr
defer-launch-attach :type :request)
"Properties to be hidden in `dape--minibuffer-hint'."
:type '(repeat symbol))
(defcustom dape-minibuffer-hint t
"Show `dape-configs' hints in minibuffer."
:type 'boolean)
(defcustom dape-history-add 'input
"How to push configuration options onto `dape-history'.
- input: Store input as is read from minibuffer.
- evaled: Input is evaluated then checked against base configuration
in `dape-configs'. Each options that differ from base are stored.
- dash-form: Like evaled but stores options in dash form if possible.
With dash form characters after - are interpret in sh like format
with ENV PROGRAM ARGS. This is useful for adapters which accepts
:env, :program and :args as launch options.
Example: \"launch - ENV=value program arg1 arg2\""
:type '(choice (const :tag "Input" input)
(const :tag "Evaluated input" evaled)
(const :tag "Evaluated input in dash form" evaled-dash-form)))
(defcustom dape-ui-debounce-time 0.1
"Number of seconds to debounce `revert-buffer' for UI buffers."
:type 'float)
(defcustom dape-request-timeout jsonrpc-default-request-timeout
"Number of seconds until a request is deemed to be timed out."
:type 'natnum)
(defcustom dape-debug nil
"If non nil log debug info in repl and connection events buffers.
Debug logging has an noticeable effect on performance."
:type 'boolean)
;;; Face
(defface dape-breakpoint-face '((t :inherit font-lock-keyword-face))
"Face used to display breakpoint overlays.")
(defface dape-log-face '((t :inherit font-lock-string-face
:height 0.85 :box (:line-width -1)))
"Face used to display log breakpoints.")
(defface dape-expression-face '((t :inherit dape-breakpoint-face
:height 0.85 :box (:line-width -1)))
"Face used to display conditional breakpoints.")
(defface dape-hits-face '((t :inherit font-lock-number-face
:height 0.85 :box (:line-width -1)))
"Face used to display hits breakpoints.")
(defface dape-exception-description-face '((t :inherit (error tooltip)
:extend t))
"Face used to display exception descriptions inline.")
(defface dape-source-line-face '((t))
"Face used to display stack frame source line overlays.")
(defface dape-repl-error-face '((t :inherit compilation-mode-line-fail
:extend t))
"Face used in repl for non 0 exit codes.")
;;; Forward declarations
(defvar hl-line-mode)
(defvar hl-line-sticky-flag)
(declare-function global-hl-line-highlight "hl-line" ())
(declare-function hl-line-highlight "hl-line" ())
;;; Vars
(defvar dape-history nil
"History variable for `dape'.")
;; FIXME `dape--source-buffers' should be moved into connection as
;; source references are not globally scoped.
(defvar dape--source-buffers nil
"Plist of sources reference to buffer.")
(defvar dape--breakpoints nil
"List of `dape--breakpoint's.")
(defvar dape--exceptions nil
"List of available exceptions as plists.")
(defvar dape--watched nil
"List of watched expressions.")
(defvar dape--data-breakpoints nil
"List of data breakpoints.")
(defvar dape--connection nil
"Debug adapter connection.")
(defvar dape--connection-selected nil
"Selected debug adapter connection.
If valid connection, this connection will be of highest priority when
querying for connections with `dape--live-connection'.")
(define-minor-mode dape-active-mode
"On when dape debugging session is active.
Non interactive global minor mode."
:global t
:interactive nil)
;;; Utils
(defun dape--warn (format &rest args)
"Display warning/error message with FORMAT and ARGS."
(dape--repl-insert-error (format "* %s *\n" (apply #'format format args))))
(defun dape--message (format &rest args)
"Display message with FORMAT and ARGS."
(dape--repl-insert (format "* %s *\n" (apply #'format format args))))
(defmacro dape--with-request-bind (vars fn-args &rest body)
"Call FN with ARGS and execute BODY on callback with VARS bound.
VARS are bound from the args that the callback was invoked with.
FN-ARGS is be an cons pair as FN . ARGS, where FN is expected to
take an function as an argument at ARGS + 1.
BODY is guaranteed to be evaluated with the current buffer if it's
still live.
See `cl-destructuring-bind' for bind forms."
(declare (indent 2))
(let ((old-buffer (make-symbol "old-buffer")))
`(let ((,old-buffer (current-buffer)))
(,(car fn-args) ,@(cdr fn-args)
(cl-function (lambda ,vars
(with-current-buffer (if (buffer-live-p ,old-buffer)
,old-buffer
(current-buffer))
,@body)))))))
(defmacro dape--with-request (fn-args &rest body)
"Call `dape-request' like FN with ARGS and execute BODY on callback.
FN-ARGS is be an cons pair as FN . ARGS.
BODY is guaranteed to be evaluated with the current buffer if it's
still live.
See `cl-destructuring-bind' for bind forms."
(declare (indent 1))
`(dape--with-request-bind (&rest _) ,fn-args ,@body))
(defun dape--request-continue (cb &optional error)
"Shorthand to call CB with ERROR in an `dape-request' like way."
(when (functionp cb)
(funcall cb nil error)))
(defun dape--call-with-debounce (timer backoff fn)
"Call FN with a debounce of BACKOFF seconds.
This function utilizes TIMER to store state. It cancels the TIMER
and schedules FN to run after current time + BACKOFF seconds.
If BACKOFF is non-zero, FN will be evaluated within timer context."
(cond
((zerop backoff)
(cancel-timer timer)
(funcall fn))
(t
(cancel-timer timer)
(timer-set-time timer (timer-relative-time nil backoff))
(timer-set-function timer fn)
(timer-activate timer))))
(defmacro dape--with-debounce (timer backoff &rest body)
"Eval BODY forms with a debounce of BACKOFF seconds using TIMER.
Helper macro for `dape--call-with-debounce'."
(declare (indent 2))
`(dape--call-with-debounce ,timer ,backoff (lambda () ,@body)))
(defmacro dape--with-line (buffer line &rest body)
"Save point, and current buffer; execute BODY on LINE in BUFFER."
(declare (indent 2))
`(with-current-buffer ,buffer
(save-excursion
(goto-char (point-min))
(forward-line (1- ,line))
,@body)))
(defun dape--next-like-command (conn command)
"Helper for interactive step like commands.
Run step like COMMAND on CONN. If ARG is set run COMMAND ARG times."
(if (not (dape--stopped-threads conn))
(user-error "No stopped threads")
(dape--with-request-bind
(_body error)
(dape-request conn
command
`(,@(dape--thread-id-object conn)
,@(when (dape--capable-p conn :supportsSteppingGranularity)
(list :granularity
(symbol-name dape-stepping-granularity)))))
(if error
(message "Failed to \"%s\": %s" command error)
;; From specification [continued] event:
;; A debug adapter is not expected to send this event in
;; response to a request that implies that execution
;; continues, e.g. launch or continue.
(dape-handle-event conn 'continued nil)))))
(defun dape--maybe-select-thread (conn thread-id force)
"Maybe set selected THREAD-ID and CONN.
If FORCE is non nil force thread selection.
If thread is selected, select CONN as well if no previously connection
has been selected or if current selected connection does not have any
stopped threads.
See `dape--connection-selected'."
(when (and thread-id (or force (not (dape--thread-id conn))))
(setf (dape--thread-id conn) thread-id)
(unless (and (member dape--connection-selected (dape--live-connections))
(dape--stopped-threads dape--connection-selected))
(setq dape--connection-selected conn))))
(defun dape--threads-make-update-handle (conn)
"Return an threads update update handle for CONN.
See `dape--threads-set-status'."
(setf (dape--threads-update-handle conn)
(1+ (dape--threads-update-handle conn))))
(defun dape--threads-set-status (conn thread-id all-threads status update-handle)
"Set string STATUS thread(s) for CONN.
If THREAD-ID is non nil set status for thread with :id equal to
THREAD-ID to STATUS.
If ALL-THREADS is non nil set status of all all threads to STATUS.
Ignore status update if UPDATE-HANDLE is not the last handle created
by `dape--threads-make-update-handle'."
(when (> update-handle (dape--threads-last-update-handle conn))
(setf (dape--threads-last-update-handle conn) update-handle)
(cond ((not status) nil)
(all-threads
(cl-loop for thread in (dape--threads conn)
do (plist-put thread :status status)))
(thread-id
(plist-put
(cl-find-if (lambda (thread)
(equal (plist-get thread :id) thread-id))
(dape--threads conn))
:status status)))))
(defun dape--thread-id-object (conn)
"Construct a thread id object for CONN."
(when-let ((thread-id (dape--thread-id conn)))
(list :threadId thread-id)))
(defun dape--stopped-threads (conn)
"List of stopped threads for CONN."
(when conn
(mapcan (lambda (thread)
(when (equal (plist-get thread :status) 'stopped)
(list thread)))
(dape--threads conn))))
(defun dape--current-thread (conn)
"Current thread plist for CONN."
(when conn
(cl-find-if (lambda (thread)
(eq (plist-get thread :id) (dape--thread-id conn)))
(dape--threads conn))))
(defun dape--path-1 (conn path format)
"Return translate absolute PATH in FORMAT from CONN config.
Accepted FORMAT values are local and remote.
See `dape-configs' symbols prefix-local prefix-remote."
(if-let* (;; Fallback to last connection
(config (dape--config (or conn dape--connection)))
;; If neither `prefix-local' or `prefix-remote' is set there is
;; no work to be done
((or (plist-member config 'prefix-local)
(plist-member config 'prefix-remote)))
(absolute-path
;; `command-cwd' is always set in `dape--launch-or-attach'
(let ((command-cwd (plist-get config 'command-cwd)))
(expand-file-name path
(pcase format
('local (tramp-file-local-name command-cwd))
('remote command-cwd)))))
(prefix-local (or (plist-get config 'prefix-local) ""))
(prefix-remote (or (plist-get config 'prefix-remote) ""))
(mapping (pcase format
('local (cons prefix-remote prefix-local))
('remote (cons prefix-local prefix-remote))
(_ (error "Unknown format"))))
;; Substitute prefix if there is an match or nil
((string-prefix-p (car mapping) absolute-path)))
(concat (cdr mapping)
(string-remove-prefix (car mapping) absolute-path))
path))
(defun dape--path-local (conn path)
"Return translate PATH to local format by CONN.