263 lines
9.6 KiB
EmacsLisp
263 lines
9.6 KiB
EmacsLisp
;;; gudap.el --- Debug Adapter Protocol client for Emacs -*- lexical-binding: t -*-
|
|
|
|
;; Author: Dominik Martinez <dominikmartinez@pm.me>
|
|
;; URL:
|
|
;; Version: 0.1.0
|
|
;; Package-Requires:
|
|
;; Keywords: languages, debug, dap
|
|
|
|
;; 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 <https://www.gnu.org/licenses/>.
|
|
|
|
;;; Commentary:
|
|
|
|
;; gudap.el is a Debug Adapter Protocol client for Emacs.
|
|
;;
|
|
;; To use, add the following to your init file:
|
|
;;
|
|
;; (require 'gudap)
|
|
;;
|
|
;; Code ~heavily~ adapted from Eglot.
|
|
|
|
;;; Code:
|
|
|
|
(require 'eglot)
|
|
(require 'jsonrpc)
|
|
(require 'gud)
|
|
|
|
(defgroup gudap nil
|
|
"Interaction with Debug Adapter Protocol servers."
|
|
:prefix "gudap-"
|
|
:group 'applications)
|
|
|
|
(defclass gudap-connection ()
|
|
((name
|
|
:initarg :name)
|
|
(-process
|
|
:initarg :process
|
|
:accessor gudap--process)
|
|
(-expected-bytes
|
|
:accessor gudap--expected-bytes)
|
|
(-sent-requests
|
|
:initform (make-hash-table)
|
|
:accessor gudap--sent-requests) ;; seq to request command
|
|
(gud-buffer
|
|
:initarg :gud-buffer
|
|
:accessor gudap-gud-buffer)
|
|
(next-seq
|
|
:initform 0
|
|
:accessor gudap--next-seq)))
|
|
|
|
(defvar gudap-server-programs
|
|
'(((elixir-mode elixir-ts-mode) . ("elixir-ls-debug"))
|
|
(c++-mode . "lldb-vscode")))
|
|
|
|
(defun gudap (server-command)
|
|
(gudap--connect server-command))
|
|
|
|
(defun gudap--connect (server-command)
|
|
(let* ((nickname server-command)
|
|
(readable-name (format "GUDAP (%s)" nickname))
|
|
(gud-buffer (gud-common-init "cat"
|
|
(lambda (_file args) args)
|
|
#'identity
|
|
(lambda (m) (gudap--message "%s" m))))
|
|
(dap-proc (make-process :name readable-name
|
|
:buffer (generate-new-buffer readable-name)
|
|
:command (list server-command)
|
|
:filter 'gudap--process-filter
|
|
:noquery t
|
|
:connection-type 'pipe
|
|
:coding 'utf-8-emacs-unix))
|
|
(conn (make-instance 'gudap-connection
|
|
:name readable-name
|
|
:process dap-proc
|
|
:gud-buffer gud-buffer)))
|
|
(process-put dap-proc 'gudap-connection conn)))
|
|
|
|
(cl-defgeneric gudap-send-request (server command arguments))
|
|
|
|
(cl-defmethod gudap-send-request (server (command (eql initialize)) arguments)
|
|
(puthash (gudap--next-seq server) 'initialize (gudap--sent-requests server))
|
|
(gudap--connection-send
|
|
server
|
|
(list :type "request"
|
|
:command "initialize"
|
|
:arguments (gudap--initialize-arguments))))
|
|
|
|
(cl-defgeneric gudap-handle-response (server type body))
|
|
|
|
(cl-defmethod gudap-handle-response (server type body)
|
|
(gudap--message "%s" body))
|
|
|
|
(cl-defmethod gudap-handle-response (server (type (eql initialize)) body)
|
|
(gudap--message "initialized"))
|
|
|
|
(cl-defgeneric gudap-handle-event (server event body))
|
|
|
|
(cl-defmethod gudap-handle-event (server event body)
|
|
(gudap--message "%s" message))
|
|
|
|
(cl-defmethod gudap-handle-event (server (event (eql output)) body)
|
|
(let ((gud-process (get-buffer-process (gudap-gud-buffer server))))
|
|
(cl-destructuring-bind
|
|
(&key category output group variablesReference source line column data)
|
|
body
|
|
(pcase category
|
|
("console" (gud-filter gud-process output))))))
|
|
|
|
(cl-defgeneric gudap-handle-request (server command arguments))
|
|
|
|
(defun gudap--initialize-arguments ()
|
|
(list :clientId "gudap"
|
|
:clientName "gudap"
|
|
:adapterId "gudap"
|
|
:locale "en-US"
|
|
:linesStartAt1 t
|
|
:columnsStartAt1 t
|
|
:pathFormat "path"
|
|
:supportsVariableType nil
|
|
:supportsVariablePaging nil
|
|
:supportsRunInTerminalRequest nil
|
|
:supportsMemoryReferences nil
|
|
:supportsProgressReporting nil
|
|
:supportsInvalidatedEvent nil
|
|
:supportsMemoryEvent nil
|
|
:supportsArgsCanBeInterpretedByShell nil
|
|
:supportsStartDebuggingRequest nil))
|
|
|
|
;; Utils
|
|
|
|
(defun gudap--message (format &rest args)
|
|
"Message out with FORMAT with ARGS."
|
|
(message "[gudap] %s" (apply #'format format args)))
|
|
|
|
;; JSONRPC-ish handling
|
|
|
|
(defvar gudap--in-process-filter nil
|
|
"Non-nil if inside `dap--process-filter'.")
|
|
|
|
(cl-defun gudap--process-filter (proc string)
|
|
"Called when new data STRING has arrived for PROC."
|
|
(when gudap--in-process-filter
|
|
;; Problematic recursive process filters may happen if
|
|
;; `dap--connection-receive', called by us, eventually calls
|
|
;; client code which calls `process-send-string' (which see) to,
|
|
;; say send a follow-up message. If that happens to writes enough
|
|
;; bytes for pending output to be received, we will lose JSONRPC
|
|
;; messages. In that case, remove recursiveness by re-scheduling
|
|
;; ourselves to run from within a timer as soon as possible
|
|
;; (bug#60088)
|
|
(run-at-time 0 nil #'gudap--process-filter proc string)
|
|
(cl-return-from gudap--process-filter))
|
|
(when (buffer-live-p (process-buffer proc))
|
|
(with-current-buffer (process-buffer proc)
|
|
(let* ((gudap--in-process-filter t)
|
|
(connection (process-get proc 'gudap-connection))
|
|
(expected-bytes (gudap--expected-bytes connection)))
|
|
;; Insert the text, advancing the process marker.
|
|
;;
|
|
(save-excursion
|
|
(goto-char (process-mark proc))
|
|
(let ((inhibit-read-only t)) (insert string))
|
|
(set-marker (process-mark proc) (point)))
|
|
;; Loop (more than one message might have arrived)
|
|
;;
|
|
(unwind-protect
|
|
(let (done)
|
|
(while (not done)
|
|
(cond
|
|
((not expected-bytes)
|
|
;; Starting a new message
|
|
;;
|
|
(setq expected-bytes
|
|
(and (search-forward-regexp
|
|
"\\(?:.*: .*\r\n\\)*Content-Length: \
|
|
*\\([[:digit:]]+\\)\r\n\\(?:.*: .*\r\n\\)*\r\n"
|
|
(+ (point) 200)
|
|
t)
|
|
(string-to-number (match-string 1))))
|
|
(unless expected-bytes
|
|
(setq done :waiting-for-new-message)))
|
|
(t
|
|
;; Attempt to complete a message body
|
|
;;
|
|
(let ((available-bytes (- (position-bytes (process-mark proc))
|
|
(position-bytes (point)))))
|
|
(cond
|
|
((>= available-bytes
|
|
expected-bytes)
|
|
(let* ((message-end (byte-to-position
|
|
(+ (position-bytes (point))
|
|
expected-bytes))))
|
|
(unwind-protect
|
|
(save-restriction
|
|
(narrow-to-region (point) message-end)
|
|
(let* ((json-message
|
|
(condition-case-unless-debug oops
|
|
(jsonrpc--json-read)
|
|
(error
|
|
(jsonrpc--warn "Invalid JSON: %s %s"
|
|
(cdr oops) (buffer-string))
|
|
nil))))
|
|
(when json-message
|
|
;; Process content in another
|
|
;; buffer, shielding proc buffer from
|
|
;; tamper
|
|
(with-temp-buffer
|
|
(gudap--connection-receive connection
|
|
json-message)))))
|
|
(goto-char message-end)
|
|
(let ((inhibit-read-only t))
|
|
(delete-region (point-min) (point)))
|
|
(setq expected-bytes nil))))
|
|
(t
|
|
;; Message is still incomplete
|
|
;;
|
|
(setq done :waiting-for-more-bytes-in-this-message))))))))
|
|
;; Saved parsing state for next visit to this filter
|
|
;;
|
|
(setf (gudap--expected-bytes connection) expected-bytes))))))
|
|
|
|
(defun gudap--connection-receive (conn message)
|
|
(cl-destructuring-bind (&key seq type event body arguments &allow-other-keys) message
|
|
(cond
|
|
(;; event
|
|
(string-equal type "event")
|
|
(gudap-handle-event conn (intern event) body))
|
|
(;; response
|
|
(string-equal type "response")
|
|
(let ((request-type (gethash seq (gudap--sent-requests conn))))
|
|
(if request-type
|
|
(gudap-handle-response conn request-type body)
|
|
(gudap--message "received response to a nonexistent request. ignoring")))
|
|
(remhash seq (gudap--sent-requests conn)))
|
|
(;; reverse request
|
|
(string-equal type "request")
|
|
(gudap-handle-request conn (intern command) arguments)))))
|
|
|
|
(defun gudap--connection-send (conn message)
|
|
(setq message (plist-put message :seq (gudap--next-seq conn)))
|
|
(let* ((json-object-type 'plist)
|
|
(json (jsonrpc--json-encode message))
|
|
(headers `(("Content-Length" . ,(format "%d" (string-bytes json)))))
|
|
(content (cl-loop for (header . value) in headers
|
|
concat (concat header ": " value "\r\n") into header-section
|
|
finally return (format "%s\r\n%s" header-section json))))
|
|
(process-send-string (gudap--process conn) content))
|
|
(setf (gudap--next-seq conn) (1+ (gudap--next-seq conn))))
|
|
|
|
;;;###autoload
|
|
(provide 'gudap)
|
|
|
|
;;; gudap.el ends here
|