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;;; jao-vterm-repl.el --- vterm-based repls -*- lexical-binding: t; -*-
;; Copyright (C) 2020, 2021 jao
;; Author: jao <mail@jao.io>
;; Keywords: terminals
;; 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:
;; Helpers to launch reply things such as erlang shells inside a vterm.
;; For instance, to declare an erl repl for rebar projects, one would call:
;;
;; (jao-vterm-repl-register "rebar.config" "rebar3 shell" "^[0-9]+> ")
;;; Code:
(require 'jao-compilation)
(declare-function 'vterm-copy-mode "vterm")
(declare-function 'vterm-send-string "vterm")
(declare-function 'vterm-send-return "vterm")
(defun jao-vterm-repl--buffer-name (&optional dir)
(format "*vterm -- repl - %s*" (or dir (jao-compilation-root))))
(defvar jao-vterm-repl-repls nil)
(defvar jao-vterm-repl-prompts nil)
(defvar-local jao-vterm-repl--name nil)
(defvar-local jao-vterm-repl--last-buffer nil)
(defvar-local jao-vterm-repl--prompt-rx "^[0-9]+> ")
(defun jao-vterm-repl--exec (cmd &optional name)
(vterm name)
(when name
(vterm-send-string "unset PROMPT_COMMAND\n\n"))
(vterm-send-string cmd)
(vterm-send-return)
(when name (rename-buffer name)))
;;;###autoload
(defun jao-vterm-repl-previous-prompt ()
(interactive)
(when (derived-mode-p 'vterm-mode)
(vterm-copy-mode 1)
(forward-line 0)
(when (re-search-backward jao-vterm-repl--prompt-rx nil t)
(goto-char (match-end 0)))))
;;;###autoload
(defun jao-vterm-repl-next-prompt ()
(interactive)
(when (derived-mode-p 'vterm-mode)
(vterm-copy-mode 1)
(or (re-search-forward jao-vterm-repl--prompt-rx nil t)
(vterm-copy-mode -1))
(unless (save-excursion
(re-search-forward jao-vterm-repl--prompt-rx nil t))
(vterm-copy-mode -1))))
;;;###autoload
(define-minor-mode jao-vterm-repl-mode "repl-aware vterm" nil nil
'(("\C-c\C-p" . jao-vterm-repl-previous-prompt)
("\C-c\C-n" . jao-vterm-repl-next-prompt)
("\C-c\C-z" . jao-vterm-repl-pop-to-src)))
;;;###autoload
(defun jao-vterm-repl ()
(let* ((dir (jao-compilation-root))
(vname (jao-vterm-repl--buffer-name dir))
(root-name (jao-compilation-root-file))
(buffer (seq-find `(lambda (b)
(string=
(buffer-local-value 'jao-vterm-repl--name
b)
,vname))
(buffer-list))))
(or buffer
(let ((default-directory dir)
(prompt (cdr (assoc root-name jao-vterm-repl-prompts)))
(cmd (or (cdr (assoc root-name jao-vterm-repl-repls))
(read-string "REPL command: "))))
(jao-vterm-repl--exec cmd (format "* vrepl - %s *" root-name))
(jao-vterm-repl-mode)
(setq-local jao-vterm-repl--name vname)
(when prompt (setq-local jao-vterm-repl--prompt-rx prompt))
(current-buffer)))))
;;;###autoload
(defun jao-vterm-repl-register (build-file repl-cmd prompt-rx)
(jao-compilation-add-dominating build-file)
(add-to-list 'jao-vterm-repl-repls (cons build-file repl-cmd))
(add-to-list 'jao-vterm-repl-prompts (cons build-file prompt-rx)))
;;;###autoload
(defun jao-vterm-repl-pop-to-repl ()
(interactive)
(let ((bn (current-buffer)))
(pop-to-buffer (jao-vterm-repl))
(setq-local jao-vterm-repl--last-buffer bn)))
;;;###autoload
(defun jao-vterm-repl-pop-to-src ()
(interactive)
(when (buffer-live-p jao-vterm-repl--last-buffer)
(pop-to-buffer jao-vterm-repl--last-buffer)))
;;;###autoload
(defun jao-vterm-repl-send (cmd)
(with-current-buffer (jao-vterm-repl) (vterm-send-string cmd)))
(provide 'jao-vterm-repl)
;;; jao-vterm-repl.el ends here
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