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+++ README.md
+# vmd.el
+
+vmd is an Emacs package to interact with [OpenBSD' vmd][vmd].
+
+
+[vmd]: http://man.openbsd.org/vmd
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--- /dev/null
+++ vmd.el
+;;; vmd.el --- vmd interaction mode -*- lexical-binding: t; -*-
+
+;; Copyright (C) 2021 Omar Polo
+
+;; Author: Omar Polo <op@omarpolo.com>
+;; Keywords: tools
+;; Version: 0.1.0
+;; Package-Requires: ((transient "0.3.4"))
+
+;; 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:
+
+;; TODO
+
+;;; Code:
+
+(require 'term)
+(require 'transient)
+
+(defgroup vmd nil
+ "Vmd."
+ :prefix "vmd-"
+ :group 'vmd)
+
+(defcustom vmd-vmctl-cmd "vmctl"
+ "Path to the vmctl command to use."
+ :type 'string)
+
+(defcustom vmd-console-function #'vmd-run-in-term
+ "Function to use for the `vmd-console' command.
+It takes two arguments, the string name and the cmd arguments
+list, and should pop a buffer with a terminal running the
+commands in cmd."
+ :type 'function)
+
+(defun vmd-run-in-term (name cmd)
+ "Run CMD inside a term buffer called NAME."
+ (pop-to-buffer (apply #'term-ansi-make-term
+ (concat "*" name "*")
+ (car cmd) nil (cdr cmd))))
+
+(defun vmd--update-table ()
+ "Update the `tabulated-list-mode' with the list of virtual machines."
+ (let ((columns [("ID" 3 t)
+ ("PID" 5 nil)
+ ("VCPUS" 5 nil)
+ ("MAXMEM" 6 nil)
+ ("CURMEM" 6 nil)
+ ("TTY" 10 t)
+ ("OWNER" 8 t)
+ ("STATE" 8 t)
+ ("NAME" 30 t)])
+ (rows (mapcar (lambda (x) `(,(car x) ,(apply #'vector x)))
+ (mapcar (lambda (x)
+ (split-string x nil t))
+ (cdr
+ (split-string (shell-command-to-string "vmctl status")
+ "\n" t))))))
+ (setq tabulated-list-format columns
+ tabulated-list-entries rows)
+ (tabulated-list-init-header)
+ (tabulated-list-print)))
+
+(defun vmd--vm-at-point ()
+ "Return the vm name at point."
+ (unless (derived-mode-p 'vmd-mode)
+ (error "Not in vmd-mode"))
+ (let* ((row (tabulated-list-get-entry))
+ (len (length row)))
+ (when (or (null row)
+ (= len 0))
+ (error "No vm at point"))
+ (aref row (1- len))))
+
+(defun vmd--vmctl (&rest args)
+ "Run a vmctl command with ARGS."
+ (shell-command (mapconcat #'shell-quote-argument (cons "vmctl" args) " ")))
+
+(defun vmd-console (vm)
+ "Open a console for the virtual machine VM at point."
+ (interactive (list (vmd--vm-at-point)) vmd-mode)
+ (funcall vmd-console-function
+ (concat "vmd console " vm)
+ (mapcar #'shell-quote-argument
+ (list vmd-vmctl-cmd "console" vm))))
+
+(defun vmd-pause (vm)
+ "Pause the virtual machine VM at point."
+ (interactive (list (vmd--vm-at-point)) vmd-mode)
+ (vmd--vmctl "pause" vm)
+ (vmd--update-table))
+
+(defun vmd-start (vm)
+ "Start the virtual machine VM at point."
+ (interactive (list (vmd--vm-at-point)) vmd-mode)
+ (vmd--vmctl "start" vm)
+ (vmd--update-table))
+
+(defun vmd-stop (vm)
+ "Stop the virtual machine VM at point."
+ (interactive (list (vmd--vm-at-point)) vmd-mode)
+ (vmd--vmctl "stop" vm)
+ (vmd--update-table))
+
+(defun vmd-unpause (vm)
+ "Unpause the virtual machine VM at point."
+ (interactive (list (vmd--vm-at-point)) vmd-mode)
+ (vmd--vmctl "unpause" vm)
+ (vmd--update-table))
+
+(transient-define-prefix vmd--transient ()
+ "Vmd."
+ ["Action"
+ [("c" "console" vmd-console)
+ ("P" "pause" vmd-pause)
+ ("s" "start" vmd-start)
+ ("S" "stop" vmd-stop)
+ ("u" "unpause" vmd-unpause)]])
+
+(defvar vmd-mode-map
+ (let ((m (make-sparse-keymap)))
+ (define-key m (kbd "c") #'vmd-console)
+ (define-key m (kbd "P") #'vmd-pause) ; don't conflict with previous-line
+ (define-key m (kbd "s") #'vmd-start)
+ (define-key m (kbd "S") #'vmd-stop)
+ (define-key m (kbd "u") #'vmd-unpause)
+
+ ;; one transient to rule them all
+ (define-key m (kbd "x") #'vmd--transient)
+ m))
+
+(define-derived-mode vmd-mode tabulated-list-mode "vmd"
+ "Vmd mode."
+ (vmd--update-table)
+ (add-hook 'tabulated-list-revert-hook #'vmd--update-table nil t))
+
+(defun vmd ()
+ "Start vmd."
+ (interactive)
+ (switch-to-buffer "*vmd*")
+ (vmd-mode))
+
+(provide 'vmd)
+;;; vmd.el ends here