;;; jao-shell.el --- shell utils                     -*- lexical-binding: t; -*-

;; Copyright (C) 2022  jao

;; Author: jao <mail@jao.io>
;; Keywords: shell

;; 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:

;; shell helpers

;;; Code:

(defun jao-shell-cmd-lines (cmd &rest args)
  (let ((cmd (concat cmd " " (combine-and-quote-strings args))))
    (split-string (shell-command-to-string cmd) "\n" t)))

(defun jao-shell-string (cmd &rest args)
  (string-trim (or (car (apply #'jao-shell-cmd-lines cmd args)) "")))

(defun jao-shell-exec (command &optional wait)
  (interactive
   (list (read-shell-command "$ "
                             (if current-prefix-arg
                                 (cons (concat " " (buffer-file-name)) 0)
                               ""))))
  (if wait
      (call-process-shell-command command)
    (start-process-shell-command command nil command)))

(defun jao-shell-exec* (command-or-wait &rest args)
  (let ((wait (and (not (stringp command-or-wait)) command-or-wait))
        (args (if (stringp command-or-wait) (cons command-or-wait args) args)))
    (jao-shell-exec (combine-and-quote-strings args) wait)))

(defun jao-shell-exec-p (command) (eq 0 (jao-shell-exec command t)))

(defmacro jao-shell-def-exec (name &rest args)
  `(defun ,name (&rest other-args)
     (interactive)
     (start-process-shell-command
      ,(car args)
      "*jao-exec - console*"
      (string-join (append (list ,@args) other-args) " "))))

(defun jao-shell-output (cmd handler)
  (with-temp-buffer
    (call-process-shell-command cmd nil (current-buffer))
    (beginning-of-buffer)
    (funcall handler)))

(defun jao-shell-running-p (pr) (eq 0 (jao-shell-exec* t "pidof" pr)))
(defun jao-shell-kill-p (pr) (eq 0 (jao-shell-exec* t "killall" pr)))

(provide 'jao-shell)
;;; jao-shell.el ends here