;;; oni-compilation.el --- Compilation configuration  -*- lexical-binding: t; -*-

;; Copyright (C) 2019  Tom Willemse

;; Author: Tom Willemse <tom@ryuslash.org>
;; Keywords: local
;; Version: 20190226011246
;; Package-Requires: (oni-shackle)

;; 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:

;; Configuration for the compilation mode.

;;; Code:

(require 'compile)
(require 'shackle)
(require 'subr-x)

(setq compilation-scroll-output t)

(defun oni-compilation--maybe-dont-show-window (buffer-or-name alist plist)
  "Don't show BUFFER-OR-NAME unless it absolutely must.

ALIST and PLIST contain extra information about the buffer."
  (if (alist-get 'allow-no-window alist)
      buffer-or-name
    (funcall (plist-get plist :fallback) buffer-or-name alist
             (plist-put (copy-sequence plist) :custom nil))))

(defun oni-compilation--maybe-display-compilation-window (buffer status)
  "Display BUFFER if STATUS is not finished."
  (unless (string= (string-trim status) "finished")
    (display-buffer buffer)))

(defun oni-compilation--ansi-color-for-compilation-filter ()
  "Apply ANSI terminal escape codes to compilation output."
  (ansi-color-apply-on-region compilation-filter-start (point)))

(defun oni-compilation--compilation-finish-notify-function (buffer status)
  "Show an alert of the status of the compliation.

BUFFER is the `compilation-mode' buffer and STATUS is the exit
status of the process."
  (when (string= (buffer-name buffer) "*compilation*")
    (if (string= (string-trim status) "finished")
        (alert "Compilation finished succesfully")
      (alert "Compilation finished with an error"))))

(add-to-list 'shackle-rules
             '(compilation-mode :custom oni-compilation--maybe-dont-show-window
                                :fallback shackle-display-buffer
                                :other t :select t))

(add-hook 'compilation-filter-hook
          #'oni-compilation--ansi-color-for-compilation-filter)

(add-hook 'compilation-finish-functions
          #'oni-compilation--maybe-display-compilation-window)

(add-hook 'compilation-finish-functions
          #'oni-compilation--compilation-finish-notify-function)

;;;###autoload(with-eval-after-load 'compile (require 'oni-compilation))

(provide 'oni-compilation)
;;; oni-compilation.el ends here