;;; GolangCubes --- The Golang cubes for FG42 -*- lexical-binding: t; -*-
;;
;; Copyright (c) 2010-2022 Sameer Rahmani & Contributors
;;
;; Author: Sameer Rahmani <lxsameer@gnu.org>
;; URL: https://gitlab.com/FG42/FG42
;; Version: 3.0.0
;;
;; 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 <http://www.gnu.org/licenses/>.
;;
;;; Commentary:
;;; Code:
(require 'fg42/flags)


(defun fg42/go-path-from-env ()
  "Gets gopath from OS env."
  (exec-path-from-shell-copy-env "GOPATH"))


(defun fg42/go-path-binary (gopath)
  "Gets Go binaries path with respect to the given GOPATH."
  ;; TODO: Use `expand-file-name' here
  (concat gopath "/bin"))

(defun fg42/initialize-golang ()
  "Setup Emacs hooks and turn necessary modes on."
  (when-flag lsp
    (lsp-register-custom-settings
     '(("gopls.completeUnimported" t t)
       ("gopls.staticcheck" t t)))
    (add-hook 'before-save-hook
              (lambda ()
                (when (eq major-mode 'go-mode)
                  (lsp-format-buffer t)
                  (lsp-organize-imports t)))))

  (when-flag company
    (setq-local company-backends
                '(company-capf
                  company-dabbrev
                  company-dabbrev-code)))

  (let ((go-path (or (plist-get fg42/golang-cube-params :go-path)
                     (fg42/go-path-from-env))))
    (add-to-list 'exec-path (fg42/go-path-binary go-path)))

  (local-set-key (kbd "M-.") #'godef-jump)
  (local-set-key (kbd "M-*") 'pop-tag-mark))


(provide 'cubes/golang/core)
;;; core.el ends here