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;;; ravi-init-vc.el --- vc control

;; Copyright (C) 2013

;; Author:  <ravi@nero.lan>
;; Keywords: vc

;; 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:

;; Version control initialization

;;; Code:

(use-package vdiff
  :commands (vdiff-files
             vdiff-files3
             vdiff-buffers
             vdiff-buffers3
             vdiff-current-file
             vdiff-merge-conflict)
  :bind (:map vdiff-3way-mode-map
         ("M-r" . vdiff-hydra/body)
         :map vdiff-mode-map
         ("M-r" . vdiff-hydra/body)))

;; Git
(use-package magit
  :bind (("<M-f3>" . magit-status)
         ("C-c g" . magit-dispatch)
         ("C-c M-g" . magit-file-dispatch))
  :init
  (setq magit-define-global-key-bindings nil)
  :config
  (progn
    (setq-default
     magit-process-popup-time 10
     magit-diff-refine-hunk t
     magit-completing-read-function (pcase ravi/use-selection-system
                                      ('helm #'helm--completing-read-default)
                                      ('ido #'magit-ido-completing-read)
                                      ('selectrum #'selectrum-completing-read)
                                      (_ #'magit-builtin-completing-read)))

    (setq magit-restore-window-configuration t)
    (add-hook 'magit-post-refresh-hook 'diff-hl-magit-post-refresh)

    (defvar ravi/sync-top-level-host-extra-args ""
      "Extra arguments to rsync for `ravi/sync-top-level'")

    (defun ravi/sync-top-level ()
      (when (and (boundp 'ravi/sync-top-level-host)
                 (not (s-equals? (car (s-split-up-to "\\." (system-name) 1))
                                 (car (s-split-up-to "\\." ravi/sync-top-level-host 1)))))
        (message "Synchronizing with %s" ravi/sync-top-level-host)
        (shell-command (concat "rsync -a " ravi/sync-top-level-host-extra-args
                               " " (magit-toplevel) " " ravi/sync-top-level-host ":" (magit-toplevel)))))
    (add-hook 'magit-post-refresh-hook 'ravi/sync-top-level)

    (use-package vdiff-magit
      :commands (vdiff-magit
                 vdiff-magit-dwim)
      :init
      (define-key magit-mode-map "e" 'vdiff-magit-dwim)
      (define-key magit-mode-map "E" 'vdiff-magit)
      (transient-suffix-put 'magit-dispatch "e" :description "vdiff (dwim)")
      (transient-suffix-put 'magit-dispatch "e" :command 'vdiff-magit-dwim)
      (transient-suffix-put 'magit-dispatch "E" :description "vdiff")
      (transient-suffix-put 'magit-dispatch "E" :command 'vdiff-magit))
    )
  :ensure t)
(use-package forge
  :after magit)

;; Use 'git config --add magit.extension svn' in repository to enable
;; magit-svn for that repository
(use-package magit-svn)
(use-package gitignore-mode)
(use-package gitconfig-mode)
(use-package git-messenger
  :if window-system
  :bind ("C-x v p" . git-messenger:popup-message))
(use-package git-timemachine
  :bind ("C-x v t" . git-timemachine))
(use-package vc-git
  :bind ("C-x v f" . vc-git-grep)
  :ensure nil)
(use-package git-link
  :bind ("C-x v N" . git-link)
  :init                                 ; init, not config, so that we have these in local.el
  (require 'subr-x)
  (require 's)
  (defun ravi/git-link-bitbucket-server-repo-name-format (hostname dirname)
    (when-let* ((reponame-parts (s-split "/" dirname))
                (proj-name (nth-value 0 reponame-parts))
                (repo-name (nth-value 1 reponame-parts)))
      (format "https://%s/projects/%s/repos/%s" hostname proj-name repo-name)))
  (defun ravi/git-link-bitbucket-server (hostname dirname filename branch commit start end)
    (let ((at-point (if (and git-link-use-commit commit)
                        commit
                      (or branch commit)))
          (repo-name (ravi/git-link-bitbucket-server-repo-name-format hostname dirname)))
      (format "%s/browse/%s"
              repo-name
              (concat filename
                      (if at-point (format "?at=%s" at-point) "")
                      (if start
                          (if end
                              (format "#%s-%s" start end)
                            (format "#%s" start))
                        "")))))

  (defun ravi/git-link-commit-bitbucket-server (hostname dirname commit)
    (format "%s/commits/%s"
            (ravi/git-link-bitbucket-server-repo-name-format hostname dirname)
            commit))

  (defun ravi/git-link-bitbucket-server-enable (server-regexp)
    (add-to-list 'git-link-remote-alist
                 (list server-regexp #'ravi/git-link-bitbucket-server))
    (add-to-list 'git-link-commit-remote-alist
                 (list server-regexp #'ravi/git-link-commit-bitbucket-server))))

(use-package diff-hl
  :config
  (global-diff-hl-mode)
  (unless window-system
    (diff-hl-margin-mode)))

;; Stolen almost entirely from Fuco (Matus Goljer)
(use-package ediff
  :hook (ediff-keymap-setup-hook . ravi/add-d-to-ediff-mode-map)
  :commands ravi/add-d-to-ediff-mode-map
  :config
  (defvar my-ediff-before-config nil "Window configuration before ediff.")
  (defvar my-ediff-after-config nil "Window configuration after ediff.")

  (unless window-system
    (setq ediff-split-window-function #'split-window-horizontally)
    (setq ediff-window-setup-function #'ediff-setup-windows-plain))

  (defun my-ediff-before-setup ()
    "Function to be called before any buffers or window setup for
    ediff."
    (setq my-ediff-before-config (current-window-configuration))
    (set-register ?b (list my-ediff-before-config (point-marker))))

  (defun my-ediff-after-setup ()
    "Function to be called after buffers and window setup for ediff."
    (setq my-ediff-after-config (current-window-configuration))
    (set-register ?e (list my-ediff-after-config (point-marker))))

  (defun my-ediff-quit ()
    "Function to be called when ediff quits."
    (when my-ediff-before-config
      (set-window-configuration my-ediff-before-config))
    ;; clean up ediff bullshit
    (->> (buffer-list)
      (-map 'buffer-name)
      (--select (string-match-p "\\*[Ee]diff" it))
      (-map 'kill-buffer)))

  ;; Copy both sides in a merge
  (defun ravi/ediff-copy-both-to-C ()
    (interactive)
    (ediff-copy-diff ediff-current-difference nil 'C nil
                     (concat
                      (ediff-get-region-contents ediff-current-difference 'A ediff-control-buffer)
                      (ediff-get-region-contents ediff-current-difference 'B ediff-control-buffer))))
  (defun ravi/add-d-to-ediff-mode-map () (define-key ediff-mode-map "d" #'ravi/ediff-copy-both-to-C))

  (add-hook 'ediff-before-setup-hook 'my-ediff-before-setup)
  (add-hook 'ediff-after-setup-windows-hook 'my-ediff-after-setup 'append)
  (add-hook 'ediff-quit-hook 'my-ediff-quit))

(use-package smerge-mode
  :config
  (defhydra unpackaged/smerge-hydra
    (:color pink :hint nil :post (smerge-auto-leave))
    "
^Move^       ^Keep^               ^Diff^                 ^Other^
^^-----------^^-------------------^^---------------------^^-------
_n_ext       _b_ase               _<_: upper/base        _C_ombine
_p_rev       _u_pper              _=_: upper/lower       _r_esolve
^^           _l_ower              _>_: base/lower        _k_ill current
^^           _a_ll                _R_efine
^^           _RET_: current       _E_diff
"
    ("n" smerge-next)
    ("p" smerge-prev)
    ("b" smerge-keep-base)
    ("u" smerge-keep-upper)
    ("l" smerge-keep-lower)
    ("a" smerge-keep-all)
    ("RET" smerge-keep-current)
    ("\C-m" smerge-keep-current)
    ("<" smerge-diff-base-upper)
    ("=" smerge-diff-upper-lower)
    (">" smerge-diff-base-lower)
    ("R" smerge-refine)
    ("E" smerge-ediff)
    ("C" smerge-combine-with-next)
    ("r" smerge-resolve)
    ("k" smerge-kill-current)
    ("ZZ" (lambda ()
            (interactive)
            (save-buffer)
            (bury-buffer))
     "Save and bury buffer" :color blue)
    ("q" nil "cancel" :color blue))
  :hook (magit-diff-visit-file-hook . (lambda ()
                                        (when smerge-mode
                                          (unpackaged/smerge-hydra/body)))))

(provide 'ravi-init-vc)
;;; ravi-init-vc.el ends here