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(require 'fcuny-defuns)

(use-package gitconfig-mode
  :ensure t)

(use-package gitattributes-mode
  :ensure t)

(use-package gitignore-mode
  :ensure t)

(use-package magit
  :ensure t
  :after (flyspell)
  :bind (("C-x g" . magit-status))
  :custom
  (vc-follow-symlinks t)
  :config
  ;; if we're on darwin, we're on a work laptop, so let's make sure we
  ;; use the proper `git' binary.
  (when (string= system-type "darwin")
    (setq magit-git-executable "/opt/twitter_mde/bin/git"))
  ;; I want to see these things by default
  (add-to-list 'magit-section-initial-visibility-alist '(untracked . show))
  (add-to-list 'magit-section-initial-visibility-alist '(unstaged . show))
  (add-to-list 'magit-section-initial-visibility-alist '(unpulled . show))
  (add-to-list 'magit-section-initial-visibility-alist '(unpushed . show))
  (add-to-list 'magit-section-initial-visibility-alist '(stashes . show))
  ;; no need to show the last 10 commits, 5 is enough.
  (setq magit-log-section-commit-count 5)
  ;; when working with source, some of the hooks are extremely
  ;; expensive and don't add much values (i.e tags). Let's reduce the
  ;; list to things that are actually useful. This still takes ~10
  ;; seconds when running `magit-status'.
  (setq git-commit-setup-hook
        '(git-commit-save-message
          git-commit-turn-on-auto-fill
          git-commit-turn-on-flyspell
          git-commit-propertize-diff
          with-editor-usage-message))
  (setq magit-refs-sections-hook
      '(magit-insert-error-header
        magit-insert-branch-description
        magit-insert-local-branches))
  (setq magit-status-sections-hook
        '(magit-insert-status-headers
          magit-insert-merge-log
          magit-insert-rebase-sequence
          magit-insert-am-sequence
          magit-insert-sequencer-sequence
          magit-insert-untracked-files
          magit-insert-unstaged-changes
          magit-insert-staged-changes
          magit-insert-stashes))
  (setq magit-status-headers-hook
      '(magit-insert-error-header
        magit-insert-diff-filter-header
        magit-insert-head-branch-header)))

(use-package magit-repos
  :ensure nil
  :after (magit)
  :custom
  (magit-repository-directories '(("~/workspace" . 1))))

(use-package git-commit
  :ensure t
  :after magit
  :hook (git-commit-mode . fcuny/git-commit-auto-fill)
  :custom
  (git-commit-summary-max-length 50)
  :preface
  (defun fcuny/git-commit-auto-fill ()
    "Ensures that the commit body does not exceed 72 characters."
    (setq-local fill-column 72)
    (setq-local comment-auto-fill-only-comments nil)))

;; from https://sideshowcoder.com/2020/07/02/opening-sourcegraph-from-emacs/
;; in a repo, add the following in .git/config:
;;
;; [git-link]
;;        remote = mysourcegraph.sourcegraph
;; [remote "mysourcegraph.sourcegraph"]
;;        url = https://sourcegraph.twitter.biz/gitpuppet.twitter.biz/puppet-twitter
;;
(use-package git-link
  :ensure t
  :config
  (defun git-link-sourcegraph (hostname dirname filename _branch commit start end)
    (let ((line-or-range (if end (format "%s-%s" start end) start)))
      (format "https://%s/%s@%s/-/blob/%s#L%s"
              hostname
              dirname
              commit
              filename
              line-or-range)))

  (defun git-link-commit-sourcegraph (hostname dirname commit)
    (format "https://%s/%s/-/commit/%s"
            hostname
            dirname
            commit))

  (add-to-list 'git-link-remote-alist '("sourcegraph" git-link-sourcegraph))
  (add-to-list 'git-link-commit-remote-alist '("sourcegraph" git-link-commit-sourcegraph))

  (setq git-link-open-in-browser 't))

;; https://magit.vc/manual/magit/Per_002dRepository-Configuration.html
;; we don't want to refresh buffers in source. This should help with
;; performances.
(dir-locals-set-class-variables 'huge-git-repository
                                '((nil . ((magit-refresh-buffers . nil)))))

(dir-locals-set-directory-class
 "/Users/fcuny/workspace/source" 'huge-git-repository)

;; https://magit.vc/manual/magit/Performance.html
;; disable Git from the VC mode, since we use magit. This should help
;; with performances.
(setq vc-handled-backends (delq 'Git vc-handled-backends))

(provide 'fcuny-git)