Fix #4784: browse-at-remote-prefer-symbolic = nil

+ Default browse-at-remote-prefer-symbolic to nil because a permanent
  URL is generally more desirable for developers sharing links.
+ 'SPC g y' and 'SPC o o' now support the prefix arg, which will negate
  the default value of browse-at-remote-prefer-symbolic for that call.

modules/config/default/+emacs-bindings.el

@@ -299,7 +299,7 @@
       ;;; <leader> v --- versioning
       (:prefix-map ("v" . "versioning")
        :desc "Git revert file"             "R"   #'vc-revert
-       :desc "Kill link to remote"         "y"   #'browse-at-remote-kill
+       :desc "Kill link to remote"         "y"   #'+vc/browse-at-remote-kill
        :desc "Kill link to homepage"       "Y"   #'+vc/browse-at-remote-kill-homepage
        (:when (featurep! :ui vc-gutter)
         :desc "Git revert hunk"            "r"   #'git-gutter:revert-hunk
@@ -327,7 +327,7 @@
          :desc "Find issue"                "i"   #'forge-visit-issue
          :desc "Find pull request"         "p"   #'forge-visit-pullreq)
         (:prefix ("o" . "open in browser")
-         :desc "Browse file or region"     "."   #'browse-at-remote
+         :desc "Browse file or region"     "."   #'+vc/browse-at-remote
          :desc "Browse homepage"           "h"   #'+vc/browse-at-remote-homepage
          :desc "Browse remote"             "r"   #'forge-browse-remote
          :desc "Browse commit"             "c"   #'forge-browse-commit

modules/config/default/+evil-bindings.el

@@ -411,7 +411,7 @@
       ;;; <leader> g --- git/version control
       (:prefix-map ("g" . "git")
        :desc "Revert file"                 "R"   #'vc-revert
-       :desc "Copy link to remote"         "y"   #'browse-at-remote-kill
+       :desc "Copy link to remote"         "y"   #'+vc/browse-at-remote-kill
        :desc "Copy link to homepage"       "Y"   #'+vc/browse-at-remote-kill-homepage
        (:when (featurep! :ui hydra)
         :desc "SMerge"                    "m"   #'+vc/smerge-hydra/body)
@@ -444,7 +444,7 @@
          :desc "Find issue"                "i"   #'forge-visit-issue
          :desc "Find pull request"         "p"   #'forge-visit-pullreq)
         (:prefix ("o" . "open in browser")
-         :desc "Browse file or region"     "o"   #'browse-at-remote
+         :desc "Browse file or region"     "o"   #'+vc/browse-at-remote
          :desc "Browse homepage"           "h"   #'+vc/browse-at-remote-homepage
          :desc "Browse remote"             "r"   #'forge-browse-remote
          :desc "Browse commit"             "c"   #'forge-browse-commit

modules/emacs/vc/autoload/vc.el

@@ -5,6 +5,29 @@
         (cdr (browse-at-remote--get-url-from-remote (car url))))
       (user-error "Can't find homepage for current project")))
 
+(defvar browse-at-remote-prefer-symbolic)
+;;;###autoload
+(defun +vc/browse-at-remote (&optional arg)
+  "Open URL to current file (and line if selection is active) in browser.
+If prefix ARG, negate the default value of `browse-at-remote-prefer-symbolic'."
+  (interactive "P")
+  (let ((browse-at-remote-prefer-symbolic
+         (if arg
+             (not browse-at-remote-prefer-symbolic)
+           browse-at-remote-prefer-symbolic)))
+    (browse-at-remote)))
+
+;;;###autoload
+(defun +vc/browse-at-remote-kill (&optional arg)
+  "Copy URL to current file (and line if selection is active) to clipboard.
+If prefix ARG, negate the default value of `browse-at-remote-prefer-symbolic'."
+  (interactive "P")
+  (let ((browse-at-remote-prefer-symbolic
+         (if arg
+             (not browse-at-remote-prefer-symbolic)
+           browse-at-remote-prefer-symbolic)))
+    (browse-at-remote-kill)))
+
 ;;;###autoload
 (defun +vc/browse-at-remote-homepage ()
   "Open homepage for current project in browser."

modules/emacs/vc/config.el

@@ -100,7 +100,13 @@ otherwise in default state."
 
 
 (after! browse-at-remote
+  ;; It's more sensible that the user have more options. If they want line
+  ;; numbers, users can request them by making a selection first. Otherwise
+  ;; omitting them.
   (setq browse-at-remote-add-line-number-if-no-region-selected nil)
+  ;; Opt to produce permanent links with `browse-at-remote' by default,
+  ;; using commit hashes rather than branch names.
+  (setq browse-at-remote-prefer-symbolic nil)
 
   ;; HACK `browse-at-remote' produces urls with `nil' in them, when the repo is
   ;;      detached. This creates broken links. I think it is more sensible to