fish: functions: Add alias to switch git repo between HTTPS and SSH

Taken from
https://github.com/whonore/dotfiles/blob/main/fish/functions/git_remote_toggle.fish

fish/.config/fish/functions/git_remote_toggle.fish

@@ -0,0 +1,76 @@
+function git_remote_toggle --description 'Switch git repository between HTTPS and SSH'
+  set -l options h/help q/quiet S/ssh H/https
+  argparse $options -- $argv; or return
+
+  if set -q _flag_help
+    echo 'Usage: git_remote_toggle [-h/--help] [-q/--quiet] [-S/--ssh] [-H/--https] [remotes ...]'
+    return 0
+  end
+
+  if set -q _flag_ssh; and set -q _flag_https
+    echo 'Must choose only one of --ssh and --https'
+    return 1
+  end
+
+  if ! __grt_in_git
+    echo 'Not in a git repository'
+    return 1
+  end
+
+  for remote in $argv
+    set -l url (git remote get-url $remote 2>/dev/null)
+    set -l newurl
+
+    if test -z "$url"
+      if ! set -q _flag_quiet
+        echo "Remote $remote does not exist"
+      end
+      continue
+    else if __grt_is_ssh $url; and ! set -q _flag_ssh
+      set newurl (__grt_to_https $url)
+    else if __grt_is_https $url; and ! set -q _flag_https
+      set newurl (__grt_to_ssh $url)
+    end
+
+    if test -n "$newurl"
+      # Sanity check
+      if __grt_is_ssh $url; and __grt_is_https $newurl
+      else if __grt_is_https $url; and __grt_is_ssh $newurl
+      else
+        echo "Something went wrong: $url -> $newurl"
+        continue
+      end
+
+      if ! set -q _flag_quiet
+        echo "$remote: $url -> $newurl"
+      end
+      git remote set-url $remote $newurl
+    end
+  end
+end
+
+# git@github.com:{repo} -> https://github.com/{repo}
+function __grt_to_https
+  set -l url (string replace ':' '/' $argv)
+  set -l url (string replace 'git@' 'https://' $url)
+  echo $url
+end
+
+# https://github.com/{repo} -> git@github.com:{repo}
+function __grt_to_ssh
+  set -l url (string replace 'https://' 'git@' $argv)
+  set -l url (string replace '/' ':' $url)
+  echo $url
+end
+
+function __grt_is_ssh
+  string match -qr '^git@' $argv
+end
+
+function __grt_is_https
+  string match -qr '^https://' $argv
+end
+
+function __grt_in_git
+  git status 2&>/dev/null
+end