zsh/git: add alias to go back to root dir

.gitconfig

@@ -70,6 +70,7 @@
     up = pull --rebase --autostash
     rebaseour = "rebase -Xours"
     rank = "shortlog -s -n --no-merges"
+	root = rev-parse --show-toplevel
 [rebase]
     # when rebasing, update the other common branch too.
     # See https://andrewlock.net/working-with-stacked-branches-in-git-is-easier-with-update-refs/

.zsh/30_alias.zsh

@@ -65,3 +65,9 @@ alias -g S='&> /dev/null &'
 alias alert='notify-send --urgency=low -i "$([ $? = 0 ] && echo terminal || echo error)" "$(history|tail -n1|sed -e '\''s/^\s*[0-9]\+\s*//;s/[;&|]\s*alert$//'\'')"'
 
 alias senv='source ~/venv/bin/activate'
+alias r='if [[ $(git rev-parse --is-inside-work-tree 2> /dev/null) != 'true' ]]; then
+    >&2 echo "Not a git repository"
+    return 1
+else
+    cd $(git root)
+fi'