Improve ranger

hosts/home.nix

@@ -90,9 +90,28 @@ in
       goops = "g reset --soft HEAD^";
 
       v = "vim";
+      r = "ranger";
       rm = "trash-put";
     };
+    # Change to directory when exiting ranger with Q
+    # https://github.com/ranger/ranger/issues/1554#issuecomment-491650123
     bashrcExtra = ''
+      function ranger {
+        local IFS=$'\t\n'
+        local tempfile="$(mktemp -t tmp.XXXXXX)"
+        local ranger_cmd=(
+          command
+          ranger
+          --cmd="map Q chain shell echo %d > "$tempfile"; quitall"
+        )
+        
+        ''${ranger_cmd[@]} "$@"
+        if [[ -f "$tempfile" ]] && [[ "$(cat -- "$tempfile")" != "$(echo -n `pwd`)" ]]; then
+          cd -- "$(cat "$tempfile")" || return
+        fi
+        command rm -f -- "$tempfile" 2>/dev/null
+      }
+
       pfetch
       while true; do
         f=`fortune`