improve interop between zsh and bash

home/bash-config/bashrc.local

@@ -3,7 +3,9 @@
 
 # check the window size after each command and, if necessary,
 # update the values of LINES and COLUMNS.
+if [[ -n "$BASH_VERSION" ]]; then
    shopt -s checkwinsize
+fi
 
 # If set, the pattern "**" used in a pathname expansion context will
 # match all files and zero or more directories and subdirectories.
@@ -21,7 +23,9 @@ esac
 HISTCONTROL=ignoreboth
 
 # append to the history file, don't overwrite it
+if [[ -n "$BASH_VERSION" ]]; then
  shopt -s histappend
+fi
 
 # for setting history length see HISTSIZE and HISTFILESIZE in bash(1)
 HISTSIZE=1000