Disable ls alias only during chruby load time

Note that `chruby` calls `ls` only during load time, so this is a better
workaround than eb8e022.

posix-sh/config.sh

@@ -1,13 +1,12 @@
 alias g=git
 alias be='bundle exec'
-alias ls='ls --color=auto'
 alias docker-shell='docker run --rm --interactive --tty --volume "$PWD:/docker"'
 alias ping='ping -c 10'
 alias pu=pushd po=popd d='dirs -v'
 
 if command -v exa >/dev/null 2>&1
-then alias ll='exa --long' la='exa --all' tree='exa --tree'
-else alias ll='ls -l --human-readable' la='ls --almost-all'
+then alias ls=exa ll='exa --long' la='exa --all' tree='exa --tree'
+else alias ls='ls --color=auto' ll='ls -l --human-readable' la='ls --almost-all'
 fi
 
 if command -v bat >/dev/null

zsh/config.zsh

@@ -45,8 +45,14 @@ source_from_share nvm/nvm.sh
 
 source_maybe ~/.config/zsh/local-config.zsh
 
-source_from_share chruby/chruby.sh
-source_from_share chruby/auto.sh
+function () {
+	local ls_alias=$aliases[ls]
+	unalias ls
+	source_from_share chruby/chruby.sh
+	source_from_share chruby/auto.sh
+	alias ls="$ls_alias"
+}
+
 source_from_share zsh-syntax-highlighting/zsh-syntax-highlighting.zsh
 
 unfunction source_from_share source_maybe