use exa as ls replacement

dot_bashrc

@@ -33,27 +33,25 @@ shopt -s checkwinsize
 #  EDITOR
 # ---------------------------------------------------------------------------
 
-if [ -f "$HOME/.local/bin/nvim" ]; then
-  export EDITOR=$HOME/.local/bin/nvim
-  export SVN_EDITOR=$HOME/.local/bin/nvim
-  export GIT_EDITOR=$HOME/.local/bin/nvim
-  export VISUAL=$HOME/.local/bin/nvim
-  alias vi='$HOME/.local/bin/nvim'
-elif [ -f "/usr/bin/vim" ]; then
-  export EDITOR=/usr/bin/vim
-  export SVN_EDITOR=/usr/bin/vim
-  export GIT_EDITOR=/usr/bin/vim
-  export VISUAL=/usr/bin/vim
-  alias vi='/usr/bin/vim'
+if hash nvim 2>/dev/null; then
+  export EDITOR=nvim
+elif hash vim 2>/dev/null; then
+  export EDITOR=vim
+elif hash vi 2>/dev/null; then 
+  export EDITOR=vi
+else
+  export EDITOR=nano
 fi
 
+export SVN_EDITOR=$EDITOR
+export GIT_EDITOR=$EDITOR
+export VISUAL=$EDITOR
+alias vi=$EDITOR
+
 # ---------------------------------------------------------------------------
 #  PROMPT
 # ---------------------------------------------------------------------------
 
-if [ -f "/usr/bin/starship" ]; then
-  eval "$(starship init bash)"
-else
 # set a minimalist prompt
 red='\[\e[0;31m\]'      # Red
 green='\[\e[0;32m\]'    # Green
@@ -85,15 +83,18 @@ else
     GIT_PROMPT_THEME=Solarized_Yax
     source $HOME/.bash-git-prompt/gitprompt.sh
 fi
-fi
 
 # ---------------------------------------------------------------------------
 #  ALIASES
 # ---------------------------------------------------------------------------
 
-# The ubiquitous 'll': directories first, with alphanumeric sorting
+if hash exa 2>/dev/null; then
+  alias ll="exa --long --group-directories-first --classify --git"
+  alias la="ll --all"
+else
   alias ll="ls -lv --group-directories-first --ignore=.." # show long listing but no hidden dotfiles except "."
   alias la='ls -lav' 
+fi
 
 alias rm='rm --interactive --verbose'
 alias mv='mv --interactive --verbose'