Alias ack if ack-grep exists

.bash_aliases

@@ -1,3 +1,4 @@
+#!/bin/bash
 # ~/.bash_aliases
 
 alias grep='grep --color=auto'
@@ -7,6 +8,9 @@ alias ls='ls -AlF --color=auto'
 alias l='ls'
 alias v='vim'
 alias tf='tail -f'
+if command -v ack-grep >/dev/null; then
+  alias ack='ack-grep'
+fi
 # Enables alias expansion while using sudo
 alias sudo='sudo '