Get a file content in Bash after expanding its variables

cat file

$VAR

cat script开发者_如何学Go

#!/bin/bash
CONTENT=$(<file)
echo $CONTENT

./script

$VAR

I'd like to get the variable's actual value, not "$VAR". How to get a weaker quoting? Many thanks!

This should do it:

CONTENT=$(eval echo -e `<file`)