I have a bunch of *.erb files which I would like to expand using the
'erb' command-line tool from within a shell script.

However, I can't see how to set local variables so that <%= foo %>
works, other than piping the input onto stdin whilst prepending a
section like this:

<%
foo=123
bar="baz"
%>

Am I being dense here, or is this the only way to do it?

Thanks,

Brian.

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