Re: (feature request) here-document, but from a file

[Bob Proulx]

Chris F.A. Johnson wrote:
> William Park wrote:
> >It would be nice if I can read a file and process it as though it was
> >here-document text in the script.  Mainly, I want variable substitution,
> >without calling lots of 'sed'.
> >
> >In Python, you would do
> >   print "..." % ...
> >
> >So, perhaps, you can use syntax like
> >   cat <<+ file
> >   cat <<<< file
> 
>     Why can't you use:
> 
> cat < file

The original poster said that the behavior wanted was variable
substitution as in a here-document.  Using 'cat < file' would not
expand any variables.

However counter proposals are useful.  Will this work for you?

  eval echo $(<file)

That will expand variables from the file using existing standard syntax.

Bob