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Date: Mon, 3 Feb 2003 18:15:18 -0500
From: William Park <opengeometry@yahoo.ca>
To: zsh-users@sunsite.dk
Subject: Re: (feature request) Shell script within shell script
Message-ID: <20030203231518.GA8900@node1.opengeometry.net>
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References: <20030128042243.GA3888@node1.opengeometry.net> <20030128104034.GA6470@node1.opengeometry.net> <20030131204945.GA1189@node1.opengeometry.net> <20030201073655.GA3893@node1.opengeometry.net>
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On Sat, Feb 01, 2003 at 02:36:55AM -0500, William Park wrote:
> Dear Zsh expert,
> 
> When writing a shell script, quite often, I have to write bunch of
> separate Awk/Python/Perl/etc scripts that are more than few lines.  I
> tend to lose track of which script does what, and get bitten over two
> levels of quotes.
> 
> Essentially, I wish I could do something like
>     
>     herefile test1 << "EOF"
>     #! /usr/bin/gawk -f
>     ...
>     ...
>     EOF
> 
> and
> 
>     herefile test2 << "EOF"
>     #! /usr/bin/python
>     ...
>     ...
>     EOF
> 
> so that invocation and usage of 'test1' and 'test2' will be the same as
> if they were separate real files.
> 
> Can Zsh do this now?  If not, does Zsh have standard mechanism to
> provide this kind of extensions?


I've finally managed to find a solution.  It's called "process
substitution":
    function test1 () {
	awk -f <( cat <<"EOF"
	    ...
	    ...
	EOF
	)
    }
and
    function test2 () {
	python <( cat <<"EOF"
	    ...
	    ...
	EOF
	)
    }

-- 
William Park, Open Geometry Consulting, <opengeometry@yahoo.ca>
Linux solution for data management and processing.