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From: Kevin Rodgers <ihs_4664@yahoo.com>
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Subject: Re: Can I use Emacs as pipe-thru formatter?
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Irving Kimura wrote:

> Since, under Unix at least, it's not too difficult for a Perl script
> to pipe a string through an external program, one possible way to
> do what I want to do would be to write an "Emacs pipe" that somehow
> uses javascript-mode.el to pretty print its stdin and spits the
> results to stdout:
> 
>   % cat ugly.js | emacs_js_pretty_printer > pretty.js

Try this:


emacs --batch \
	ugly.js \
	-f javascript-mode \
	--eval '(indent-region (point-min) (point-max) nil)' \
	--eval '(write-file "pretty.js")'

-- 
Kevin Rodgers