[csw-maintainers] [csw-devel] dynamically generated adm scripts

[Dagobert Michelsen]

Hi Ben,

Am 09.02.2009 um 20:18 schrieb Ben Walton:
> I've mostly completed a feature for GAR that I thought I'd get some
> feedback on.  While putting together one of my packages, I found the
> script to be quite nasty.  It relies on version numbers of the
> package, etc (a maintenance annoyance).  It struck me that it might be
> nice to have GAR generate this script automatically from a 'template'
> thus taking advantage of variables already available to the Makefile
> ($GARVERSION, etc).
>
> What I've put together allows for the definition of functions  
> (possibly
> as extra include files) like this:
>
> define CSWpkgname_postinstall
> #!/bin/sh
>
> echo I'm the postinstall script for $(GARNAME) v$(GARVERSION).
>
> for i in /tmp/*; do
>    echo Found $$i in /tmp;
> done
> endef
>
> This seems to work, but has a few drawbacks.  As with shell snippets
> in regular rules, shell variables must be 'escaped' with $$.  Also,
> due to the way GNU Make handles the 'defined' variables, \n\n* is
> collapsed to \n and any leading \t's are squished.  This makes the
> resulting script less human readable (although the form stored in GAR
> can be as readable as a normal script).
>
> I should note that this would be an additional method for handling
> scripts.  It wouldn't alter the traditional method in any way.  You
> can mix an match to taste.
>
> Are others interested in something like this?
>
> Also, I'm not sure how this would interact with classutils.  I'm not
> familiar at all with the workings there, so pointers as to how this
> would interact in that area are welcome.

This is definitely useful! It would be nice though to
have a more verbatim-type of definition...


Best regards

   -- Dago