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From:	karl AT aspodata DOT se
To:	geda-user AT delorie DOT com
Subject:	Re: [geda-user] What Xorn does, and why it does it like that
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Comments:	In-reply-to Roland Lutz <rlutz AT hedmen DOT org>
	message dated "Sat, 02 Jan 2016 19:14:28 +0100."
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Date:	Sat, 2 Jan 2016 20:02:19 +0100 (CET)
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Roland Lutz:
> On Sat, 2 Jan 2016, karl AT aspodata DOT se wrote:
> > I would like to test xorn, I did "git pull -a" and found that
> > there are two xorn branches. Which one should I use ?
> >
> > $ git branch -a | grep xorn
> >  remotes/origin/home/rlutz/xorn-integration
> >  remotes/origin/xorn
> 
> Xorn has already been merged into the master banch.  The branch 'xorn' 
> reflects the current 'master' branch of the xorn repository, and 
> 'home/rlutz/xorn-integration' was a temporary branch which should be 
> deleted.

Ok, found it, geda-gaf/xorn, just under the nose so to say...

The README says 

$ autoreconf -i
autopoint: *** The AM_GNU_GETTEXT_VERSION declaration in your configure.ac
               file requires the infrastructure from gettext-0.18.2 but this version
               is older. Please upgrade to gettext-0.18.2 or newer.
autopoint: *** Stop.
autoreconf: autopoint failed with exit status: 1

so I'll look into that tomorrow...

> > And for the exercise, I have an program I'd like to implement as you
> > probably have seen in the mail thread of 'should we broaden scope of
> > libgeda':
> >
> > Given a sch file, collect all sym files to a save directory.
> >
> > So, in xorn, which bindings are available, c and python, any more ?
> 
> For this program, you'll want to load a schematic file including all 
> referenced and embedded symbol files.  This means you need:
> 
> * libxornstorage (a C library for which Python bindings exist)
> * the symbol library mechanism (a Python module called 'xorn.geda.clib')
> * the function 'read' from the Python module 'xorn.geda.read'
> 
> Right now, you'll either have to write the program in Python or embed a 
> Python interpreter into your C program in order to call the necessary 
> Python functions.  I'm planning to add a back-binding library so you can 
> call the functions implemented in Python as C functions (or in any other 
> language for which there are bindings), but I didn't find the time to do 
> so yet.
> 
> The process would be about as follows:
> * Add a DirectorySource for each directory to the symbol library (you 
> might want to re-use the function 'symbol_library_search' from 
> xorn/src/command/netlist.py).
> * Load the schematic while passing 'load_symbols = True' to the function
> 'xorn.geda.read.read'.
> * Iterate over all Component objects, writing the prim_objs of each unique 
> symbol to the target directory.
> 

Soo, currently it is python that is available.

Regards,
/Karl Hammar

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