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Subject:	Re: [geda-user] Back annotation (was: developer excitement?)
From:	John Doty <jpd AT noqsi DOT com>
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Date:	Thu, 9 Jul 2015 08:25:51 -0600
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On Jul 9, 2015, at 8:06 AM, Roland Lutz <rlutz AT hedmen DOT org> wrote:

> On Thu, 9 Jul 2015, John Doty wrote:
>> If you’re just making changes until a diff shows nothing, it doesn’t matter whether you make them upstream or downstream. Just quit when you have a match!
> 
> This sounds reasonable to me.  So the common denominator is to load a "target netlist" into gschem and show the differences between the current state and the target state, either by highlighting them in the schematic or by showing a diff?  This shouldn't be too difficult to implement.

Not into gschem. Keep gschem clean, please. I just displayed a diff in a terminal window.

> 
>> nearly all of the unnamed nets changed their names in this case
> 
> A clever diff algorithm would have to compare connectivities independently of net names, so the remaining net name changes could easily be ignored.

For this purpose, you just need to remove the net names from the netlist before taking the diff. However, there are other cases (like SPICE simulation) where the instability of anonymous net names causes more trouble.

John Doty              Noqsi Aerospace, Ltd.
http://www.noqsi.com/
jpd AT noqsi DOT com

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