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From: "Britton Kerin (britton DOT kerin AT gmail DOT com) [via geda-user AT delorie DOT com]" <geda-user AT delorie DOT com>
Date: Sat, 5 Dec 2020 09:35:03 -0900
Message-ID: <CAC4O8c_truL-as+Ho58TCqdm+m8y2dVUgK8Ji7UR=Jr_x0F3Xw@mail.gmail.com>
Subject: Re: [geda-user] automatically create a .sch file containing a single component?
To: geda-user AT delorie DOT com
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Reply-To: geda-user AT delorie DOT com

On Sat, Dec 5, 2020 at 12:42 AM Vladimir Zhbanov (vzhbanov AT gmail DOT com)
[via geda-user AT delorie DOT com] <geda-user AT delorie DOT com> wrote:
>
> Hi Britton,
>
> On Thu, Dec 03, 2020 at 11:12:41AM -0900, Britton Kerin (britton DOT kerin AT gmail DOT com) [via geda-user AT delorie DOT com] wrote:
> > Another small thing I'd like to automate is my setup for validating
> > footprints of symbols.  I use heavy symbols with footprints associated
> > with each part.  To check a symbol I first create a .sym and .fpt,
> > then create a file checkfpt.sch which contains just the .sym, then use
> > gsh2pcb to create a pcb file containing the symbol, and launch pcb to
> > take a look at it.
> >
> > The part that's pointlessly interactive is the creation of the .sch
> > file.  I have to have gschem launched and manually add the symbol.
> >
> > I'd like to do one of these instead:
> >
> > * create an sch containing just the sch using some batch mode op
> >
> > * just create the sch by script.  but I don't get why some text
> > elements (refdes=, device=) end up
> >   repeated in the .sch file and other stay in the element.  what
> > distinguishes these elements?
> >
> > * create the pcb file directly.  sort of a hassle but probably what
> > I'll do unless there's a better way,
> >   a little weird in my case since I have a lot of footprints using a
> > text library of my own
> >
> > * view the footprint file in a way that shows the refdes.  I know it
> > possible to view footprints directly
> >   with pcb, the only problem with this is it doesn't show the refdes.
> > Is there some way to make it
> >   do so?
> >
> > Britton
>
> I'm not sure if I understood anything correctly.  Still I propose
> my solution of the problem you mentioned as I understood it.
>
> The following Scheme script creates a schematic from one symbol:
>
> =======================================8<=======================================
> (use-modules (lepton page)
>              (lepton object)
>              (srfi srfi-1))
>
> ;;; First argument in program arguments is the name of the script
> ;;; itself.
> (define file-name (second (program-arguments)))
> (define symbol-name (third (program-arguments)))
>
> (define (save-page page)
>   (display (page->string page)))
>
> (let ((page (make-page file-name)))
>   (page-append! page (make-component/library symbol-name '(0 . 0) 0 #f #f))
>     (with-output-to-file file-name (lambda () (save-page page))))
> =======================================>8=======================================
>
> Its usage is simple:
>   lepton-cli shell -s ./schematic-from-symbol.scm /tmp/schematic.sch resistor-1.sym
>
> A call for lepton-schpcb could be added in the script as well
> using '(system "lepton-sch2pcb" arg1 arg2 ...)', though I omit
> this as not very significant here.  Another way would be to use
> some sh scripting for that.
>
> If you still use geda-gaf the above script should be changed a bit
> (I suspect nothing changed in Scheme code there since 1.9.2), just
> use '(geda object)' instead of '(lepton object)', etc, the 'gaf'
> command instead of 'lepton-cli', and 'gsch2pcb' instead of
> 'lepton-sch2pcb'.

Thanks.  This is probably much more correct and general than my
hastilyassembled solution and I've added a pointer back to it so I can
try it when mine breaks :)

Britton