[PD] Manage JACK connections from Pd

[Allister Sinclair]

> Passing such a symbol to jack_connect through [shell] ends with:
>
>   ERROR ardour:send\ 1/audio_out\ 1 not a valid port

But [shell] doesn't need symbols, you can pass a plain message to it such
as [ardour:send 7/audio_in 1( without escaping spaces, with perhaps a [list
trim]
Does that not work ?


Le ven. 26 mars 2021 à 16:06, Roman Haefeli <reduzent at gmail.com> a écrit :

> On Fri, 2021-03-26 at 16:00 +0100, Roman Haefeli wrote:
> > On Fri, 2021-03-12 at 19:20 +0100, Allister Sinclair wrote:
> > > I don't know if an external exists for that but you could use
> > > command
> > > lines from pd.
> > > (On linux I would use jack_connect and jack_disconnect commands
> > > through the [ggee/shell] object.
> >
> > Now, that [ggee/shell] reports the proper exit code, this seemed a
> > feasible approach. Not for long, though. There is no way around Pd
> > prepending each symbol with a backslash. So, it is impossible to
> > address a port like:
> >
> >   "ardour:send 7/audio_in 1"
> >
> > Passing such a symbol to jack_connect through [shell] ends with:
> >
> >   ERROR ardour:send\ 1/audio_out\ 1 not a valid port
> >
> > I remember a discussion going on github (can't find it right now)
> > about
> > whether the escaping with \ is an implementation detail that
> > shouldn't
> > be exposed to the user or the world outside of Pd. Now, I wonder
> > whether it is [shell] not dealing properly with escaped characters in
> > symbols, or whether the culprit is actually in Pd here.
> >
> > I'm not quite sure how to go on about this.
>
>
> Ironically, when I want to execute the command from a real terminal, I
> need to escape the port names with \:
>
>   jack_connect pure_data:output_1 ardour:A-0/audio_input\ 1
>
> Roman
>
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-- 
Allister Sinclair
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