[pulseaudio-discuss] [PATCH 0/5] CLI meta commands

Peter Meerwald pmeerw at pmeerw.net
Tue May 5 10:17:30 PDT 2015

Hallo Tanu,

> > > > patch 4 implements a new .ifenv CLI meta command I found useful: executes commands
> > > > only when an environment variable exists (optionally with a certain value)
> > > 
> > > Can you elaborate, what problem you solve with environment variables? Is
> > > there no reasonable alternative? Here is someone else's attempt at
> > > explaining why environment variables are not nice:
> > > http://peterlyons.com/problog/2010/02/environment-variables-considered-harmful
> > 
> > I'm sure there are different ways of doing things...
> > 
> > I found it useful to conditionally load either module A or module B (or 
> > the same module with different parameters) in a sequence of modules that get 
> > loaded in a custom script.pa
> > 
> > I could have split up my script.pa into scriptA.pa and script.B and 
> > specify using pulseaudio's -F parameter, and use .include's to avoid 
> > duplication; or I could have scripted the PA commands elsewhere
> Is script.pa with the conditional part something that you only use on
> your own machine to easily switch between setups, or something that you
> use to manage product variants? I wouldn't want to encourage using
> environment variables to manage configuration variants in products or
> distros, but I don't see much harm in allowing that for local tinkering,
> and I don't have alternative solutions that would be equally easy to
> use.

I take this as a semi-Ack, let's see if there are other opinions :)

I'm using .ifenv for test scripts I run to check different setups; I found 
it useful...
> For handling configuration variation in distributions, I'd like to get
> support for loading configuration snippets from /etc/pulse/default.pa.d/
> (the same applies to other configuration files too, and actually I'd
> like to move configuration away from the scriptable part to declarative
> configuration files). Different variants would ship the variant-specific
> part in a separate configuration package.
> > I have no strong opinion about that added feature; I guess one cannot make 
> > the point that it is absolutely essential -- but the same thing can be 
> > said about PA's script in general
> > 
> > are you OK with the cleanups/fixes in patches 1 and 2?
> Patch 1 looks good. I commented on patch 2 in a separate mail.

applied patch 1 and posted a v2 of patch 2 following your suggestion

thanks! p.


Peter Meerwald
+43-664-2444418 (mobile)

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