[bug#54379] [PATCH] gnu: linux: update PipeWire & WirePlumber

[Brendan Tildesley]

On 30/3/22 14:23, fesoj000 wrote:
> On 3/30/22 3:01 AM, Brendan Tildesley wrote:
> > 1. Add "-Dsysconfdir=/etc" to configure-flags so /etc/pipewire is 
> > used instead of the output store path.
> How do you use pipewire? The store output configuration is the package 
> default. If you need some special
> settings you can use "~/.config/pipewire/" to overwrite the settings 
> you want to change.
I set PIPEWIRE_CONFIG_DIR=/etc/pipewire in /etc/environment and made etc 
services to symink all the config
files there. but I think i will get rid of that in favour of sysconfdir.
> So far it was perfect to have the immutable default config in the 
> store and reference it for your own
> settings. Especially after a breaking change in pipewire, this 
> immutable config in the store path can be
> very valuable to get a working setup again.
>
> I do not care what the default config directory is, but i would like 
> to keep the default config as part
> of the package.
>
> BR
You don't need to worry about that because the default config is in 
share/ not etc/. There is nothing in the etc/ besides ld.so.cache

This is how pipewire accesses config without sysconfigdir set:

b@jiu ~/code/guix [env]$ strace 
/gnu/store/kvyhx5i5a6i63iihp20wj3yikhvf4si7-pipewire-0.3.48/bin/pipewire 
2>&1|rg '^access'
access("/etc/ld.so.preload", R_OK)      = -1 ENOENT (No such file or 
directory)
access("/home/b/.config/pipewire/pipewire.conf", R_OK) = -1 ENOENT (No 
such file or directory)
access("/home/b/.config/pipewire/pipewire.conf", R_OK) = -1 ENOENT (No 
such file or directory)
access("/gnu/store/kvyhx5i5a6i63iihp20wj3yikhvf4si7-pipewire-0.3.48/etc/pipewire/pipewire.conf", 
R_OK) = -1 ENOENT (No such file or directory)
access("/gnu/store/kvyhx5i5a6i63iihp20wj3yikhvf4si7-pipewire-0.3.48/share/pipewire/pipewire.conf", 
R_OK) = 0
access("/gnu/store/kvyhx5i5a6i63iihp20wj3yikhvf4si7-pipewire-0.3.48/share/pipewire/pipewire.conf.d", 
R_OK) = -1 ENOENT (No such file or directory)
access("/gnu/store/kvyhx5i5a6i63iihp20wj3yikhvf4si7-pipewire-0.3.48/etc/pipewire/pipewire.conf.d", 
R_OK) = -1 ENOENT (No such file or directory)
access("/home/b/.config/pipewire/pipewire.conf.d", R_OK) = -1 ENOENT (No 
such file or directory)
access("/home/b/.config/pipewire/pipewire.conf.d", R_OK) = -1 ENOENT (No 
such file or directory)

setting it just makes it do this:

b@jiu ~ [env]$ strace pipewire 2>&1|grep '^access'
access("/etc/ld.so.preload", R_OK)      = -1 ENOENT (No such file or 
directory)
access("/home/b/.config/pipewire/pipewire.conf", R_OK) = -1 ENOENT (No 
such file or directory)
access("/home/b/.config/pipewire/pipewire.conf", R_OK) = -1 ENOENT (No 
such file or directory)
access("/etc/pipewire/pipewire.conf", R_OK) = -1 ENOENT (No such file or 
directory)
access("/gnu/store/p7wpq9axacrzk43whbvg6r4f3v0bkyvz-pipewire-0.3.48/share/pipewire/pipewire.conf", 
R_OK) = 0
access("/gnu/store/p7wpq9axacrzk43whbvg6r4f3v0bkyvz-pipewire-0.3.48/share/pipewire/pipewire.conf.d", 
R_OK) = -1 ENOENT (No such file or directory)
access("/etc/pipewire/pipewire.conf.d", R_OK) = -1 ENOENT (No such file 
or directory)
access("/home/b/.config/pipewire/pipewire.conf.d", R_OK) = -1 ENOENT (No 
such file or directory)
access("/home/b/.config/pipewire/pipewire.conf.d", R_OK) = -1 ENOENT (No 
such file or directory)

So it allows for global config to be set in /etc without 
PIPEWIRE_CONFIG_DIR. Note that PIPEWIRE_CONFIG_DIR isn't practical as a 
default

because it sets the /only/ config dir and prevents any lookup in home 
.config.