Teemu Ikonen authored 1 year ago and Clayton Craft committed 1 year ago

The driver is called 'mm' in config.

Requires the dbus module.

[ci:skip-build] already built successfully in CI

This is basically unneeded now that gnss-share can accept writes to its
socket.

Many changes, squashed into 1 commit to make bisecting possible

- server: This also removes the stop channel, it was janky. Accept will
  block anyways so this wasn't really a good way to stop the server

- gnss/stm: rename Stm --> StmDevice, it's more descriptive!
- gnss/stm: use pubsub internally
- gnss/stm: startScan is dropped since it is an unnecessary abstraction
  over readlines

- gnss: add Gnss struct, this implements pubsub.Subscriber, and will
  essentially be a wrapper around a driver, allowing multiple things to
  read/write to it concurrently.
- gnss: change GnssDriver.Start definition

- gnss-share: drop pool stuff, initialize driver using new interface

Shorter, and nicer.

The underscore is annoying since it's not very common for exes and
packages to have underscores in them. It was a mistake from the start.

I'm still confused about which is the correct term here in this context,
but ephemeris is shorter :D

Stm was renamed to StmGnss to allow naming a new interface, Stm.

StmGnss and StmSerial implement the Stm interface.

When running in "server" mode, the app will load agps data upon
receiving USR1, and store agps data upon receiving USR2, then continue
running in server mode afterwards. Connected clients should stay
connected, they just won't receive anything while the load/store is
taking place.

also rename 'daemon' mode to 'server' mode, since this isn't really a
sysV(or systemd)-style daemon

This is a total re-write in Go, and aims to address the following
problems with the python version of this app:

- reduce idle CPU usage when no clients are connected

- reduce overall install size (including dependencies)

- simplify concurrency usage in the app (Go has it built into the
  language, python+Trio is neat but harder to grok)

- incorporate various fixes from Sebastian Krzyszkowiak