Defining Your Home
Part 4 - Writing a Server Service
says ⮞ I use 20x magnification when I code and debug. I use emoji to simplify logs for myself. If you can't handle my code style you can disable most of it on this website by toggling the button in the navbar. Shall duck continue?
Originally written in Bash, but sadly once again I overestimated what heavylifting Bash could handle.
It's now in RUst and I am very happy with the performance.
I will very briefly explain how it works and show some example code. (Please note that the code blocks on this page are just example snippets)
The Rust code is written in a Nix string and is generated upom build time.
Defined devices, automations and other configurations are inserted into variables as json files and loaded into the runtime.
You will have the link to the source code on GitHub at the bottom of this page.
There's basically nothing in the code that needs to be changed if you would like to try it.
If you want to run the service without 'yo' you would simply build it in the zigduck-rs systemd service's preStart definition.
File Structure
Pretty straightforward structure, that's easy to follow.
⮞ View Nix File Structure
# 🦆 says ⮞ Generate automations configuration automationsJSON = builtins.toJSON config.house.zigbee.automations; automationsFile = pkgs.writeText "automations.json" automationsJSON; # 🦆 says ⮞ Dark time enabled flag darkTimeEnabled = if config.house.zigbee.darkTime.enable then "1" else "0"; # 🦆 needz 4 rust devices-json = pkgs.writeText "devices.json" deviceMeta; # 🦆 says ⮞ RUSTY SMART HOME qwack qwack zigduck-rs = pkgs.writeText "zigduck-rs" '' use rumqttc::{MqttOptions, Client, QoS, Event, Incoming}; #🦆... ''; # 🦆 says ⮞ Cargo.toml zigduck-toml = pkgs.writeText "zigduck.toml" '' [package] name = "zigduck-rs" #🦆... ''; environment.variables."ZIGBEE_DEVICES" = deviceMeta; environment.variables."ZIGBEE_DEVICES_FILE" = devices-json; environment.variables."AUTOMATIONS_FILE" = automationsFile; in { systemd.services.zigduck-rs = { serviceConfig = { User = "zigduck"; Group = "zigduck"; Exec = "./target/release/zigduck-rs"; StateDirectory = "zigduck"; StateDirectoryMode = "0755"; }; preStart = '' if [ ! -f "${zigduckDir}/state.json" ]; then echo "{}" > "${zigduckDir}/state.json" fi mkdir -p "${zigduckDir}/timers" mkdir -p src # 🦆 says ⮞ create the source filez yo cat ${zigduck-rs} > src/main.rs cat ${zigduck-toml} > Cargo.toml # 🦆 says ⮞ build ${pkgs.cargo}/bin/cargo generate-lockfile ${pkgs.cargo}/bin/cargo build --release ''; }; systemd.tmpfiles.rules = [ "d /var/lib/zigduck 0755 ${config.this.user.me.name} ${config.this.user.me.name} - -" "d /var/lib/zigduck/timers 0755 ${config.this.user.me.name} ${config.this.user.me.name} - -" "f /var/lib/zigduck/state.json 0644 ${config.this.user.me.name} ${config.this.user.me.name} - -" ];
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