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feat(bluetooth): get bluetooth devices

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Lucien Cartier-Tilet 2025-05-23 21:09:36 +02:00
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use flake

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/target
/result

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Cargo.toml Normal file
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[package]
name = "pumo-system-info"
version = "0.1.0"
edition = "2024"
authors = ["Lucien Cartier-Tilet <lucien@phundrak.com>"]
license = "GPL-3.0-or-later"
description = "Gather system information in JSON format"
publish = false
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Also add information on how to contact you by electronic and paper mail.
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This program comes with ABSOLUTELY NO WARRANTY; for details type `show w'.
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under certain conditions; type `show c' for details.
The hypothetical commands `show w' and `show c' should show the appropriate
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might be different; for a GUI interface, you would use an "about box".
You should also get your employer (if you work as a programmer) or school,
if any, to sign a "copyright disclaimer" for the program, if necessary.
For more information on this, and how to apply and follow the GNU GPL, see
<https://www.gnu.org/licenses/>.
The GNU General Public License does not permit incorporating your program
into proprietary programs. If your program is a subroutine library, you
may consider it more useful to permit linking proprietary applications with
the library. If this is what you want to do, use the GNU Lesser General
Public License instead of this License. But first, please read
<https://www.gnu.org/licenses/why-not-lgpl.html>.

52
README.md Normal file
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@ -0,0 +1,52 @@
# pumo-system-info
A Rust-based utility for gathering and presenting system information
in JSON format. For now, it only retrieves Bluetooth-related
information.
## Overview
`pumo-system-info` is designed to retrieve detailed information about
connected Bluetooth devices and present it in a structured JSON
format. This utility can be integrated with other tools or scripts for
system monitoring and management. In particular, this tool is meant to
be used with my [eww](https://elkowar.github.io/eww/) configuration.
## Prerequisites
- DBus
- BlueZ (for retrieving Bluetooth-related information)
- Rust (specified in `rustup-toolchain.toml`)
- Nix package manager with flakes (optional, for building and managing
dependencies)
## Installation
1. Clone the repository
```sh
git clone https://labs.phundrak.com/phundrak/pumo-system-info.git
cd pumo-system-info
```
2. Build the project
1. With Nix
```sh
nix build
./result/bin/pumo-system-info
```
2. Without Nix
```sh
cargo build --release
./target/release/pumo-system-info
```
## Contributing
Contributions are welcome! Please fork the repository and submit a
pull request with your changes. Ensure that your commits follow the
recommendations of [Conventional
Commits](https://www.conventionalcommits.org/).
## License
This project is licensed under the GPL-3 license. See the
[LICENSE](LICENSE) file for more details.

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flake.lock generated Normal file
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{
"nodes": {
"flake-utils": {
"inputs": {
"systems": "systems"
},
"locked": {
"lastModified": 1731533236,
"narHash": "sha256-l0KFg5HjrsfsO/JpG+r7fRrqm12kzFHyUHqHCVpMMbI=",
"owner": "numtide",
"repo": "flake-utils",
"rev": "11707dc2f618dd54ca8739b309ec4fc024de578b",
"type": "github"
},
"original": {
"owner": "numtide",
"repo": "flake-utils",
"type": "github"
}
},
"nixpkgs": {
"locked": {
"lastModified": 1747744144,
"narHash": "sha256-W7lqHp0qZiENCDwUZ5EX/lNhxjMdNapFnbErcbnP11Q=",
"owner": "nixos",
"repo": "nixpkgs",
"rev": "2795c506fe8fb7b03c36ccb51f75b6df0ab2553f",
"type": "github"
},
"original": {
"owner": "nixos",
"ref": "nixos-unstable",
"repo": "nixpkgs",
"type": "github"
}
},
"root": {
"inputs": {
"flake-utils": "flake-utils",
"nixpkgs": "nixpkgs",
"rust-overlay": "rust-overlay"
}
},
"rust-overlay": {
"inputs": {
"nixpkgs": [
"nixpkgs"
]
},
"locked": {
"lastModified": 1747967795,
"narHash": "sha256-76s4jDRbQzxRO+5y8ilMp5V30qVgY9R6n8U7aOap8ig=",
"owner": "oxalica",
"repo": "rust-overlay",
"rev": "f1d5bfa8c692cacd798a3e1fb93d54c1b9ac701a",
"type": "github"
},
"original": {
"owner": "oxalica",
"repo": "rust-overlay",
"type": "github"
}
},
"systems": {
"locked": {
"lastModified": 1681028828,
"narHash": "sha256-Vy1rq5AaRuLzOxct8nz4T6wlgyUR7zLU309k9mBC768=",
"owner": "nix-systems",
"repo": "default",
"rev": "da67096a3b9bf56a91d16901293e51ba5b49a27e",
"type": "github"
},
"original": {
"owner": "nix-systems",
"repo": "default",
"type": "github"
}
}
},
"root": "root",
"version": 7
}

50
flake.nix Normal file
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{
description = "System information in JSON format for eww";
inputs = {
nixpkgs.url = "github:nixos/nixpkgs/nixos-unstable";
flake-utils = {
url = "github:numtide/flake-utils";
inputs.nixpkgs.follows = "nixpkgs";
};
rust-overlay = {
url = "github:oxalica/rust-overlay";
inputs.nixpkgs.follows = "nixpkgs";
};
};
outputs = { self, nixpkgs, flake-utils, rust-overlay }:
flake-utils.lib.eachSystem ["x86_64-linux"] (system:
let
overlays = [ (import rust-overlay) ];
pkgs = import nixpkgs { inherit system overlays; };
rustVersion = (pkgs.rust-bin.fromRustupToolchainFile ./rustup-toolchain.toml);
rustPlatform = pkgs.makeRustPlatform {
cargo = rustVersion;
rustc = rustVersion;
};
appName = "pumo-system-info";
appRustBuild = rustPlatform.buildRustPackage {
pname = appName;
version = "0.1.0";
src = ./.;
cargoLock.lockFile = ./Cargo.lock;
doCheck = true;
};
in {
packages.rustPackage = appRustBuild;
defaultPackage = appRustBuild;
devShell = with pkgs; mkShell {
buildInputs = [
bacon
cargo
cargo-deny
cargo-msrv
cargo-tarpaulin
just
rustVersion
];
};
}
);
}

4
rustup-toolchain.toml Normal file
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[toolchain]
channel = "1.87.0"
components = [ "rustfmt", "rust-src", "clippy", "rust-analyzer" ]
profile = "default"

51
src/bluetooth.rs Normal file
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use anyhow::Result;
use dbus::arg;
use std::collections::HashMap;
use std::time::Duration;
#[derive(Default, serde::Serialize)]
pub struct BluetoothInfo {
pub name: String,
pub address: String,
pub alias: String,
pub connected: bool,
pub icon: String,
pub battery: Option<u64>,
}
impl BluetoothInfo {
fn new(from: HashMap<String, arg::PropMap>) -> Option<Self> {
let device = from.get("org.bluez.Device1")?;
let mut result = Self {
name: device.get("Name")?.0.as_str()?.to_owned(),
address: device.get("Address")?.0.as_str()?.to_owned(),
alias: device.get("Alias")?.0.as_str()?.to_owned(),
connected: matches!(&device.get("Connected")?.0.as_u64(), Some(1)),
icon: device.get("Icon")?.0.as_str()?.to_owned(),
battery: None,
};
if let Some(battery) = from.get("org.bluez.Battery1") {
result.battery = Some(battery.get("Percentage")?.0.as_u64()?);
}
Some(result)
}
}
pub fn get_all_bluetooth_devices(
connection: dbus::blocking::Connection,
) -> Result<Vec<BluetoothInfo>> {
let proxy = connection.with_proxy("org.bluez", "/", Duration::from_millis(5000));
let (result,): (HashMap<dbus::Path<'static>, HashMap<String, arg::PropMap>>,) = proxy
.method_call(
"org.freedesktop.DBus.ObjectManager",
"GetManagedObjects",
(),
)
.unwrap_or_default();
let result: Vec<BluetoothInfo> = result
.into_iter()
.filter(|(_, value)| value.contains_key("org.bluez.Device1"))
.flat_map(|(_, value)| BluetoothInfo::new(value))
.collect();
Ok(result)
}

18
src/main.rs Normal file
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use anyhow::Result;
use bluetooth::BluetoothInfo;
use dbus::blocking::Connection;
mod bluetooth;
#[derive(serde::Serialize)]
struct SystemInfo {
bluetooth: Vec<BluetoothInfo>,
}
fn main() -> Result<()> {
let connection = Connection::new_system()?;
let bluetooth = bluetooth::get_all_bluetooth_devices(connection)?;
let info = SystemInfo { bluetooth };
println!("{}", serde_json::to_string(&info)?);
Ok(())
}