# waybar-collectd

A Waybar graphing utility inspired by the Gnome 2 Panel system indicator. It uses collectd's `unixsock` plugin to gather metrics and renders images for the `waybar-image` plugin.

## Installation
```bash
cargo install --git https://forgejo.cerno.ch/handy/waybar-collectd.git
```

## Configuring collectd
Install and configure `collectd` with the `unixsock` plugin. For per-second updates, adjust the sampling interval. Ensure `collectd` is enabled to start on boot.

**Example config (`/etc/collectd.d/waybar.conf`):**
```conf
Interval 1  # Sample data every 1 second

LoadPlugin unixsock
<Plugin unixsock>
	SocketPerms "0666"
</Plugin>


# Enable the plugins you want to use
LoadPlugin cpu
LoadPlugin memory
LoadPlugin disk
LoadPlugin network
```

```bash
sudo systemctl enable --now collectd
```

## Configuring waybar-collectd
Define your graphs and data sources in `config.toml`. To ensure the daemon runs on login, use a user systemd unit or your WM configuration.

### User systemd unit example
`~/.config/systemd/user/waybar-hwmonitor-daemon.service`
```ini
[Unit]
Description=Data collection daemon for waybar hw monitor

[Service]
Type=simple
ExecStart=%h/.cargo/bin/waybar-collectd --config %h/.config/waybar/modules/waybar-collectd-config.toml
Restart=on-failure
RestartSec=2s

[Install]
WantedBy=default.target
```

## Configuring Waybar
Add a module for each graph to your Waybar config. Ensure the `size` matches the rendered image dimensions.

**Example config (`~/.config/waybar/config`):**
```json
[
	{
    "layer": "bottom",
    "position": "top",
		"modules-center": ["image#net", "image#disk", "image#mem", "image#cpu"],
		"height": 24,
    "image#cpu": {
        "path": "/tmp/waybar-graphs/cpu.png",
        "size": 120,
        "interval": 1
    },
    "image#mem": {
        "path": "/tmp/waybar-graphs/mem.png",
        "size": 120,
        "interval": 1
    },
    "image#disk": {
        "path": "/tmp/waybar-graphs/disk.png",
        "size": 120,
        "interval": 1
    },
    "image#net": {
        "path": "/tmp/waybar-graphs/net.png",
        "size": 120,
        "interval": 1
    }		
	}
]
```