📣 Crier

Simple push notification tool. Works on LAN (TCP) or across the internet (MQTT).

Install

cargo build --release
# Binary: ./target/release/crier

Usage

Direct Mode (TCP)

Linux:
crier listen 0.0.0.0:5555 -m 'notify-send "Alert" "{}"'

Windows:
crier listen 0.0.0.0:5556 -m "msg * {}"

crier send 192.168.1.10:5555 -m "Build complete!"

Relay Mode (MQTT)

Works across NAT/firewalls - no public IP needed!

crier listen --relay test.mosquitto.org -t mybuilds -m 'notify-send "Build" "{}"'
crier send --relay test.mosquitto.org -t mybuilds -m "Build complete!"

Using Presets

Define presets in ~/.config/crier.yml:

mybuilds:
  relay: test.mosquitto.org
  topic: ci/myproject
  auth: secrettoken
  message: 'notify-send "Build" "{}"'

local:
  addr: "0.0.0.0:5555"
  auth: localpass
  message: 'notify-send "Local" "{}"'

Then use with -p:

# Listen using preset
crier listen -p mybuilds

# Send using preset (override message)
crier send -p mybuilds -m "Build passed!"

Authentication

# TCP mode
crier listen 0.0.0.0:5555 -m 'echo "{}"' --auth secret123
crier send host:5555 -m "Hello" --auth secret123

# MQTT mode
crier listen --relay test.mosquitto.org -t topic --auth secret -m 'echo "{}"'
crier send --relay test.mosquitto.org -t topic --auth secret -m "Hello"

Examples

Build notifications

# Dev machine
crier listen -p mybuilds

# Build server
make && crier send -p mybuilds -m "✓ Build passed"

Custom commands

crier listen 0.0.0.0:5555 -m 'paplay /usr/share/sounds/complete.oga'
crier listen 0.0.0.0:5555 -m 'echo "[$(date)] {}" >> ~/crier.log'
crier listen 0.0.0.0:5555 -m './on-message.sh "{}"'

Config File

Location: ~/.config/crier.yml

preset_name:
  addr: "0.0.0.0:5555"      # TCP address (optional)
  relay: test.mosquitto.org  # MQTT broker (optional)
  port: 1883                 # MQTT port (default: 1883)
  topic: my/topic            # MQTT topic
  auth: secrettoken          # Auth token
  message: 'echo "{}"'       # Command template

Options

SUBCOMMANDS:
  listen                    Listen for messages
  send                      Send a message

GLOBAL OPTIONS:
  -c, --config <FILE>       Config file path (default: ~/.config/crier.yml)
  -h, --help                Print help
  -V, --version             Print version

COMMON OPTIONS:
  -p, --preset <NAME>       Use preset from config file
  -m, --message <MESSAGE>   Command template (listen) or message (send)
  -a, --auth <AUTH>         Authentication token

MQTT MODE:
  --relay <BROKER>          MQTT broker address (e.g., test.mosquitto.org)
  --port <PORT>             MQTT broker port (default: 1883)
  -t, --topic <TOPIC>       MQTT topic

TCP MODE:
  <ADDR>                    Bind address (listen) or target address (send)

License

MIT