Macro run_node_simple 

macro_rules! run_node_simple {
    ($node_type:ty, $node_name:expr, $env_var:expr, $config_file:expr, $env_prefix:expr) => { ... };
}

Run a node with automatic config loading and context creation

This macro eliminates boilerplate by automatically handling:

• Config loading with fallback (from env var, file, or default)
• Context creation with node name
• Calling run_node with proper types

Arguments

• $node_type - The NodeImpl type (e.g., CameraFakeNode)
• $node_name - The node name string (e.g., “camera_fake”)
• $env_var - Environment variable for config file path (e.g., “CAMERA_CONFIG”)
• $config_file - Default config file path (e.g., “config/drivers/realsense_d435.json”)
• $env_prefix - Environment variable prefix for config overrides (e.g., “CAMERA”)

Example

use mecha10::prelude::*;

#[derive(Debug)]
struct CameraFakeNode {
    config: CameraConfig,
}

#[derive(Debug, Clone, Deserialize, Serialize, Default)]
struct CameraConfig {
    fps: f32,
}

#[async_trait]
impl NodeImpl for CameraFakeNode {
    type Config = CameraConfig;

    async fn init(config: Self::Config) -> Result<Self> {
        Ok(Self { config })
    }

    async fn run(&mut self, ctx: &Context) -> Result<()> {
        // Node logic here
        Ok(())
    }
}

// Instead of 13 lines:
// pub async fn run() -> Result<()> {
//     info!("Starting fake camera driver");
//     let config = load_config_with_fallback(
//         "CAMERA_CONFIG",
//         "config/drivers/realsense_d435.json",
//         "CAMERA",
//         Some(CameraConfig::default())
//     )?;
//     let ctx = Context::new("camera_fake");
//     run_node::<CameraFakeNode>(config, ctx).await
// }

// Simply use 1 line:
run_node_simple!(
    CameraFakeNode,
    "camera_fake",
    "CAMERA_CONFIG",
    "config/drivers/realsense_d435.json",
    "CAMERA"
);