Function exec_process 

pub fn exec_process<F>(cmd: Command, f: F) -> Cmd
where
    F: Fn(Result<Output, Error>) -> Msg + Send + 'static,

Creates a command that executes an external process.

This command spawns an external process asynchronously and returns a message produced by the provided closure with the process’s output. The process runs in the background and doesn’t block the UI.

Arguments

• cmd - The std::process::Command to execute
• f - A closure that processes the command output and returns a Msg

Returns

A command that executes the external process

Examples

use bubbletea_rs::{command, Model, Msg};
use std::process::Command;

#[derive(Debug)]
struct GitStatusMsg(String);

struct MyModel {
    git_status: String,
}

impl Model for MyModel {
    fn init() -> (Self, Option<command::Cmd>) {
        let model = Self { git_status: String::new() };
        // Run git status command
        let mut cmd = Command::new("git");
        cmd.arg("status").arg("--short");
         
        let exec_cmd = command::exec_process(cmd, |result| {
            match result {
                Ok(output) => {
                    let status = String::from_utf8_lossy(&output.stdout).to_string();
                    Box::new(GitStatusMsg(status)) as Msg
                }
                Err(e) => {
                    Box::new(GitStatusMsg(format!("Error: {}", e))) as Msg
                }
            }
        });
        (model, Some(exec_cmd))
    }

    fn update(&mut self, msg: Msg) -> Option<command::Cmd> {
        if let Some(GitStatusMsg(status)) = msg.downcast_ref::<GitStatusMsg>() {
            self.git_status = status.clone();
        }
        None
    }
     
    fn view(&self) -> String {
        format!("Git status:\n{}", self.git_status)
    }
}