dircat 1.0.0

High-performance Rust utility that concatenates and displays directory contents, similar to the C++ DirCat.
Documentation 
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// src/main.rs

use anyhow::Result;
use clap::Parser;
use dircat::cli::Cli;
use dircat::config::ConfigBuilder;
use dircat::errors::Error;
#[cfg(feature = "progress")]
use dircat::progress::IndicatifProgress;
use dircat::progress::ProgressReporter;
use dircat::run;
use dircat::signal::setup_signal_handler;
use std::sync::Arc;

fn main() -> Result<()> {
    env_logger::Builder::from_env(env_logger::Env::default().default_filter_or("warn")).init();

    // --- Setup ---
    let cli_args = Cli::parse();

    // Decide whether to show a progress bar. Show it if stderr is a TTY.
    let progress_reporter: Option<Arc<dyn ProgressReporter>> = {
        #[cfg(feature = "progress")]
        {
            if atty::is(atty::Stream::Stderr) {
                Some(Arc::new(IndicatifProgress::new()))
            } else {
                None
            }
        }
        #[cfg(not(feature = "progress"))]
        {
            None
        }
    };

    // --- Configuration & Execution ---
    let config = ConfigBuilder::from_cli(cli_args).build()?;
    let token = setup_signal_handler()?;

    let result = run(&config, &token, progress_reporter);

    // --- Error Handling ---
    if let Err(e) = result {
        match e {
            Error::Interrupted => {
                eprintln!("\nOperation cancelled.");
                std::process::exit(130);
            }
            Error::NoFilesFound => {
                eprintln!("dircat: No files found matching the specified criteria.");
                return Ok(());
            }
            _ => {
                eprintln!("Error: {}", e);
                std::process::exit(1);
            }
        }
    }

    Ok(())
}