mtf 0.3.8

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use {
    anyhow::{Result, anyhow},
    clap::Parser,
    clap_cargo::style::CLAP_STYLING,
    mtf::process,
    std::path::PathBuf,
};

#[derive(Parser)]
#[command(about, version, max_term_width = 80, styles = CLAP_STYLING)]
struct Args {
    /// Input file(s)
    #[arg(value_name = "PATH")]
    input_files: Vec<PathBuf>,
}

fn main() -> Result<()> {
    let args = Args::parse();
    if args.input_files.is_empty() {
        process_stdin()?;
    } else {
        for input_file in &args.input_files {
            if input_file.display().to_string() == "-" {
                process_stdin()?;
            } else {
                match std::fs::read_to_string(input_file) {
                    Ok(input) => {
                        print!("{}", process(&input)?);
                    }
                    Err(e) => {
                        return Err(anyhow!("Could not read `{}` ({e})", input_file.display()));
                    }
                }
            }
        }
    }
    Ok(())
}

fn process_stdin() -> Result<()> {
    print!("{}", process(&std::io::read_to_string(std::io::stdin())?)?);
    Ok(())
}