main.rs
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main.rs
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	use clap::Parser;

	use crate::registry::get_registry;
	use crate::language_parser::Language;

	mod registry;
	mod language_parser;

	#[derive(Debug, Parser)]
	#[command(name = "language-subtag-registry-datasource")]
	#[clap(author="Nasqueron project", version, about="Download and print language subtag registry", long_about=None)]
	pub struct Args {
	/// The format string to use
	#[arg(long, short = 'f')]
	format: String,

	/// The aggregation separator
	#[arg(long, short = 'a', default_value = " / ")]
	aggregation_separator: String,

	/// The path to the registry source
	#[arg(long, short = 's')]
	source: Option<String>,

	/// Restricts parsing to language type
	#[arg(long, short = 'l', default_value_t = false)]
	languages_only: bool,
	}

	#[tokio::main]
	async fn main() {
	let args = Args::parse(); // Will exit if argument is missing or --help/--version provided.

	let document = get_registry(args.source).await
	.expect("Can't read or fetch registry");

	for language in Language::parse_document(&document, args.languages_only) {
	println!("{}", language.format(&args.format, &args.aggregation_separator));
	}
	}