csskit 0.0.23

Refreshing CSS!
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use crate::{CliError, CliResult, GlobalConfig, InputArgs};
use bumpalo::Bump;
use clap::Args;
use css_ast::{CssAtomSet, StyleSheet};
use css_lexer::Lexer;
use css_parse::{CursorCompactWriteSink, Parser, ToCursors};
use std::io::Read;

/// Convert one or more CSS files into production ready CSS.
#[derive(Debug, Args)]
#[command(arg_required_else_help(true))]
pub struct Build {
	#[command(flatten)]
	content: InputArgs,

	/// Where to save files.
	#[arg(short, long, group = "output_file", value_parser)]
	output: Option<String>,
}

impl Build {
	pub fn run(&self, _config: GlobalConfig) -> CliResult {
		let Build { content, output } = self;
		let bump = Bump::default();
		let mut str = String::new();
		let start = std::time::Instant::now();
		for (file_name, mut source) in content.sources()? {
			let mut source_string = String::new();
			source.read_to_string(&mut source_string)?;
			let source_text = source_string.as_str();
			let lexer = Lexer::new(&CssAtomSet::ATOMS, source_text);
			let mut parser = Parser::new(&bump, source_text, lexer);
			let result = parser.parse_entirely::<StyleSheet>();
			if result.output.is_some() {
				let mut stream = CursorCompactWriteSink::new(source_text, &mut str);
				result.with_trivia().to_cursors(&mut stream);
			} else {
				for compact_err in result.errors {
					let report = crate::commands::format_diagnostic_error(&compact_err, &source_string, file_name);
					println!("{report}");
				}
				Err(CliError::ParseFailed)?;
			}
		}
		if let Some(file) = output {
			std::fs::write(file, str.as_bytes())?;
		} else {
			println!("{str}");
		}
		eprintln!("Slurped up CSS in {:?}! Neat!", start.elapsed());
		Ok(())
	}
}