mirror of
https://github.com/swc-project/swc.git
synced 2024-12-24 22:22:34 +03:00
86 lines
2.3 KiB
Rust
86 lines
2.3 KiB
Rust
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use std::{env::args, path::Path};
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use swc_common::{input::SourceFileInput, sync::Lrc, Mark, SourceMap};
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use swc_ecma_codegen::text_writer::JsWriter;
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use swc_ecma_minifier::{
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optimize,
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option::{ExtraOptions, MinifyOptions},
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};
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use swc_ecma_parser::{lexer::Lexer, Parser};
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use swc_ecma_transforms::{
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fixer,
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hygiene::{self, hygiene_with_config},
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resolver_with_mark,
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};
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use swc_ecma_visit::FoldWith;
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fn main() {
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let file = args().nth(1).expect("should provide a path to file");
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eprintln!("File: {}", file);
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testing::run_test2(false, |cm, handler| {
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let fm = cm.load_file(Path::new(&file)).expect("failed to load file");
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let top_level_mark = Mark::fresh(Mark::root());
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let lexer = Lexer::new(
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Default::default(),
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Default::default(),
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SourceFileInput::from(&*fm),
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None,
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);
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let mut parser = Parser::new_from(lexer);
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let program = parser
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.parse_module()
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.map_err(|err| {
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err.into_diagnostic(&handler).emit();
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})
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.map(|module| module.fold_with(&mut resolver_with_mark(top_level_mark)))
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.unwrap();
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let output = optimize(
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program,
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cm.clone(),
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None,
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None,
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&MinifyOptions {
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compress: Some(Default::default()),
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mangle: Some(Default::default()),
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..Default::default()
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},
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&ExtraOptions { top_level_mark },
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);
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let output = output
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.fold_with(&mut hygiene_with_config(hygiene::Config {
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..Default::default()
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}))
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.fold_with(&mut fixer(None));
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print(cm.clone(), &[output], true);
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Ok(())
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})
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.unwrap();
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}
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fn print<N: swc_ecma_codegen::Node>(cm: Lrc<SourceMap>, nodes: &[N], minify: bool) -> String {
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let mut buf = vec![];
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{
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let mut emitter = swc_ecma_codegen::Emitter {
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cfg: swc_ecma_codegen::Config { minify },
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cm: cm.clone(),
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comments: None,
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wr: Box::new(JsWriter::new(cm.clone(), "\n", &mut buf, None)),
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};
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for n in nodes {
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n.emit_with(&mut emitter).unwrap();
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}
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}
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String::from_utf8(buf).unwrap()
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}
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