mirror of
https://github.com/swc-project/swc.git
synced 2024-12-25 06:36:08 +03:00
1c1c9f0eae
swc_ecma_minifier: - Improve the script for extracting inputs from next.js app. - Ensure the name is removed on inlining. - Respect `inline_prevented`.
83 lines
2.3 KiB
Rust
83 lines
2.3 KiB
Rust
extern crate swc_node_base;
|
|
|
|
use std::{env::args, fs, path::Path};
|
|
use swc_common::{input::SourceFileInput, sync::Lrc, Mark, SourceMap};
|
|
use swc_ecma_codegen::text_writer::JsWriter;
|
|
use swc_ecma_minifier::{
|
|
optimize,
|
|
option::{ExtraOptions, MinifyOptions},
|
|
};
|
|
use swc_ecma_parser::{lexer::Lexer, Parser};
|
|
use swc_ecma_transforms::{fixer, hygiene, resolver_with_mark};
|
|
use swc_ecma_visit::FoldWith;
|
|
|
|
fn main() {
|
|
let file = args().nth(1).expect("should provide a path to file");
|
|
|
|
eprintln!("File: {}", file);
|
|
|
|
testing::run_test2(false, |cm, handler| {
|
|
let fm = cm.load_file(Path::new(&file)).expect("failed to load file");
|
|
|
|
let top_level_mark = Mark::fresh(Mark::root());
|
|
|
|
let lexer = Lexer::new(
|
|
Default::default(),
|
|
Default::default(),
|
|
SourceFileInput::from(&*fm),
|
|
None,
|
|
);
|
|
|
|
let mut parser = Parser::new_from(lexer);
|
|
let program = parser
|
|
.parse_module()
|
|
.map_err(|err| {
|
|
err.into_diagnostic(&handler).emit();
|
|
})
|
|
.map(|module| module.fold_with(&mut resolver_with_mark(top_level_mark)))
|
|
.unwrap();
|
|
|
|
let output = optimize(
|
|
program,
|
|
cm.clone(),
|
|
None,
|
|
None,
|
|
&MinifyOptions {
|
|
compress: Some(Default::default()),
|
|
mangle: None,
|
|
..Default::default()
|
|
},
|
|
&ExtraOptions { top_level_mark },
|
|
);
|
|
|
|
let output = output.fold_with(&mut hygiene());
|
|
let output = output.fold_with(&mut fixer(None));
|
|
|
|
let code = print(cm.clone(), &[output], true);
|
|
|
|
fs::write("output.js", code.as_bytes()).expect("failed to write output");
|
|
|
|
Ok(())
|
|
})
|
|
.unwrap();
|
|
}
|
|
|
|
fn print<N: swc_ecma_codegen::Node>(cm: Lrc<SourceMap>, nodes: &[N], minify: bool) -> String {
|
|
let mut buf = vec![];
|
|
|
|
{
|
|
let mut emitter = swc_ecma_codegen::Emitter {
|
|
cfg: swc_ecma_codegen::Config { minify },
|
|
cm: cm.clone(),
|
|
comments: None,
|
|
wr: Box::new(JsWriter::new(cm.clone(), "\n", &mut buf, None)),
|
|
};
|
|
|
|
for n in nodes {
|
|
n.emit_with(&mut emitter).unwrap();
|
|
}
|
|
}
|
|
|
|
String::from_utf8(buf).unwrap()
|
|
}
|