/
sourcemap.rs
50 lines (42 loc) · 1.61 KB
/
sourcemap.rs
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use std::{env, path::Path};
use base64::{prelude::BASE64_STANDARD, Engine};
use oxc_allocator::Allocator;
use oxc_codegen::{Codegen, CodegenOptions, CodegenReturn};
use oxc_parser::Parser;
use oxc_span::SourceType;
// Instruction:
// 1. create a `test.js`
// 2. run `cargo run -p oxc_codegen --example sourcemap`
fn main() -> std::io::Result<()> {
let name = env::args().nth(1).unwrap_or_else(|| "test.js".to_string());
let path = Path::new(&name);
let source_text = std::fs::read_to_string(path)?;
let source_type = SourceType::from_path(path).unwrap();
let allocator = Allocator::default();
let ret = Parser::new(&allocator, &source_text, source_type).parse();
if !ret.errors.is_empty() {
for error in ret.errors {
let error = error.with_source_code(source_text.clone());
println!("{error:?}");
}
return Ok(());
}
let codegen_options = CodegenOptions { enable_source_map: true, enable_typescript: true };
let CodegenReturn { source_text, source_map } =
Codegen::<false>::new(path.to_string_lossy().as_ref(), &source_text, codegen_options)
.build(&ret.program);
if let Some(source_map) = source_map {
let mut buff = vec![];
source_map.to_writer(&mut buff).unwrap();
let result = String::from_utf8(buff).unwrap();
let hash = BASE64_STANDARD.encode(format!(
"{}\0{}{}\0{}",
source_text.len(),
source_text,
result.len(),
result
));
println!("https://evanw.github.io/source-map-visualization/#{hash}");
}
Ok(())
}