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Code Issues Packages 1 Wiki Activity

fix(npm): cjs export analysis should take into consideration exports with dashes (#15582)

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David Sherret 2022-08-24 13:37:34 -04:00 committed by GitHub
parent 33c4d45328
commit 18fcef8b29
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1 changed files with 39 additions and 15 deletions
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54
cli/node/mod.rs
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@ -484,19 +484,33 @@ fn module_resolve(
})
}
fn add_export(source: &mut Vec<String>, name: &str, initializer: &str) {
fn add_export(
source: &mut Vec<String>,
name: &str,
initializer: &str,
temp_var_count: &mut usize,
) {
fn is_valid_var_decl(name: &str) -> bool {
// it's ok to be super strict here
name
.chars()
.all(|c| c.is_ascii_alphanumeric() || c == '_' || c == '$')
}
// TODO(bartlomieju): Node actually checks if a given export exists in `exports` object,
// but it might not be necessary here since our analysis is more detailed?
if RESERVED_WORDS.contains(name) {
// we can't create an identifier with a reserved word, so assign it to a temporary
// variable that won't have a conflict, then re-export it as a string
if RESERVED_WORDS.contains(name) || !is_valid_var_decl(name) {
*temp_var_count += 1;
// we can't create an identifier with a reserved word or invalid identifier name,
// so assign it to a temporary variable that won't have a conflict, then re-export
// it as a string
source.push(format!(
"const __deno_reexport_temp__{} = {};",
name, initializer
"const __deno_export_{}__ = {};",
temp_var_count, initializer
));
source.push(format!(
"export {{ __deno_reexport_temp__{0} as \"{0}\" }};",
name
"export {{ __deno_export_{}__ as \"{}\" }};",
temp_var_count, name
));
} else {
source.push(format!("export const {} = {};", name, initializer));
@ -525,6 +539,7 @@ pub fn translate_cjs_to_esm(
maybe_syntax: None,
})?;
let analysis = parsed_source.analyze_cjs();
let mut temp_var_count = 0;
let mut source = vec![
r#"const require = Deno[Deno.internal].require.Module.createRequire(import.meta.url);"#.to_string(),
@ -565,7 +580,12 @@ pub fn translate_cjs_to_esm(
for export in analysis.exports.iter().filter(|e| e.as_str() != "default")
{
add_export(&mut source, export, &format!("Deno[Deno.internal].require.bindExport(reexport{0}.{1}, reexport{0})", idx, export));
add_export(
&mut source,
export,
&format!("Deno[Deno.internal].require.bindExport(reexport{0}[\"{1}\"], reexport{0})", idx, export),
&mut temp_var_count,
);
}
}
}
@ -587,7 +607,7 @@ pub fn translate_cjs_to_esm(
if export.as_str() == "default" {
// todo(dsherret): we should only do this if there was a `_esModule: true` instead
source.push(format!(
"export default Deno[Deno.internal].require.bindExport(mod.{}, mod);",
"export default Deno[Deno.internal].require.bindExport(mod[\"{}\"], mod);",
export,
));
had_default = true;
@ -596,9 +616,10 @@ pub fn translate_cjs_to_esm(
&mut source,
export,
&format!(
"Deno[Deno.internal].require.bindExport(mod.{}, mod)",
"Deno[Deno.internal].require.bindExport(mod[\"{}\"], mod)",
export
),
&mut temp_var_count,
);
}
}
@ -856,19 +877,22 @@ mod tests {
#[test]
fn test_add_export() {
let mut temp_var_count = 0;
let mut source = vec![];
let exports = vec!["static", "server", "app"];
let exports = vec!["static", "server", "app", "dashed-export"];
for export in exports {
add_export(&mut source, export, "init");
add_export(&mut source, export, "init", &mut temp_var_count);
}
assert_eq!(
source,
vec![
"const __deno_reexport_temp__static = init;".to_string(),
"export { __deno_reexport_temp__static as \"static\" };".to_string(),
"const __deno_export_1__ = init;".to_string(),
"export { __deno_export_1__ as \"static\" };".to_string(),
"export const server = init;".to_string(),
"export const app = init;".to_string(),
"const __deno_export_2__ = init;".to_string(),
"export { __deno_export_2__ as \"dashed-export\" };".to_string(),
]
)
}