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feat: add verbatimModuleSyntax transpile option #275

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feat: add verbatimModuleSyntax transpile option #275

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39 changes: 37 additions & 2 deletions src/transpiling/mod.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -97,6 +97,9 @@ pub struct TranspileOptions {
/// When emitting a legacy decorator, also emit experimental decorator meta
/// data. Defaults to `false`.
pub emit_metadata: bool,
/// `true` changes type stripping behaviour so that _only_ `type` imports
/// are stripped.
pub verbatim_module_syntax: bool,
/// What to do with import statements that only import types i.e. whether to
/// remove them (`Remove`), keep them as side-effect imports (`Preserve`)
/// or error (`Error`). Defaults to `Remove`.
Expand Down Expand Up @@ -142,6 +145,7 @@ impl Default for TranspileOptions {
use_ts_decorators: false,
use_decorators_proposal: false,
emit_metadata: false,
verbatim_module_syntax: false,
imports_not_used_as_values: ImportsNotUsedAsValues::Remove,
jsx_automatic: false,
jsx_development: false,
Expand All @@ -167,7 +171,7 @@ impl TranspileOptions {

fn as_typescript_config(&self) -> typescript::Config {
typescript::Config {
verbatim_module_syntax: false,
verbatim_module_syntax: self.verbatim_module_syntax,
import_not_used_as_values: match self.imports_not_used_as_values {
ImportsNotUsedAsValues::Remove => {
typescript::ImportsNotUsedAsValues::Remove
Expand Down Expand Up @@ -395,7 +399,6 @@ pub fn fold_program(
proposal::decorators::decorators(proposal::decorators::Config {
legacy: true,
emit_metadata: options.emit_metadata,

use_define_for_class_fields: true,
}),
options.use_ts_decorators,
Expand Down Expand Up @@ -1559,6 +1562,38 @@ const a = _jsx(Foo, {
assert_eq!(&code[0..expected1.len()], expected1);
}

#[test]
fn test_verbatim_module_syntax() {
let specifier =
ModuleSpecifier::parse("https://deno.land/x/mod.ts").unwrap();
let source = r#"import type foo from "./foo.ts"; import bar from "./bar.ts"; import baz from "./baz.ts"; const b: baz = 1;"#;
let module = parse_module(ParseParams {
specifier,
text: source.into(),
media_type: MediaType::TypeScript,
capture_tokens: false,
maybe_syntax: None,
scope_analysis: false,
})
.unwrap();
let transpile_options = TranspileOptions {
verbatim_module_syntax: true,
..Default::default()
};
let code = module
.transpile(&transpile_options, &EmitOptions::default())
.unwrap()
.into_source()
.into_string()
.unwrap()
.text;
let expected1 = r#"import bar from "./bar.ts";
import baz from "./baz.ts";
const b = 1;
//# sourceMappingURL=data:application/json;base64,eyJ2ZXJzaW9uIjozLCJzb3VyY2VzIjpbImh0dHBzOi8vZGVuby5sYW5kL3gvbW9kLnRzIl0sInNvdXJjZXNDb250ZW50IjpbImltcG9ydCB0eXBlIGZvbyBmcm9tIFwiLi9mb28udHNcIjsgaW1wb3J0IGJhciBmcm9tIFwiLi9iYXIudHNcIjsgaW1wb3J0IGJheiBmcm9tIFwiLi9iYXoudHNcIjsgY29uc3QgYjogYmF6ID0gMTsiXSwibmFtZXMiOltdLCJtYXBwaW5ncyI6IkFBQWlDLE9BQU8sU0FBUyxXQUFXO0FBQUMsT0FBTyxTQUFTLFdBQVc7QUFB"#;
assert_eq!(&code[0..expected1.len()], expected1);
}

#[test]
fn test_inline_source_map_newline() {
let specifier =
Expand Down