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use std::{cell::RefCell, fs, path::PathBuf, sync::Arc};
use napi::bindgen_prelude::*;
use swc_core::{
base::{
config::{IsModule, ParseOptions},
try_with_handler,
},
common::{
FileName, FilePathMapping, GLOBALS, Mark, SourceMap, SyntaxContext, errors::ColorConfig,
},
ecma::{
ast::{Decl, EsVersion, Id},
atoms::Atom,
parser::{EsSyntax, Syntax, TsSyntax},
utils::{ExprCtx, find_pat_ids},
visit::{Visit, VisitMutWith, VisitWith},
},
node::MapErr,
};
use crate::next_api::utils::{NapiIssueSourceRange, NapiSourcePos};
struct Finder {
pub named_exports: Vec<Atom>,
}
impl Visit for Finder {
fn visit_export_decl(&mut self, node: &swc_core::ecma::ast::ExportDecl) {
match &node.decl {
Decl::Class(class_decl) => {
self.named_exports.push(class_decl.ident.sym.clone());
}
Decl::Fn(fn_decl) => {
self.named_exports.push(fn_decl.ident.sym.clone());
}
Decl::Var(var_decl) => {
let ids: Vec<Id> = find_pat_ids(&var_decl.decls);
for id in ids {
self.named_exports.push(id.0);
}
}
_ => {}
}
}
fn visit_export_named_specifier(&mut self, node: &swc_core::ecma::ast::ExportNamedSpecifier) {
let named_export = if let Some(exported) = &node.exported {
exported.atom().clone()
} else {
node.orig.atom().clone()
};
self.named_exports.push(named_export);
}
fn visit_export_namespace_specifier(
&mut self,
node: &swc_core::ecma::ast::ExportNamespaceSpecifier,
) {
self.named_exports.push(node.name.atom().clone());
}
}
pub struct FinderTask {
pub resource_path: Option<String>,
}
impl Task for FinderTask {
type Output = Vec<Atom>;
type JsValue = Array;
fn compute(&mut self) -> napi::Result<Self::Output> {
let resource_path = PathBuf::from(self.resource_path.take().unwrap());
let src = fs::read_to_string(&resource_path)
.map_err(|e| napi::Error::from_reason(e.to_string()))?;
let syntax = match resource_path
.extension()
.map(|os_str| os_str.to_string_lossy())
{
Some(ext) if matches!(ext.as_ref(), "ts" | "mts" | "cts") => {
Syntax::Typescript(TsSyntax {
tsx: false,
decorators: true,
dts: false,
no_early_errors: true,
disallow_ambiguous_jsx_like: false,
})
}
Some(ext) if matches!(ext.as_ref(), "tsx" | "mtsx" | "ctsx") => {
Syntax::Typescript(TsSyntax {
tsx: true,
decorators: true,
dts: false,
no_early_errors: true,
disallow_ambiguous_jsx_like: false,
})
}
_ => Syntax::Es(EsSyntax {
jsx: true,
fn_bind: true,
decorators: true,
decorators_before_export: true,
export_default_from: true,
import_attributes: true,
allow_super_outside_method: true,
allow_return_outside_function: true,
auto_accessors: true,
explicit_resource_management: true,
}),
};
GLOBALS.set(&Default::default(), || {
let c =
swc_core::base::Compiler::new(Arc::new(SourceMap::new(FilePathMapping::empty())));
let options = ParseOptions {
comments: false,
syntax,
is_module: IsModule::Unknown,
target: EsVersion::default(),
};
let fm =
c.cm.new_source_file(Arc::new(FileName::Real(resource_path)), src);
let program = try_with_handler(
c.cm.clone(),
swc_core::base::HandlerOpts {
color: ColorConfig::Never,
skip_filename: false,
},
|handler| {
c.parse_js(
fm,
handler,
options.target,
options.syntax,
options.is_module,
None,
)
},
)
.map_err(|e| e.to_pretty_error())
.convert_err()?;
let mut visitor = Finder {
named_exports: Vec::new(),
};
// Visit the AST to find named exports
program.visit_with(&mut visitor);
Ok(visitor.named_exports)
})
}
fn resolve(&mut self, env: Env, result: Self::Output) -> napi::Result<Self::JsValue> {
let mut array = env.create_array(result.len() as u32)?;
for (i, name) in result.iter().enumerate() {
let js_val = env.create_string(name.as_str())?;
array.set(i as u32, js_val)?;
}
Ok(array)
}
}
#[napi(ts_return_type = "Promise<string[]>")]
pub fn get_module_named_exports(resource_path: String) -> AsyncTask<FinderTask> {
AsyncTask::new(FinderTask {
resource_path: Some(resource_path),
})
}
#[napi(object)]
pub struct NapiSourceDiagnostic {
pub severity: &'static str,
pub message: String,
pub loc: NapiIssueSourceRange,
}
pub struct AnalyzeTask {
pub source: Option<String>,
pub is_production: bool,
}
impl Task for AnalyzeTask {
type Output = Vec<NapiSourceDiagnostic>;
type JsValue = Vec<NapiSourceDiagnostic>;
fn compute(&mut self) -> Result<Self::Output> {
GLOBALS.set(&Default::default(), || {
let c =
swc_core::base::Compiler::new(Arc::new(SourceMap::new(FilePathMapping::empty())));
let options = ParseOptions {
comments: false,
syntax: Syntax::Es(EsSyntax {
jsx: true,
fn_bind: true,
decorators: true,
decorators_before_export: true,
export_default_from: true,
import_attributes: true,
allow_super_outside_method: true,
allow_return_outside_function: true,
auto_accessors: true,
explicit_resource_management: true,
}),
is_module: IsModule::Unknown,
target: EsVersion::default(),
};
let source = self.source.take().unwrap();
let fm =
c.cm.new_source_file(Arc::new(FileName::Anon), source);
let mut program = try_with_handler(
c.cm.clone(),
swc_core::base::HandlerOpts {
color: ColorConfig::Never,
skip_filename: false,
},
|handler| {
c.parse_js(
fm,
handler,
options.target,
options.syntax,
options.is_module,
None,
)
},
)
.map_err(|e| e.to_pretty_error())
.convert_err()?;
let diagnostics = RefCell::new(Vec::new());
let top_level_mark = Mark::fresh(Mark::root());
let unresolved_mark = Mark::fresh(Mark::root());
let mut resolver_visitor = swc_core::ecma::transforms::base::resolver(unresolved_mark, top_level_mark, true);
let mut analyze_visitor = next_custom_transforms::transforms::warn_for_edge_runtime::warn_for_edge_runtime_with_handlers(
c.cm.clone(),
ExprCtx {
is_unresolved_ref_safe: true,
unresolved_ctxt: SyntaxContext::empty().apply_mark(unresolved_mark),
in_strict: false,
remaining_depth: 4,
},
false,
self.is_production,
|span, msg| {
let start = c.cm.lookup_char_pos(span.lo);
let end = c.cm.lookup_char_pos(span.hi);
diagnostics.borrow_mut().push(NapiSourceDiagnostic {
severity: "Warning",
message: msg,
loc: NapiIssueSourceRange {
start: NapiSourcePos {
line: start.line as u32,
column: start.col_display as u32,
},
end: NapiSourcePos {
line: end.line as u32,
column: end.col_display as u32,
}
}
});
},
|span, msg| {
let start = c.cm.lookup_char_pos(span.lo);
let end = c.cm.lookup_char_pos(span.hi);
diagnostics.borrow_mut().push(NapiSourceDiagnostic {
severity: "Error",
message: msg,
loc: NapiIssueSourceRange {
start: NapiSourcePos {
line: start.line as u32,
column: start.col_display as u32,
},
end: NapiSourcePos {
line: end.line as u32,
column: end.col_display as u32,
}
}
});
});
program.visit_mut_with(&mut resolver_visitor);
program.visit_with(&mut analyze_visitor);
Ok(diagnostics.take())
})
}
fn resolve(&mut self, _env: Env, output: Self::Output) -> Result<Self::JsValue> {
Ok(output)
}
}
#[napi(ts_return_type = "Promise<NapiSourceDiagnostic[]>")]
pub fn warn_for_edge_runtime(source: String, is_production: bool) -> AsyncTask<AnalyzeTask> {
AsyncTask::new(AnalyzeTask {
source: Some(source),
is_production,
})
}
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