Add filename option for transformStyleAttribute

Author: devongovett

node/index.d.ts

@@ -202,6 +202,8 @@ export interface ErrorLocation extends Location {
 export declare function transform(options: TransformOptions): TransformResult;
 
 export interface TransformAttributeOptions {
+  /** The filename in which the style attribute appeared. Used for error messages and dependencies. */
+  filename?: string,
   /** The source code to transform. */
   code: Buffer,
   /** Whether to enable minification. */

node/src/lib.rs

@@ -737,6 +737,7 @@ fn compile_bundle<'i, P: SourceProvider>(
 #[derive(Debug, Deserialize)]
 #[serde(rename_all = "camelCase")]
 struct AttrConfig {
+  pub filename: Option<String>,
   #[serde(with = "serde_bytes")]
   pub code: Vec<u8>,
   pub targets: Option<Browsers>,
@@ -780,9 +781,11 @@ fn compile_attr<'i>(
     None
   };
   let res = {
+    let filename = config.filename.clone().unwrap_or_default();
     let mut attr = StyleAttribute::parse(
       &code,
       ParserOptions {
+        filename,
         error_recovery: config.error_recovery,
         warnings: warnings.clone(),
         ..ParserOptions::default()

src/stylesheet.rs

@@ -265,6 +265,7 @@ impl<'i, 'o> StyleSheet<'i, 'o> {
 pub struct StyleAttribute<'i> {
   /// The declarations in the style attribute.
   pub declarations: DeclarationBlock<'i>,
+  sources: Vec<String>,
 }
 
 impl<'i> StyleAttribute<'i> {
@@ -277,6 +278,7 @@ impl<'i> StyleAttribute<'i> {
     let mut parser = Parser::new(&mut input);
     Ok(StyleAttribute {
       declarations: DeclarationBlock::parse(&mut parser, &options).map_err(|e| Error::from(e, "".into()))?,
+      sources: vec![options.filename],
     })
   }
 
@@ -299,6 +301,7 @@ impl<'i> StyleAttribute<'i> {
     // Make sure we always have capacity > 0: https://github.com/napi-rs/napi-rs/issues/1124.
     let mut dest = String::with_capacity(1);
     let mut printer = Printer::new(&mut dest, options);
+    printer.sources = Some(&self.sources);
 
     self.declarations.to_css(&mut printer)?;