Enhance sourceMapIncludeSources option

lib/src/compiler/utils.ts

@@ -71,7 +71,9 @@ function newCompileRequest(
     importers: importers.importers,
     globalFunctions: Object.keys(options?.functions ?? {}),
     sourceMap: !!options?.sourceMap,
-    sourceMapIncludeSources: !!options?.sourceMapIncludeSources,
+    sourceMapIncludeSources: utils.protofySourceMapIncludeSources(
+      options?.sourceMapIncludeSources ?? 'auto',
+    ),
     alertColor: options?.alertColor ?? !!supportsColor.stdout,
     alertAscii: !!options?.alertAscii,
     quietDeps: !!options?.quietDeps,

lib/src/legacy/index.ts

@@ -303,7 +303,7 @@ function newLegacyResult(
           return pathToUrlString(
             p.relative(sourceMapDir, fileUrlToPathCrossPlatform(source)),
           );
-        } else if (source.startsWith('data:')) {
+        } else if (source === '') {
           return 'stdin';
         } else {
           return source;

lib/src/utils.ts

@@ -7,7 +7,7 @@ import * as p from 'path';
 import * as url from 'url';
 
 import * as proto from './vendor/embedded_sass_pb';
-import {Syntax} from './vendor/sass';
+import {SourceMapIncludeSources, Syntax} from './vendor/sass';
 
 export type PromiseOr<
   T,
@@ -147,6 +147,31 @@ export function protofySyntax(syntax: Syntax): proto.Syntax {
   }
 }
 
+/** Converts a JS sourceMapIncludeSources value into a protobuf
+ * sourceMapIncludeSources enum.
+ */
+export function protofySourceMapIncludeSources(
+  sourceMapIncludeSources: SourceMapIncludeSources | boolean,
+): proto.SourceMapIncludeSources {
+  switch (sourceMapIncludeSources) {
+    case 'auto':
+      return proto.SourceMapIncludeSources.AUTO;
+
+    case 'always':
+    case true:
+      return proto.SourceMapIncludeSources.ALWAYS;
+
+    case 'never':
+    case false:
+      return proto.SourceMapIncludeSources.NEVER;
+
+    default:
+      throw new Error(
+        `Unknown sourceMapIncludeSources: "${sourceMapIncludeSources}"`,
+      );
+  }
+}
+
 /** Returns whether `error` is a NodeJS-style exception with an error code. */
 export function isErrnoException(
   error: unknown,

package.json

@@ -1,7 +1,7 @@
 {
   "name": "sass-embedded",
   "version": "1.97.3",
-  "protocol-version": "3.2.0",
+  "protocol-version": "3.3.0",
   "compiler-version": "1.97.3",
   "description": "Node.js library that communicates with Embedded Dart Sass using the Embedded Sass protocol",
   "repository": "sass/embedded-host-node",