move fn get_replacement

src/compiler/preprocess/index.ts

@@ -86,28 +86,6 @@ async function replace_async(
 	return out;
 }
 
-export default async function preprocess(
-	source: string,
-	preprocessor: PreprocessorGroup | PreprocessorGroup[],
-	options?: { filename?: string }
-) {
-	// @ts-ignore todo: doublecheck
-	const filename = (options && options.filename) || preprocessor.filename; // legacy
-	const dependencies = [];
-
-	const preprocessors = preprocessor
-		? Array.isArray(preprocessor) ? preprocessor : [preprocessor]
-		: []; // noop
-
-	const markup = preprocessors.map(p => p.markup).filter(Boolean);
-	const script = preprocessors.map(p => p.script).filter(Boolean);
-	const style = preprocessors.map(p => p.style).filter(Boolean);
-
-	// sourcemap_list is sorted in reverse order from last map (index 0) to first map (index -1)
-	// so we use sourcemap_list.unshift() to add new maps
-	// https://github.com/ampproject/remapping#multiple-transformations-of-a-file
-	const sourcemap_list: Array<Processed['map']> = [];
-
 function get_replacement(
 	filename: string,
 	offset: number,
@@ -117,7 +95,6 @@ export default async function preprocess(
 	prefix: string,
 	suffix: string
 ): StringWithSourcemap {
-
 	const generated_prefix = StringWithSourcemap.from_source(
 		filename, prefix, get_location(offset));
 	const generated_suffix = StringWithSourcemap.from_source(
@@ -136,6 +113,28 @@ export default async function preprocess(
 	return map;
 }
 
+export default async function preprocess(
+	source: string,
+	preprocessor: PreprocessorGroup | PreprocessorGroup[],
+	options?: { filename?: string }
+) {
+	// @ts-ignore todo: doublecheck
+	const filename = (options && options.filename) || preprocessor.filename; // legacy
+	const dependencies = [];
+
+	const preprocessors = preprocessor
+		? Array.isArray(preprocessor) ? preprocessor : [preprocessor]
+		: []; // noop
+
+	const markup = preprocessors.map(p => p.markup).filter(Boolean);
+	const script = preprocessors.map(p => p.script).filter(Boolean);
+	const style = preprocessors.map(p => p.style).filter(Boolean);
+
+	// sourcemap_list is sorted in reverse order from last map (index 0) to first map (index -1)
+	// so we use sourcemap_list.unshift() to add new maps
+	// https://github.com/ampproject/remapping#multiple-transformations-of-a-file
+	const sourcemap_list: Array<Processed['map']> = [];
+
 	for (const fn of markup) {
 
 		// run markup preprocessor