Tests and chores

src/compiler/preprocess/index.ts

@@ -211,8 +211,8 @@ export default async function preprocess(
 	const filename = (options && options.filename) || preprocessor.filename; // legacy
 	const dependencies = [];
 
-	// preprocess source must be relative to itself
+	// preprocess source must be relative to itself or equal null
-	const file_basename = filename && get_file_basename(filename);
+	const file_basename = filename == null ? null : get_file_basename(filename);
 
 	const preprocessors = preprocessor
 		? Array.isArray(preprocessor) ? preprocessor : [preprocessor]

src/compiler/utils/string_with_sourcemap.ts

@@ -16,17 +16,17 @@ export function sourcemap_add_offset(
 	map: DecodedSourceMap, offset: SourceLocation, source_index: number
 ) {
 	if (map.mappings.length == 0) return;
-	// shift lines
 	for (let line = 0; line < map.mappings.length; line++) {
 		const segment_list = map.mappings[line];
 		for (let segment = 0; segment < segment_list.length; segment++) {
 			const seg = segment_list[segment];
 			// shift only segments that belong to component source file
-			if (seg.length >= 4 && seg[1] === source_index) {
+			if (seg[1] === source_index) { // also ensures that seg.length >= 4
-				// shift columns pointing at the first line
+				// shift column if it points at the first line
 				if (seg[2] === 0) {
 					seg[3] += offset.column;
 				}
+				// shift line
 				seg[2] += offset.line;
 			}
 		}
@@ -121,8 +121,8 @@ export class StringWithSourcemap {
 				const segment_list = m2.mappings[line];
 				for (let segment = 0; segment < segment_list.length; segment++) {
 					const seg = segment_list[segment];
-					if (seg.length > 1) seg[1] = new_source_idx[seg[1]];
+					if (seg[1] >= 0) seg[1] = new_source_idx[seg[1]];
-					if (seg.length > 4) seg[4] = new_name_idx[seg[4]];
+					if (seg[4] >= 0) seg[4] = new_name_idx[seg[4]];
 				}
 			}
 		} else if (sources_idx_changed) {
@@ -130,7 +130,7 @@ export class StringWithSourcemap {
 				const segment_list = m2.mappings[line];
 				for (let segment = 0; segment < segment_list.length; segment++) {
 					const seg = segment_list[segment];
-					if (seg.length > 1) seg[1] = new_source_idx[seg[1]];
+					if (seg[1] >= 0) seg[1] = new_source_idx[seg[1]];
 				}
 			}
 		} else if (names_idx_changed) {
@@ -138,7 +138,7 @@ export class StringWithSourcemap {
 				const segment_list = m2.mappings[line];
 				for (let segment = 0; segment < segment_list.length; segment++) {
 					const seg = segment_list[segment];
-					if (seg.length > 4) seg[4] = new_name_idx[seg[4]];
+					if (seg[4] >= 0) seg[4] = new_name_idx[seg[4]];
 				}
 			}
 		}

test/sourcemaps/samples/script-and-style/_config.js

@@ -1,22 +0,0 @@
-import MagicString from 'magic-string';
-import { magic_string_preprocessor_result } from '../../helpers';
-
-export default {
-	js_map_sources: [
-		'input.svelte'
-	],
-	preprocess: [
-		{
-			script: ({ content, filename }) => {
-				const s = new MagicString(content);
-				s.prepend('// This script code is approved\n');
-				return magic_string_preprocessor_result(filename, s);
-			},
-			style: ({ content, filename }) => {
-				const s = new MagicString(content);
-				s.prepend('/* This style code is approved */\n');
-				return magic_string_preprocessor_result(filename, s);
-			}
-		}
-	]
-};

test/sourcemaps/samples/script-and-style/input.svelte

@@ -1,19 +0,0 @@
-<script>
-  import { onMount } from 'svelte';
-
-  let count = 0;
-
-  onMount(() => {
-    const id = setInterval(() => count++, 1000);
-    return () => clearInterval(id);
-  });
-</script>
-
-<style>
-  h1 {
-    color: orange;
-  }
-</style>
-
-<h1>Hello world!</h1>
-<div>Counter value: {count}</div>

test/sourcemaps/samples/script-and-style/test.js

@@ -1,9 +0,0 @@
-import { assert_mapped } from '../../helpers';
-
-export function test({ input, preprocessed }) {
-	assert_mapped({
-		code: '<h1>Hello world!</h1>',
-		input: input.locate,
-		preprocessed
-	});
-}

test/sourcemaps/samples/sourcemap-concat/test.js

@@ -2,7 +2,7 @@ import { assert_mapped } from '../../helpers';
 
 export function test({ input, preprocessed }) {
 	assert_mapped({
-    code: 'Target',
+		code: 'Target',
 		input: input.locate,
 		preprocessed
 	});

test/sourcemaps/samples/sourcemap-offsets/_config.js

@@ -0,0 +1,18 @@
+import { magic_string_bundle } from '../../helpers';
+
+export const EXTERNAL = 'span { --external-var: 1px; }';
+
+export default {
+	js_map_sources: [],
+	css_map_sources: ['input.svelte', 'external.css'],
+	preprocess: [
+		{
+			style: ({ content, filename }) => {
+				return magic_string_bundle([
+					{ code: EXTERNAL, filename: 'external.css' },
+					{ code: content, filename }
+				]);
+			}
+		}
+	]
+};

test/sourcemaps/samples/sourcemap-offsets/input.svelte

@@ -0,0 +1,9 @@
+<script>
+	// This block is here to offset style block
+</script>
+
+<style>
+	div { --component-var: 2px; }
+</style>
+
+<div><span>Text</span></div>

test/sourcemaps/samples/sourcemap-offsets/test.js

@@ -0,0 +1,19 @@
+import { assert_mapped } from '../../helpers';
+import { EXTERNAL } from './_config';
+
+export function test({ input, preprocessed }) {
+	// Part from component, should be with offset
+	assert_mapped({
+		code: '--component-var',
+		input: input.locate,
+		preprocessed
+	});
+	
+	// Part from external file, should be without offset
+	assert_mapped({
+		filename: 'external.css',
+		code: '--external-var',
+		input: EXTERNAL,
+		preprocessed
+	});
+}