treat foo.html and foo/index.html the same when generating manifest

src/core/create_manifest_data.ts

@@ -142,29 +142,26 @@ export default function create_manifest_data(cwd: string): ManifestData {
 			}
 
 			else if (item.is_page) {
+				const is_index = item.basename === 'index.html';
+
 				const component = {
 					name: get_slug(item.file),
 					file: item.file,
 					has_preload: has_preload(item.file)
 				};
 
-				const parts = stack.concat({
-					component,
-					params
-				});
-
 				components.push(component);
-				if (item.basename === 'index.html') {
-					pages.push({
-						pattern: get_pattern(parent_segments, true),
-						parts
-					});
-				} else {
-					pages.push({
-						pattern: get_pattern(segments, true),
-						parts
-					});
-				}
+
+				const parts = (is_index && stack[stack.length - 1] === null)
+					? stack.slice(0, -1).concat({ component, params })
+					: stack.concat({ component, params })
+
+				const page = {
+					pattern: get_pattern(is_index ? parent_segments : segments, true),
+					parts
+				};
+
+				pages.push(page);
 			}
 
 			else {

test/apps/basics/src/routes/dirs/bar/index.html

@@ -0,0 +1 @@
+<h1>bar</h1>

test/apps/basics/src/routes/dirs/foo/index.html

@@ -0,0 +1,2 @@
+<h1>foo</h1>
+<a href="dirs/bar">bar</a>

test/apps/basics/test.ts

@@ -264,4 +264,15 @@ describe('basics', function() {
 		const html = String(await page.evaluate(() => document.body.innerHTML));
 		assert.equal(html.indexOf('%sapper'), -1);
 	});
+
+	it('navigates between routes with empty parts', async () => {
+		await page.goto(`${base}/dirs/foo`);
+		await start();
+
+		assert.equal(await title(), 'foo');
+
+		await page.click('[href="dirs/bar"]');
+		await wait(50);
+		assert.equal(await title(), 'bar');
+	});
 });