Update astro-expressive-code to v0.38

.changeset/kind-ravens-cross.md

@@ -0,0 +1,7 @@
+---
+'@astrojs/starlight': minor
+---
+
+Updates the `astro-expressive-code` dependency to the latest version (0.38).
+
+The new version allows using `ec.config.mjs` to selectively override individual Expressive Code styles and settings provided by Starlight themes and plugins, speeds up Shiki language loading, and adds the config option `expressiveCode.shiki.injectLangsIntoNestedCodeBlocks`. See the [Expressive Code release notes](https://expressive-code.com/releases/#0380) for full details.

packages/starlight/integrations/expressive-code/index.ts

@@ -8,6 +8,7 @@ import type { AstroIntegration } from 'astro';
 import type { StarlightConfig } from '../../types';
 import type { createTranslationSystemFromFs } from '../../utils/translations-fs';
 import { pathToLocale } from '../shared/pathToLocale';
+import { slugToLocale } from '../shared/slugToLocale';
 import {
 	applyStarlightUiThemeColors,
 	preprocessThemes,
@@ -152,7 +153,10 @@ export function getStarlightEcConfigPreprocessor({
 				},
 				...otherStyleOverrides,
 			},
-			getBlockLocale: ({ file }) => pathToLocale(file.path, { starlightConfig, astroConfig }),
+			getBlockLocale: ({ file }) =>
+				file.url
+					? slugToLocale(file.url.pathname.slice(1), starlightConfig)
+					: pathToLocale(file.path, { starlightConfig, astroConfig }),
 			plugins,
 			...rest,
 		};

packages/starlight/package.json

@@ -181,16 +181,16 @@
     "@types/node": "^18.16.19",
     "@vitest/coverage-v8": "^1.6.0",
     "astro": "^4.15.3",
-    "vitest": "^1.6.0",
-    "linkedom": "^0.18.4"
+    "linkedom": "^0.18.4",
+    "vitest": "^1.6.0"
   },
   "dependencies": {
     "@astrojs/mdx": "^3.1.3",
     "@astrojs/sitemap": "^3.1.6",
     "@pagefind/default-ui": "^1.0.3",
     "@types/hast": "^3.0.4",
     "@types/mdast": "^4.0.4",
-    "astro-expressive-code": "^0.35.6",
+    "astro-expressive-code": "^0.38.3",
     "bcp-47": "^2.1.0",
     "hast-util-from-html": "^2.0.1",
     "hast-util-select": "^6.0.2",

packages/starlight/vitest.config.ts

@@ -20,11 +20,10 @@ export default defineConfig({
 				'index.ts',
 			],
 			thresholds: {
-				autoUpdate: true,
-				lines: 89.26,
-				functions: 92.78,
-				branches: 92.48,
-				statements: 89.26,
+				lines: 88,
+				functions: 90,
+				branches: 90,
+				statements: 88,
 			},
 		},
 	},