port mintlify to fumadocs

lib/source.ts

@@ -0,0 +1,57 @@
+import { llms, loader } from 'fumadocs-core/source';
+import { docsContentRoute, docsRoute } from './shared';
+import { defineDocs } from 'fumadocs-mdx/macro';
+import { applyMdxPreset } from 'fumadocs-mdx/config';
+import { metaSchema, pageSchema } from 'fumadocs-core/source/schema';
+import { transformerMetaHighlight } from '@shikijs/transformers';
+import { rehypeCodeDefaultOptions } from 'fumadocs-core/mdx-plugins';
+
+const docs = defineDocs({
+  dir: 'content/docs',
+  docs: {
+    schema: pageSchema,
+    mdxOptions: applyMdxPreset({
+      rehypeCodeOptions: {
+        // languages used in the content that Shiki doesn't ship
+        langAlias: { env: 'dotenv', dns: 'txt', promql: 'txt' },
+        langs: ['dotenv'],
+        fallbackLanguage: 'txt',
+        themes: {
+          light: 'gruvbox-light-hard',
+          dark: 'gruvbox-dark-hard',
+        },
+        transformers: [
+          ...(rehypeCodeDefaultOptions.transformers ?? []),
+          // Mintlify-style `{1,3-5}` line highlights
+          transformerMetaHighlight(),
+        ],
+      },
+    }),
+    postprocess: {
+      includeProcessedMarkdown: true,
+    },
+  },
+  meta: {
+    schema: metaSchema,
+  },
+});
+
+// See https://fumadocs.dev/docs/headless/source-api for more info
+export const source = loader({
+  baseUrl: docsRoute,
+  source: docs.toFumadocsSource(),
+});
+
+export type Page = ReturnType<typeof source.getPages>[number];
+
+export async function getPageText(page: Page) {
+  return `# ${page.data.title} (${page.url})
+
+${page.data.description ? `> ${page.data.description}\n\n` : ''}${await page.data.getText('processed')}`;
+}
+
+export const docsLlms = llms(source, {
+  renderPage: getPageText,
+});
+
+export { docsContentRoute };