cloudflareのプレビューを修正

app/lib/docs.ts

@@ -112,18 +112,26 @@ export interface SectionRevision {
   path: string;
 }
 
+const publicFileCache = new Map<string, Promise<string>>();
 async function readPublicFile(path: string): Promise<string> {
   try {
     if (isCloudflare()) {
-      const cfAssets = getCloudflareContext().env.ASSETS;
-      const res = await cfAssets!.fetch(`https://assets.local/${path}`);
-      if (!res.ok) {
-        console.error(
-          `Failed to fetch ${path}: ${res.status} ${await res.text()}`
-        );
-        notFound();
+      if (publicFileCache.has(path)) {
+        return publicFileCache.get(path)!;
       }
-      return await res.text();
+      const p = (async () => {
+        const cfAssets = getCloudflareContext().env.ASSETS;
+        const res = await cfAssets!.fetch(`https://assets.local/${path}`);
+        if (!res.ok) {
+          console.error(
+            `Failed to fetch ${path}: ${res.status} ${await res.text()}`
+          );
+          notFound();
+        }
+        return await res.text();
+      })();
+      publicFileCache.set(path, p);
+      return p;
     } else {
       return await readFile(join(process.cwd(), "public", path), "utf-8");
     }
@@ -167,15 +175,27 @@ export async function getPagesList(): Promise<LanguageEntry[]> {
   );
 }
 
-export async function getSectionsList(
+export async function getRevisions(
+  sectionId: SectionId
+): Promise<RevisionYmlEntry | undefined> {
+  const revisionsYml = await readPublicFile(`docs/revisions.yml`);
+  return (yaml.load(revisionsYml) as Record<string, RevisionYmlEntry>)[
+    sectionId
+  ];
+}
+
+/**
+ * public/docs/{lang}/{pageId}/ 以下のmdファイルを結合して MarkdownSection[] を返す。
+ */
+export async function getMarkdownSections(
   lang: LangId,
   page: PageSlug
-): Promise<string[]> {
+): Promise<MarkdownSection[]> {
   if (isCloudflare()) {
     const sectionsJson = await readPublicFile(
       `docs/${lang}/${page}/sections.json`
     );
-    return JSON.parse(sectionsJson) as string[];
+    return JSON.parse(sectionsJson) as MarkdownSection[];
   } else {
     function naturalSortMdFiles(a: string, b: string): number {
       // -intro.md always comes first
@@ -191,48 +211,31 @@ export async function getSectionsList(
       }
       return a.localeCompare(b);
     }
-    return (await readdir(join(process.cwd(), "public", "docs", lang, page)))
+    const files = (
+      await readdir(join(process.cwd(), "public", "docs", lang, page))
+    )
       .filter((f) => f.endsWith(".md"))
       .sort(naturalSortMdFiles);
-  }
-}
 
-export async function getRevisions(
-  sectionId: SectionId
-): Promise<RevisionYmlEntry | undefined> {
-  const revisionsYml = await readPublicFile(`docs/revisions.yml`);
-  return (yaml.load(revisionsYml) as Record<string, RevisionYmlEntry>)[
-    sectionId
-  ];
-}
-
-/**
- * public/docs/{lang}/{pageId}/ 以下のmdファイルを結合して MarkdownSection[] を返す。
- */
-export async function getMarkdownSections(
-  lang: LangId,
-  page: PageSlug
-): Promise<MarkdownSection[]> {
-  const files = await getSectionsList(lang, page);
-
-  const sections: MarkdownSection[] = [];
-  for (const file of files) {
-    const raw = await readPublicFile(`docs/${lang}/${page}/${file}`);
-    if (file === "-intro.md") {
-      // イントロセクションはフロントマターなし・見出しなし
-      sections.push({
-        file,
-        id: introSectionId({ lang, page }),
-        level: 1,
-        title: "",
-        rawContent: raw,
-        md5: crypto.createHash("md5").update(raw).digest("base64"),
-      });
-    } else {
-      sections.push(parseFrontmatter(raw, file));
+    const sections: MarkdownSection[] = [];
+    for (const file of files) {
+      const raw = await readPublicFile(`docs/${lang}/${page}/${file}`);
+      if (file === "-intro.md") {
+        // イントロセクションはフロントマターなし・見出しなし
+        sections.push({
+          file,
+          id: introSectionId({ lang, page }),
+          level: 1,
+          title: "",
+          rawContent: raw,
+          md5: crypto.createHash("md5").update(raw).digest("base64"),
+        });
+      } else {
+        sections.push(parseFrontmatter(raw, file));
+      }
     }
+    return sections;
   }
-  return sections;
 }
 export function introSectionId(path: PagePath) {
   return `${path.lang}-${path.page}-intro` as SectionId;

scripts/generateDocsMeta.ts

@@ -3,7 +3,7 @@
 
 import { writeFile } from "node:fs/promises";
 import { join } from "node:path";
-import { getPagesList, getSectionsList } from "@/lib/docs";
+import { getMarkdownSections, getPagesList } from "@/lib/docs";
 
 const docsDir = join(process.cwd(), "public", "docs");
 
@@ -17,15 +17,14 @@ console.log(
 
 for (const lang of langEntries) {
   for (const page of lang.pages) {
-    const files = await getSectionsList(lang.id, page.slug);
-    const filesJson = JSON.stringify(files);
+    const sections = await getMarkdownSections(lang.id, page.slug);
     await writeFile(
       join(docsDir, lang.id, page.slug, "sections.json"),
-      filesJson,
+      JSON.stringify(sections),
       "utf-8"
     );
     console.log(
-      `Generated ${lang.id}/${page.slug}/sections.json (${files.length} files)`
+      `Generated ${lang.id}/${page.slug}/sections.json (${sections.length} files)`
     );
   }
 }