refactor: extract module to build the sitemap

src/index.ts

@@ -1,8 +1,6 @@
-import {writeFileSync} from 'node:fs';
-import {join} from 'node:path';
 import type {Adapter} from '@sveltejs/kit';
 import {wrapAdapter} from './internal/wrap-adapter.js';
-import {renderSitemap} from './internal/render-sitemap.js';
+import {buildSitemap} from './internal/build-sitemap.js';
 
 /**
  * Details about a page in the sitemap.
@@ -118,24 +116,6 @@ const defaultOptions: Options = {
 
 const nameTemplate = '%s + sitemap';
 
-function buildPageEntries(
-	paths: IterableIterator<string>,
-	options: Options,
-) {
-	const pages: Record<string, Partial<PageDetails>> = {};
-	for (const path of paths) {
-		if (!(path in pages)) {
-			pages[path] = {};
-		}
-	}
-
-	return Object.entries(pages).map(([path, page]) => ({
-		loc: options.origin + path,
-		...options.defaults,
-		...page,
-	}));
-}
-
 /**
  * This function is the entry point for sveltekit-static-sitemap. It takes a
  * SvelteKit adapter and returns a wrapped version which will retrieve a
@@ -189,15 +169,9 @@ export function sitemapWrapAdapter(adapter: Adapter, options?: Partial<Options>)
 			resolvedOptions.origin = resolvedOptions.origin ?? this.config.kit.prerender.origin;
 		},
 		writePrerendered(original, dest) {
-			const pages = buildPageEntries(this.prerendered.pages.keys(), resolvedOptions);
-			const sitemap = renderSitemap(pages);
-
-			const target = join(dest, resolvedOptions.sitemapFile);
-			writeFileSync(target, sitemap);
-
-			// We call the original here in the end, in case the prerendered
+			// We call the original last, in case the prerendered
 			// bundle contains a sitemap which should take priority
-			return [...original(dest), resolvedOptions.sitemapFile];
+			return [...buildSitemap(this, resolvedOptions, dest), ...original(dest)];
 		},
 	});
 }

src/internal/build-sitemap.ts

@@ -0,0 +1,33 @@
+import {writeFileSync} from 'node:fs';
+import {join} from 'node:path';
+import type {Builder} from '@sveltejs/kit';
+import type {Options, PageDetails} from '..';
+import {renderSitemap} from './render-sitemap.js';
+
+function buildPageEntries(
+	paths: IterableIterator<string>,
+	options: Options,
+) {
+	const pages: Record<string, Partial<PageDetails>> = {};
+	for (const path of paths) {
+		if (!(path in pages)) {
+			pages[path] = {};
+		}
+	}
+
+	return Object.entries(pages).map(([path, page]) => ({
+		loc: options.origin + path,
+		...options.defaults,
+		...page,
+	}));
+}
+
+export function buildSitemap(builder: Builder, options: Options, dest: string) {
+	const pages = buildPageEntries(builder.prerendered.pages.keys(), options);
+	const sitemap = renderSitemap(pages);
+
+	const target = join(dest, options.sitemapFile);
+	writeFileSync(target, sitemap);
+
+	return [options.sitemapFile];
+}