[Feature] SvelteKit adapter for Desktop Apps with Electron

platforms.js

@@ -0,0 +1,75 @@
+import fs from 'fs';
+
+/**
+ * @typedef {{
+ *   name: string;
+ *   test: () => boolean;
+ *   defaults: import('./index').AdapterOptions;
+ *   done: (builder: import('@sveltejs/kit').Builder) => void;
+ * }}
+ * Platform */
+
+// This function is duplicated in adapter-vercel
+/** @param {import('@sveltejs/kit').Builder} builder */
+function static_vercel_config(builder) {
+	/** @type {any[]} */
+	const prerendered_redirects = [];
+
+	/** @type {Record<string, { path: string }>} */
+	const overrides = {};
+
+	for (const [src, redirect] of builder.prerendered.redirects) {
+		prerendered_redirects.push({
+			src,
+			headers: {
+				Location: redirect.location
+			},
+			status: redirect.status
+		});
+	}
+
+	for (const [path, page] of builder.prerendered.pages) {
+		if (path.endsWith('/') && path !== '/') {
+			prerendered_redirects.push(
+				{ src: path, dest: path.slice(0, -1) },
+				{ src: path.slice(0, -1), status: 308, headers: { Location: path } }
+			);
+
+			overrides[page.file] = { path: path.slice(1, -1) };
+		} else {
+			overrides[page.file] = { path: path.slice(1) };
+		}
+	}
+
+	return {
+		version: 3,
+		routes: [
+			...prerendered_redirects,
+			{
+				src: `/${builder.getAppPath()}/immutable/.+`,
+				headers: {
+					'cache-control': 'public, immutable, max-age=31536000'
+				}
+			},
+			{
+				handle: 'filesystem'
+			}
+		],
+		overrides
+	};
+}
+
+/** @type {Platform[]} */
+export const platforms = [
+	{
+		name: 'Vercel',
+		test: () => !!process.env.VERCEL,
+		defaults: {
+			pages: '.vercel/output/static'
+		},
+		done: (builder) => {
+			const config = static_vercel_config(builder);
+			fs.writeFileSync('.vercel/output/config.json', JSON.stringify(config, null, '  '));
+		}
+	}
+];