feat: append prerendered redirects to _redirects file (#12199)

* feat: Generate static _routes in Cloudflare adapter * Update .changeset/ten-shirts-add.md * fix: add comements and newline in generated _redirects file * fix: exclude redirect paths from cloudflare * fix: check if there are redirects before writing * Fix formatting --------- Co-authored-by: Ben McCann <[email protected]>
sveltejs · Jul 23, 2024 · b2b7e34 · b2b7e34
1 parent c1249f5
commit b2b7e34
Show file tree

Hide file tree

Showing 2 changed files with 26 additions and 8 deletions.
diff --git a/.changeset/ten-shirts-add.md b/.changeset/ten-shirts-add.md
@@ -0,0 +1,5 @@
+---
+"@sveltejs/adapter-cloudflare": minor
+---
+
+feat: generate static `_redirects` for Cloudflare Pages
diff --git a/packages/adapter-cloudflare/index.js b/packages/adapter-cloudflare/index.js
@@ -68,6 +68,12 @@ export default function (options = {}) {
 
 			writeFileSync(`${dest}/_headers`, generate_headers(builder.getAppPath()), { flag: 'a' });
 
+			if (builder.prerendered.redirects.size > 0) {
+				writeFileSync(`${dest}/_redirects`, generate_redirects(builder.prerendered.redirects), {
+					flag: 'a'
+				});
+			}
+
 			builder.copy(`${files}/worker.js`, `${tmp}/_worker.js`, {
 				replace: {
 					SERVER: `${relativePath}/index.js`,
@@ -208,14 +214,7 @@ function get_routes_json(builder, assets, { include = ['/*'], exclude = ['<all>'
 			}
 
 			if (rule === '<prerendered>') {
-				const prerendered = [];
-				for (const path of builder.prerendered.paths) {
-					if (!builder.prerendered.redirects.has(path)) {
-						prerendered.push(path);
-					}
-				}
-
-				return prerendered;
+				return builder.prerendered.paths;
 			}
 
 			return rule;
@@ -250,3 +249,17 @@ function generate_headers(app_dir) {
 # === END AUTOGENERATED SVELTE IMMUTABLE HEADERS ===
 `.trimEnd();
 }
+
+/** @param {Map<string, { status: number; location: string }>} redirects */
+function generate_redirects(redirects) {
+	const rules = Array.from(
+		redirects.entries(),
+		([path, redirect]) => `${path} ${redirect.location} ${redirect.status}`
+	).join('\n');
+
+	return `
+# === START AUTOGENERATED SVELTE PRERENDERED REDIRECTS ===
+${rules}
+# === END AUTOGENERATED SVELTE PRERENDERED REDIRECTS ===
+`.trimEnd();
+}