Redirects (#7067)

* Redirects spike

* Allow redirects in static mode

* Support in Netlify as well

* Adding a changeset

* Rename file

* Fix build problem

* Refactor to be more modular

* Fix location ref

* Late test should only run in SSR

* Support redirects in Netlify SSR configuration (#7167)

* Implement support for dynamic routes in redirects (#7173)

* Implement support for dynamic routes in redirects

* Remove the .only

* No need to special-case redirects in static build

* Implement support for redirects config in the Vercel adapter (#7182)

* Implement support for redirects config in the Vercel adapter

* Remove unused condition

* Move to a internal helper package

* Add support for the object notation in redirects

* Use status 308 for non-GET redirects (#7186)

* Implement redirects in Cloudflare (#7198)

* Implement redirects in Cloudflare

* Fix build

* Update tests b/c of new ordering

* Debug issue

* Use posix.join

* Update packages/underscore-redirects/package.json

Co-authored-by: Emanuele Stoppa <my.burning@gmail.com>

* Update based on review comments

* Update broken test

---------

Co-authored-by: Emanuele Stoppa <my.burning@gmail.com>

* Test that redirects can come from middleware (#7213)

* Test that redirects can come from middleware

* Allow non-promise returns for middleware

* Implement priority (#7210)

* Refactor

* Fix netlify test ordering

* Fix ordering again

* Redirects: Allow preventing the output of the static HTML file (#7245)

* Do a simple push for priority

* Adding changesets

* Put the implementation behind a flag.

* Self review

* Update .changeset/chatty-actors-stare.md

Co-authored-by: Chris Swithinbank <swithinbank@gmail.com>

* Update packages/astro/src/@types/astro.ts

Co-authored-by: Chris Swithinbank <swithinbank@gmail.com>

* Update packages/astro/src/@types/astro.ts

Co-authored-by: Chris Swithinbank <swithinbank@gmail.com>

* Update packages/astro/src/@types/astro.ts

Co-authored-by: Chris Swithinbank <swithinbank@gmail.com>

* Update packages/astro/src/@types/astro.ts

Co-authored-by: Chris Swithinbank <swithinbank@gmail.com>

* Update docs on dynamic restrictions.

* Update packages/astro/src/@types/astro.ts

Co-authored-by: Sarah Rainsberger <sarah@rainsberger.ca>

* Update packages/astro/src/@types/astro.ts

Co-authored-by: Sarah Rainsberger <sarah@rainsberger.ca>

* Code review changes

* Document netlify static adapter

* Update packages/astro/src/@types/astro.ts

Co-authored-by: Sarah Rainsberger <sarah@rainsberger.ca>

* Slight reword

* Update .changeset/twenty-suns-vanish.md

Co-authored-by: Sarah Rainsberger <sarah@rainsberger.ca>

* Add a note about public/_redirects file

* Update packages/astro/src/@types/astro.ts

Co-authored-by: Sarah Rainsberger <sarah@rainsberger.ca>

---------

Co-authored-by: Emanuele Stoppa <my.burning@gmail.com>
Co-authored-by: Chris Swithinbank <swithinbank@gmail.com>
Co-authored-by: Sarah Rainsberger <sarah@rainsberger.ca>
Co-authored-by: Nate Moore <natemoo-re@users.noreply.github.com>

2 files changed, 44 insertions, 15 deletions

diff --git a/packages/integrations/vercel/src/lib/redirects.ts b/packages/integrations/vercel/src/lib/redirects.ts
index c11d74802..1ec19bfac 100644
--- a/packages/integrations/vercel/src/lib/redirects.ts
+++ b/packages/integrations/vercel/src/lib/redirects.ts
@@ -1,4 +1,9 @@
 import type { AstroConfig, RouteData, RoutePart } from 'astro';
+import { appendForwardSlash } from '@astrojs/internal-helpers/path';
+import nodePath from 'node:path';
+
+const pathJoin = nodePath.posix.join;
+
 
 // https://vercel.com/docs/project-configuration#legacy/routes
 interface VercelRoute {
@@ -54,28 +59,51 @@ function getReplacePattern(segments: RoutePart[][]) {
 	return result;
 }
 
+function getRedirectLocation(route: RouteData, config: AstroConfig): string {
+	if(route.redirectRoute) {
+		const pattern = getReplacePattern(route.redirectRoute.segments);
+		const path = (config.trailingSlash === 'always' ? appendForwardSlash(pattern) : pattern);
+		return pathJoin(config.base, path);
+	} else if(typeof route.redirect === 'object') {
+		return pathJoin(config.base, route.redirect.destination);
+	} else {
+		return pathJoin(config.base, route.redirect || '');
+	}	
+}
+
+function getRedirectStatus(route: RouteData): number {
+	if(typeof route.redirect === 'object') {
+		return route.redirect.status;
+	}
+	return 301;
+}
+
 export function getRedirects(routes: RouteData[], config: AstroConfig): VercelRoute[] {
 	let redirects: VercelRoute[] = [];
 
-	if (config.trailingSlash === 'always') {
-		for (const route of routes) {
-			if (route.type !== 'page' || route.segments.length === 0) continue;
 
-			redirects.push({
-				src: config.base + getMatchPattern(route.segments),
-				headers: { Location: config.base + getReplacePattern(route.segments) + '/' },
-				status: 308,
-			});
-		}
-	} else if (config.trailingSlash === 'never') {
-		for (const route of routes) {
-			if (route.type !== 'page' || route.segments.length === 0) continue;
 
+	for(const route of routes) {
+		if(route.type === 'redirect') {
 			redirects.push({
-				src: config.base + getMatchPattern(route.segments) + '/',
-				headers: { Location: config.base + getReplacePattern(route.segments) },
-				status: 308,
+				src: config.base + getMatchPattern(route.segments),
+				headers: { Location: getRedirectLocation(route, config) },
+				status: getRedirectStatus(route)
 			});
+		} else if (route.type === 'page') {
+			if (config.trailingSlash === 'always') {
+				redirects.push({
+					src: config.base + getMatchPattern(route.segments),
+					headers: { Location: config.base + getReplacePattern(route.segments) + '/' },
+					status: 308,
+				});
+			} else if (config.trailingSlash === 'never') {
+				redirects.push({
+					src: config.base + getMatchPattern(route.segments) + '/',
+					headers: { Location: config.base + getReplacePattern(route.segments) },
+					status: 308,
+				});
+			}
 		}
 	}
 
diff --git a/packages/integrations/vercel/src/static/adapter.ts b/packages/integrations/vercel/src/static/adapter.ts
index 0b3579cdd..e0cc14322 100644
--- a/packages/integrations/vercel/src/static/adapter.ts
+++ b/packages/integrations/vercel/src/static/adapter.ts
@@ -43,6 +43,7 @@ export default function vercelStatic({
 					outDir,
 					build: {
 						format: 'directory',
+						redirects: false,
 					},
 					vite: {
 						define: viteDefine,