From 9750009cc551bf50ee67007923bf798c95426108 Mon Sep 17 00:00:00 2001
From: Daniel Roe <daniel@roe.dev>
Date: Mon, 14 Jun 2021 23:10:17 +0100
Subject: [PATCH] feat(nitro): support netlify zero-config deployments (#175)

---
 packages/nitro/src/presets/netlify.ts | 22 +++++++++++++++++++++-
 1 file changed, 21 insertions(+), 1 deletion(-)

diff --git a/packages/nitro/src/presets/netlify.ts b/packages/nitro/src/presets/netlify.ts
index 03586b2ac0..21f55b8b37 100644
--- a/packages/nitro/src/presets/netlify.ts
+++ b/packages/nitro/src/presets/netlify.ts
@@ -1,11 +1,31 @@
+import { join } from 'upath'
+import { existsSync, readFile, writeFile } from 'fs-extra'
+import consola from 'consola'
 import { extendPreset } from '../utils'
-import { NitroPreset } from '../context'
+import { NitroContext, NitroPreset } from '../context'
 import { lambda } from './lambda'
 
 export const netlify: NitroPreset = extendPreset(lambda, {
   output: {
+    dir: '{{ _nuxt.rootDir }}/netlify/functions',
     publicDir: '{{ _nuxt.rootDir }}/dist'
   },
+  hooks: {
+    async 'nitro:compiled' (ctx: NitroContext) {
+      const redirectsPath = join(ctx._nuxt.rootDir, '_redirects')
+      let contents = '/* /.netlify/functions/server 200'
+      if (existsSync(redirectsPath)) {
+        const currentRedirects = await readFile(redirectsPath, 'utf-8')
+        if (currentRedirects.match(/^\/\* /m)) {
+          consola.info('Not adding Nitro fallback to `_redirects` (as an existing fallback was found).')
+          return
+        }
+        consola.info('Adding Nitro fallback to `_redirects` to handle all unmatched routes.')
+        contents = currentRedirects + '\n' + contents
+      }
+      await writeFile(redirectsPath, contents)
+    }
+  },
   ignore: [
     'netlify.toml',
     '_redirects'