Changes required for a Symfony project to run on ZEIT now.

* Add a `now.json` file with the required fields. Also add the environment variables here.
* Add a `.nowignore` file to ignore the `var` and `vendor` directories among others (.env files also recommended). This will increase the upload/deployment time.
* Change the cache and log directories in the Kernel: Edit the two methods in `src/Kernel.php`.
* Add an `elseif` statement to `config/bootstrap.php` to do nothing if `NOW_REGION` exists and `NOW_REGION!=="dev1"`. This will prevent errors from the Dotenv package.

.nowignore

@@ -0,0 +1,7 @@
+vendor
+var
+.git
+tests
+appveyor.yml
+.env*
+

config/bootstrap.php

@@ -8,6 +8,9 @@
 // Run "composer dump-env prod" to create it (requires symfony/flex >=1.2)
 if (is_array($env = @include dirname(__DIR__).'/.env.local.php')) {
     $_ENV += $env;
+} elseif (isset($_ENV['NOW_REGION']) && $_ENV['NOW_REGION'] !== 'dev1') {
+    // Load env variables from the now environment, so no operation needed.
+    error_log('Symfony notice: Use environment variables from Now platform.');
 } elseif (!class_exists(Dotenv::class)) {
     throw new RuntimeException('Please run "composer require symfony/dotenv" to load the ".env" files configuring the application.');
 } else {

config/packages/prod/monolog.yaml

@@ -7,7 +7,7 @@ monolog:
             excluded_http_codes: [404]
         nested:
             type: stream
-            path: "%kernel.logs_dir%/%kernel.environment%.log"
+            path: "php://stderr"
             level: debug
         console:
             type: console

now.json

@@ -0,0 +1,25 @@
+{
+  "name": "symfony-demo",
+  "version": 2,
+  "env": {
+    "APP_ENV": "prod",
+    "APP_DEBUG": "0",
+    "APP_SECRET": "secret123",
+    "DATABASE_URL": "sqlite:///%kernel.project_dir%/data/database.sqlite",
+    "MAILER_URL": "null://localhost"
+  },
+  "builds": [
+    { "src": "public/index.php", "use": "@juicyfx/php@canary", "config": { "mode": "cgi", "composer": true } },
+    { "src": "public/!(*.php)", "use": "@now/static" },
+    { "src": "public/**/!(*.php)", "use": "@now/static" }
+  ],
+  "routes": [
+    { "src": "/apple-touch-icon.png", "dest": "public/apple-touch-icon.png"},
+    { "src": "/favicon.ico", "dest": "public/favicon.ico"},
+    { "src": "/robots.txt", "dest": "public/robots.txt"},
+    { "src": "/build/(.*)", "dest": "public/build/$1"},
+    { "src": "/(.*)", "dest": "public/index.php" } 
+  ],
+  "public": true,
+  "scope": "ties"
+}

src/Kernel.php

@@ -26,11 +26,17 @@ class Kernel extends BaseKernel
 
     public function getCacheDir()
     {
+	if (isset($_SERVER['NOW_REGION']) && $_SERVER['NOW_REGION'] !== 'dev1') {
+            return '/tmp/symfony/cache/'.$this->environment;
+        }
         return $this->getProjectDir().'/var/cache/'.$this->environment;
     }
 
     public function getLogDir()
     {
+        if (isset($_SERVER['NOW_REGION']) && $_SERVER['NOW_REGION'] !== 'dev1') {
+            return '/tmp/symfony/log';
+        }
         return $this->getProjectDir().'/var/log';
     }