Use dynamic env params for critical settings and restore Heroku deploys

Author: dzuelke

app.json

@@ -9,12 +9,19 @@
     "repository": "https://github.com/symfony/symfony-demo",
     "logo": "https://symfony.com/images/v5/pictos/demoapp.svg?v=4",
     "success_url": "/",
+    "scripts": {
+        "postdeploy": "php bin/console doctrine:schema:create && php bin/console doctrine:fixtures:load -n"
+    },
     "env": {
         "SYMFONY_ENV": "prod",
+        "SYMFONY_LOG": "php://stderr",
         "SYMFONY_SECRET": {
             "description": "Extra entropy for %kernel.secret%; used for CSRF tokens, cookies and signed URLs.",
             "generator": "secret"
         }
     },
+    "addons": [
+        "heroku-postgresql"
+    ],
     "image": "heroku/php"
 }

app/AppKernel.php

@@ -21,6 +21,7 @@ public function registerBundles()
             new WhiteOctober\PagerfantaBundle\WhiteOctoberPagerfantaBundle(),
             new CodeExplorerBundle\CodeExplorerBundle(),
             new AppBundle\AppBundle(),
+            new Doctrine\Bundle\FixturesBundle\DoctrineFixturesBundle(), // used for initial population of non-SQLite databases in production envs
             // uncomment the following line if your application sends emails
             // new Symfony\Bundle\SwiftmailerBundle\SwiftmailerBundle(),
         ];
@@ -34,7 +35,6 @@ public function registerBundles()
             $bundles[] = new Symfony\Bundle\WebProfilerBundle\WebProfilerBundle();
             $bundles[] = new Sensio\Bundle\DistributionBundle\SensioDistributionBundle();
             $bundles[] = new Sensio\Bundle\GeneratorBundle\SensioGeneratorBundle();
-            $bundles[] = new Doctrine\Bundle\FixturesBundle\DoctrineFixturesBundle();
         }
 
         return $bundles;

app/config/config.yml

@@ -31,7 +31,7 @@ framework:
     # http://symfony.com/doc/current/book/http_cache.html#edge-side-includes
     esi:             { enabled: true }
     translator:      { fallback: "%locale%" }
-    secret:          "%secret%"
+    secret:          "%env(SYMFONY_SECRET)%"
     router:
         resource: "%kernel.root_dir%/config/routing.yml"
         strict_requirements: ~
@@ -61,10 +61,10 @@ twig:
 # Doctrine Configuration (used to access databases and manipulate their information)
 doctrine:
     dbal:
-        # if you don't want to use SQLite, comment the two following lines
-        driver: "pdo_sqlite"
-        path: "%kernel.root_dir%/data/blog.sqlite"
-        # uncomment the following lines to use a database different than SQLite
+        # if you don't want to use SQLite, change the URL in parameters.yml or set the DATABASE_URL environment variable
+        url: "%env(DATABASE_URL)%"
+        
+        # instead of using a URL, you may also uncomment the following lines to configure your database
         # driver:   pdo_mysql
         # host:     "%database_host%"
         # port:     "%database_port%"

app/config/config_dev.yml

@@ -15,7 +15,7 @@ monolog:
     handlers:
         main:
             type:   stream
-            path:   "%kernel.logs_dir%/%kernel.environment%.log"
+            path:   "%env(SYMFONY_LOG)%"
             level:  info
         console:
             type:   console

app/config/config_prod.yml

@@ -19,7 +19,7 @@ monolog:
             handler:      nested
         nested:
             type:  stream
-            path:  "%kernel.logs_dir%/%kernel.environment%.log"
+            path:  "%env(SYMFONY_LOG)%"
             level: debug
         console:
             type:  console

app/config/parameters.yml.dist

@@ -6,11 +6,11 @@ parameters:
     # this demo application uses an embedded SQLite database to simplify setup.
     # in a real Symfony application you probably will use a MySQL or PostgreSQL database
     # the path must be relative or else it will not work on Windows
-    database_url:      'sqlite:///%kernel.root_dir%/data/blog.sqlite'
+    env(DATABASE_URL): 'sqlite:///%kernel.root_dir%/data/blog.sqlite'
 
     # Uncomment this line to use a MySQL database instead of SQLite:
     #
-    # database_url:      'mysql://root:[email protected]:3306/symfony_demo'
+    # env(DATABASE_URL): 'mysql://root:[email protected]:3306/symfony_demo'
     #
     # Furthermore, you must remove or comment out the "doctrine" section from config_dev.yml regarding SQLite!
     #
@@ -35,4 +35,7 @@ parameters:
     # used internally by Symfony in several places (CSRF tokens, URI signing,
     # 'Remember Me' functionality, etc.)
     # see: http://symfony.com/doc/current/reference/configuration/framework.html#secret
-    secret: 'secret_value_for_symfony_demo_application'
+    env(SYMFONY_SECRET): 'secret_value_for_symfony_demo_application'
+
+    # Destination for log files; can also be "php://stderr" etc
+    env(SYMFONY_LOG):    %kernel.logs_dir%/%kernel.environment%.log

composer.json

@@ -64,11 +64,7 @@
         "symfony-tests-dir": "tests",
         "symfony-assets-install": "relative",
         "incenteev-parameters": {
-            "file": "app/config/parameters.yml",
-            "env-map": {
-                "database_url": "DATABASE_URL",
-                "secret": "SYMFONY_SECRET"
-            }
+            "file": "app/config/parameters.yml"
         }
     }
 }