add more ways to get environement variables to figure out configuration file to use

src/Utils/Configuration/Configuration.php

@@ -1,6 +1,8 @@
 <?php
 namespace Bsr\Utils\Configuration;
 
+use Bsr\Utils\WhichEnv\WhichEnv;
+
 class Configuration {
 
     /**
@@ -71,8 +73,17 @@ class Configuration {
     public static function getConfigFilePath()
     {
         if (null === self::$customConfigFilePath) {
-            $envfile = getenv('APPLICATION_ENV') === 'development' ? 'local' : 'global';
-            self::$customConfigFilePath = realpath(dirname(__FILE__) . "/../../../../../../config/configuration.$envfile.php");
+            $envSpecificConfig = 'local';
+            if ($env = getenv('APPLICATION_ENV')) {
+            } else if (isset($_SERVER['APPLICATION_ENV'])) {
+                $env = $_SERVER['APPLICATION_ENV'];
+            } else if (WhichEnv::has('APPLICATION_ENV')) {
+                $env = WhichEnv::get('APPLICATION_ENV');
+            } else {
+                throw new \RuntimeException('Could not reliably figure out the APPLICATION_ENV, getenv and $_SERVER do not have any APPLICATION_ENV');
+            }
+            $envSpecificConfig = $env === 'development' ? 'local' : 'global';
+            self::$customConfigFilePath = realpath(dirname(__FILE__) . "/../../../../../../config/configuration.$envSpecificConfig.php");
         }
         return self::$customConfigFilePath;
     }

src/Utils/WhichEnv/WhichEnv.php

@@ -0,0 +1,25 @@
+<?php
+namespace Bsr\Utils\WhichEnv;
+
+/**
+ * Allows scripts to pass a custom Environment name
+ * based on a cutom rule
+ */
+class WhichEnv {
+    private $rule;
+
+    static public function registerRule(WhichEnvRuleInterface $rule)
+    {
+        self::$rule = $rule;
+    }
+
+    static public function has(string $varName)
+    {
+        return self::$rule instanceof WhichEnvRuleInterface && self::$rule->hasEnv($varName);
+    }
+
+    static public function get(string $varName)
+    {
+        return self::$rule->getEnv($varName);
+    }
+}

src/Utils/WhichEnv/WhichEnvRuleInterface.php

@@ -0,0 +1,19 @@
+<?php
+namespace Bsr\Utils\WhichEnv;
+
+/**
+ * 
+ */
+interface WhichEnvRuleInterface {
+    /**
+     * Must return a cutom rule
+     * @return string
+     */
+    public function getEnv(string $varName);
+
+    /**
+     * Must return a cutom rule
+     * @return string
+     */
+    public function hasEnv(string $varName);
+}