EnvConfig: use TExternalFile instead of a constant for config file path

README.md

@@ -10,19 +10,4 @@ composer require jrosset/envreader
 
 ## Usage
 
-```php
-<?php
-
-use jrosset\EnvReader\EnvConfig;
-
-class Env extends EnvConfig {
-    protected const PATH_ENV = __DIR__ . '/.env';
-
-    protected function initProperties (): array {
-        return [
-            'WEBSITE_MODE' => 'DEV',
-            'WEBSITE_NAME' => 'Generic site'
-        ];
-    }
-}
-```
+Check "tests"  directory for various examples

src/EnvReader/EnvConfig.php

@@ -4,23 +4,21 @@ namespace jrosset\EnvReader;
 
 use Exception;
 
-class EnvConfig extends GenericConfig {
-    /**
-     * ENV file path
-     */
-    protected const PATH_ENV = '.env';
+abstract class EnvConfig extends GenericConfig {
+    use TExternalFile;
 
     /**
      * @inheritDoc
      */
     protected function readConfig (): void {
-        if (!file_exists(static::PATH_ENV)) {
+        $configFile = $this->getConfigFilePath();
+        if (!file_exists($configFile)) {
             return;
         }
 
-        $lines = file(static::PATH_ENV, FILE_IGNORE_NEW_LINES | FILE_SKIP_EMPTY_LINES);
+        $lines = file($configFile, FILE_IGNORE_NEW_LINES | FILE_SKIP_EMPTY_LINES);
         if ($lines === false) {
-            throw new Exception('Unable to read environment file "' . static::PATH_ENV . '"');
+            throw new Exception('Unable to read environment file "' . $configFile . '"');
         }
 
         foreach ($lines as $line) {

tests/test_env.php

@@ -6,17 +6,15 @@ require_once __DIR__ . '/../vendor/autoload.php';
 use jrosset\EnvReader\EnvConfig;
 
 class Env extends EnvConfig {
-    /**
-     * @inheritdoc
-     */
-    protected const PATH_ENV = __DIR__ . '/.env';
-
     protected function initialProperties (): array {
         return [
             'WEBSITE_MODE' => 'DEV',
             'WEBSITE_NAME' => 'Generic site',
         ];
     }
+    protected function getConfigFilePath (): string {
+        return __DIR__ . '/.env';
+    }
 }
 
 var_dump(Env::getInstance()->getProperties());