[DependencyInjection] Negated (not:) env var processor

Author: bpolaszek

CHANGELOG.md

@@ -5,6 +5,7 @@ CHANGELOG
 ---
 
  * Add `ServicesConfigurator::remove()` in the PHP-DSL
+ * added `%env(not:...)%` processor to negate boolean values
 
 5.2.0
 -----

EnvVarProcessor.php

@@ -41,6 +41,7 @@ public static function getProvidedTypes()
         return [
             'base64' => 'string',
             'bool' => 'bool',
+            'not' => 'bool',
             'const' => 'bool|int|float|string|array',
             'csv' => 'array',
             'file' => 'string',
@@ -191,8 +192,10 @@ public function getEnv(string $prefix, string $name, \Closure $getEnv)
             return (string) $env;
         }
 
-        if ('bool' === $prefix) {
-            return (bool) (filter_var($env, \FILTER_VALIDATE_BOOLEAN) ?: filter_var($env, \FILTER_VALIDATE_INT) ?: filter_var($env, \FILTER_VALIDATE_FLOAT));
+        if (in_array($prefix, ['bool', 'not'], true)) {
+            $env = (bool) (filter_var($env, \FILTER_VALIDATE_BOOLEAN) ?: filter_var($env, \FILTER_VALIDATE_INT) ?: filter_var($env, \FILTER_VALIDATE_FLOAT));
+
+            return 'not' === $prefix ? !$env : $env;
         }
 
         if ('int' === $prefix) {

Tests/Compiler/RegisterEnvVarProcessorsPassTest.php

@@ -33,6 +33,7 @@ public function testSimpleProcessor()
             'foo' => ['string'],
             'base64' => ['string'],
             'bool' => ['bool'],
+            'not' => ['bool'],
             'const' => ['bool', 'int', 'float', 'string', 'array'],
             'csv' => ['array'],
             'file' => ['string'],

Tests/EnvVarProcessorTest.php

@@ -64,6 +64,22 @@ public function testGetEnvBool($value, $processed)
         $this->assertSame($processed, $result);
     }
 
+    /**
+     * @dataProvider validBools
+     */
+    public function testGetEnvNot($value, $processed)
+    {
+        $processor = new EnvVarProcessor(new Container());
+
+        $result = $processor->getEnv('not', 'foo', function ($name) use ($value) {
+            $this->assertSame('foo', $name);
+
+            return $value;
+        });
+
+        $this->assertSame(!$processed, $result);
+    }
+
     public function validBools()
     {
         return [