bug #27267 [DependencyInjection] resolve array env vars (jamesthomaso…

…njr)

This PR was squashed before being merged into the 3.4 branch (closes #27267).

Discussion
----------

[DependencyInjection] resolve array env vars

| Q             | A
| ------------- | ---
| Branch?       | 3.4
| Bug fix?      | yes
| New feature?  | no
| BC breaks?    | no
| Deprecations? | no
| Tests pass?   | yes
| Fixed tickets | #27239
| License       | MIT
| Doc PR        | n/a

## Why
This bugfix solves a problem where environment variables resolved as an array would cause an error while compiling the container if they aren't the last parameter in the ParameterBag: the next parameter to be resolved would fail at the `stripos()` check. More information about the bug is available at #27239

## Tests
- This PR modifies existing ContainerBuilder tests to make use of the EnvVarProcessor to resolve json strings into arrays, instead of relying upon a TestingEnvPlaceholderParameterBag class.
  - I would liked to have kept EnvVarProcessor logic out of the ContainerBuilder tests, but it was the interaction between the ContainerBuilder and EnvVarProcessor that caused the bug
- This PR adds a new ContainerBuilder test to verify that an environment variable resolved into an array doesn't cause an error when the next variable attempts to be resolved

## Code
- ~This PR adds an `\is_string()` sanity check before the `stripos()` method call so that only a string are passed into `stripos()`~
- This PR also adds a `$completed` flag so that completely resolved environment variables (currently only determined by `$placeholder === $value`) can break out of the loop early (handled via `break 2;`

Commits
-------

4c3b950 [DependencyInjection] resolve array env vars

src/Symfony/Component/DependencyInjection/ContainerBuilder.php

@@ -1408,6 +1408,7 @@ public function resolveEnvPlaceholders($value, $format = null, array &$usedEnvs
         }
         $envPlaceholders = $bag instanceof EnvPlaceholderParameterBag ? $bag->getEnvPlaceholders() : $this->envPlaceholders;
 
+        $completed = false;
         foreach ($envPlaceholders as $env => $placeholders) {
             foreach ($placeholders as $placeholder) {
                 if (false !== stripos($value, $placeholder)) {
@@ -1418,14 +1419,19 @@ public function resolveEnvPlaceholders($value, $format = null, array &$usedEnvs
                     }
                     if ($placeholder === $value) {
                         $value = $resolved;
+                        $completed = true;
                     } else {
                         if (!is_string($resolved) && !is_numeric($resolved)) {
-                            throw new RuntimeException(sprintf('A string value must be composed of strings and/or numbers, but found parameter "env(%s)" of type %s inside string value "%s".', $env, gettype($resolved), $value));
+                            throw new RuntimeException(sprintf('A string value must be composed of strings and/or numbers, but found parameter "env(%s)" of type %s inside string value "%s".', $env, gettype($resolved), $this->resolveEnvPlaceholders($value)));
                         }
                         $value = str_ireplace($placeholder, $resolved, $value);
                     }
                     $usedEnvs[$env] = $env;
                     $this->envCounters[$env] = isset($this->envCounters[$env]) ? 1 + $this->envCounters[$env] : 1;
+
+                    if ($completed) {
+                        break 2;
+                    }
                 }
             }
         }

src/Symfony/Component/DependencyInjection/Tests/ContainerBuilderTest.php

@@ -665,17 +665,49 @@ public function testCompileWithResolveEnv()
         putenv('DUMMY_ENV_VAR');
     }
 
+    public function testCompileWithArrayResolveEnv()
+    {
+        putenv('ARRAY={"foo":"bar"}');
+
+        $container = new ContainerBuilder();
+        $container->setParameter('foo', '%env(json:ARRAY)%');
+        $container->compile(true);
+
+        $this->assertSame(array('foo' => 'bar'), $container->getParameter('foo'));
+
+        putenv('ARRAY');
+    }
+
+    public function testCompileWithArrayAndAnotherResolveEnv()
+    {
+        putenv('DUMMY_ENV_VAR=abc');
+        putenv('ARRAY={"foo":"bar"}');
+
+        $container = new ContainerBuilder();
+        $container->setParameter('foo', '%env(json:ARRAY)%');
+        $container->setParameter('bar', '%env(DUMMY_ENV_VAR)%');
+        $container->compile(true);
+
+        $this->assertSame(array('foo' => 'bar'), $container->getParameter('foo'));
+        $this->assertSame('abc', $container->getParameter('bar'));
+
+        putenv('DUMMY_ENV_VAR');
+        putenv('ARRAY');
+    }
+
     /**
      * @expectedException \Symfony\Component\DependencyInjection\Exception\RuntimeException
-     * @expectedExceptionMessage A string value must be composed of strings and/or numbers, but found parameter "env(ARRAY)" of type array inside string value "ABC %env(ARRAY)%".
+     * @expectedExceptionMessage A string value must be composed of strings and/or numbers, but found parameter "env(json:ARRAY)" of type array inside string value "ABC %env(json:ARRAY)%".
      */
-    public function testCompileWithArrayResolveEnv()
+    public function testCompileWithArrayInStringResolveEnv()
     {
-        $bag = new TestingEnvPlaceholderParameterBag();
-        $container = new ContainerBuilder($bag);
-        $container->setParameter('foo', '%env(ARRAY)%');
-        $container->setParameter('bar', 'ABC %env(ARRAY)%');
+        putenv('ARRAY={"foo":"bar"}');
+
+        $container = new ContainerBuilder();
+        $container->setParameter('foo', 'ABC %env(json:ARRAY)%');
         $container->compile(true);
+
+        putenv('ARRAY');
     }
 
     /**
@@ -1418,11 +1450,3 @@ public function __construct(A $a)
     {
     }
 }
-
-class TestingEnvPlaceholderParameterBag extends EnvPlaceholderParameterBag
-{
-    public function get($name)
-    {
-        return 'env(array)' === strtolower($name) ? array(123) : parent::get($name);
-    }
-}