bug #23498 [Process] Fixed issue between process builder and exec (lyrixx)

This PR was merged into the 3.3 branch.

Discussion
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[Process] Fixed issue between process builder and exec

| Q             | A
| ------------- | ---
| Branch?       | 3.3
| Bug fix?      | yes
| New feature?  | no
| BC breaks?    | no
| Deprecations? | no
| Tests pass?   | yes/
| Fixed tickets | #23495
| License       | MIT
| Doc PR        | -

Commits
-------

8cd1a2d [Process] Fixed issue between process builder and exec

src/Symfony/Component/Process/ProcessBuilder.php

@@ -272,6 +272,9 @@ class ProcessBuilder
 
         $arguments = array_merge($this->prefix, $this->arguments);
         $process = new Process($arguments, $this->cwd, $this->env, $this->input, $this->timeout, $this->options);
+        // to preserve the BC with symfony <3.3, we convert the array structure
+        // to a string structure to avoid the prefixing with the exec command
+        $process->setCommandLine($process->getCommandLine());
 
         if ($this->inheritEnv) {
             $process->inheritEnvironmentVariables();

src/Symfony/Component/Process/Tests/ProcessBuilderTest.php

@@ -210,4 +210,17 @@ class ProcessBuilderTest extends TestCase
         $builder = ProcessBuilder::create();
         $builder->setInput(array());
     }
+
+    public function testDoesNotPrefixExec()
+    {
+        if ('\\' === DIRECTORY_SEPARATOR) {
+            $this->markTestSkipped('This test cannot run on Windows.');
+        }
+
+        $builder = ProcessBuilder::create(array('command', '-v', 'ls'));
+        $process = $builder->getProcess();
+        $process->run();
+
+        $this->assertTrue($process->isSuccessful());
+    }
 }