Fix missing shebang after update (BrainMaestro#9)

This will also add and test the shebang on update.

Author: Patrick

src/Commands/UpdateCommand.php

@@ -41,6 +41,13 @@ protected function execute(InputInterface $input, OutputInterface $output)
             $filename = "{$gitDir}/hooks/{$hook}";
 
             $operation = file_exists($filename) ? 'Updated' : 'Added';
+
+            if (strtoupper(substr(PHP_OS, 0, 3)) === 'WIN') {
+                // On windows we need to add a SHEBANG
+                // See: https://github.com/BrainMaestro/composer-git-hooks/issues/7
+                $script = '#!/bin/bash' . PHP_EOL . $script;
+            }
+
             file_put_contents($filename, $script);
             chmod($filename, 0755);
             $output->writeln("{$operation} <info>{$hook}</info> hook");

tests/UpdateCommandTest.php

@@ -45,6 +45,23 @@ public function it_updates_hooks_that_already_exist()
         }
     }
 
+    public function it_adds_shebang_to_hooks_on_windows()
+    {
+        if(strtoupper(substr(PHP_OS, 0, 3)) !== 'WIN')
+            $this->markTestSkipped('This test is only relevant on windows. You\'re running Linux.');
+
+        self::createHooks();
+        $this->commandTester->execute([]);
+
+        foreach (array_keys(self::$hooks) as $hook) {
+            $this->assertContains("Updated {$hook} hook", $this->commandTester->getDisplay());
+
+            $content = file_get_contents(".git/hooks/" . $hook);
+            $this->assertNotFalse(strpos($content, "#!/bin/bash"));
+            $this->assertEquals(strpos($content, "#!/bin/bash"), 0);
+        }
+    }
+
     /**
      * @test
      */