Create destination directory if not already exists (#4)

CHANGELOG.md

@@ -4,6 +4,10 @@ All notable changes to this project will be documented in this file.
 The format is based on [Keep a Changelog](http://keepachangelog.com/en/1.0.0/)
 and this project adheres to [Semantic Versioning](http://semver.org/spec/v2.0.0.html).
 
+## 1.2.2
+### Fixed
+- Parent directory at destination is now created if it did not exist already.
+
 ## 1.2.1
 ### Changed
 - Package is now also installable in PHP 8.

src/FileInstaller.php

@@ -10,6 +10,7 @@
 namespace Youwe\Composer;
 
 use Composer\IO\IOInterface;
+use RuntimeException;
 use SplFileObject;
 use Youwe\FileMapping\FileMappingInterface;
 use Youwe\FileMapping\FileMappingReaderInterface;
@@ -67,8 +68,15 @@ public function install(IOInterface $io)
      */
     public function installFile(FileMappingInterface $mapping)
     {
+        $destination = $mapping->getDestination();
+        $parent = dirname($destination);
+
+        if (!is_dir($parent) && !mkdir($parent, 0755, true) && !is_dir($parent)) {
+            throw new RuntimeException("Directory \"$parent\" could not be created");
+        }
+
         $inputFile  = new SplFileObject($mapping->getSource(), 'r');
-        $targetFile = new SplFileObject($mapping->getDestination(), 'w+');
+        $targetFile = new SplFileObject($destination, 'w+');
 
         foreach ($inputFile as $input) {
             $targetFile->fwrite($input);

tests/FileInstallerTest.php

@@ -83,6 +83,51 @@ public function testInstallFile()
         );
     }
 
+    /**
+     * @return void
+     * @covers ::installFile
+     */
+    public function testInstallFileWhenDestinationPathNotExistsYet()
+    {
+        /** @var FileMappingReaderInterface $reader */
+        $reader = $this->createMock(FileMappingReaderInterface::class);
+        $installer = new FileInstaller($reader);
+
+        $fs = vfsStream::setup(
+            sha1(__METHOD__),
+            null,
+            [
+                'source' => [
+                    'foo.php' => 'Foo'
+                ],
+                'destination' => []
+            ]
+        );
+
+        /** @var FileMappingInterface|PHPUnit_Framework_MockObject_MockObject $mapping */
+        $mapping = $this->createMock(FileMappingInterface::class);
+        $mapping
+            ->expects($this->once())
+            ->method('getSource')
+            ->willReturn(
+                $fs->getChild('source/foo.php')->url()
+            );
+
+        $mapping
+            ->expects($this->once())
+            ->method('getDestination')
+            ->willReturn(
+                $fs->getChild('destination')->url() . '/path/to/foo.php'
+            );
+
+        $installer->installFile($mapping);
+
+        $this->assertStringEqualsFile(
+            $fs->getChild('destination/path/to/foo.php')->url(),
+            'Foo'
+        );
+    }
+
     /**
      * @return void
      * @covers ::install