Adding task to generate migration files

classes/minion/task/db/generate.php

@@ -0,0 +1,105 @@
+<?php
+
+/**
+ * The generate task provides an easy way to create migration files
+ *
+ * Available config options are:
+ *
+ * --location=path/to/migration/location
+ *  
+ *  This is a required config option, use it specify in which location the 
+ *  migration should be stored.  Due to the nature of the cascading filesystem 
+ *  minion doesn't automatically know where a migration is stored so make sure 
+ *  you pass in the full path to your migrations folder, e.g.
+ *
+ *  # The location of the migrations folder is modules/myapp/migrations/myapp/
+ *  --location=modules/myapp/migrations/myapp/
+ *
+ *  On nix based systems you should be able to tab complete the path
+ *
+ * --description="Description of migration here"
+ *
+ *  This is an arbitrary description of the migration, used to build the 
+ *  filename.  It is required but can be changed manually later on without 
+ *  affecting the integrity of the migration.
+ *
+ *  The description will be 
+ *
+ * @author Matt Button <matthew@sigswitch.com>
+ */
+class Minion_Task_Db_Generate extends Minion_Task
+{
+	/**
+	 * A set of config options that this task accepts
+	 * @var array
+	 */
+	protected $_config = array(
+		'location',
+		'description'
+	);
+
+	/**
+	 * Execute the task
+	 *
+	 * @param array Configuration
+	 */
+	public function execute(array $config)
+	{
+		if(empty($config['location']) OR empty($config['description']))
+		{
+			return 'Please provide --location and --description'.PHP_EOL.
+			       'See help for more info'.PHP_EOL;
+		}
+
+		$location    = rtrim(realpath($config['location']), '/').'/';
+		$description = $config['description'];
+
+		// {year}{month}{day}{hour}{minute}{second}
+		$time  = date('YmdGis');
+		$class = $this->_generate_classname($location, $time);
+		$file  = $this->_generate_filename($location, $time, $description);
+
+
+		$data = Kohana::FILE_SECURITY.View::factory('minion/task/db/generate/template')
+			->set('class', $class)
+			->set('description', $description)
+			->render();
+
+		file_put_contents($file, $data);
+
+		return 'Migration generated in '.$file.PHP_EOL;
+	}
+
+	/**
+	 * Generate a class name from the location
+	 *
+	 * @param  string location
+	 * @param  string Timestamp
+	 * @return string Class name
+	 */
+	protected function _generate_classname($location, $time)
+	{
+		// Chop up everything up until the relative path
+		$location = substr($location, strrpos($location, 'migrations/') + 11);
+
+		$class = ucwords(str_replace('/', ' ', $location));
+
+		return 'Migration_'.preg_replace('~[^a-zA-Z0-9]+~', '_', $class.'_'.$time);
+	}
+
+	/**
+	 * Generates a filename from the location, time and description
+	 *
+	 * @param  string Location to store migration
+	 * @param  string Timestamp
+	 * @param  string Description
+	 * @return string Filename
+	 */
+	public function _generate_filename($location, $time, $description)
+	{
+		$description = substr(strtolower($description), 0, 100);
+
+		return $location.$time.'_'.preg_replace('~[^a-z]+~', '-', $description).EXT;
+	}
+
+}

views/minion/task/db/generate/template.php

@@ -0,0 +1,27 @@
+
+
+/**
+ * <?php echo $description.PHP_EOL; ?>
+ */
+class <?php echo $class; ?> extends Minion_Task {
+
+	/**
+	 * Run queries needed to apply this migration
+	 *
+	 * @param Kohana_Database Database connection
+	 */
+	public function up(Kohana_Database $db)
+	{
+		// $db->query(NULL, 'CREATE TABLE ... ');
+	}
+
+	/**
+	 * Run queries need to remove this migration
+	 *
+	 * @param Kohana_Database Database connection
+	 */
+	public function down(Kohana_Database $db)
+	{
+		// $db->query(NULL, 'DROP TABLE ... ');
+	}
+}