add required console command return codes

src/Phpmig/Console/Command/DownCommand.php

@@ -58,15 +58,17 @@ protected function execute(InputInterface $input, OutputInterface $output)
         $version = $input->getArgument('version');
 
         if (!in_array($version, $versions)) {
-            return;
+            return 0;
         }
 
         if (!isset($migrations[$version])) {
-            return;
+            return 0;
         }
 
         $container = $this->getContainer();
         $container['phpmig.migrator']->down($migrations[$version]);
+
+        return 0;
     }
 }
 

src/Phpmig/Console/Command/GenerateCommand.php

@@ -153,7 +153,7 @@ public function down()
             '.' . str_replace(getcwd(), '', $path)
         );
 
-        return;
+        return 0;
     }
 
     protected function transMigName($migrationName)

src/Phpmig/Console/Command/MigrateCommand.php

@@ -112,5 +112,7 @@ protected function execute(InputInterface $input, OutputInterface $output)
                 $container['phpmig.migrator']->up($migration);
             }
         }
+
+        return 0;
     }
 }

src/Phpmig/Console/Command/RedoCommand.php

@@ -58,16 +58,18 @@ protected function execute(InputInterface $input, OutputInterface $output)
         $version = $input->getArgument('version');
 
         if (!in_array($version, $versions)) {
-            return;
+            return 0;
         }
 
         if (!isset($migrations[$version])) {
-            return;
+            return 0;
         }
 
         $container = $this->getContainer();
         $container['phpmig.migrator']->down($migrations[$version]);
         $container['phpmig.migrator']->up($migrations[$version]);
+
+        return 0;
     }
 }
 

src/Phpmig/Console/Command/RollbackCommand.php

@@ -55,7 +55,7 @@ protected function execute(InputInterface $input, OutputInterface $output)
 
         $migrations = $this->getMigrations();
         $versions   = $this->getAdapter()->fetchAll();
-        
+
         $version = $input->getOption('target');
 
         ksort($migrations);
@@ -64,9 +64,9 @@ protected function execute(InputInterface $input, OutputInterface $output)
         // Check we have at least 1 migration to revert
         if (empty($versions) || $version == end($versions)) {
             $output->writeln("<error>No migrations to rollback</error>");
-            return;
+            return 0;
         }
-        
+
         // If no target version was supplied, revert the last migration
         if (null === $version) {
             // Get the migration before the last run migration
@@ -75,17 +75,17 @@ protected function execute(InputInterface $input, OutputInterface $output)
         } else {
             // Get the first migration number
             $first = reset($versions);
-            
+
             // If the target version is before the first migration, revert all migrations
             if ($version < $first) {
                 $version = 0;
             }
         }
-        
+
         // Check the target version exists
         if (0 !== $version && !isset($migrations[$version])) {
             $output->writeln("<error>Target version ($version) not found</error>");
-            return;
+            return 0;
         }
 
         // Revert the migration(s)
@@ -100,5 +100,7 @@ protected function execute(InputInterface $input, OutputInterface $output)
                 $container['phpmig.migrator']->down($migration);
             }
         }
+
+        return 0;
     }
 }

src/Phpmig/Console/Command/StatusCommand.php

@@ -54,7 +54,7 @@ protected function execute(InputInterface $input, OutputInterface $output)
 
         $versions = $this->getAdapter()->fetchAll();
         foreach($this->getMigrations() as $migration) {
-            
+
             if (in_array($migration->getVersion(), $versions)) {
                 $status = "     <info>up</info> ";
                 unset($versions[array_search($migration->getVersion(), $versions)]);
@@ -63,23 +63,23 @@ protected function execute(InputInterface $input, OutputInterface $output)
             }
 
             $output->writeln(
-                $status . 
-                sprintf(" %14s ", $migration->getVersion()) . 
+                $status .
+                sprintf(" %14s ", $migration->getVersion()) .
                 " <comment>" . $migration->getName() . "</comment>"
             );
         }
 
         foreach($versions as $missing) {
             $output->writeln(
-                '   <error>up</error> ' . 
-                sprintf(" %14s ", $missing) . 
+                '   <error>up</error> ' .
+                sprintf(" %14s ", $missing) .
                 ' <error>** MISSING **</error> '
             );
         }
 
         // print status
         $output->writeln("");
-        return;
+        return 0;
     }
 }
 

src/Phpmig/Console/Command/UpCommand.php

@@ -58,15 +58,17 @@ protected function execute(InputInterface $input, OutputInterface $output)
         $version = $input->getArgument('version');
 
         if (in_array($version, $versions)) {
-            return;
+            return 0;
         }
 
         if (!isset($migrations[$version])) {
-            return;
+            return 0;
         }
 
         $container = $this->getContainer();
         $container['phpmig.migrator']->up($migrations[$version]);
+
+        return 0;
     }
 }