MAGETWO-38174: Create skeleton command

 - Text updated from CR feedback.
 - Move the enable/disable maintenance logic inside try-catch block.
 - Keep maintenance mode enabled if any exception occurred and provide the message to remind user.
 - Updated the similar logic in module uninstall command.

Author: Fred Sung

app/code/Magento/Theme/Console/Command/ThemeUninstallCommand.php

@@ -168,7 +168,7 @@ protected function configure()
             self::INPUT_KEY_THEMES,
             InputArgument::IS_ARRAY | InputArgument::REQUIRED,
             'Path of the theme. Theme path should be specified as full path which is area/vendor/name.'
-            . ' For example, frontend/Magento/Blank'
+            . ' For example, frontend/Magento/blank'
         );
         $this->addOption(
             self::INPUT_KEY_CLEAR_STATIC_CONTENT,
@@ -208,10 +208,9 @@ protected function execute(InputInterface $input, OutputInterface $output)
             return;
         }
 
-        $output->writeln('<info>Enabling maintenance mode</info>');
-        $this->maintenanceMode->set(true);
-
         try {
+            $output->writeln('<info>Enabling maintenance mode</info>');
+            $this->maintenanceMode->set(true);
             if ($input->getOption(self::INPUT_KEY_BACKUP_CODE)) {
                 $time = time();
                 $codeBackup = $this->backupRollbackFactory->create($output);
@@ -226,11 +225,11 @@ protected function execute(InputInterface $input, OutputInterface $output)
             }
             $this->remove->remove($themePackages);
             $this->cleanup($input, $output);
-        } catch (\Exception $e) {
-            $output->writeln('<error>' . $e->getMessage() . '</error>');
-        } finally {
             $output->writeln('<info>Disabling maintenance mode</info>');
             $this->maintenanceMode->set(false);
+        } catch (\Exception $e) {
+            $output->writeln('<error>' . $e->getMessage() . '</error>');
+            $output->writeln('<error>Please disable maintenance mode after you resolved above issues</error>');
         }
     }
 

setup/src/Magento/Setup/Console/Command/ModuleUninstallCommand.php

@@ -236,8 +236,6 @@ protected function execute(InputInterface $input, OutputInterface $output)
             return;
         }
 
-        $output->writeln('<info>Enabling maintenance mode</info>');
-        $this->maintenanceMode->set(true);
         $helper = $this->getHelper('question');
         $question = new ConfirmationQuestion(
             'You are about to remove code and database tables. Are you sure?[y/N]',
@@ -247,6 +245,8 @@ protected function execute(InputInterface $input, OutputInterface $output)
             return;
         }
         try {
+            $output->writeln('<info>Enabling maintenance mode</info>');
+            $this->maintenanceMode->set(true);
             $this->takeBackup($input, $output);
             $dbBackupOption = $input->getOption(self::INPUT_KEY_BACKUP_DB);
             if ($input->getOption(self::INPUT_KEY_REMOVE_DATA)) {
@@ -277,11 +277,11 @@ protected function execute(InputInterface $input, OutputInterface $output)
             $output->writeln('<info>Removing code from Magento codebase:</info>');
             $this->removeCode($modules);
             $this->cleanup($input, $output);
-        } catch (\Exception $e) {
-            $output->writeln('<error>' . $e->getMessage() . '</error>');
-        } finally {
             $output->writeln('<info>Disabling maintenance mode</info>');
             $this->maintenanceMode->set(false);
+        } catch (\Exception $e) {
+            $output->writeln('<error>' . $e->getMessage() . '</error>');
+            $output->writeln('<error>Please disable maintenance mode after you resolved above issues</error>');
         }
     }