#2542 Add taxonomy delete command.

config/services/drupal-console/taxonomy.yml

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+services:
+  taxonomy_delete:
+     class: Drupal\Console\Command\Taxonomy\DeleteCommand
+      tags:
+        - { name: console.command }

config/translations/en/taxonomy.term.delete.yml

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+description: 'Delete taxonomy terms from a vocabulary, command takes the VID as argument or all which will delete every term from every vocabulary'

src/Command/Taxonomy/DeleteTermCommand.php

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+<?php
+
+namespace Drupal\Console\Command\Taxonomy;
+
+use Symfony\Component\Console\Input\InputInterface;
+use Symfony\Component\Console\Output\OutputInterface;
+use Symfony\Component\Console\Command\Command;
+use Drupal\Console\Command\Shared\ContainerAwareCommandTrait;
+use Drupal\Console\Style\DrupalStyle;
+use Symfony\Component\Console\Input\InputArgument;
+
+/**
+ * Class DeleteTermCommand.
+ *
+ * @package Drupal\eco_migrate
+ */
+class DeleteTermCommand extends Command {
+
+  use ContainerAwareCommandTrait;
+
+  use TermDeletionTrait;
+
+  /**
+   * {@inheritdoc}
+   */
+  protected function configure() {
+    $this
+      ->setName('taxonomy:term:delete')
+      ->setDescription($this->trans('commands.taxonomy.term.delete.description'))
+      ->addArgument('vid',InputArgument::REQUIRED);
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  protected function execute(InputInterface $input, OutputInterface $output) {
+
+    $io = new DrupalStyle($input, $output);
+
+    $this->deleteExistingTerms($input->getArgument('vid'), $io);
+
+  }
+
+}

src/Command/Taxonomy/TermDeletionTrait.php

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+<?php
+/**
+ * Created by PhpStorm.
+ * User: twhiston
+ * Date: 28/07/16
+ * Time: 10:53
+ */
+
+namespace Drupal\Console\Command\Taxonomy;
+
+use Drupal\taxonomy\Entity\Term;
+use Drupal\taxonomy\Entity\Vocabulary;
+
+
+trait TermDeletionTrait {
+
+
+  /**
+   * Destroy all existing terms before import
+   * @param $vid
+   * @throws \Exception
+   */
+  private function deleteExistingTerms($vid = null,$io)
+  {
+    //Load the vid
+    $vocabularies = Vocabulary::loadMultiple();
+
+    if($vid !== 'all'){
+      $vid = [$vid];
+    } else {
+      $vid = array_keys($vocabularies);
+    }
+
+    foreach ($vid as $item) {
+      if (!isset($vocabularies[$item])) {
+        throw new \Exception("vid {$item} does not exist");
+      }
+      $selected_vocab = $vocabularies[$item];
+      $terms = \Drupal::getContainer()
+        ->get('entity.manager')
+        ->getStorage('taxonomy_term')
+        ->loadTree($selected_vocab->id());
+
+      foreach ($terms as $term) {
+        $treal = Term::load($term->tid);
+        if($treal !== null){
+          $io->info("Deleting {$term->name} and all translations");
+          $treal->delete();
+        }
+      }
+    }
+
+  }
+
+}