New plugin:upgrade command

commands/plugin/upgrade.php

@@ -0,0 +1,39 @@
+<?php
+
+declare(strict_types = 1);
+
+use Kirby\CLI\CLI;
+use Kirby\Filesystem\Dir;
+
+return [
+	'description' => 'Upgrades a kirby plugin',
+	'args' => [
+		'repo' => [
+			'description' => 'The Kirby plugin registry name (i.e. getkirby/kql)',
+			'required'    => true
+		],
+		'version' => [
+			'description'  => 'The version corresponding with the tag name in the repo',
+			'defaultValue' => 'latest'
+		]
+	],
+	'command' => static function (CLI $cli): void {
+		$repo = $cli->arg('repo');
+		$version = $cli->arg('version');
+
+		if ($plugin = $cli->kirby()->plugin($repo)) {
+			try {
+				// move plugin directory to prevent overwrite
+				Dir::move($plugin->root(), $plugin->root() . '.bak');
+				$cli->run('plugin:install', $repo, $version);
+				Dir::remove($plugin->root() . '.bak');
+				$cli->success('The ' . $repo . ' plugin has been updated to ' . $version . ' version');
+			} catch (Throwable) {
+				Dir::move($plugin->root() . '.bak', $plugin->root());
+				$cli->error('The ' . $repo . ' plugin could not updated');
+			}
+		} else {
+			$cli->error('The ' . $repo . ' plugin could not found');
+		}
+	}
+];