Add frontend template hints status command

app/code/Magento/Developer/Console/Command/TemplateHintsStatusCommand.php

@@ -0,0 +1,78 @@
+<?php
+/**
+ * Copyright © Magento, Inc. All rights reserved.
+ * See COPYING.txt for license details.
+ */
+declare(strict_types=1);
+
+namespace Magento\Developer\Console\Command;
+
+use Symfony\Component\Console\Command\Command;
+use Symfony\Component\Console\Input\InputInterface;
+use Symfony\Component\Console\Output\OutputInterface;
+use Magento\Framework\App\Config\ScopeConfigInterface;
+use Magento\Framework\App\Config\ReinitableConfigInterface;
+use Magento\Framework\Console\Cli;
+
+/**
+ * Command to show frontend template hints status
+ */
+class TemplateHintsStatusCommand extends Command
+{
+
+    const COMMAND_NAME = 'dev:template-hints:status';
+    const TEMPLATE_HINTS_STOREFRONT_PATH = 'dev/debug/template_hints_storefront';
+
+    /**
+     * @var ScopeConfigInterface
+     */
+    private $scopeConfig;
+    /**
+     * @var ReinitableConfigInterface
+     */
+    private $reinitableConfig;
+
+    /**
+     * Initialize dependencies.
+     *
+     * @param ScopeConfigInterface $scopeConfig
+     * @param ReinitableConfigInterface $reinitableConfig
+     */
+    public function __construct(
+        ScopeConfigInterface $scopeConfig,
+        ReinitableConfigInterface $reinitableConfig
+    )
+    {
+        parent::__construct();
+        $this->scopeConfig = $scopeConfig;
+        $this->reinitableConfig = $reinitableConfig;
+    }
+
+    /**
+     * @inheritdoc
+     */
+    protected function configure()
+    {
+        $this->setName(self::COMMAND_NAME)
+            ->setDescription('Show frontend template hints status.');
+
+        parent::configure();
+    }
+
+    /**
+     * @inheritdoc
+     * @throws \InvalidArgumentException
+     */
+    protected function execute(InputInterface $input, OutputInterface $output)
+    {
+        $this->reinitableConfig->reinit();
+        $templateHintsStatus =
+            $this->scopeConfig->isSetFlag(self::TEMPLATE_HINTS_STOREFRONT_PATH, 'default')
+                ? 'enabled'
+                : 'disabled';
+        $templateHintsMessage = __("Template hints are %status", ['status' => $templateHintsStatus]);
+        $output->writeln("<info>" . $templateHintsMessage . "</info>");
+
+        return Cli::RETURN_SUCCESS;
+    }
+}

app/code/Magento/Developer/Test/Unit/Console/Command/TemplateHintsStatusCommandTest.php

@@ -0,0 +1,63 @@
+<?php
+/**
+ * Copyright © Magento, Inc. All rights reserved.
+ * See COPYING.txt for license details.
+ */
+
+namespace Magento\Developer\Test\Unit\Console\Command;
+
+use PHPUnit\Framework\TestCase;
+use Symfony\Component\Console\Tester\CommandTester;
+use Magento\Developer\Console\Command\TemplateHintsStatusCommand;
+use Magento\Framework\App\Config\ScopeConfigInterface;
+use Magento\Framework\App\Config\ReinitableConfigInterface;
+
+/**
+ * Class TemplateHintsStatusCommandTest
+ *
+ * Tests dev:template-hints:status command.
+ */
+class TemplateHintsStatusCommandTest extends TestCase
+{
+    /**
+     * @var TemplateHintsStatusCommand
+     */
+    private $command;
+
+    /**
+     * @var ScopeConfigInterface
+     */
+    private $scopeConfigMock;
+    /**
+     * @var ReinitableConfigInterface
+     */
+    private $reinitableConfigMock;
+
+    protected function setUp()
+    {
+        $this->scopeConfigMock = $this->getMockForAbstractClass(ScopeConfigInterface::class);
+        $this->reinitableConfigMock = $this->getMockForAbstractClass(ReinitableConfigInterface::class);
+
+        $this->command = new TemplateHintsStatusCommand(
+            $this->scopeConfigMock,
+            $this->reinitableConfigMock
+        );
+
+    }
+
+    public function testExecute()
+    {
+        $tester = new CommandTester($this->command);
+        $tester->execute([]);
+
+        $this->assertContains(
+            'disabled',
+            $tester->getDisplay()
+        );
+
+        $this->assertEquals(
+            0,
+            $tester->getStatusCode()
+        );
+    }
+}

app/code/Magento/Developer/etc/di.xml

@@ -105,6 +105,7 @@
                 <item name="dev_query_log_disable" xsi:type="object">Magento\Developer\Console\Command\QueryLogDisableCommand</item>
                 <item name="dev_template_hints_disable" xsi:type="object">Magento\Developer\Console\Command\TemplateHintsDisableCommand</item>
                 <item name="dev_template_hints_enable" xsi:type="object">Magento\Developer\Console\Command\TemplateHintsEnableCommand</item>
+                <item name="dev_template_hints_status" xsi:type="object">Magento\Developer\Console\Command\TemplateHintsStatusCommand</item>
                 <item name="dev_profiler_disable" xsi:type="object">Magento\Developer\Console\Command\ProfilerDisableCommand</item>
                 <item name="dev_profiler_enable" xsi:type="object">Magento\Developer\Console\Command\ProfilerEnableCommand</item>
                 <item name="dev_generate_patch" xsi:type="object">Magento\Developer\Console\Command\GeneratePatchCommand</item>