Don't check default locale if Magento is not installed, fix NumberFormatter initialization when no currency is set

Author: Bartlomiejsz

lib/internal/Magento/Framework/Locale/Format.php

@@ -100,7 +100,7 @@ public function getPriceFormat($localeCode = null, $currencyCode = null)
         }
 
         $formatter = new \NumberFormatter(
-            $localeCode . '@currency=' . $currency->getCode(),
+            $currency->getCode() ? $localeCode . '@currency=' . $currency->getCode() : $localeCode,
             \NumberFormatter::CURRENCY
         );
         $format = $formatter->getPattern();

lib/internal/Magento/Framework/Locale/Resolver.php

@@ -6,6 +6,8 @@
 namespace Magento\Framework\Locale;
 
 use Magento\Framework\App\Config\ScopeConfigInterface;
+use Magento\Framework\App\DeploymentConfig;
+use Magento\Framework\App\ObjectManager;
 
 class Resolver implements ResolverInterface
 {
@@ -47,21 +49,29 @@ class Resolver implements ResolverInterface
      */
     protected $emulatedLocales = [];
 
+    /**
+     * @var DeploymentConfig
+     */
+    private $deploymentConfig;
+
     /**
      * @param ScopeConfigInterface $scopeConfig
      * @param string $defaultLocalePath
      * @param string $scopeType
      * @param mixed $locale
+     * @param DeploymentConfig|null $deploymentConfig
      */
     public function __construct(
         ScopeConfigInterface $scopeConfig,
         $defaultLocalePath,
         $scopeType,
-        $locale = null
+        $locale = null,
+        DeploymentConfig $deploymentConfig = null
     ) {
         $this->scopeConfig = $scopeConfig;
         $this->defaultLocalePath = $defaultLocalePath;
         $this->scopeType = $scopeType;
+        $this->deploymentConfig = $deploymentConfig ?: ObjectManager::getInstance()->create(DeploymentConfig::class);
         $this->setLocale($locale);
     }
 
@@ -88,7 +98,10 @@ public function setDefaultLocale($locale)
     public function getDefaultLocale()
     {
         if (!$this->defaultLocale) {
-            $locale = $this->scopeConfig->getValue($this->getDefaultLocalePath(), $this->scopeType);
+            $locale = false;
+            if ($this->deploymentConfig->isAvailable() && $this->deploymentConfig->isDbAvailable()) {
+                $locale = $this->scopeConfig->getValue($this->getDefaultLocalePath(), $this->scopeType);
+            }
             if (!$locale) {
                 $locale = self::DEFAULT_LOCALE;
             }