Move development mode check into ProjectGlobals

Author: markrandall

src/Framework/Build/BuildTools.php

@@ -155,7 +155,7 @@ public static function parseClassHierarchy(string $baseDir): array
     public static function getLastModifiedTime(): int
     {
         /* in development mode we always assume that we've recently refreshed our data */
-        if (isset($_ENV['DEVELOPMENT'])) {
+        if (ProjectGlobals::isDevelopmentMode()) {
             return time();
         }
 

src/ProjectGlobals.php

@@ -23,4 +23,9 @@ public static function getPublicRoot(): string
         return realpath(__DIR__ . '/../public')
             ?: throw new Error('Unable to locate public root');
     }
+
+    public static function isDevelopmentMode(): bool
+    {
+        return ($_ENV['DEVELOPMENT'] ?? '') === '1';
+    }
 }