Add simple license check

src/Commands/StaticSiteGenerate.php

@@ -55,6 +55,18 @@ public function handle()
     {
         Partyline::bind($this);
 
+        if (config('statamic.editions.pro') && ! config('statamic.system.license_key')) {
+            $this->error('Statamic Pro is enabled but no site license was found.');
+            $this->warn('Please set a valid Statamic License Key in your .env file.');
+            $confirmationText = 'By continuing you agree that this build is for testing purposes only. Do you wish to continue?';
+
+            if (! $this->option('no-interaction') && ! $this->confirm($confirmationText)) {
+                $this->line('Static site generation canceled.');
+
+                return 0;
+            }
+        }
+
         if (! $workers = $this->option('workers')) {
             $this->comment('You may be able to speed up site generation significantly by installing spatie/fork and using multiple workers (requires PHP 8+).');
         }

tests/Concerns/RunsGeneratorCommand.php

@@ -26,6 +26,8 @@ protected function generate($options = [])
     {
         $this->assertFalse($this->files->exists($this->destination));
 
+        $options['--no-interaction'] ??= true;
+
         $this
             ->artisan('statamic:ssg:generate', $options)
             ->doesntExpectOutputToContain('pages not generated');