Give commands proper exit codes.

app/Console/Commands/Import.php

@@ -59,7 +59,7 @@ class Import extends Command
      *
      * @throws FireflyException
      */
-    public function handle(): void
+    public function handle(): int
     {
         Log::debug('Start start-import command');
         $jobKey = $this->argument('key');
@@ -67,12 +67,12 @@ class Import extends Command
         if (null === $job) {
             $this->errorLine(sprintf('No job found with key "%s"', $jobKey));
 
-            return;
+            return 1;
         }
         if (!$this->isValid($job)) {
             $this->errorLine('Job is not valid for some reason. Exit.');
 
-            return;
+            return 1;
         }
 
         $this->infoLine(sprintf('Going to import job with key "%s" of type "%s"', $job->key, $job->file_type));
@@ -106,6 +106,8 @@ class Import extends Command
         }
 
         $this->infoLine(sprintf('The import has finished. %d transactions have been imported.', $count));
+
+        return 0;
     }
 
     /**

app/Console/Commands/ScanAttachments.php

@@ -54,7 +54,7 @@ class ScanAttachments extends Command
     /**
      * Execute the console command.
      */
-    public function handle(): void
+    public function handle(): int
     {
         $attachments = Attachment::get();
         $disk        = Storage::disk('upload');
@@ -82,5 +82,6 @@ class ScanAttachments extends Command
             $attachment->save();
             $this->line(sprintf('Fixed attachment #%d', $attachment->id));
         }
+        return 0;
     }
 }

app/Console/Commands/UpgradeDatabase.php

@@ -82,7 +82,7 @@ class UpgradeDatabase extends Command
     /**
      * Execute the console command.
      */
-    public function handle(): void
+    public function handle(): int
     {
         $this->setTransactionIdentifier();
         $this->updateAccountCurrencies();
@@ -96,6 +96,8 @@ class UpgradeDatabase extends Command
         $this->migrateBillsToRules();
 
         $this->info('Firefly III database is up to date.');
+
+        return 0;
     }
 
     /**

app/Console/Commands/UpgradeFireflyInstructions.php

@@ -46,7 +46,7 @@ class UpgradeFireflyInstructions extends Command
     /**
      * Execute the console command.
      */
-    public function handle(): void
+    public function handle(): int
     {
         if ('update' === $this->argument('task')) {
             $this->updateInstructions();
@@ -54,6 +54,7 @@ class UpgradeFireflyInstructions extends Command
         if ('install' === $this->argument('task')) {
             $this->installInstructions();
         }
+        return 0;
     }
 
     /**

app/Console/Commands/UseEncryption.php

@@ -47,7 +47,7 @@ class UseEncryption extends Command
     /**
      * Execute the console command.
      */
-    public function handle(): void
+    public function handle(): int
     {
         if (true === config('firefly.encryption')) {
             $this->info('Firefly III configuration calls for encrypted data.');
@@ -62,6 +62,7 @@ class UseEncryption extends Command
         $this->handleObjects('Category', 'name', 'encrypted');
         $this->handleObjects('PiggyBank', 'name', 'encrypted');
         $this->handleObjects('TransactionJournal', 'description', 'encrypted');
+        return 0;
     }
 
     /**

app/Console/Commands/VerifyDatabase.php

@@ -69,11 +69,11 @@ class VerifyDatabase extends Command
     /**
      * Execute the console command.
      */
-    public function handle(): void
+    public function handle(): int
     {
         // if table does not exist, return false
         if (!Schema::hasTable('users')) {
-            return;
+            return 1;
         }
 
         $this->reportEmptyBudgets();
@@ -94,6 +94,8 @@ class VerifyDatabase extends Command
         $this->fixDoubleAmounts();
         $this->fixBadMeta();
         $this->removeBills();
+
+        return 0;
     }
 
     /**