Resolve #22

Add listing for all units

Author: icanhazstring

src/Command/SymfonyCommand.php

@@ -14,9 +14,18 @@
  */
 class SymfonyCommand implements CommandInterface
 {
+    /**
+     * List of valid exit codes of systemctl commands.
+     * When systemctl is-active is checked on a non active unit, we receive exit code 3
+     */
+    private const VALID_EXITCODES = [0, 3];
+
     /** @var Process */
     private $process;
 
+    /**
+     * @param Process $process
+     */
     public function __construct(Process $process)
     {
         $this->process = $process;
@@ -45,7 +54,9 @@ public function run(): CommandInterface
     {
         $this->process->run();
 
-        if (!$this->process->isSuccessful()) {
+        $exitCode = $this->process->getExitCode();
+
+        if (!\in_array((int)$exitCode, self::VALID_EXITCODES, true)) {
             throw new CommandFailedException($this->process->getErrorOutput());
         }
 

src/SystemCtl.php

@@ -123,7 +123,7 @@ public static function setAssetPath(string $assetPath): void
      */
     public function listUnits(?string $unitPrefix = null, array $unitTypes = self::SUPPORTED_UNITS): array
     {
-        $commands = ['list-units'];
+        $commands = ['--all', 'list-units'];
 
         if ($unitPrefix) {
             $commands[] = $unitPrefix;