CLI-1282: [remote:aliases:download] warning on read-only directory

src/Command/Remote/AliasesDownloadCommand.php

@@ -130,7 +130,13 @@ protected function downloadDrush9Aliases(InputInterface $input, string $aliasVer
         $drushFiles[] = $baseDir . '/' . $file->getFileName();
       }
     }
-    $archive->extractTo($drushAliasesDir, $drushFiles, TRUE);
+    try {
+      // Throws warnings on permissions errors.
+      @$archive->extractTo($drushAliasesDir, $drushFiles, TRUE);
+    }
+    catch (\Exception) {
+      throw new AcquiaCliException('Could not extract aliases to {destination}', ['destination' => $drushAliasesDir]);
+    }
   }
 
   protected function downloadDrush8Aliases(string $aliasVersion, string $drushArchiveTempFilepath, string $drushAliasesDir): void {

src/EventListener/ExceptionListener.php

@@ -67,6 +67,8 @@ public function onConsoleError(ConsoleErrorEvent $event): void {
         case 'This machine is not yet authenticated with Site Factory.':
           $this->helpMessages[] = 'Run `acli auth:acsf-login` to re-authenticate with Site Factory.';
           break;
+        case 'Could not extract aliases to {destination}':
+          $this->helpMessages[] = 'Check that you have write access to the directory';
       }
     }
 

tests/phpunit/src/Misc/ExceptionListenerTest.php

@@ -90,6 +90,10 @@ public function providerTestHelp(): array {
         new AcquiaCliException('This machine is not yet authenticated with Site Factory.'),
         'Run `acli auth:acsf-login` to re-authenticate with Site Factory.',
       ],
+      [
+        new AcquiaCliException('Could not extract aliases to {destination}'),
+        'Check that you have write access to the directory',
+      ],
       [
         new ApiErrorException((object) ['error' => '', 'message' => "There are no available Cloud IDEs for this application.\n"]),
         'Delete an existing IDE via <bg=blue;fg=white;options=bold>acli ide:delete</> or contact your Account Manager or Acquia Sales to purchase additional IDEs.',