Allow some gitignored files

Problem/Motivation

We had a problem doing composer install inside artifact_deployment since we need an auth.json file which is generated during the pipeline and present in .gitignore

Proposed resolution

Here is a quick fix patch to add the auth.json file. But a more general approach to tell the tool which files to include anyway would be nice.

diff --git a/ArtifactDeploymentCommands.php b/ArtifactDeploymentCommands.php
index 698d99b..b50cd4f 100644
--- a/ArtifactDeploymentCommands.php
+++ b/ArtifactDeploymentCommands.php
@@ -325,6 +327,7 @@ final class ArtifactDeploymentCommands extends DrushCommands {
     $targetFinder->in($artifactDir)->ignoreDotFiles(FALSE);
     $this->localMachineHelper->getFilesystem()->remove($targetFinder);
     $this->localMachineHelper->getFilesystem()->mirror($this->dir, $artifactDir, $originFinder, ['override' => TRUE]);
+    $this->localMachineHelper->getFilesystem()->copy('./auth.json', $artifactDir . '/auth.json');
 
     $this->localMachineHelper->checkRequiredBinariesExist(['composer']);
     $outputCallback('out', 'Installing Composer production dependencies');

Remaining tasks

Find a good solution to include files which are otherwise excluded. Maybe something like --force-include 'auth.json'

User interface changes

none

API changes

Additional option to provide file paths or patterns to include.

Data model changes

none