Added COMPOSER env var support for ct php:composer

Author: mblaschke

src/app/CliTools/Console/Command/Php/ComposerCommand.php

@@ -51,21 +51,27 @@ public function execute(InputInterface $input, OutputInterface $output)
     {
         $paramList = $this->getFullParameterList();
 
+        // Get composer.json from env variable
+        $composerJson = getenv('COMPOSER');
+        if (empty($composerJson)) {
+            $composerJson = 'composer.json';
+        }
+
         if ($this->checkIfComposerJsonIsNeeded($paramList)) {
-            $composerJsonPath = UnixUtility::findFileInDirectortyTree('composer.json');
+            $composerJsonPath = UnixUtility::findFileInDirectortyTree($composerJson);
 
             if (!empty($composerJsonPath)) {
                 // composer.json found
 
                 $path = dirname($composerJsonPath);
-                $this->output->writeln('<comment>Found composer.json directory: ' . $path . '</comment>');
+                $this->output->writeln('<comment>Found ' . $composerJson . ' directory: ' . $path . '</comment>');
                 // Switch to directory of docker-compose.yml
                 PhpUtility::chdir($path);
 
                 return $this->runComposer($paramList);
             } else {
                 // no composer.json found but try to run the command anyway
-                $this->output->writeln('<warning>No composer.json found in tree</warning>');
+                $this->output->writeln('<warning>No ' . $composerJson . ' found in tree</warning>');
                 return $this->runComposer($paramList);
             }
         } else {