Add CLI argument for tag or branch to override setting

src/Command/DeployCommand.php

@@ -45,6 +45,7 @@ protected function configure()
             ->setDescription('Deploys a Symfony application to one or more remote servers.')
             ->setHelp('...')
             ->addArgument('stage', InputArgument::OPTIONAL, 'The stage to deploy to ("production", "staging", etc.)', 'prod')
+            ->addArgument('branch-or-tag', InputArgument::OPTIONAL, 'Branch or tag you would like checked out')
             ->addOption('configuration', 'c', InputOption::VALUE_REQUIRED, 'Load configuration from the given file path')
             ->addOption('dry-run', null, InputOption::VALUE_NONE, 'Shows the commands to perform the deployment without actually executing them')
         ;

src/Configuration/DefaultConfiguration.php

@@ -33,6 +33,7 @@ final class DefaultConfiguration extends AbstractConfiguration
     private $keepReleases = 5;
     private $repositoryUrl;
     private $repositoryBranch = 'master';
+    private $passedBranchOrTag = false;
     private $remotePhpBinaryPath = 'php';
     private $updateRemoteComposerBinary = false;
     private $remoteComposerBinaryPath = '/usr/local/bin/composer';
@@ -61,11 +62,15 @@ final class DefaultConfiguration extends AbstractConfiguration
     private $sharedDirs = [];
     private $resetOpCacheFor;
 
-    public function __construct(string $localProjectDir)
+    public function __construct(string $localProjectDir, ?string $branchOrTag)
     {
         parent::__construct();
         $this->localProjectDir = $localProjectDir;
         $this->setDefaultConfiguration(Kernel::MAJOR_VERSION, Kernel::MINOR_VERSION);
+        if (!empty($branchOrTag)) {
+            $this->repositoryBranch = $branchOrTag;
+            $this->passedBranchOrTag = true;
+        }
     }
 
     // this proxy method is needed because the autocompletion breaks
@@ -122,7 +127,9 @@ public function repositoryUrl(string $url): self
 
     public function repositoryBranch(string $branchName): self
     {
-        $this->repositoryBranch = $branchName;
+        if ($this->passedBranchOrTag === false) {
+            $this->repositoryBranch = $branchName;
+        }
 
         return $this;
     }

src/Deployer/AbstractDeployer.php

@@ -35,6 +35,8 @@ abstract class AbstractDeployer
     /** @var ConfigurationAdapter */
     private $config;
 
+    protected $branchOrTag;
+
     abstract public function getRequirements(): array;
 
     abstract public function deploy();
@@ -132,6 +134,7 @@ public function beforeFinishingRollback()
     public function initialize(Context $context): void
     {
         $this->context = $context;
+        $this->branchOrTag = $context->getInput()->getArgument('branch-or-tag');
         $this->logger = new Logger($context);
         $this->taskRunner = new TaskRunner($this->context->isDryRun(), $this->logger);
         $this->log('<h1>Initializing configuration</>');
@@ -141,6 +144,7 @@ public function initialize(Context $context): void
         $this->log($this->config);
         $this->log('<h2>Checking technical requirements</>');
         $this->checkRequirements();
+
     }
 
     abstract protected function getConfigBuilder();
@@ -169,6 +173,11 @@ final protected function runLocal(string $command): TaskCompleted
         return $this->taskRunner->run($task)[0];
     }
 
+    final protected function getBranchOrTag(): ?string
+    {
+        return $this->branchOrTag;
+    }
+
     /**
      * @return TaskCompleted[]
      */
@@ -231,4 +240,5 @@ private function checkRequirements(): void
             $this->log($requirement->getMessage());
         }
     }
+
 }

src/Deployer/DefaultDeployer.php

@@ -27,7 +27,7 @@ abstract class DefaultDeployer extends AbstractDeployer
 
     public function getConfigBuilder(): DefaultConfiguration
     {
-        return new DefaultConfiguration($this->getContext()->getLocalProjectRootDir());
+        return new DefaultConfiguration($this->getContext()->getLocalProjectRootDir(), $this->getBranchOrTag());
     }
 
     public function getRequirements(): array
@@ -245,6 +245,11 @@ private function doGetcodeRevision(): string
         $this->log('<h2>Getting the revision ID of the code repository</>');
         $result = $this->runLocal(sprintf('git ls-remote %s %s', $this->getConfig(Option::repositoryUrl), $this->getConfig(Option::repositoryBranch)));
         $revision = explode("\t", $result->getTrimmedOutput())[0];
+
+        if (empty($revision)) {
+            throw new InvalidConfigurationException(sprintf("No revisions found for %s", $this->getConfig(Option::repositoryBranch)));
+        }
+
         if ($this->getContext()->isDryRun()) {
             $revision = '(the code revision)';
         }