Add initial command, get values from build.yaml

build-config.php

@@ -1,8 +1,14 @@
 <?php
 
+use OliverDaviesLtd\BuildConfiguration\Console\Command\BuildConfigurationCommand;
 use Symfony\Component\Console\Application;
 
 require __DIR__ . '/vendor/autoload.php';
 
 $app = new Application();
+
+$app->addCommands([
+    new BuildConfigurationCommand(),
+]);
+
 $app->run();

composer.json

@@ -1,9 +1,16 @@
 {
     "require": {
         "twig/twig": "^3.5",
-        "symfony/console": "^6.2"
+        "symfony/console": "^6.2",
+        "symfony/yaml": "^6.2"
     },
     "require-dev": {
-        "humbug/box": "^4.2"
+        "humbug/box": "^4.2",
+        "symfony/var-dumper": "^6.2"
+    },
+    "autoload": {
+        "psr-4": {
+            "OliverDaviesLtd\\BuildConfiguration\\": "src/"
+        }
     }
 }

composer.lock

@@ -4,7 +4,7 @@
         "Read more about it at https://getcomposer.org/doc/01-basic-usage.md#installing-dependencies",
         "This file is @generated automatically"
     ],
-    "content-hash": "33bee317bc6e480792bb6770639a652b",
+    "content-hash": "10bdf6712c1d4ee4e01f212c41080a07",
     "packages": [
         {
             "name": "psr/container",
@@ -723,6 +723,80 @@
             ],
             "time": "2022-12-14T16:11:27+00:00"
         },
+        {
+            "name": "symfony/yaml",
+            "version": "v6.2.2",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/symfony/yaml.git",
+                "reference": "6ed8243aa5f2cb5a57009f826b5e7fb3c4200cf3"
+            },
+            "dist": {
+                "type": "zip",
+                "url": "https://api.github.com/repos/symfony/yaml/zipball/6ed8243aa5f2cb5a57009f826b5e7fb3c4200cf3",
+                "reference": "6ed8243aa5f2cb5a57009f826b5e7fb3c4200cf3",
+                "shasum": ""
+            },
+            "require": {
+                "php": ">=8.1",
+                "symfony/polyfill-ctype": "^1.8"
+            },
+            "conflict": {
+                "symfony/console": "<5.4"
+            },
+            "require-dev": {
+                "symfony/console": "^5.4|^6.0"
+            },
+            "suggest": {
+                "symfony/console": "For validating YAML files using the lint command"
+            },
+            "bin": [
+                "Resources/bin/yaml-lint"
+            ],
+            "type": "library",
+            "autoload": {
+                "psr-4": {
+                    "Symfony\\Component\\Yaml\\": ""
+                },
+                "exclude-from-classmap": [
+                    "/Tests/"
+                ]
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "MIT"
+            ],
+            "authors": [
+                {
+                    "name": "Fabien Potencier",
+                    "email": "fabien@symfony.com"
+                },
+                {
+                    "name": "Symfony Community",
+                    "homepage": "https://symfony.com/contributors"
+                }
+            ],
+            "description": "Loads and dumps YAML files",
+            "homepage": "https://symfony.com",
+            "support": {
+                "source": "https://github.com/symfony/yaml/tree/v6.2.2"
+            },
+            "funding": [
+                {
+                    "url": "https://symfony.com/sponsor",
+                    "type": "custom"
+                },
+                {
+                    "url": "https://github.com/fabpot",
+                    "type": "github"
+                },
+                {
+                    "url": "https://tidelift.com/funding/github/packagist/symfony/symfony",
+                    "type": "tidelift"
+                }
+            ],
+            "time": "2022-12-14T16:11:27+00:00"
+        },
         {
             "name": "twig/twig",
             "version": "v3.5.0",

src/Console/Command/BuildConfigurationCommand.php

@@ -0,0 +1,34 @@
+<?php
+
+declare(strict_types=1);
+
+namespace OliverDaviesLtd\BuildConfiguration\Console\Command;
+
+use Symfony\Component\Console\Attribute\AsCommand;
+use Symfony\Component\Console\Command\Command;
+use Symfony\Component\Console\Input\InputInterface;
+use Symfony\Component\Console\Output\OutputInterface;
+use Symfony\Component\Console\Style\SymfonyStyle;
+use Symfony\Component\Yaml\Yaml;
+
+#[AsCommand(
+    description: 'Build configuration files',
+    name: 'build-configuration'
+)]
+final class BuildConfigurationCommand extends Command
+{
+    public function execute(InputInterface $input, OutputInterface $output)
+    {
+        // Find a build.yaml file.
+        $buildYaml = Yaml::parseFile(getcwd().'/build.yaml');
+
+        $io = new SymfonyStyle($input, $output);
+        $io->info("Building configuration for {$buildYaml['name']}.");
+
+        // Parse its contents.
+        // Generate the appropriate configuration files.
+    //
+        return Command::SUCCESS;
+    }
+}
+