#2 Locally cache default config files

src/CommandProvider.php

+<?php
+
+namespace LakeDrops\DrupalConfig;
+
+use Composer\Plugin\Capability\CommandProvider as CommandProviderCapability;
+
+/**
+ * Composer Command Provider for LakeDrops drupal configurations.
+ *
+ * @package LakeDrops\DrupalConfig
+ */
+class CommandProvider implements CommandProviderCapability {
+
+  /**
+   * Retrieves an array of commands.
+   *
+   * @return \Composer\Command\BaseCommand[]
+   *   Array of available commands.
+   */
+  public function getCommands(): array {
+    return [
+      new FlushCacheCommand(),
+    ];
+  }
+
+}

src/FlushCacheCommand.php

+<?php
+
+namespace LakeDrops\DrupalConfig;
+
+use Composer\Command\BaseCommand;
+use Symfony\Component\Console\Input\InputInterface;
+use Symfony\Component\Console\Output\OutputInterface;
+
+/**
+ * Flush Cache Command for LakeDrops Drupal configurations.
+ *
+ * @package LakeDrops\DrupalConfig
+ */
+class FlushCacheCommand extends BaseCommand {
+
+  /**
+   * {@inheritdoc}
+   */
+  protected function configure(): void {
+    parent::configure();
+    $this
+      ->setName('lakedrops:configuration:flush_cache')
+      ->setDescription('Flush configuration cache.');
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  protected function execute(InputInterface $input, OutputInterface $output): int {
+    $count = 0;
+    foreach (glob(Plugin::getCacheDir($this->requireComposer()) . '*') as $file) {
+      if (is_file($file)) {
+        unlink($file);
+        $count++;
+      }
+    }
+    $output->writeln('Deleted ' . $count . ' file(s).');
+    return 0;
+  }
+
+}

src/Plugin.php

@@ -19,6 +19,23 @@ class Plugin implements PluginInterface {
    */
   private Installer $installer;
 
+  /**
+   * Determines and prepares the cache directory.
+   *
+   * @param \Composer\Composer $composer
+   *   The composer instance.
+   *
+   * @return string
+   *   The cache directory.
+   */
+  public static function getCacheDir(Composer $composer): string {
+    $cacheDir = $composer->getConfig()->get('cache-dir') . '/lakedrops-drupal-config/';
+    if (!file_exists($cacheDir)) {
+      mkdir($cacheDir);
+    }
+    return $cacheDir;
+  }
+
   /**
    * {@inheritdoc}
    */
@@ -29,12 +46,12 @@ class Plugin implements PluginInterface {
 
     if ($extra['lakedrops-default'] ?? FALSE) {
       $default = [
-        'lakedrops-config-file' => 'https://gitlab.lakedrops.com/composer/plugin/drupal-environment/-/raw/main/defaults/config.json',
-        'lakedrops-curated-file' => 'https://gitlab.lakedrops.com/composer/plugin/drupal-environment/-/raw/main/defaults/curated.json',
-        'lakedrops-extra-drupal-scaffold-file' => 'https://gitlab.lakedrops.com/composer/plugin/drupal-environment/-/raw/main/defaults/drupal-scaffold.json',
-        'lakedrops-extra-drupal-libraries-file' => 'https://gitlab.lakedrops.com/composer/plugin/drupal-environment/-/raw/main/defaults/drupal-libraries.json',
-        'lakedrops-extra-installer-types-file' => 'https://gitlab.lakedrops.com/composer/plugin/drupal-environment/-/raw/main/defaults/installer-types.json',
-        'lakedrops-extra-installer-paths-file' => 'https://gitlab.lakedrops.com/composer/plugin/drupal-environment/-/raw/main/defaults/installer-paths.json',
+        'lakedrops-config-file' => 'https://gitlab.lakedrops.com/composer/drupal-default-config/-/raw/main/config.json',
+        'lakedrops-curated-file' => 'https://gitlab.lakedrops.com/composer/drupal-default-config/-/raw/main/curated.json',
+        'lakedrops-extra-drupal-scaffold-file' => 'https://gitlab.lakedrops.com/composer/drupal-default-config/-/raw/main/drupal-scaffold.json',
+        'lakedrops-extra-drupal-libraries-file' => 'https://gitlab.lakedrops.com/composer/drupal-default-config/-/raw/main/drupal-libraries.json',
+        'lakedrops-extra-installer-types-file' => 'https://gitlab.lakedrops.com/composer/drupal-default-config/-/raw/main/installer-types.json',
+        'lakedrops-extra-installer-paths-file' => 'https://gitlab.lakedrops.com/composer/drupal-default-config/-/raw/main/installer-paths.json',
       ];
       foreach ($default as $key => $value) {
         if (!isset($extra[$key])) {
@@ -44,7 +61,7 @@ class Plugin implements PluginInterface {
     }
     if (isset($extra['lakedrops-config-file']) || isset($extra['lakedrops-curated-file'])) {
       if (isset($extra['lakedrops-config-file'])) {
-        foreach ($this->readJson('config', $extra['lakedrops-config-file'], $io) as $key => $value) {
+        foreach ($this->readJson('config', $extra['lakedrops-config-file'], $io, $composer) as $key => $value) {
           if ($key === 'allow-plugins') {
             foreach ($extra['lakedrops-allow-plugins'] ?? [] as $pluginKey => $pluginValue) {
               $value[$pluginKey] = $pluginValue;
@@ -57,7 +74,7 @@ class Plugin implements PluginInterface {
       }
       if (isset($extra['lakedrops-curated-file'])) {
         $audit = $composer->getConfig()->get('audit');
-        $audit['ignore'] = $this->readJson('audit ignore', $extra['lakedrops-curated-file'], $io);
+        $audit['ignore'] = $this->readJson('audit ignore', $extra['lakedrops-curated-file'], $io, $composer);
         $composer->getConfig()
           ->getConfigSource()
           ->addConfigSetting('audit', $audit);
@@ -83,7 +100,7 @@ class Plugin implements PluginInterface {
             $extra[$item][$path] = ['type:drupal-' . $type];
           }
         }
-        $extra[$item] = array_merge($extra[$item], $this->readJson($item, $extra[$key], $io));
+        $extra[$item] = array_merge($extra[$item], $this->readJson($item, $extra[$key], $io, $composer));
         $changed = TRUE;
       }
     }
@@ -114,16 +131,26 @@ class Plugin implements PluginInterface {
    *   The filename from where to read the data.
    * @param \Composer\IO\IOInterface $io
    *   The io service for messages.
+   * @param \Composer\Composer $composer
+   *   The composer instance.
    *
    * @return array
    *   The read data.
    *
    * @throws \Exception
    */
-  protected function readJson(string $type, string $filename, IOInterface $io): array {
-    $io->write('<info>Gathering ' . $type . ' from ' . $filename . '.</info>');
+  protected function readJson(string $type, string $filename, IOInterface $io, Composer $composer): array {
     try {
-      $data = json_decode(file_get_contents($filename), TRUE, 512, JSON_THROW_ON_ERROR);
+      $cache_file = self::getCacheDir($composer) . md5($filename);
+      if (!file_exists($cache_file) || (filemtime($cache_file) + 86400 < time())) {
+        $io->write('<info>Gathering fresh ' . $type . ' from ' . $filename . '.</info>');
+        $content = file_get_contents($filename);
+        file_put_contents($cache_file, $content);
+      }
+      else {
+        $content = file_get_contents($cache_file);
+      }
+      $data = json_decode($content, TRUE, 512, JSON_THROW_ON_ERROR);
       $error = json_last_error();
     }
     catch (\JsonException) {