/// <summary>
/// Loads and returns all Drupal configuration files from the calling directory (<paramref name="directory"/>).
/// </summary>
/// <param name="directory">The directory.</param>
/// <param name="nodeValid">Predicate function for determining which configuration nodes will be included in the
/// loaded files (if <paramref name="nodeValid"/> returns <c>true</c>), and which will be ignored. Note that this
/// function will be used <strong>only for root config nodes</strong> in all the files.</param>
/// <param name="recursively">Determines if subdirectories of <paramref name="directory"/> should also be searched
/// for config files or not.</param>
/// <returns>Enumeration of <see cref="ConfigurationFile"/> instances, each representing one Drupal configuration
/// file from <paramref name="directory"/>.</returns>
internal static IEnumerable <ConfigurationFile> GetConfigurationFiles([NotNull] this DirectoryInfo directory,
Predicate <IConfigNode> nodeValid = null, bool recursively = true)
{
IEnumerable <ConfigurationFile> localFiles = directory.GetFiles("*.yml").Select(f =>
ConfigurationFile.TryLoadFromFile(f, out ConfigurationFile configFile, nodeValid)
? configFile
: null).Where(cf => cf != null);
if (recursively)
{
localFiles = localFiles.Union(directory.GetDirectories()
.Where(d => !ForbiddenDirectories.Contains(d.Name))
// ReSharper disable once RedundantArgumentDefaultValue
.SelectMany(d => GetConfigurationFiles(d, nodeValid, true)));
}
return(localFiles);
}
