Microsoft.DocAsCode.GlobUtility.ExpandFileMapping C# (CSharp) Method

        public static FileMapping ExpandFileMapping(string baseDirectory, FileMapping fileMapping)
        {
            if (fileMapping == null)
            {
                return null;
            }

            if (fileMapping.Expanded) return fileMapping;

            var expandedFileMapping = new FileMapping();
            foreach (var item in fileMapping.Items)
            {
                // Use local variable to avoid different items influencing each other
                var src = Path.Combine(baseDirectory, item.SourceFolder ?? string.Empty);
                var options = GetMatchOptionsFromItem(item);
                var files = FileGlob.GetFiles(src, item.Files, item.Exclude, options).ToArray();
                if (files.Length == 0)
                {
                    var currentSrcFullPath = string.IsNullOrEmpty(src) ? Directory.GetCurrentDirectory() : Path.GetFullPath(src);
                    Logger.LogInfo($"No files are found with glob pattern {TypeForwardedToStringExtension.ToDelimitedString(item.Files) ?? "<none>"}, excluding {TypeForwardedToStringExtension.ToDelimitedString(item.Exclude) ?? "<none>"}, under directory \"{currentSrcFullPath}\"");
                    CheckPatterns(item.Files);
                }
                expandedFileMapping.Add(
                    new FileMappingItem
                    {
                        SourceFolder = src,
                        Files = new FileItems(files),
                        DestinationFolder = item.DestinationFolder
                    });
            }

            expandedFileMapping.Expanded = true;
            return expandedFileMapping;
        }

        private static DocumentBuildParameters ConfigToParameter(BuildJsonConfig config)
        {
            var parameters    = new DocumentBuildParameters();
            var baseDirectory = config.BaseDirectory ?? Environment.CurrentDirectory;

            parameters.OutputBaseDir = Path.Combine(baseDirectory, "obj");
            if (config.GlobalMetadata != null)
            {
                parameters.Metadata = config.GlobalMetadata.ToImmutableDictionary();
            }
            if (config.FileMetadata != null)
            {
                parameters.FileMetadata = ConvertToFileMetadataItem(baseDirectory, config.FileMetadata);
            }
            parameters.ExternalReferencePackages = GetFilesFromFileMapping(GlobUtility.ExpandFileMapping(baseDirectory, config.ExternalReference)).ToImmutableArray();
            parameters.Files = GetFileCollectionFromFileMapping(baseDirectory,
                                                                Tuple.Create(DocumentType.Article, GlobUtility.ExpandFileMapping(baseDirectory, config.Content)),
                                                                Tuple.Create(DocumentType.Override, GlobUtility.ExpandFileMapping(baseDirectory, config.Overwrite)),
                                                                Tuple.Create(DocumentType.Resource, GlobUtility.ExpandFileMapping(baseDirectory, config.Resource)));
            return(parameters);
        }