sharpcompress/src/SharpCompress/Archives/IWritableArchiveExtensions.cs

using System;
using System.IO;
using SharpCompress.Writers;

namespace SharpCompress.Archives
{
    public static class IWritableArchiveExtensions
    {
        public static void AddEntry(
            this IWritableArchive writableArchive,
            string entryPath,
            string filePath
        )
        {
            var fileInfo = new FileInfo(filePath);
            if (!fileInfo.Exists)
            {
                throw new FileNotFoundException("Could not AddEntry: " + filePath);
            }
            writableArchive.AddEntry(
                entryPath,
                new FileInfo(filePath).OpenRead(),
                true,
                fileInfo.Length,
                fileInfo.LastWriteTime
            );
        }

        public static void SaveTo(
            this IWritableArchive writableArchive,
            string filePath,
            WriterOptions options
        )
        {
            writableArchive.SaveTo(new FileInfo(filePath), options);
        }

        public static void SaveTo(
            this IWritableArchive writableArchive,
            FileInfo fileInfo,
            WriterOptions options
        )
        {
            using (var stream = fileInfo.Open(FileMode.Create, FileAccess.Write))
            {
                writableArchive.SaveTo(stream, options);
            }
        }

        public static void AddAllFromDirectory(
            this IWritableArchive writableArchive,
            string filePath,
            string searchPattern = "*.*",
            SearchOption searchOption = SearchOption.AllDirectories
        )
        {
            using (writableArchive.PauseEntryRebuilding())
            {
                foreach (
                    var path in Directory.EnumerateFiles(filePath, searchPattern, searchOption)
                )
                {
                    var fileInfo = new FileInfo(path);
                    writableArchive.AddEntry(
                        path.Substring(filePath.Length),
                        fileInfo.OpenRead(),
                        true,
                        fileInfo.Length,
                        fileInfo.LastWriteTime
                    );
                }
            }
        }

        public static IArchiveEntry AddEntry(
            this IWritableArchive writableArchive,
            string key,
            FileInfo fileInfo
        )
        {
            if (!fileInfo.Exists)
            {
                throw new ArgumentException("FileInfo does not exist.");
            }
            return writableArchive.AddEntry(
                key,
                fileInfo.OpenRead(),
                true,
                fileInfo.Length,
                fileInfo.LastWriteTime
            );
        }
    }
}