require "fileutils"

module Archive
    def self.cmd(*cmd)
        puts "cmd: #{cmd.join(" ")}"
        # return 
        stdout, stderr, status = Open3.capture3(*cmd)
        unless status.success?
            warn "Command failed: #{cmd.join(' ')}"
            warn stderr
            exit status.exitstatus || 1
        end
        stdout
    end

    # it preserved sparsiveness 
    #     gtar -S --sparse-version=2 -I 'zstd -T0 -19' -cpf test.tar.zst /Volumes/Projs/VM/VM-data/image/debian-arm64/debian/
    #     tar --zstd -xpf test.tar.zst -C ./r

    def self.create(path, **options)
        out = options[:out] || File.join(Dir.pwd, "archive.tar.zst")
        
        FileUtils.mkdir_p(File.dirname(out))
        cmd "gtar", "-S", "--sparse-version=2", "-I",
            "zstd -T0 -19", "-cpf", out, "-C" , path, "."
    end

    def self.restore(file, path, **options)
        puts file
        puts path
        puts options

        FileUtils.mkdir_p(path)
        cmd "gtar", "-S", "--sparse-version=2", "-I", "zstd", "-xpf",
            file, "-C", path
    end
end