TarOpen

This is a port from :erl_tar.

It solves the problem of writting to a Tar file in memory, as asked in https://elixirforum.com/t/in-memory-tar-file/47470/.

Ported to Elixir with the help of fabulous https://github.com/marianoguerra/efe

Tar is a a patched port of the whole :erl_tar module. TarOpen is a patched version of it offering only TarOpen.open/2 as an alternative to :erl_tar.open/2 to be able to write to file loaded in RAM. Use this module if you just want to write to a tar file in memory.

Usage

# Using TarOpen
{:ok, fd1} = File.open("", [:read, :write, :ram])
{:ok, tar_desc1} = TarOpen.open({:file, fd1}, [:write])
:erl_tar.add(tar_desc1, "xxx", 'README.md', [])
{ok, contents1} = :file.pread(fd1, 0, 8192)
File.write("foo1.tar", contents1) 

# Using Tar
{:ok, fd2} = File.open("", [:read, :write, :ram])
{:ok, tar_desc2} = Tar.open({:file, fd2}, [:write])
Tar.add(tar_desc2, "xxx", 'README.md', [])
{ok, contents2} = :file.pread(fd2, 0, 8192)
File.write("foo2.tar", contents2) 

Installation

If available in Hex, the package can be installed by adding tar_open to your list of dependencies in mix.exs:

def deps do
  [
    {:tar_open, "~> 0.1.0"}
  ]
end

Documentation can be generated with ExDoc and published on HexDocs. Once published, the docs can be found at https://hexdocs.pm/tar_open.