How to write to gzip file from elixir code

Question

I would like to write a gzip file from elixir code.

I tried to execute the following code, but it does not work.

io_device = File.open!("/path/to/file.gzip", [:write, :compressed])
IO.write(io_device, "test")

IO.writereturns :okbut /path/to/file.gzipempty.

How can I write to a gzip file?

Answer 1

You will need one more step: close the file to write any buffered data:

File.close io_device

Answer 2

You can also do the whole thing in one step:

File.write "/path/to/file.gzip", "test", [:compressed]