Elixir implementation of tail -F.
Current usage:
{:ok, tail} = TailF.new("path/to/file")
line = TailF.get_line(tail)
# or if no data is available
nil = TailF.get_line(tail)
#... some time later, new lines are written to the file
recent_line = TailF.get_line(tail)Each instance of TailF keeps its own queue of lines, and
successive calls to TailF.get_line/1 respond with the
oldest line in the queue.
Currently does not handle the case where the file changes
out from underneath the descriptor. That is, it currently
implements tail -f but not tail -F.
TailF does handle partial lines (see test code).
The initial read can be limited to the last n lines by
using TailF.new("/path/to/file", n). The default is
n = 10. To read the whole file, use
TailF.new("/path/to/file", :all).