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Using ruby-test with a Ruby project running on Vagrant or other VM

Warning: This is kind of an insecure setup.

On the VM, create a server that accepts and runs shell commands. For example, create this command (e.g., ~/bin/command_server):

#!/usr/bin/env ruby

require 'socket'
require 'open3'

port = ARGV[0] || 2000
puts "Starting server on port #{port}"
server = # Server bind to port 2000
loop do
  client = server.accept    # Wait for a client to connect
  cmd = client.gets
  client.puts "Running command: #{cmd}"

  Open3.popen3(cmd) do |stdin, stdout, stderr, wait_thr|
    while !stderr.eof? || !stdout.eof?
      client.print stderr.gets
      client.print stdout.gets

Start the server: ~/bin/command_server from your project's directory in the Vagrant VM.

In the ruby-test settings, wrap each test command in an echo '', and append | nc VM_ADDR 2000. Replace VM_ADDR with the IP address or hostname of the VM. nc (netcat) will forward the test commands to the server, which will then execute the commands.

For example:


echo 'bundle exec spring rspec {relative_path}' | nc 2000
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