Module: RSpec::Bash::Open3

Defined in:
lib/rspec/bash/open3.rb

Class Method Summary collapse

Class Method Details

.popen3X(cmd, read_fd: 62, write_fd: 63, &block) ⇒ Object

an extended version of Open3.popen3 which exposes two pipes for internal communication between the spawned process and ruby

the descriptors are available as 62 (child read) and 63 (child write)

Parameters:

  • cmd (Array<String>) 


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# File 'lib/rspec/bash/open3.rb', line 12

def self.popen3X(cmd, read_fd: 62, write_fd: 63, &block)
  in_r, in_w = IO.pipe
  out_r, out_w = IO.pipe
  err_r, err_w = IO.pipe
  b2r_r, b2r_w = IO.pipe
  r2b_r, r2b_w = IO.pipe

  opts = {}
  opts[:in] = in_r
  opts[:out] = out_w
  opts[:err] = err_w
  opts[read_fd] = r2b_r
  opts[write_fd] = b2r_w

  env = {
    "BASHIT_R_FD" => "#{read_fd}",
    "BASHIT_W_FD" => "#{write_fd}"
  }

  ::Open3.send(:popen_run,
    [env] + cmd,
    opts,
    [in_r, out_w, err_w, r2b_r, b2r_w], # child_io
    [in_w, out_r, err_r, r2b_w, b2r_r], # parent_io
    &block
  )
end