Class: ConcurrentPipeline::Shell

Inherits:
Object
  • Object
show all
Defined in:
lib/concurrent_pipeline/shell.rb

Defined Under Namespace

Classes: Result

Constant Summary collapse

Error = 
Class.new(StandardError)

Class Method Summary collapse

Class Method Details

.run(command) ⇒ Object 



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# File 'lib/concurrent_pipeline/shell.rb', line 22

def run(command)
  Open3.popen3(command) do |_in, stdout, stderr, wait_thr|
    process_stdout = []
    stdout_thr = Thread.new do
      while line = stdout.gets&.chomp
        yield(:stdout, line) if block_given?
        process_stdout << line
      end
    end

    process_stderr = []
    stderr_thr = Thread.new do
      while line = stderr.gets&.chomp
        yield(:stderr, line) if block_given?
        process_stderr << line
      end
    end

    [
      stderr_thr,
      stdout_thr,
    ].each(&:join)

    Result.new(
      command: command,
      success: wait_thr.value.success?,
      stdout: process_stdout.join("\n"),
      stderr: process_stderr.join("\n"),
    )
  end
end

.run! ⇒ Object 



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# File 'lib/concurrent_pipeline/shell.rb', line 15

def run!(...)
  # only returns stdout just because.
  run(...)
    .tap { raise "command failed: \n#{_1.inspect}" unless _1.success? }
    .stdout
end