Class: CLI::UI::Spinner::SpinGroup

Inherits:
Object
  • Object
show all
Defined in:
lib/cli/ui/spinner/spin_group.rb

Defined Under Namespace

Classes: Task

Instance Method Summary collapse

Constructor Details

#initialize(auto_debrief: true) ⇒ SpinGroup

Initializes a new spin group This lets you add Task objects to the group to multi-thread work

Options

  • :auto_debrief - Automatically debrief exceptions? Default to true

Example Usage

spin_group = CLI::UI::SpinGroup.new
spin_group.add('Title')   { || sleep 3.0 }
spin_group.add('Title 2') { || sleep 3.0; .update_title('New Title'); sleep 3.0 }
spin_group.wait

Output:



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# File 'lib/cli/ui/spinner/spin_group.rb', line 23

def initialize(auto_debrief: true)
  @m = Mutex.new
  @consumed_lines = 0
  @tasks = []
  @auto_debrief = auto_debrief
end

Instance Method Details

#add(title, &block) ⇒ Object

Add a new task

Attributes

  • title - Title of the task

  • block - Block for the task, will be provided with an instance of the spinner

Example Usage:

spin_group = CLI::UI::SpinGroup.new
spin_group.add('Title') { || sleep 1.0 }
spin_group.wait



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# File 'lib/cli/ui/spinner/spin_group.rb', line 167

def add(title, &block)
  @m.synchronize do
    @tasks << Task.new(title, &block)
  end
end

#debrief ⇒ Object

Debriefs failed tasks is auto_debrief is true



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# File 'lib/cli/ui/spinner/spin_group.rb', line 227

def debrief
  @m.synchronize do
    @tasks.each do |task|
      next if task.success

      e = task.exception
      out = task.stdout
      err = task.stderr

      CLI::UI::Frame.open('Task Failed: ' + task.title, color: :red) do
        if e
          puts "#{e.class}: #{e.message}"
          puts "\tfrom #{e.backtrace.join("\n\tfrom ")}"
        end

        CLI::UI::Frame.divider('STDOUT')
        out = "(empty)" if out.nil? || out.strip.empty?
        puts out

        CLI::UI::Frame.divider('STDERR')
        err = "(empty)" if err.nil? || err.strip.empty?
        puts err
      end
    end
    @tasks.all?(&:success)
  end
end

#wait ⇒ Object

Tells the group you’re done adding tasks and to wait for all of them to finish

Example Usage:

spin_group = CLI::UI::SpinGroup.new
spin_group.add('Title') { || sleep 1.0 }
spin_group.wait



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# File 'lib/cli/ui/spinner/spin_group.rb', line 180

def wait
  idx = 0

  loop do
    all_done = true

    width = CLI::UI::Terminal.width

    @m.synchronize do
      CLI::UI.raw do
        @tasks.each.with_index do |task, int_index|
          nat_index = int_index + 1
          task_done = task.check
          all_done = false unless task_done

          if nat_index > @consumed_lines
            print(task.render(idx, true, width: width) + "\n")
            @consumed_lines += 1
          else
            offset = @consumed_lines - int_index
            move_to   = CLI::UI::ANSI.cursor_up(offset) + "\r"
            move_from = "\r" + CLI::UI::ANSI.cursor_down(offset)

            print(move_to + task.render(idx, idx.zero?, width: width) + move_from)
          end
        end
      end
    end

    break if all_done

    idx = (idx + 1) % GLYPHS.size
    Spinner.index = idx
    sleep(PERIOD)
  end

  if @auto_debrief
    debrief
  else
    @m.synchronize do
      @tasks.all?(&:success)
    end
  end
end