[Windows][Git Bash] ask never asks for user input

[gmichard]

Tasks

namespace :app do
  desc "Confirmation"
  task :confirmation do
    puts <<-WARN
    ========================================================================
      WARNING: You're about to deploy the branch...
               #{fetch(:branch)}
    ========================================================================
    Are you sure you want to continue? (y/N)
    WARN
    ask :value, "N"

    if fetch(:value) !~ /^y(es)?$/i
      puts "\nDeploy cancelled!"
      exit
    end
  end
end

Expected behavior

When using ask (offcial documentation), the console should wait for user input.

Actual behavior

On Git Bash (Windows), When using ask (offcial documentation) to get user input, the console never stops and automatically uses the default value.

System configuration

• Windows 10
• Terminal app: Git Bash

$ cap staging doctor

Environment
    Ruby     ruby 2.4.1p111 (2017-03-22 revision 58053) [x64-mingw32]
    Rubygems 3.0.6
    Bundler  N/A
    Command  D:/ProgramFiles/Ruby24-x64/bin/cap staging doctor

Gems
    capistrano                  3.11.2
    airbrussh                   1.4.0
    rake                        13.0.0          (update available)
    sshkit                      1.20.0
    net-ssh                     5.2.0
    capistrano-composer         0.0.6
    capistrano-file-permissions 1.0.0
    capistrano-symfony          2.0.0.pre.alfa2

[leehambley]

Thanks for the report.

What terminal emulator are you using? I'm extremely unfamiliar with Windows, but I believe options range from cmd.exe, PowerShell (multiple versions?) through Putty and various other things including some cygwin and emulated Linux environments via WSL(2)?

Thanks,

[gmichard]

@leehambley I'm not particullary familiar to Windows too...

Below, this is the use cases that I know, maybe it can enlighten you...

• ❌ The problem occurs when using the "BASH emulation provided by Git for Windows". I don't know what's behind it... Video

• ❌ Same problem, when using ConEmu with this "Startup configuration"

  -cur_console:fp -cur_console:d:D:\Sites\myproject set "PATH=%ProgramFiles%\Git\usr\bin;%PATH%" & "%ProgramFiles%\Git\git-cmd.exe" --no-cd --command=%ConEmuBaseDirShort%\conemu-msys2-64.exe /usr/bin/bash.exe -l -i
  

• ✔️ But it's OK, when using ConEmu with this "Startup configuration"

  "%ProgramFiles%\Git\git-cmd.exe" --no-cd --command=usr/bin/bash.exe -l -i -new_console:d:D:\Sites\myproject
  

[mattbrictson]

Seems like either stdin.tty? is returning false or there is an exception being raised and silently caught.

capistrano/lib/capistrano/configuration/question.rb

Lines 38 to 49 in 6e85c69

	def gets
	return unless stdin.tty?
	if echo?
	stdin.gets
	else
	stdin.noecho(&:gets).tap { $stdout.print "\n" }
	end
	rescue Errno::EIO
	# when stdio gets closed
	return
	end

My guess is that it is the tty? thing. Is this possibly the same issue: docker/for-win#1588 ?