Created
May 11, 2012 04:24
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get password - Ruby - any platform - no gems needed
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| # --- Platform inspectors | |
| def jruby? ; RUBY_PLATFORM =~ /java/i end | |
| def windows? ; RUBY_PLATFORM =~ /win(32|dows|ce)|djgpp|(ms|cyg|bcc)win|mingw32/i end | |
| def unix? ; !jruby? && !windows? end | |
| # --- Lé code | |
| def ask_for_password_on_unix(prompt = "Enter password: ") | |
| raise 'Could not ask for password because there is no interactive terminal (tty)' unless $stdin.tty? | |
| $stdout.print prompt unless prompt.nil? | |
| $stdout.flush | |
| raise 'Could not disable echo to ask for password securely' unless system 'stty -echo' | |
| password = $stdin.gets | |
| password.chomp! if password | |
| password | |
| ensure | |
| raise 'Could not re-enable echo while asking for password' unless system 'stty echo' | |
| end | |
| def ask_for_password_on_windows(prompt = "Enter password: ") | |
| raise 'Could not ask for password because there is no interactive terminal (tty)' unless $stdin.tty? | |
| require 'Win32API' | |
| char = nil | |
| password = '' | |
| $stdout.print prompt unless prompt.nil? | |
| $stdout.flush | |
| while char = Win32API.new("crtdll", "_getch", [ ], "L").Call do | |
| break if char == 10 || char == 13 # return or newline | |
| if char == 127 || char == 8 # backspace and delete | |
| password.slice!(-1, 1) | |
| else | |
| password << char.chr | |
| end | |
| end | |
| puts | |
| password | |
| end | |
| def ask_for_password_on_jruby(prompt = "Enter password: ") | |
| raise 'Could not ask for password because there is no interactive terminal (tty)' unless $stdin.tty? | |
| require 'java' | |
| include_class 'java.lang.System' | |
| include_class 'java.io.Console' | |
| $stdout.print prompt unless prompt.nil? | |
| $stdout.flush | |
| java.lang.String.new(System.console().readPassword(prompt)); | |
| end | |
| def ask_for_password(prompt = "Enter password: ") | |
| %w|windows unix jruby|.each do |platform| | |
| eval "return ask_for_password_on_#{platform}(prompt) if #{platform}?" | |
| end | |
| raise "Could not read password on unknown Ruby platform: #{RUBY_DESCRIPTION}" | |
| end |
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Fixed the jruby code and generally cleaned it up a bit: https://gist.github.com/2040373