The OS gem allows for some easy telling if you’re on windows or not. as well as some other helper utilities
Latest commit bb2a204 Jan 17, 2017 @rdp committed on GitHub Merge pull request #25 from Kerilk/master
Fix warnings


The OS gem allows for some easy telling if you're on windows or not.

  require 'os'

  => true   # or OS.doze?

  >> OS.bits
  => 32

  => true # if you're running in jruby.  Also OS.jruby?

  >> OS.ruby_bin
  => "c:\ruby18\bin\ruby.exe" # or "/usr/local/bin/ruby" or what not

  >> OS.posix?
  => false # true for linux, os x, cygwin

  >> OS.mac? # or OS.osx? or OS.x?
  => false

  >> OS.dev_null
  => "NUL" # or "/dev/null" depending on which platform

  >> OS.rss_bytes
  => 12300033 # number of rss bytes this process is using currently.  Basically "total in memory footprint" (doesn't include RAM used by the process that's in swap/page file)

  >> puts
  ==> # a yaml report of helpful values
  arch: x86_64-darwin10.6.0
  target_os: darwin10.6.0
  target_vendor: apple
  target_cpu: x86_64
  target: x86_64-apple-darwin10.6.0
  host_os: darwin10.6.0
  host_vendor: apple
  host_cpu: i386
  host: i386-apple-darwin10.6.0
  RUBY_PLATFORM: x86_64-darwin10.6.0

 >> OS.cpu_count  
 => 2 # number of cores, doesn't include hyper-threaded cores.

>> OS.open_file_command
=> "start" # or open on mac, or xdg-open on linux (all designed to open a file)

=> true # true for cygwin or MRI, whereas is false for cygwin

>> OS::Underlying.bsd?
=> true # true for OS X

If there are any other features you'd like, let me know, I'll do what I can to add them :) for feedback et al

Related projects:


The reason Gem::Platform.local felt wrong to me is that it treated cygwin as windows--which for most build environments, is wrong.  Hence the creation of this gem.

the facets gem (has a class similar to rubygems, above)

require 'facets/platform'

the “platform” gem, itself (a different gem)


License: MIT (see LICENSE file)