Module: Teabag::Utility

Included in:
Coverage, Drivers::PhantomjsDriver, Instrumentation
Defined in:
lib/teabag/utility.rb

Instance Method Summary collapse

Instance Method Details

#which(cmd) ⇒ String?

Cross-platform way of finding an executable in the $PATH. stackoverflow.com/questions/2108727/which-in-ruby-checking-if-program-exists-in-path-from-ruby

Examples:

which('ruby') #=> /usr/bin/ruby

Parameters:

  • cmd (String) —

    the executable to find

Returns:

  • (String, nil) —

    the path to the executable



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# File 'lib/teabag/utility.rb', line 13

def which(cmd)
  exts = ENV['PATHEXT'] ? ENV['PATHEXT'].split(';') : ['']

  ENV['PATH'].split(File::PATH_SEPARATOR).each do |path|
    exts.each do |ext|
      exe = "#{ path }/#{ cmd }#{ ext }"
      return exe if File.executable?(exe)
    end
  end

  nil
end