Contents

# encoding: utf-8

# Copyright (c) 2015, Tomas Korcak <[e-mail]>
#
# Permission is hereby granted, free of charge, to any person obtaining a copy
# of this software and associated documentation files (the "Software"), to deal
# in the Software without restriction, including without limitation the rights
# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
# copies of the Software, and to permit persons to whom the Software is
# furnished to do so, subject to the following conditions:
#
# The above copyright notice and this permission notice shall be included in
# all copies or substantial portions of the Software.
#
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL THE
# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
# THE SOFTWARE.

module Jetel
  module Helper
    class << self
      # Cross-platform way of finding an executable in the $PATH.
      #
      #   which('ruby') #=> /usr/bin/ruby
      def which(cmd)
        exts = ENV['PATHEXT'] ? ENV['PATHEXT'].split(';') : ['']
        ENV['PATH'].split(File::PATH_SEPARATOR).each do |path|
          exts.each { |ext|
            exe = File.join(path, "#{cmd}#{ext}")
            return exe if File.executable?(exe) && !File.directory?(exe)
          }
        end
        return nil
      end
    end
  end
end

Version data entries

3 entries across 3 versions & 1 rubygems

Version	Path
jetel-0.0.18	lib/jetel/helpers/os_helper.rb
jetel-0.0.17	lib/jetel/helpers/os_helper.rb
jetel-0.0.16	lib/jetel/helpers/os_helper.rb