Module: IOSIconGenerator::Library

Defined in:
lib/ios_icon_generator/helpers/which.rb

Class Method Summary collapse

Class Method Details

.which(cmd) ⇒ Object

Cross-platform way of finding an executable in the $PATH.

From stackoverflow.com/questions/2108727/which-in-ruby-checking-if-program-exists-in-path-from-ruby

Parameters:

cmd

The name of the command to search the path for.

Returns:

The full path to the command if found, and nil otherwise.



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# File 'lib/ios_icon_generator/helpers/which.rb', line 30

def self.which(cmd)
  exts = ENV['PATHEXT'] ? ENV['PATHEXT'].split(';') : ['']
  ENV['PATH'].split(File::PATH_SEPARATOR).each do |path|
    exts.each do |ext|
      exe = File.join(path, "#{cmd}#{ext}")
      return exe if File.executable?(exe) && !File.directory?(exe)
    end
  end
  nil
end