Class: Which

Inherits:
Object
  • Object
show all
Defined in:
lib/quality/which.rb

Instance Method Summary collapse

Instance Method Details

#which(cmd) ⇒ Object

stackoverflow.com/questions/2108727/

which-in-ruby-checking-if-program-exists-in-path-from-ruby



4
5
6
7
8
9
10
11
12
13
 
# File 'lib/quality/which.rb', line 4

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