module Asciidoctor::Diagram::Which

Public Class Methods

which(cmd, options = {}) click to toggle source

@private

# File lib/asciidoctor-diagram/util/which.rb, line 5
def self.which(cmd, options = {})
  exts = ENV['PATHEXT'] ? ENV['PATHEXT'].split(';') : ['']

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

  nil
end