class Which
Wraps the `which` Unix utility
Public Class Methods
which(cmd)
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# File lib/which.rb, line 5 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