module Puppet::Parser::Functions newfunction(:validate_absolute_path, :doc => <<-'ENDHEREDOC') do |args| Validate the string represents an absolute path in the filesystem. This function works for windows and unix style paths. The following values will pass: $my_path = 'C:/Program Files (x86)/Puppet Labs/Puppet' validate_absolute_path($my_path) $my_path2 = '/var/lib/puppet' validate_absolute_path($my_path2) $my_path3 = ['C:/Program Files (x86)/Puppet Labs/Puppet','C:/Program Files/Puppet Labs/Puppet'] validate_absolute_path($my_path3) $my_path4 = ['/var/lib/puppet','/usr/share/puppet'] validate_absolute_path($my_path4) The following values will fail, causing compilation to abort: validate_absolute_path(true) validate_absolute_path('../var/lib/puppet') validate_absolute_path('var/lib/puppet') validate_absolute_path([ 'var/lib/puppet', '/var/foo' ]) validate_absolute_path([ '/var/lib/puppet', 'var/foo' ]) $undefined = undef validate_absolute_path($undefined) ENDHEREDOC require 'puppet/util' unless args.length > 0 then raise Puppet::ParseError, ("validate_absolute_path(): wrong number of arguments (#{args.length}; must be > 0)") end args.each do |arg| # put arg to candidate var to be able to replace it candidates = arg # if arg is just a string with a path to test, convert it to an array # to avoid test code duplication unless arg.is_a?(Array) then candidates = Array.new(1,arg) end # iterate over all pathes within the candidates array candidates.each do |path| # This logic was borrowed from # [lib/puppet/file_serving/base.rb](https://github.com/puppetlabs/puppet/blob/master/lib/puppet/file_serving/base.rb) # Puppet 2.7 and beyond will have Puppet::Util.absolute_path? Fall back to a back-ported implementation otherwise. if Puppet::Util.respond_to?(:absolute_path?) then unless Puppet::Util.absolute_path?(path, :posix) or Puppet::Util.absolute_path?(path, :windows) raise Puppet::ParseError, ("#{path.inspect} is not an absolute path.") end else # This code back-ported from 2.7.x's lib/puppet/util.rb Puppet::Util.absolute_path? # Determine in a platform-specific way whether a path is absolute. This # defaults to the local platform if none is specified. # Escape once for the string literal, and once for the regex. slash = '[\\\\/]' name = '[^\\\\/]+' regexes = { :windows => %r!^(([A-Z]:#{slash})|(#{slash}#{slash}#{name}#{slash}#{name})|(#{slash}#{slash}\?#{slash}#{name}))!i, :posix => %r!^/!, } rval = (!!(path =~ regexes[:posix])) || (!!(path =~ regexes[:windows])) rval or raise Puppet::ParseError, ("#{path.inspect} is not an absolute path.") end end end end end