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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)
The following values will fail, causing compilation to abort:
validate_absolute_path(true)
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|
# 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?(arg, :posix) or Puppet::Util.absolute_path?(arg, :windows)
raise Puppet::ParseError, ("#{arg.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 = (!!(arg =~ regexes[:posix])) || (!!(arg =~ regexes[:windows]))
rval or raise Puppet::ParseError, ("#{arg.inspect} is not an absolute path.")
end
end
end
end
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