47 lines
1.8 KiB
Ruby
47 lines
1.8 KiB
Ruby
module Puppet::Parser::Functions
|
|
newfunction(:validate_re, :doc => <<-'ENDHEREDOC') do |args|
|
|
Perform simple validation of a string against one or more regular
|
|
expressions. The first argument of this function should be a string to
|
|
test, and the second argument should be a stringified regular expression
|
|
(without the // delimiters) or an array of regular expressions. If none
|
|
of the regular expressions match the string passed in, compilation will
|
|
abort with a parse error.
|
|
|
|
If a third argument is specified, this will be the error message raised and
|
|
seen by the user.
|
|
|
|
The following strings will validate against the regular expressions:
|
|
|
|
validate_re('one', '^one$')
|
|
validate_re('one', [ '^one', '^two' ])
|
|
|
|
The following strings will fail to validate, causing compilation to abort:
|
|
|
|
validate_re('one', [ '^two', '^three' ])
|
|
|
|
A helpful error message can be returned like this:
|
|
|
|
validate_re($::puppetversion, '^2.7', 'The $puppetversion fact value does not match 2.7')
|
|
|
|
Note: Compilation will also abort, if the first argument is not a String. Always use
|
|
quotes to force stringification:
|
|
|
|
validate_re("${::operatingsystemmajrelease}", '^[57]$')
|
|
|
|
ENDHEREDOC
|
|
if (args.length < 2) or (args.length > 3) then
|
|
raise Puppet::ParseError, "validate_re(): wrong number of arguments (#{args.length}; must be 2 or 3)"
|
|
end
|
|
|
|
raise Puppet::ParseError, "validate_re(): input needs to be a String, not a #{args[0].class}" unless args[0].is_a? String
|
|
|
|
msg = args[2] || "validate_re(): #{args[0].inspect} does not match #{args[1].inspect}"
|
|
|
|
# We're using a flattened array here because we can't call String#any? in
|
|
# Ruby 1.9 like we can in Ruby 1.8
|
|
raise Puppet::ParseError, msg unless [args[1]].flatten.any? do |re_str|
|
|
args[0] =~ Regexp.compile(re_str)
|
|
end
|
|
|
|
end
|
|
end
|