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A puppet-lint plugin to check for parameters assigned to the empty string. There exists also puppet-lint-empty_string-check which does the same, but for all variables within a class.

$ gem install puppet-lint-params_empty_string-check

gem 'puppet-lint-params_empty_string-check', require: false

According the the Vox Pupuli best practices, a class parameter with the string datatype should default to undef and not '', if it's optional. The recommendations are documented at voxpupuli.org.

class foo (
 String $bar = '',
 String[0] $foo = '',
 Variant[String[0], Integer] $baz = '',
) {
 # logic
}

All three of the above variantions aren't recommended.

class foo (
 Optional[String[1]] $bar = undef,
 Optional[String[1]] $foo = undef,
 Optional[String[1]] $baz = undef,
) {
 # logic
}

There are situations where undef doesn't make sense or you don't want a minimal string length of 1. Because of that, this module doesn't implement a autofix method.

To disable this check, you can add --no-empty_string_assignment-check to your puppet-lint command line.

$ puppet-lint --no-empty_string_assignment-check path/to/file.pp

Alternatively, if you’re calling puppet-lint via the Rake task, you should insert the following line to your Rakefile.

PuppetLint.configuration.send('disable_empty_string_assignment')

You can also disable it inline:

class foo (
 String $baz = '', # lint:ignore:params_empty_string_assignment
) {
 # awesome logic here
}

This plugin was originally authored by Tim 'bastelfreak' Meusel. The maintainer preferred that Vox Pupuli take ownership of the module for future improvement and maintenance.

This gem is licensed under the AGPL-3 license.

To make a new release, please do:

• update the version in the gemspec file
• Install gems with bundle install --with release --path .vendor
• generate the changelog with bundle exec rake changelog
• Check if the new version matches the closed issues/PRs in the changelog
• Create a PR with it
• After it got merged, push a tag. GitHub actions will do the actual release to rubygems and GitHub Packages