Jira (FACT-2937) Puppet facts show logs error when stdlib is installed

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Gheorghe Popescu (Jira)

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Feb 4, 2021, 8:52:04 AM2/4/21

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Gheorghe Popescu updated an issue

Facter /

FACT-2937

Puppet facts show logs error when stdlib is installed

Change By:	Gheorghe Popescu

When running `puppet facts show` and puppetlabs-stdlib is installed, the following error message is shown:

{noformat}
Error: Could not autoload puppet/provider/service/init: undefined method `downcase' for nil:NilClass
Error: Could not autoload puppet/provider/service/bsd: Could not autoload puppet/provider/service/init: undefined method `downcase' for nil:NilClass
Error: Facter: error while resolving custom facts in /etc/puppetlabs/code/modules/stdlib/lib/facter/service_provider.rb Could not autoload puppet/provider/service/bsd: Could not autoload puppet/provider/service/init: undefined method `downcase' for nil:NilClass
{noformat}

- puppet facts show calls `Facter.resolve` which sets show_legacy to fals false
- when resolving facts, Facter also load modules facts(stdlib)
- stdlib has a fact that creates a dummy provider: https://github.com/puppetlabs/puppetlabs-stdlib/blob/main/lib/facter/service_provider.rb
- when Facter loads that fact, it calls Puppet to initalize the provider, Puppet tries to see what specific provider is suitable, and when it gets to `init.rb` it calls Facter back, with `operatingsystem`
- because `Facter::Options[:show_legacy]` is false, Facter.value(:operatingsystem) returns `nil`, which breaks the call of `downcase`: https://github.com/puppetlabs/puppet/blob/main/lib/puppet/provider/service/init.rb#L24

This happens because `Facter::Options` is globally set for the entire run.

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