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# This module provides a method that exposes parameter information for a given host.
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# The hash is extensible, so any plugin/module can add a provider that will add its
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# information to the method.
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# Usage:
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# host = Host::Managed.find(my_host_id)
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# host.info
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# => A hash of hashes that describes all parameters associated with the host.
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#
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# Writing an extension:
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# Inherit HostInfo::Provider and override #host_info method and register the
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# provider by calling HostInfo.register_info_provider
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module HostInfoExtensions
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extend ActiveSupport::Concern
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included do
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# Add default providers
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HostInfo.register_info_provider(HostInfoProviders::StaticInfo)
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HostInfo.register_info_provider(HostInfoProviders::ConfigGroupsInfo)
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HostInfo.register_info_provider(HostInfoProviders::PuppetInfo)
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HostInfo.register_info_provider(HostInfoProviders::HostParamsInfo)
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end
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# This is the base method that gathers information from all providers.
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def info
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info_hash = {}
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HostInfo.providers.each do |provider_class|
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provider = provider_class.new(self)
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info = provider.host_info
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info_hash.deep_merge! info if info
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end
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info_hash
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end
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end
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