Class: Loom::Facts::FactSet
- Inherits:
-
Object
- Object
- Loom::Facts::FactSet
- Defined in:
- lib/loom/facts/fact_set.rb
Overview
A factset is created by running each registered Loom::Facts::Provider and calling Provider+collect_facts+. See ./fact_file_provider.rb and lib/loomext/facts/facter_provider.rb for examples of fact providers.
Constant Summary collapse
- InvalidFactName =
Class.new Loom::LoomError
- InvalidFactValue =
Class.new Loom::LoomError
- UnmarshalableError =
Class.new Loom::LoomError
Instance Attribute Summary collapse
-
#host_spec ⇒ Object
readonly
Returns the value of attribute host_spec.
Class Method Summary collapse
Instance Method Summary collapse
- #facts ⇒ Object
- #get(fact_name) ⇒ Object (also: #[])
- #hostname ⇒ Object
-
#initialize(host_spec, fact_map) ⇒ FactSet
constructor
A new instance of FactSet.
- #merge(facts) ⇒ Object
- #sshname ⇒ Object
- #to_s ⇒ Object
Constructor Details
#initialize(host_spec, fact_map) ⇒ FactSet
Returns a new instance of FactSet.
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# File 'lib/loom/facts/fact_set.rb', line 62 def initialize(host_spec, fact_map) raise unless fact_map.is_a? Hash validate_facts fact_map @fact_map = YAML.load(fact_map.to_yaml).reduce({}) do |memo, tuple| memo[tuple.first.to_sym] = tuple.last memo end @host_spec = host_spec end |
Instance Attribute Details
#host_spec ⇒ Object (readonly)
Returns the value of attribute host_spec.
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# File 'lib/loom/facts/fact_set.rb', line 73 def host_spec @host_spec end |
Class Method Details
.create_for_host(host_spec, shell, loom_config) ⇒ Object
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# File 'lib/loom/facts/fact_set.rb', line 21 def create_for_host(host_spec, shell, loom_config) fact_map = {} fact_providers = Provider.create_fact_providers(host_spec, shell, loom_config) fact_providers.each do |provider| next if Provider.disabled_for_host?(host_spec, provider.class) namespace = provider.namespace Loom.log.debug { "loading facts from provider => #{provider}[#{namespace}]" } provider_facts = {} begin provider.collect_facts.each do |k, v| k = k.to_sym provider_facts[k] = v end if namespace if fact_map[namespace] Loom.log.warn "overriding fact[#{namespace}] with namespace" end fact_map[namespace] = provider_facts else provider_facts.each do |k, v| if fact_map[k] Loom.log.warn "overriding fact[#{k}]" end Loom.log.debug5(self) { "adding fact => #{k}=#{v.to_s}" } fact_map[k] = v end end rescue => e Loom.log.error "error executing fact provider #{provider.class} => #{e.}" Loom.log.debug(self) { e.backtrace.join("\n\t") } provider.disable(host_spec) end end FactSet.new host_spec, fact_map end |
Instance Method Details
#facts ⇒ Object
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# File 'lib/loom/facts/fact_set.rb', line 114 def facts @fact_map.dup end |
#get(fact_name) ⇒ Object Also known as: []
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# File 'lib/loom/facts/fact_set.rb', line 103 def get(fact_name) v = @fact_map[fact_name.to_sym] dup = v.dup rescue v if dup.nil? EMPTY else dup end end |
#hostname ⇒ Object
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# File 'lib/loom/facts/fact_set.rb', line 88 def hostname Loom.log.debug(<<NB `facts.hostname ` is actually the name by which SSH knows the host, not necessarily the actual host name. e.g. it may be an ip address, /etc/hosts alias, or ssh config alias. Use `facts.sshname` for the same value without this warning. NB ) sshname end |
#merge(facts) ⇒ Object
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# File 'lib/loom/facts/fact_set.rb', line 75 def merge(facts) facts = case facts when FactSet facts.facts when Hash facts else raise "unable to merge facts => #{facts.class}:#{facts}" end merged_facts = @fact_map.merge facts FactSet.new @host_spec, merged_facts end |
#sshname ⇒ Object
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# File 'lib/loom/facts/fact_set.rb', line 99 def sshname host_spec.hostname end |
#to_s ⇒ Object
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# File 'lib/loom/facts/fact_set.rb', line 118 def to_s @fact_map.to_a.map { |tuple| tuple.join "=" }.join "\n" end |