class TingYun::Configuration::YamlSource
Attributes
failures[RW]
file_path[RW]
Public Class Methods
new(path, env)
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Calls superclass method
TingYun::Configuration::DottedHash::new
# File lib/ting_yun/configuration/yaml_source.rb, line 12 def initialize(path, env) config = {} @failures = [] begin @file_path = vaildate_config_file_path(path) return unless @file_path ::TingYun::Agent.logger.info("Reading configuration from #{path} (#{Dir.pwd})") raw_file = File.read(@file_path) erb_file = process_erb(raw_file) config = process_yaml(erb_file, env, config, @file_path) rescue ScriptError, StandardError => e log_failure("Failed to read or parse configuration file at #{path}", e) end booleanify_values(config, 'agent_enabled', 'enabled') super(config, true) end
Public Instance Methods
failed?()
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# File lib/ting_yun/configuration/yaml_source.rb, line 32 def failed? !@failures.empty? end
Protected Instance Methods
booleanify_values(config, *keys)
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# File lib/ting_yun/configuration/yaml_source.rb, line 116 def booleanify_values(config, *keys) # auto means defer ro default keys.each do |option| if config[option] == 'auto' config.delete(option) elsif !config[option].nil? && !is_boolean?(config[option]) config[option] = !!(config[option] =~ /yes|on|true/i) end end end
is_boolean?(value)
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# File lib/ting_yun/configuration/yaml_source.rb, line 127 def is_boolean?(value) value == !!value end
log_failure(*messages)
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# File lib/ting_yun/configuration/yaml_source.rb, line 131 def log_failure(*messages) ::TingYun::Agent.logger.error(*messages) @failures << messages end
process_erb(file)
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# File lib/ting_yun/configuration/yaml_source.rb, line 71 def process_erb(file) begin # Exclude lines that are commented out so failing Ruby code in an # ERB template commented at the YML level is fine. Leave the line, # though, so ERB line numbers remain correct. file.gsub!(/^\s*#.*$/, '#') # Next two are for populating the tingyun.yml via erb binding, necessary # when using the default tingyun.yml file generated_for_user = '' license_key = '' ERB.new(file).result(binding) rescue ScriptError, StandardError => e log_failure("Failed ERB processing configuration file. This is typically caused by a Ruby error in <% %> templating blocks in your tingyun.yml file.", e) nil ensure # Avoid warnings by using these again generated_for_user = nil license_key = nil end end
process_yaml(file, env, config, path)
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# File lib/ting_yun/configuration/yaml_source.rb, line 94 def process_yaml(file, env, config, path) if file confighash = with_yaml_engine { YAML.load(file) } unless confighash.key?(env) log_failure("Config file at #{path} doesn't include a '#{env}' section!") end config = confighash[env] || {} end config end
vaildate_config_file_path(path)
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# File lib/ting_yun/configuration/yaml_source.rb, line 38 def vaildate_config_file_path(path) expanded_path = File.expand_path(path) if path.empty? || !File.exist?(expanded_path) warn_missing_config_file(expanded_path) return end expanded_path end
warn_missing_config_file(path)
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# File lib/ting_yun/configuration/yaml_source.rb, line 48 def warn_missing_config_file(path) based_on = 'unknown' source = ::TingYun::Agent.config.source(:config_path) candidate_paths = [path] case source when DefaultSource based_on = "default" candidate_paths = TingYun::Agent.config[:config_search_paths].map do |p| File.expand_path(p) end when EnvironmentSource based_on = "environment_source" when ManualSource based_on = 'API call' end TingYun::Agent.logger.warn( "No configuration file found. Working directory = #{Dir.pwd}", "Looked in these locations (based on #{based_on}): #{candidate_paths.join(", ")}" ) end
with_yaml_engine() { || ... }
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# File lib/ting_yun/configuration/yaml_source.rb, line 106 def with_yaml_engine return yield unless TingYun::Support::LanguageSupport.needs_syck? yamler = ::YAML::ENGINE.yamler ::YAML::ENGINE.yamler = 'syck' result = yield ::YAML::ENGINE.yamler = yamler result end