Module: Scout::Config

Defined in:
lib/scout/config.rb

Constant Summary collapse

GOT_KEYS = 
[]

Class Method Summary collapse

Class Method Details

.add_entry(key, value, tokens) ⇒ Object 



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# File 'lib/scout/config.rb', line 11

def self.add_entry(key, value, tokens)
  tokens = [tokens] unless Array === tokens
  tokens << "key:#{key}" unless tokens.include?("key:#{key}")
  CACHE[key.to_s] ||= [] 
  CACHE[key.to_s] << [tokens, value]
end

.get(key, *tokens) ⇒ Object

For equal priorities the matching prioritizes tokens ealier in the list



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# File 'lib/scout/config.rb', line 90

def self.get(key, *tokens)
  options = tokens.pop if Hash === tokens.last
  default = options.nil? ? nil : options[:default]

  tokens = ["key:" + key] if tokens.empty?

  tokens = tokens.flatten
  file, _sep, line = caller.reject{|l| 
    l =~ /rbbt\/(?:resource\.rb|workflow\.rb)/ or
      l =~ /rbbt\/resource\/path\.rb/ or
      l =~ /rbbt\/util\/misc\.rb/ or
      l =~ /accessor\.rb/ or
      l =~ /progress-monitor\.rb/ 
  }.first.partition(":")

  File.expand_path(file)

  tokens << ("file:" << file)
  tokens << ("line:" << file << ":" << line.sub(/:in \`.*/,''))

  entries = CACHE[key.to_s]
  priorities = {}
  tokens.each do |token|
    token_prio = match entries, token.to_s
    token_prio.each do |prio, values|
      priorities[prio] ||= []
      priorities[prio].concat(values)
    end
  end

  value = priorities.empty? ? default : priorities.collect{|p| p }.sort_by{|p,v| p}.first.last.first
  value = false if value == 'false'

  Log.debug "Value #{value.inspect} for config key '#{ key }': #{tokens * ", "}"
  GOT_KEYS << [key, value, tokens]

  if String === value && m = value.match(/^env:(.*)/)
    variable = m.captures.first
    ENV[variable]
  elsif value == 'nil'
    nil
  else
    value
  end
end

.load_config ⇒ Object 



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# File 'lib/scout/config.rb', line 28

def self.load_config
  Path.setup("etc").config.find_all.reverse.each do |file|
    self.load_file(file)
  end
end

.load_file(file) ⇒ Object 



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# File 'lib/scout/config.rb', line 18

def self.load_file(file)
  Log.debug "Loading config file: #{ file }"
  Open.read(file).split("\n").each do |line|
    next if line =~ /^#/
    key, value, *tokens = line.strip.split(/\s+/)

    self.add_entry(key, value, tokens) if key
  end
end

.match(entries, give_token) ⇒ Object 



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# File 'lib/scout/config.rb', line 70

def self.match(entries, give_token)
  priorities = {}
  entries.each do |tokens, value|
    best_prio = nil
    tokens = [tokens] unless Array === tokens
    tokens.each do |tok|
      tok, prio = token_priority tok
      next unless tok == give_token

      best_prio = prio if best_prio.nil? or best_prio > prio
      next if prio > best_prio

      priorities[prio] ||= []
      priorities[prio].unshift value
    end
  end if entries
  priorities
end

.process_config(config) ⇒ Object 



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# File 'lib/scout/config.rb', line 150

def self.process_config(config)
  if Path.is_filename?(config) && File.exist?(config)
    Scout::Config.load_file(config)
  elsif Scout.etc.config_profile[config].exists?
    Scout::Config.load_file(Scout.etc.config_profile[config].find)
  else
    key, value, *tokens = config.split(/\s/)
    tokens = tokens.collect do |tok|
      tok, _sep, prio = tok.partition("::")
      prio = "0" if prio.nil? or prio.empty?
      [tok, prio] * "::"
    end
    Scout::Config.set({key => value}, *tokens)
  end
end

.set(values, *tokens) ⇒ Object 



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# File 'lib/scout/config.rb', line 34

def self.set(values, *tokens)
  if not Hash === values
    values = {values => tokens.shift}
  end

  values.each do |key,value|
    add_entry key, value, tokens
  end
end

.token_priority(token) ⇒ Object 



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# File 'lib/scout/config.rb', line 44

def self.token_priority(token)
  token, _sep, priority = token.to_s.partition("::")

  if priority.nil? || priority.empty?
    type, _sep, rest = token.partition(":")
    priority = case type
               when "workflow"
                 4
               when "task"
                 3
               when "file"
                 2
               when "line"
                 1
               when "key"
                 20
               else
                 10
               end
  else
    priority = priority.to_i
  end

  [token, priority]
end

.with_config ⇒ Object 



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# File 'lib/scout/config.rb', line 136

def self.with_config
    saved_config = {}
    CACHE.each do |k,v|
      saved_config[k] = v.dup
    end
    saved_got_keys = GOT_KEYS.dup
  begin
    yield
  ensure
    CACHE.replace(saved_config)
    GOT_KEYS.replace(saved_got_keys)
  end
end