Class: Pups::Config

Inherits:
Object
  • Object
show all
Defined in:
lib/pups/config.rb

Instance Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(config) ⇒ Config

Returns a new instance of Config.



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# File 'lib/pups/config.rb', line 20

def initialize(config)
  @config = config
  validate!(@config)
  @params = @config["params"]
  @params ||= {}
  ENV.each do |k,v|
    @params["$ENV_#{k}"] = v
  end
  inject_hooks
end

Instance Attribute Details

#config ⇒ Object (readonly)

Returns the value of attribute config.



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# File 'lib/pups/config.rb', line 3

def config
  @config
end

#params ⇒ Object (readonly)

Returns the value of attribute params.



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# File 'lib/pups/config.rb', line 3

def params
  @params
end

Class Method Details

.interpolate_params(cmd, params) ⇒ Object 



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# File 'lib/pups/config.rb', line 119

def self.interpolate_params(cmd, params)
  return unless cmd
  processed = cmd.dup
  params.each do |k,v|
    processed.gsub!("$#{k}", v.to_s)
  end
  processed
end

.load_config(config) ⇒ Object 



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# File 'lib/pups/config.rb', line 16

def self.load_config(config)
  new YAML.load(config)
end

.load_file(config_file) ⇒ Object 



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# File 'lib/pups/config.rb', line 5

def self.load_file(config_file)
  begin
    new YAML.load_file(config_file)
  rescue Exception
    STDERR.puts "Failed to parse #{config_file}"
    STDERR.puts "This is probably a formatting error in #{config_file}"
    STDERR.puts "Cannot continue. Edit #{config_file} and try again."
    raise
  end
end

Instance Method Details

#inject_hooks ⇒ Object 



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# File 'lib/pups/config.rb', line 35

def inject_hooks
  return unless hooks = @config["hooks"]

  run = @config["run"]

  positions = {}
  run.each do |row|
    if Hash === row
      command = row.first
      if Hash === command[1]
        hook = command[1]["hook"]
        positions[hook] = row if hook
      end
    end
  end

  hooks.each do |full, list|

    offset = nil
    name = nil

    if full =~ /^after_/
      name = full[6..-1]
      offset = 1
    end

    if full =~ /^before_/
      name = full[7..-1]
      offset = 0
    end

    index = run.index(positions[name])

    if index && index >= 0
      run.insert(index + offset, *list)
    else
      Pups.log.info "Skipped missing #{full} hook"
    end

  end
end

#interpolate_params(cmd) ⇒ Object 



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# File 'lib/pups/config.rb', line 115

def interpolate_params(cmd)
  self.class.interpolate_params(cmd,@params)
end

#run ⇒ Object 



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# File 'lib/pups/config.rb', line 77

def run
  run_commands
rescue => e
  exit_code = 1
  if Pups::ExecError === e
    exit_code = e.exit_code
  end
  unless exit_code == 77
    puts
    puts
    puts "FAILED"
    puts "-" * 20
    puts "#{e.class}: #{e}"
    puts "Location of failure: #{e.backtrace[0]}"
    if @last_command
      puts "#{@last_command[:command]} failed with the params #{@last_command[:params].inspect}"
    end
  end
  exit exit_code
end

#run_commands ⇒ Object 



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# File 'lib/pups/config.rb', line 98

def run_commands
  @config["run"].each do |item|
    item.each do |k,v|
      type = case k
                when "exec" then Pups::ExecCommand
                when "merge" then Pups::MergeCommand
                when "replace" then Pups::ReplaceCommand
                when "file" then Pups::FileCommand
                else raise SyntaxError.new("Invalid run command #{k}")
            end

      @last_command = { command: k, params: v }
      type.run(v, @params)
    end
  end
end

#validate!(conf) ⇒ Object 



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# File 'lib/pups/config.rb', line 31

def validate!(conf)
  # raise proper errors if nodes are missing etc
end