Class: Merb::Config

Inherits:
Object show all
Defined in:
merb-core/lib/merb-core/config.rb,
merb-core/lib/merb-core/dispatch/session.rb

Defined Under Namespace

Classes: ConfigBlock

Class Attribute Summary (collapse)

Class Method Summary (collapse)

Class Attribute Details

+ (Object) configuration

This method is part of a private API. You should avoid using this method if possible, as it may be removed or be changed in the future.



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# File 'merb-core/lib/merb-core/config.rb', line 402

def configuration
  @configuration
end

Class Method Details

+ (Object) [](key)

Retrieve the value of a config entry.



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# File 'merb-core/lib/merb-core/config.rb', line 75

def [](key)
  (@configuration ||= setup)[key]
end

+ (Object) []=(key, val)

Set the value of a config entry.



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# File 'merb-core/lib/merb-core/config.rb', line 85

def []=(key, val)
  (@configuration ||= setup)[key] = val
end

+ (nil) configure(&block)

Set configuration parameters from a code block, where each method evaluates to a config parameter.

Examples:

Use like:

# Set environment and log level.
Merb::Config.configure do
  environment "development"
  log_level   "debug"
  log_file    Merb.root / "log" / "special.log"
end


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# File 'merb-core/lib/merb-core/config.rb', line 420

def configure(&block)
  ConfigBlock.new(self, &block) if block_given?
  nil
end

+ (Hash) defaults

This method is part of a private API. You should avoid using this method if possible, as it may be removed or be changed in the future.

Get default config values for Merb.



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# File 'merb-core/lib/merb-core/config.rb', line 14

def defaults
  @defaults ||= {
    :host                   => "0.0.0.0",
    :port                   => "4000",
    :adapter                => "runner",
    :reload_classes         => true,
    :fork_for_class_load    => Merb.forking_environment?,
    :environment            => "development",
    :merb_root              => Dir.pwd,
    :use_mutex              => true,
    :log_delimiter          => " ~ ",
    :log_auto_flush         => false,
    :log_level              => :info,
    :log_stream             => STDOUT,
    :disabled_components    => Merb.on_windows? ? [:signals] : [],
    :deferred_actions       => [],
    :verbose                => false,
    :name                   => "merb",
    :kernel_dependencies    => true,
    :gemfile                => nil,
    :gemenv                 => nil
  }
end

+ (Object) delete(key)

Remove the value of a config entry.



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# File 'merb-core/lib/merb-core/config.rb', line 96

def delete(key)
  @configuration.delete(key)
end

+ (Object) fetch(key, default)

Retrieve the value of a config entry, returning the provided default if the key is not present.

==== Returns Object:: The value of the configuration parameter or the default.



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# File 'merb-core/lib/merb-core/config.rb', line 111

def fetch(key, default)
  @configuration.fetch(key, default)
end

+ (Boolean) key?(key)

Detects whether the provided key is in the config.



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# File 'merb-core/lib/merb-core/config.rb', line 64

def key?(key)
  @configuration.key?(key)
end

+ (Object) method_missing(method, *args)

Allows retrieval of single key config values via Merb.config.<key> Allows single key assignment via Merb.config.<key> = ...



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# File 'merb-core/lib/merb-core/config.rb', line 434

def method_missing(method, *args)
  if method.to_s[-1,1] == '='
    @configuration[method.to_s.tr('=','').to_sym] = *args
  else
    @configuration[method]
  end
end

+ (Hash) parse_args(argv = ARGV)

This method is part of a private API. You should avoid using this method if possible, as it may be removed or be changed in the future.

Parses the command line arguments and stores them in the config.



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# File 'merb-core/lib/merb-core/config.rb', line 175

def parse_args(argv = ARGV)
  @configuration ||= {}
  # Our primary configuration hash for the length of this method
  options = {}

  # Environment variables always win
  options[:environment] = ENV["MERB_ENV"] if ENV["MERB_ENV"]

  # Build a parser for the command line arguments
  opts = OptionParser.new do |opts|
    opts.version = Merb::VERSION

    opts.banner = "Usage: merb [uGdcIpPhmailLerkKX] [argument]"
    opts.define_head "Merb. Pocket rocket web framework"
    opts.separator '*' * 80
    opts.separator "If no flags are given, Merb starts in the " \
      "foreground on port 4000."
    opts.separator '*' * 80

    opts.on("-u", "--user USER", "This flag is for having merb run " \
            "as a user other than the one currently logged in. Note: " \
            "if you set this you must also provide a --group option " \
            "for it to take effect.") do |user|
      options[:user] = user
    end

    opts.on("-G", "--group GROUP", "This flag is for having merb run " \
            "as a group other than the one currently logged in. Note: " \
            "if you set this you must also provide a --user option " \
            "for it to take effect.") do |group|
      options[:group] = group
    end

    opts.on("-d", "--daemonize", "This will run a single merb in the " \
            "background.") do |daemon|
      options[:daemonize] = true
    end

    opts.on("-N", "--no-daemonize", "This will allow you to run a " \
            "cluster in console mode") do |no_daemon|
      options[:daemonize] = false
    end

    opts.on("-c", "--cluster-nodes NUM_MERBS", Integer, 
            "Number of merb daemons to run.") do |nodes|
      options[:daemonize] = true unless options.key?(:daemonize)
      options[:cluster] = nodes
    end

    opts.on("-I", "--init-file FILE", "File to use for initialization " \
            "on load, defaults to config/init.rb") do |init_file|
      options[:init_file] = init_file
    end

    opts.on("-p", "--port PORTNUM", Integer, "Port to run merb on, " \
            "defaults to 4000.") do |port|
      options[:port] = port
    end

    opts.on("-o", "--socket-file FILE", "Socket file to run merb on, " \
            "defaults to [Merb.root]/log/merb.sock. This is for " \
            "web servers, like thin, that use sockets." \
            "Specify this *only* if you *must*.") do |port|
      options[:socket_file] = port
    end

    opts.on("-s", "--socket SOCKNUM", Integer, "Socket number to run " \
            "merb on, defaults to 0.") do |port|
      options[:socket] = port
    end

    opts.on("-n", "--name NAME", String, "Set the name of the application. "\
            "This is used in the process title and log file names.") do |name|
      options[:name] = name
    end

    opts.on("-P", "--pid PIDFILE", "PID file, defaults to " \
            "[Merb.root]/log/merb.main.pid for the master process and" \
            "[Merb.root]/log/merb.[port number].pid for worker " \
            "processes. For clusters, use %s to specify where " \
            "in the file merb should place the port number. For " \
            "instance: -P myapp.%s.pid") do |pid_file|
      options[:pid_file] = pid_file
    end

    opts.on("-h", "--host HOSTNAME", "Host to bind to " \
            "(default is 0.0.0.0).") do |host|
      options[:host] = host
    end

    opts.on("-m", "--merb-root /path/to/approot", "The path to the " \
            "Merb.root for the app you want to run " \
            "(default is current working directory).") do |root|
      options[:merb_root] = File.expand_path(root)
    end

    adapters = [:mongrel, :emongrel, :thin, :ebb, :fastcgi, :webrick]

    opts.on("-a", "--adapter ADAPTER",
            "The rack adapter to use to run merb (default is thin)" \
            "[#{adapters.join(', ')}]") do |adapter|
      options[:adapter] ||= adapter
    end

    opts.on("-R", "--rackup FILE", "Load an alternate Rack config " \
            "file (default is config/rack.rb)") do |rackup|
      options[:rackup] = rackup
    end

    opts.on("-i", "--irb-console", "This flag will start merb in " \
            "irb console mode. All your models and other classes will " \
            "be available for you in an irb session.") do |console|
      options[:adapter] = 'irb'
    end

    opts.on("-S", "--sandbox", "This flag will enable a sandboxed irb " \
            "console. If your ORM supports transactions, all edits will " \
            "be rolled back on exit.") do |sandbox|
      options[:sandbox] = true
    end

    opts.on("-l", "--log-level LEVEL", "Log levels can be set to any of " \
            "these options: debug < info < warn < error < " \
            "fatal (default is info)") do |log_level|
      options[:log_level] = log_level.to_sym
      options[:force_logging] = true
    end

    opts.on("-L", "--log LOGFILE", "A string representing the logfile to " \
            "use. Defaults to [Merb.root]/log/merb.[main].log for the " \
            "master process and [Merb.root]/log/merb[port number].log" \
            "for worker processes") do |log_file|
      options[:log_file] = log_file
      options[:force_logging] = true
    end

    opts.on("-e", "--environment STRING", "Environment to run Merb " \
            "under [development, production, test] " \
            "(default is development)") do |env|
      options[:environment] = env
    end

    opts.on("-r", "--script-runner ['RUBY CODE'| FULL_SCRIPT_PATH]",
            "Command-line option to run scripts and/or code in the " \
            "merb app.") do |code_or_file|
      options[:runner_code] = code_or_file
      options[:adapter] = 'runner'
    end

    opts.on("-K", "--graceful PORT or all", "Gracefully kill one " \
            "merb proceses by port number.  Use merb -K all to " \
            "gracefully kill all merbs.") do |ports|
      options[:action] = :kill
      ports = "main" if ports == "all"
      options[:port] = ports
    end

    opts.on("-k", "--kill PORT", "Force kill one merb worker " \
            "by port number. This will cause the worker to" \
            "be respawned.") do |port|
      options[:action] = :kill_9
      port = "main" if port == "all"
      options[:port] = port
    end

    opts.on("--fast-deploy", "Reload the code, but not your" \
      "init.rb or gems") do
        options[:action] = :fast_deploy
    end

    # @todo Do we really need this flag? It seems unlikely to want to
    #   change the mutex from the command-line.
    opts.on("-X", "--mutex on/off", "This flag is for turning the " \
            "mutex lock on and off.") do |mutex|
      if mutex == "off"
        options[:use_mutex] = false
      else
        options[:use_mutex] = true
      end
    end

    opts.on("-D", "--debugger", "Run merb using rDebug.") do
      begin
        require "ruby-debug"
        Debugger.start

        # Load up any .rdebugrc files we find
        [".", ENV["HOME"], ENV["HOMEPATH"]].each do |script_dir|
          script_file = "#{script_dir}/.rdebugrc"
          Debugger.run_script script_file, StringIO.new if File.exists?(script_file)
        end

        if Debugger.respond_to?(:settings)
          Debugger.settings[:autoeval] = true
        end
        puts "Debugger enabled"
      rescue LoadError
        puts "You need to install ruby-debug to run the server in " \
          "debugging mode. With gems, use `gem install ruby-debug'"
        exit
      end
    end

    opts.on("-V", "--verbose", "Print extra information") do
      options[:verbose] = true
    end

    opts.on("-C", "--console-trap", "Enter an irb console on ^C") do
      options[:console_trap] = true
    end

    opts.on("-?", "-H", "--help", "Show this help message") do
      puts opts
      exit
    end
  end

  # Parse what we have on the command line
  begin
    opts.parse!(argv)
  rescue OptionParser::InvalidOption => e
    Merb.fatal! e.message, e
  end
  Merb::Config.setup(options)
end

+ (Object) session_stores

This method is part of a private API. You should avoid using this method if possible, as it may be removed or be changed in the future.

Returns stores list constructed from configured session stores (:session_stores config option) or default one (:session_store config option).



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# File 'merb-core/lib/merb-core/dispatch/session.rb', line 17

def self.session_stores
  @session_stores ||= begin
    config_stores = Array(
      Merb::Config[:session_stores] || Merb::Config[:session_store]
    )
    config_stores.map { |name| name.to_sym }
  end
end

+ (Hash) setup(settings = {})

This method is part of a private API. You should avoid using this method if possible, as it may be removed or be changed in the future.

Sets up the configuration by storing the given settings.



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# File 'merb-core/lib/merb-core/config.rb', line 142

def setup(settings = {})
  # Merge new settings with any existing configuration settings
  settings = @configuration.merge(settings) unless @configuration.nil?
  
  # Merge new settings with default settings
  config = defaults.merge(settings)
  
  unless config[:reload_classes]
    config[:fork_for_class_load] = false
  end

  dev_mode = config[:environment] == "development"
  unless config.key?(:reap_workers_quickly)
    config[:reap_workers_quickly] = dev_mode & !config[:cluster]
  end
  
  unless config.key?(:bind_fail_fatal)
    config[:bind_fail_fatal] = dev_mode
  end
  
  # Set mutex to dispatcher
  ::Merb::Dispatcher.use_mutex = config[:use_mutex]

  @configuration = config
end

+ (Hash) to_hash

Returns the configuration as a hash.



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# File 'merb-core/lib/merb-core/config.rb', line 120

def to_hash
  @configuration
end

+ (String) to_yaml

Returns the config as YAML.



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# File 'merb-core/lib/merb-core/config.rb', line 129

def to_yaml
  require "yaml"
  @configuration.to_yaml
end

+ (nil) use {|config| ... }

Yields the configuration.

Examples:

Use like:

Merb::Config.use do |config|
  config[:exception_details] = false
  config[:log_stream]        = STDOUT
end

Yield Parameters:

  • config (Hash)

    The configuration



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# File 'merb-core/lib/merb-core/config.rb', line 51

def use
  @configuration ||= {}
  yield @configuration
  nil
end