Module: Resource

Included in:
Rbbt
Defined in:
lib/rbbt/resource.rb,
lib/rbbt/resource/util.rb,
lib/rbbt/resource/with_key.rb

Defined Under Namespace

Modules: WithKey

Class Attribute Summary collapse

Instance Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Dynamic Method Handling

This class handles dynamic methods through the method_missing method

#method_missing(name, prev = nil, *args) ⇒ Object 



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# File 'lib/rbbt/resource.rb', line 37

def method_missing(name, prev = nil, *args)
  if prev.nil?
    root.send(name, *args)
  else
    root.send(name, prev, *args)
  end
end

Class Attribute Details

.lock_dir ⇒ Object

Returns the value of attribute lock_dir.



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# File 'lib/rbbt/resource.rb', line 11

def lock_dir
  @lock_dir
end

Instance Attribute Details

#pkgdir ⇒ Object

Returns the value of attribute pkgdir.



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# File 'lib/rbbt/resource.rb', line 31

def pkgdir
  @pkgdir
end

#rake_dirs ⇒ Object

Returns the value of attribute rake_dirs.



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# File 'lib/rbbt/resource.rb', line 31

def rake_dirs
  @rake_dirs
end

#remote_server ⇒ Object

Returns the value of attribute remote_server.



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# File 'lib/rbbt/resource.rb', line 31

def remote_server
  @remote_server
end

#resources ⇒ Object

Returns the value of attribute resources.



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# File 'lib/rbbt/resource.rb', line 31

def resources
  @resources
end

#search_paths ⇒ Object

Returns the value of attribute search_paths.



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# File 'lib/rbbt/resource.rb', line 31

def search_paths
  @search_paths
end

#server_missing_resource_cache ⇒ Object

Returns the value of attribute server_missing_resource_cache.



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# File 'lib/rbbt/resource.rb', line 68

def server_missing_resource_cache
  @server_missing_resource_cache
end

#subdir ⇒ Object

Returns the value of attribute subdir.



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# File 'lib/rbbt/resource.rb', line 31

def subdir
  @subdir
end

Class Method Details

.extended(base) ⇒ Object 



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# File 'lib/rbbt/resource.rb', line 22

def self.extended(base)
  base.pkgdir = 'rbbt'
  base.subdir = ''
  base.resources = {}
  base.rake_dirs = {}
  base.remote_server = Resource.remote_servers[base.to_s]
  base
end

.remote_servers ⇒ Object 



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# File 'lib/rbbt/resource.rb', line 18

def self.remote_servers
  @remote_servers = Rbbt.etc.file_servers.exists? ? Rbbt.etc.file_servers.yaml : {}
end

Instance Method Details

#[](file = nil) ⇒ Object 



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# File 'lib/rbbt/resource.rb', line 45

def [](file = nil)
  if file.nil?
    root
  else
    root.send(file)
  end
end

#claim(path, type, content = nil, &block) ⇒ Object 



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# File 'lib/rbbt/resource.rb', line 53

def claim(path, type, content = nil, &block)
  if type == :rake
    @rake_dirs[path] = content
  else
    @resources[path] = [type, content || block]

    if type == :install
      Log.debug "Preparing software: #{path}"
      path.produce
      software_dir = path.resource.root.software
      set_software_env(software_dir)
    end
  end
end

#get_from_server(path, final_path, remote_server = nil) ⇒ Object 



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# File 'lib/rbbt/resource.rb', line 69

def get_from_server(path, final_path, remote_server = nil)
  remote_server ||= self.remote_server
  url = File.join(remote_server, '/resource/', self.to_s, 'get_file')
  url << "?" << Misc.hash2GET_params(:file => path, :create => false)

  begin
    @server_missing_resource_cache ||= Set.new
    raise "Resource Not Found" if @server_missing_resource_cache.include? url
    lock_filename = Persist.persistence_path(final_path, {:dir => Resource.lock_dir})
    Misc.lock lock_filename do
      Net::HTTP.get_response URI(url) do |response|
        case response
        when Net::HTTPSuccess, Net::HTTPOK
          Misc.sensiblewrite(final_path) do |file|
            response.read_body do |chunk|
              file.write chunk
            end
          end
        when Net::HTTPRedirection, Net::HTTPFound
          location = response['location']
          Log.debug("Feching directory from: #{location}. Into: #{final_path}")
          FileUtils.mkdir_p final_path unless File.exists? final_path
          TmpFile.with_file do |tmp_dir|
            Misc.in_dir tmp_dir do
              CMD.cmd('tar xvfz -', :in => Open.open(location, :nocache => true))
            end
          end
          File.utils tmp_dir, final_path
        when Net::HTTPInternalServerError
          @server_missing_resource_cache << url
          raise "Resource Not Found"
        else
          raise "Response not understood: #{response.inspect}"
        end
      end
    end
  rescue
    Log.warn "Could not retrieve (#{self.to_s}) #{ path } from #{ remote_server }"
    Log.error $!.message
    FileUtils.rm_rf final_path if File.exists? final_path
    return false
  end
end

#has_rake(path) ⇒ Object 



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# File 'lib/rbbt/resource/util.rb', line 96

def has_rake(path)
  !! rake_for(path)
end

#produce(path, force = false) ⇒ Object 



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# File 'lib/rbbt/resource.rb', line 113

def produce(path, force = false)
  case
  when @resources.include?(path)
    type, content = @resources[path]
  when has_rake(path)
    type = :rake
    rake_dir, content = rake_for(path)
    rake_dir = Path.setup(rake_dir.dup, self.pkgdir, self)
  else
    raise "Resource is missing and does not seem to be claimed: #{ self } -- #{ path } "
  end

  if path.respond_to?(:find) 
    final_path = force ? path.find(:default) : path.find
  else
    final_path = path
  end

  if not File.exists? final_path or force
    Log.medium "Producing: #{ final_path }"
    lock_filename = Persist.persistence_path(final_path, {:dir => Resource.lock_dir})
    Misc.lock lock_filename do
      FileUtils.rm_rf final_path if force and File.exists? final_path
      if not File.exists? final_path or force
        (remote_server and get_from_server(path, final_path)) or
        begin
          case type
          when :string
            Misc.sensiblewrite(final_path, content)
          when :url
            Misc.sensiblewrite(final_path, Open.open(content))
          when :proc
            data = case content.arity
                   when 0
                     content.call
                   when 1
                     content.call final_path
                   end
            case data
            when String, IO
              Misc.sensiblewrite(final_path, data) 
            when Array
              Misc.sensiblewrite(final_path, data * "\n")
            when TSV
              Misc.sensiblewrite(final_path, data.dumper_stream) 
            when nil
            else
              raise "Unkown object produced: #{Misc.fingerprint data}"
            end
          when :rake
            run_rake(path, content, rake_dir)
          when :install
            Log.debug "Installing software: #{path}"
            software_dir = path.resource.root.software.find :user
            preamble = <<-EOF
#!/bin/bash

RBBT_SOFTWARE_DIR="#{software_dir}"

INSTALL_HELPER_FILE="#{Rbbt.share.install.software.lib.install_helpers.find :lib, caller_lib_dir(__FILE__)}"
source "$INSTALL_HELPER_FILE"
            EOF

            CMD.cmd('bash', :in => preamble + "\n" + Open.read(content))

            set_software_env(software_dir)
          else
            raise "Could not produce #{ resource }. (#{ type }, #{ content })"
          end
        rescue
          FileUtils.rm_rf final_path if File.exists? final_path
          raise $!
        end
      end
    end
  end

  path
end

#rake_for(path) ⇒ Object 



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# File 'lib/rbbt/resource/util.rb', line 88

def rake_for(path)
  @rake_dirs.reject{|dir, content|
    !Misc.common_path(dir, path)
  }.sort_by{|dir, content|
    dir.length
  }.last
end

#root ⇒ Object 



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# File 'lib/rbbt/resource.rb', line 33

def root()
  Path.setup @subdir || "", @pkgdir, self
end

#run_rake(path, rakefile, rake_dir) ⇒ Object 



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# File 'lib/rbbt/resource/util.rb', line 100

def run_rake(path, rakefile, rake_dir)
  task = Misc.path_relative_to rake_dir, path
  rakefile = rakefile.produce if rakefile.respond_to? :produce

  rake_dir = rake_dir.find(:user) if rake_dir.respond_to? :find

  begin
    require 'rbbt/resource/rake'
    Rake.run(rakefile, rake_dir, task)
  rescue Rake::TaskNotFound
    raise $! if rake_dir.nil? or rake_dir.empty? or rake_dir == "/" or rake_dir == "./"
    task = File.join(File.basename(rake_dir), task)
    rake_dir = File.dirname(rake_dir)
    retry
  end
end

#set_software_env(software_dir) ⇒ Object 



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# File 'lib/rbbt/resource/util.rb', line 32

def set_software_env(software_dir)
  software_dir.find_all.each do |software_dir|
    next unless software_dir.exists?
    bin_dir = File.join(software_dir, 'bin')
    opt_dir = File.join(software_dir, 'opt')

    Misc.env_add 'PATH', bin_dir

    FileUtils.mkdir_p opt_dir unless File.exists? opt_dir

    %w(.ld-paths .pkgconfig-paths .aclocal-paths .java-classpaths).each do |file|
      filename = File.join(opt_dir, file)
      begin
        FileUtils.touch filename unless File.exists? filename
      rescue
        Log.warn("Could not touch #{ filename }")
      end
    end

    Open.read(File.join opt_dir, '.ld-paths').split(/\n/).each do |line|
      Misc.env_add('LD_LIBRARY_PATH',line.chomp)
      Misc.env_add('LD_RUN_PATH',line.chomp)
    end if File.exists? File.join(opt_dir, '.ld-paths')

    Open.read(File.join opt_dir, '.pkgconfig-paths').split(/\n/).each do |line|
      Misc.env_add('PKG_CONFIG_PATH',line.chomp)
    end if File.exists? File.join(opt_dir, '.pkgconfig-paths')

    Open.read(File.join opt_dir, '.aclocal-paths').split(/\n/).each do |line|
      Misc.env_add('ACLOCAL_FLAGS', "-I#{File.join(opt_dir, line.chomp)}", ' ')
    end if File.exists? File.join(opt_dir, '.aclocal-paths')

    Open.read(File.join opt_dir, '.java-classpaths').split(/\n/).each do |line|
      Misc.env_add('CLASSPATH', "#{File.join(opt_dir,'java', 'lib', line.chomp)}")
    end if File.exists? File.join(opt_dir, '.java-classpaths')

    Dir.glob(File.join opt_dir, 'jars', '*').each do |file|
      Misc.env_add('CLASSPATH', "#{File.expand_path(file)}")
    end

    if File.exists?(File.join(opt_dir, '.post_install')) and File.directory?(File.join(opt_dir, '.post_install'))
      Dir.glob(File.join(opt_dir, '.post_install','*')).each do |file|
        begin
          begin
            File.chmod file
            CMD.cmd(file) 
          rescue
            Log.warn("Could not execute #{ file }")
          end
        end
      end
    end
  end
end

#with_key(key) ⇒ Object 



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# File 'lib/rbbt/resource/with_key.rb', line 20

def with_key(key)
  klass = self
  o     = Object.new
  o.extend WithKey
  o.klass = self
  o.key   = key
  o
end