Class: Chef::Knife::SubcommandLoader

Inherits:
Object
  • Object
show all
Defined in:
lib/chef/knife/core/subcommand_loader.rb

Constant Summary collapse

CHEF_FILE_IN_GEM = 
/chef-[\d]+\.[\d]+\.[\d]+/
CURRENT_CHEF_GEM = 
/chef-#{Regexp.escape(Chef::VERSION)}/

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(chef_config_dir, env = ENV) ⇒ SubcommandLoader

Returns a new instance of SubcommandLoader.



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# File 'lib/chef/knife/core/subcommand_loader.rb', line 30

def initialize(chef_config_dir, env=ENV)
  @chef_config_dir, @env = chef_config_dir, env
  @forced_activate = {}
end

Instance Attribute Details

#chef_config_dir ⇒ Object (readonly)

Returns the value of attribute chef_config_dir.



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# File 'lib/chef/knife/core/subcommand_loader.rb', line 27

def chef_config_dir
  @chef_config_dir
end

#env ⇒ Object (readonly)

Returns the value of attribute env.



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# File 'lib/chef/knife/core/subcommand_loader.rb', line 28

def env
  @env
end

Instance Method Details

#find_subcommands_via_dirglob ⇒ Object 



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# File 'lib/chef/knife/core/subcommand_loader.rb', line 77

def find_subcommands_via_dirglob
  # The "require paths" of the core knife subcommands bundled with chef
  files = Dir[File.expand_path('../../../knife/*.rb', __FILE__)]
  subcommand_files = {}
  files.each do |knife_file|
    rel_path = knife_file[/#{CHEF_ROOT}#{Regexp.escape(File::SEPARATOR)}(.*)\.rb/,1]
    subcommand_files[rel_path] = knife_file
  end
  subcommand_files
end

#find_subcommands_via_rubygems ⇒ Object 



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# File 'lib/chef/knife/core/subcommand_loader.rb', line 88

def find_subcommands_via_rubygems
  files = Gem.find_files 'chef/knife/*.rb'
  files.reject! {|f| from_old_gem?(f) }
  subcommand_files = {}
  files.each do |file|
    rel_path = file[/(#{Regexp.escape File.join('chef', 'knife', '')}.*)\.rb/, 1]
    subcommand_files[rel_path] = file
  end

  subcommand_files.merge(find_subcommands_via_dirglob)
end

#gem_and_builtin_subcommands ⇒ Object

Returns a Hash of paths to knife commands built-in to chef, or installed via gem. If rubygems is not installed, falls back to globbing the knife directory. The Hash is of the form => “/absolute/path” – Note: the “right” way to load the plugins is to require the relative path, i.e.,

require 'chef/knife/command'

but we’re getting frustrated by bugs at every turn, and it’s slow besides. So subcommand loader has been modified to load the plugins by using Kernel.load with the absolute path.



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# File 'lib/chef/knife/core/subcommand_loader.rb', line 65

def gem_and_builtin_subcommands
  # search all gems for chef/knife/*.rb
  require 'rubygems'
  find_subcommands_via_rubygems
rescue LoadError
  find_subcommands_via_dirglob
end

#load_commands ⇒ Object

Load all the sub-commands



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# File 'lib/chef/knife/core/subcommand_loader.rb', line 36

def load_commands
  subcommand_files.each { |subcommand| Kernel.load subcommand }
  true
end

#site_subcommands ⇒ Object

Returns an Array of paths to knife commands located in chef_config_dir/plugins/knife/ and ~/.chef/plugins/knife/



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# File 'lib/chef/knife/core/subcommand_loader.rb', line 43

def site_subcommands
  user_specific_files = []

  if chef_config_dir
    user_specific_files.concat Dir.glob(File.expand_path("plugins/knife/*.rb", chef_config_dir))
  end

  # finally search ~/.chef/plugins/knife/*.rb
  user_specific_files.concat Dir.glob(File.join(env['HOME'], '.chef', 'plugins', 'knife', '*.rb')) if env['HOME']

  user_specific_files
end

#subcommand_files ⇒ Object 



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# File 'lib/chef/knife/core/subcommand_loader.rb', line 73

def subcommand_files
  @subcommand_files ||= (gem_and_builtin_subcommands.values + site_subcommands).flatten.uniq
end