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# Author:: Christopher Brown (<cb@opscode.com>)
# Author:: Daniel DeLeo (<dan@opscode.com>)
# Copyright:: Copyright (c) 2009, 2011 Opscode, Inc.
# License:: Apache License, Version 2.0
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
#
require 'chef/version'
class Chef
class Knife
class SubcommandLoader
CHEF_FILE_IN_GEM = /chef-[\d]+\.[\d]+\.[\d]+/
CURRENT_CHEF_GEM = /chef-#{Regexp.escape(Chef::VERSION)}/
attr_reader :chef_config_dir
attr_reader :env
def initialize(chef_config_dir, env=ENV)
@chef_config_dir, @env = chef_config_dir, env
@forced_activate = {}
end
# Load all the sub-commands
def load_commands
subcommand_files.each { |subcommand| Kernel.load subcommand }
true
end
# Returns an Array of paths to knife commands located in chef_config_dir/plugins/knife/
# and ~/.chef/plugins/knife/
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
# 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 {"relative/path" => "/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.
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
def subcommand_files
@subcommand_files ||= (gem_and_builtin_subcommands.values + site_subcommands).flatten.uniq
end
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
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
private
# wow, this is a sad hack :(
# Gem.find_files finds files in all versions of a gem, which
# means that if chef 0.10 and 0.9.x are installed, we'll try to
# require, e.g., chef/knife/ec2_server_create, which will cause
# a gem activation error. So remove files from older chef gems.
def from_old_gem?(path)
path =~ CHEF_FILE_IN_GEM && path !~ CURRENT_CHEF_GEM
end
end
end
end
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