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# Author:: Christopher Brown (<cb@chef.io>)
# Author:: Daniel DeLeo (<dan@chef.io>)
# Copyright:: Copyright 2009-2016, Chef Software, 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"
require "chef/util/path_helper"
class Chef
class Knife
class SubcommandLoader
class GemGlobLoader < Chef::Knife::SubcommandLoader
MATCHES_CHEF_GEM = %r{/chef-[\d]+\.[\d]+\.[\d]+}.freeze
MATCHES_THIS_CHEF_GEM = %r{/chef-#{Chef::VERSION}(-\w+)?(-\w+)?/}.freeze
def subcommand_files
@subcommand_files ||= (gem_and_builtin_subcommands.values + site_subcommands).flatten.uniq
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
require "rubygems"
find_subcommands_via_rubygems
rescue LoadError
find_subcommands_via_dirglob
end
def find_subcommands_via_dirglob
# The "require paths" of the core knife subcommands bundled with chef
files = Dir[File.join(Chef::Util::PathHelper.escape_glob(File.expand_path("../../../knife", __FILE__)), "*.rb")]
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 = find_files_latest_gems "chef/knife/*.rb"
subcommand_files = {}
files.each do |file|
rel_path = file[/(#{Regexp.escape File.join('chef', 'knife', '')}.*)\.rb/, 1]
# When not installed as a gem (ChefDK/appbundler in particular), AND
# a different version of Chef is installed via gems, `files` will
# include some files from the 'other' Chef install. If this contains
# a knife command that doesn't exist in this version of Chef, we will
# get a LoadError later when we try to require it.
next if from_different_chef_version?(file)
subcommand_files[rel_path] = file
end
subcommand_files.merge(find_subcommands_via_dirglob)
end
private
def find_files_latest_gems(glob, check_load_path=true)
files = []
if check_load_path
files = $LOAD_PATH.map { |load_path|
Dir["#{File.expand_path glob, Chef::Util::PathHelper.escape_glob(load_path)}#{Gem.suffix_pattern}"]
}.flatten.select { |file| File.file? file.untaint }
end
gem_files = latest_gem_specs.map do |spec|
# Gem::Specification#matches_for_glob wasn't added until RubyGems 1.8
if spec.respond_to? :matches_for_glob
spec.matches_for_glob("#{glob}#{Gem.suffix_pattern}")
else
check_spec_for_glob(spec, glob)
end
end.flatten
files.concat gem_files
files.uniq! if check_load_path
return files
end
def latest_gem_specs
@latest_gem_specs ||= if Gem::Specification.respond_to? :latest_specs
Gem::Specification.latest_specs(true) # find prerelease gems
else
Gem.source_index.latest_specs(true)
end
end
def check_spec_for_glob(spec, glob)
dirs = if spec.require_paths.size > 1 then
"{#{spec.require_paths.join(',')}}"
else
spec.require_paths.first
end
glob = File.join(Chef::Util::PathHelper.escape_glob(spec.full_gem_path, dirs), glob)
Dir[glob].map { |f| f.untaint }
end
def from_different_chef_version?(path)
matches_any_chef_gem?(path) && !matches_this_chef_gem?(path)
end
def matches_any_chef_gem?(path)
path =~ MATCHES_CHEF_GEM
end
def matches_this_chef_gem?(path)
path =~ MATCHES_THIS_CHEF_GEM
end
end
end
end
end
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