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require 'puppet/util/warnings'
require 'puppet/util/cacher'
# Autoload paths, either based on names or all at once.
class Puppet::Util::Autoload
require 'puppet/util/autoload/file_cache'
include Puppet::Util
include Puppet::Util::Warnings
include Puppet::Util::Cacher
include Puppet::Util::Autoload::FileCache
@autoloaders = {}
@loaded = []
class << self
attr_reader :autoloaders
private :autoloaders
end
# Send [], []=, and :clear to the @autloaders hash
Puppet::Util.classproxy self, :autoloaders, "[]", "[]="
# List all loaded files.
def self.list_loaded
@loaded.sort { |a,b| a[0] <=> b[0] }.collect do |path, hash|
"#{path}: #{hash[:file]}"
end
end
# Has a given path been loaded? This is used for testing whether a
# changed file should be loaded or just ignored. This is only
# used in network/client/master, when downloading plugins, to
# see if a given plugin is currently loaded and thus should be
# reloaded.
def self.loaded?(path)
path = path.to_s.sub(/\.rb$/, '')
@loaded.include?(path)
end
# Save the fact that a given path has been loaded. This is so
# we can load downloaded plugins if they've already been loaded
# into memory.
def self.loaded(file)
$" << file + ".rb" unless $".include?(file)
@loaded << file unless @loaded.include?(file)
end
attr_accessor :object, :path, :objwarn, :wrap
def initialize(obj, path, options = {})
@path = path.to_s
raise ArgumentError, "Autoload paths cannot be fully qualified" if @path !~ /^\w/
@object = obj
self.class[obj] = self
options.each do |opt, value|
opt = opt.intern if opt.is_a? String
begin
self.send(opt.to_s + "=", value)
rescue NoMethodError
raise ArgumentError, "#{opt} is not a valid option"
end
end
@wrap = true unless defined?(@wrap)
end
# Load a single plugin by name. We use 'load' here so we can reload a
# given plugin.
def load(name,env=nil)
path = name.to_s + ".rb"
searchpath(env).each do |dir|
file = File.join(dir, path)
next unless file_exist?(file)
begin
Kernel.load file, @wrap
name = symbolize(name)
loaded name, file
return true
rescue SystemExit,NoMemoryError
raise
rescue Exception => detail
puts detail.backtrace if Puppet[:trace]
raise Puppet::Error, "Could not autoload #{name}: #{detail}"
end
end
false
end
# Mark the named object as loaded. Note that this supports unqualified
# queries, while we store the result as a qualified query in the class.
def loaded(name, file)
self.class.loaded(File.join(@path, name.to_s))
end
# Indicate whether the specfied plugin has been loaded.
def loaded?(name)
self.class.loaded?(File.join(@path, name.to_s))
end
# Load all instances that we can. This uses require, rather than load,
# so that already-loaded files don't get reloaded unnecessarily.
def loadall
# Load every instance of everything we can find.
files_to_load.each do |file|
name = File.basename(file).chomp(".rb").intern
next if loaded?(name)
begin
Kernel.require file
loaded(name, file)
rescue SystemExit,NoMemoryError
raise
rescue Exception => detail
puts detail.backtrace if Puppet[:trace]
raise Puppet::Error, "Could not autoload #{file}: #{detail}"
end
end
end
def files_to_load
searchpath.map { |dir| Dir.glob("#{dir}/*.rb") }.flatten
end
# The list of directories to search through for loadable plugins.
def searchpath(env=nil)
search_directories(env).uniq.collect { |d| File.join(d, @path) }.find_all { |d| FileTest.directory?(d) }
end
def module_directories(env=nil)
# We have to require this late in the process because otherwise we might have
# load order issues.
require 'puppet/node/environment'
real_env = Puppet::Node::Environment.new(env)
# We're using a per-thread cache of said module directories, so that
# we don't scan the filesystem each time we try to load something with
# this autoload instance. But since we don't want to cache for the eternity
# this env_module_directories gets reset after the compilation on the master.
# This is also reset after an agent ran.
# One of the side effect of this change is that this module directories list will be
# shared among all autoload that we have running at a time. But that won't be an issue
# as by definition those directories are shared by all autoload.
Thread.current[:env_module_directories] ||= {}
Thread.current[:env_module_directories][real_env] ||= real_env.modulepath.collect do |dir|
Dir.entries(dir).reject { |f| f =~ /^\./ }.collect { |f| File.join(dir, f) }
end.flatten.collect { |d| [File.join(d, "plugins"), File.join(d, "lib")] }.flatten.find_all do |d|
FileTest.directory?(d)
end
end
def search_directories(env=nil)
[module_directories(env), Puppet[:libdir].split(File::PATH_SEPARATOR), $LOAD_PATH].flatten
end
end
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