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require 'puppet/util/warnings'
# Autoload paths, either based on names or all at once.
class Puppet::Util::Autoload
include Puppet::Util
include Puppet::Util::Warnings
@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|
"%s: %s" % [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)
@loaded << file unless @loaded.include?(file)
end
attr_accessor :object, :path, :objwarn, :wrap
def initialize(obj, path, options = {})
@path = path.to_s
if @path !~ /^\w/
raise ArgumentError, "Autoload paths cannot be fully qualified"
end
@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, "%s is not a valid option" % opt
end
end
unless defined? @wrap
@wrap = true
end
end
# Load a single plugin by name. We use 'load' here so we can reload a
# given plugin.
def load(name)
path = name.to_s + ".rb"
eachdir do |dir|
file = File.join(dir, path)
next unless FileTest.exists?(file)
begin
Kernel.load file, @wrap
name = symbolize(name)
loaded name, file
return true
rescue LoadError => detail
# I have no idea what's going on here, but different versions
# of ruby are raising different errors on missing files.
unless detail.to_s =~ /^no such file/i
warn "Could not autoload %s: %s" % [name, detail]
if Puppet[:trace]
puts detail.backtrace
end
end
return false
end
end
return 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.
eachdir do |dir|
Dir.glob("#{dir}/*.rb").each do |file|
name = File.basename(file).sub(".rb", '').intern
next if loaded?(name)
rubypath = File.join(@path, name.to_s)
begin
Kernel.require rubypath
loaded(name, file)
rescue => detail
if Puppet[:trace]
puts detail.backtrace
end
warn "Could not autoload %s: %s" % [file.inspect, detail]
end
end
end
end
# Yield each subdir in turn.
def eachdir
searchpath.each do |dir|
subdir = File.join(dir, @path)
yield subdir if FileTest.directory?(subdir)
end
end
# The list of directories to search through for loadable plugins.
def searchpath
# JJM: Search for optional lib directories in each module bundle.
module_lib_dirs = Puppet[:modulepath].split(":").collect do |d|
Dir.glob("%s/*/{plugins,lib}" % d).select do |f|
if f =~ /lib$/
# LAK: Deprecated on 2/14/08
warnonce "Using 'lib' in modules is deprecated; switch %s to 'plugins'" % f
end
FileTest.directory?(f)
end
end.flatten
[module_lib_dirs, Puppet[:libdir], $:].flatten
end
end
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