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#
# Author:: Adam Jacob (<adam@opscode.com>)
# Copyright:: Copyright (c) 2008 OpsCode, Inc.
# License:: GNU GPL, Version 3
#
# Copyright (C) 2008, OpsCode Inc.
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program. If not, see <http://www.gnu.org/licenses/>.
#
require 'rubygems'
require 'extlib'
require 'ohai/log'
require 'ohai/mixin/from_file'
require 'ohai/mixin/command'
require 'json'
module Ohai
class System
attr_accessor :data, :seen_plugins
include Ohai::Mixin::FromFile
include Ohai::Mixin::Command
def initialize
@data = Mash.new
@seen_plugins = Hash.new
end
def attribute?(name)
Ohai::Log.debug("Attribute #{name} is #{@data.has_key?(name)}")
@data.has_key?(name)
end
def set(name, *value)
set_attribute(name, *value)
end
def from(cmd)
status, stdout, stderr = run_command(:command => cmd)
stdout.chomp!
end
# Set the value equal to the stdout of the command, plus run through a regex - the first piece of match data is the value.
def from_with_regex(cmd, *regex_list)
regex_list.flatten.each do |regex|
status, stdout, stderr = run_command(:command => cmd)
stdout.chomp!
md = stdout.match(regex)
return md[1]
end
end
def set_attribute(name, *value)
Ohai::Log.debug("Setting attribute #{name} to #{value.inspect}")
@data[name] = *value
@data[name]
end
def get_attribute(name)
Ohai::Log.debug("Getting attribute #{name}, value #{@data[name].inspect}")
@data[name]
end
def all_plugins
Ohai::Config[:plugin_path].each do |path|
Dir[File.join(path, '**', '*')].each do |file|
file_regex = Regexp.new("#{path}#{File::SEPARATOR}(.+).rb$")
md = file_regex.match(file)
if md
plugin_name = md[1].gsub(File::SEPARATOR, "::")
require_plugin(plugin_name) unless @seen_plugins.has_key?(plugin_name)
end
end
end
end
def require_plugin(plugin_name)
return true if @seen_plugins[plugin_name]
filename = "#{plugin_name.gsub("::", File::SEPARATOR)}.rb"
Ohai::Config[:plugin_path].each do |path|
check_path = File.expand_path(File.join(path, filename))
begin
@seen_plugins[plugin_name] = true
Ohai::Log.info("Loading plugin #{plugin_name}")
from_file(check_path)
return true
rescue IOError => e
Ohai::Log.debug("No #{plugin_name} at #{check_path}")
rescue Exception => e
Ohai::Log.debug("Plugin #{plugin_name} threw exception #{e.inspect}")
end
end
end
# Serialize this object as a hash
def to_json(*a)
output = @data.clone
output["json_class"] = self.class.name
output.to_json(*a)
end
# Pretty Print this object as JSON
def json_pretty_print
JSON.pretty_generate(@data)
end
# Create an Ohai::System from JSON
def self.json_create(o)
ohai = new
o.each do |key, value|
ohai.data[key] = value unless key == "json_class"
end
ohai
end
def method_missing(name, *args)
return get_attribute(name) if args.length == 0
set_attribute(name, *args)
end
end
end
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