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#
# Author:: Mathieu Sauve-Frankel <msf@kisoku.net>
# Copyright:: Copyright (c) 2009 Mathieu Sauve-Frankel.
# 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-config/path_helper"
require "chef-config/workstation_config_loader"
require "ohai"
require "ohai/log"
require "mixlib/cli"
require "benchmark"
# The Application class is what is called by the Ohai CLI binary. It handles:
# - CLI options and attribute arguments
# - Collecting data via the Ohai::System class
# - Printing the results returned via the Ohai::System class
class Ohai::Application
include Mixlib::CLI
option :config_file,
short: "-c CONFIG",
long: "--config CONFIG",
description: "A configuration file to use",
proc: lambda { |path| File.expand_path(path, Dir.pwd) }
option :directory,
short: "-d DIRECTORY",
long: "--directory DIRECTORY",
description: "A directory to add to the Ohai plugin search path. If passing multiple directories use this option more than once.",
proc: lambda { |path, path_array|
(path_array ||= []) << Ohai::Config.platform_specific_path(path)
path_array
}
option :log_level,
short: "-l LEVEL",
long: "--log_level LEVEL",
description: "Set the log level (debug, info, warn, error, fatal)",
proc: lambda { |l| l.to_sym }
option :log_location,
short: "-L LOGLOCATION",
long: "--logfile LOGLOCATION",
description: "Set the log file location, defaults to STDOUT - recommended for daemonizing",
proc: nil
option :print_plugins,
short: "-p",
long: "--print-plugins",
description: "Print information on each available plugin",
boolean: true
option :help,
short: "-h",
long: "--help",
description: "Show this message",
on: :tail,
boolean: true,
show_options: true,
exit: 0
option :version,
short: "-v",
long: "--version",
description: "Show Ohai version",
boolean: true,
proc: lambda { |v| puts "Ohai: #{::Ohai::VERSION}" },
exit: 0
# the method called by the Ohai binary to actually run the whole application
#
# @return void
def run
elapsed = Benchmark.measure do
configure_ohai
if config[:print_plugins]
run_print_plugins
else
run_application
end
end
Ohai::Log.debug("Ohai took #{elapsed.total} total seconds to run.")
end
# parses the CLI options, loads the config file if present, and initializes logging
#
# @return void
def configure_ohai
# @attributes receives all the attribute names passed on the CLI and we use
# it later to pass in the list of attributes to filter
@attributes = parse_options
@attributes = nil if @attributes.empty?
load_workstation_config
Ohai::Log.init(Ohai.config[:log_location])
end
# Passes config and attributes arguments to Ohai::System then prints the results.
# Called by the run method after config / logging have been initialized
#
# @return void
def run_application
config[:invoked_from_cli] = true
config[:logger] = Ohai::Log.with_child
ohai = Ohai::System.new(config)
ohai.all_plugins(@attributes)
if @attributes
@attributes.each do |a|
puts ohai.attributes_print(a)
end
else
puts ohai.json_pretty_print
end
end
def run_print_plugins
config[:invoked_from_cli] = true
config[:logger] = Ohai::Log.with_child
ohai = Ohai::System.new(config)
require 'pry'; binding.pry
ohai.list_plugins(@attributes)
end
class << self
# Log a fatal error message to both STDERR and the Logger, exit the application
# @param msg [String] the message to log
# @param err [Integer] the exit code
def fatal!(msg, err = -1)
STDERR.puts("FATAL: #{msg}")
Ohai::Log.fatal(msg)
Process.exit err
end
# Log a debug message to the Logger and then exit the application
# @param msg [String] the message to log
# @param err [Integer] the exit code
def exit!(msg, err = -1)
Ohai::Log.debug(msg)
Process.exit err
end
end
private
def load_workstation_config
config_loader = ChefConfig::WorkstationConfigLoader.new(
config[:config_file], Ohai::Log
)
begin
config_loader.load
rescue ChefConfig::ConfigurationError => config_error
Ohai::Application.fatal!(config_error.message)
end
end
end
|
