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|
#!/usr/bin/env ruby
#
# = Synopsis
#
# Collect and display facts about the system.
#
# = Usage
#
# facter [-d|--debug] [-h|--help] [-v|--version] [-y|--yaml] [fact] [fact] [...]
#
# = Description
#
# Collect and display facts about the current system. The library behind
# Facter is easy to expand, making Facter an easy way to collect information
# about a system from within the shell or within Ruby.
#
# If no facts are specifically asked for, then all facts will be returned.
#
# = Options
#
# debug::
# Enable debugging.
#
# help::
# Print this help message
#
# version::
# Print the version and exit.
#
# yaml::
# Emit facts in YAML format.
#
# = Example
#
# facter kernel
#
# = Author
#
# Luke Kanies
#
# = Copyright
#
# Copyright (c) 2006 Reductive Labs, LLC
# Licensed under the GNU Public License
require 'getoptlong'
require 'facter'
$haveusage = true
begin
require 'rdoc/ri/ri_paths'
require 'rdoc/usage'
rescue Exception
$haveusage = false
end
$debug = 0
config = nil
result = GetoptLong.new(
[ "--version", "-v", GetoptLong::NO_ARGUMENT ],
[ "--help", "-h", GetoptLong::NO_ARGUMENT ],
[ "--debug", "-d", GetoptLong::NO_ARGUMENT ],
[ "--yaml", "-y", GetoptLong::NO_ARGUMENT ],
[ "--config", "-c", GetoptLong::REQUIRED_ARGUMENT ]
)
options = {
:yaml => false
}
result.each { |opt,arg|
case opt
when "--version"
puts "%s" % Facter.version
exit
when "--yaml"
options[:yaml] = true
when "--debug"
Facter.debugging(1)
when "--help"
if $haveusage
RDoc::usage && exit
else
puts "No help available unless you have RDoc::usage installed"
exit
end
else
$stderr.puts "Invalid option '#{opt}'"
exit(12)
end
}
names = []
unless config.nil?
File.open(config) { |file|
names = file.readlines.collect { |line|
line.chomp
}
}
end
ARGV.each { |item|
names.push item
}
if names.empty?
facts = Facter.to_hash
else
facts = {}
names.each { |name|
begin
facts[name] = Facter.value(name)
rescue => error
STDERR.puts "Could not retrieve %s: #{error}" % name
exit 10
end
}
end
if options[:yaml]
require 'yaml'
puts YAML.dump(facts)
exit(0)
end
facts.sort { |a, b| a[0].to_s <=> b[0].to_s }.each { |name,value|
if facts.length == 1
unless value.nil?
puts value
end
else
puts "%s => %s" % [name,value]
end
}
|
