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#--
# Copyright (C) 2008 Red Hat Inc.
#
# This library 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 2 of the License, or (at your option) any later version.
#
# This library 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 library; if not, write to the Free Software
# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
#
# Author: Bryan Kearney <bkearney@redhat.com>
require 'augeas' if Puppet.features.augeas?
Puppet::Type.type(:augeas).provide(:augeas) do
#class Puppet::Provider::Augeas < Puppet::Provider
include Puppet::Util
confine :true => Puppet.features.augeas?
has_features :parse_commands, :need_to_run?,:execute_changes
# Extracts an 2 dimensional array of commands which are in the
# form of command path value.
# The input can be
# - A string with one command
# - A string with many commands per line
# - An array of strings.
def parse_commands(data)
commands = Array.new()
if data.is_a?(String)
data.each_line do |line|
cmd_array = Array.new()
single = line.index("'")
double = line.index('"')
tokens = nil
delim = " "
if ((single != nil) or (double != nil))
single = 99999 if single == nil
double = 99999 if double == nil
delim = '"' if double < single
delim = "'" if single < double
end
tokens = line.split(delim)
# If the length of tokens is 2, thn that means the pattern was
# command file "some text", therefore we need to re-split
# the first line
if tokens.length == 2
tokens = (tokens[0].split(" ")) << tokens[1]
end
cmd = tokens.shift().strip()
delim = "" if delim == " "
file = tokens.shift().strip()
other = tokens.join(" ").strip()
cmd_array << cmd if !cmd.nil?
cmd_array << file if !file.nil?
cmd_array << other if other != ""
commands << cmd_array
end
elsif data.is_a?(Array)
data.each do |datum|
commands.concat(parse_commands(datum))
end
end
return commands
end
def open_augeas
flags = 0
(flags = 1 << 2 ) if self.resource[:type_check] == :true
root = self.resource[:root]
load_path = self.resource[:load_path]
debug("Opening augeas with root #{root}, lens path #{load_path}, flags #{flags}")
Augeas.open(root, load_path,flags)
end
# Used by the need_to_run? method to process get filters. Returns
# true if there is a match, false if otherwise
# Assumes a syntax of get /files/path [COMPARATOR] value
def process_get(cmd_array)
return_value = false
#validate and tear apart the command
fail ("Invalid command: #{cmd_array.join(" ")}") if cmd_array.length < 4
cmd = cmd_array.shift()
path = cmd_array.shift()
comparator = cmd_array.shift()
arg = cmd_array.join(" ")
#check the value in augeas
aug = open_augeas()
result = aug.get(path) || ''
unless result.nil?
case comparator
when "!="
return_value = true if !(result == arg)
when "=~"
regex = Regexp.new(arg)
loc = result=~ regex
return_value = true if ! loc.nil?
else
return_value = true if (result.send(comparator, arg))
end
end
return_value
end
# Used by the need_to_run? method to process match filters. Returns
# true if there is a match, false if otherwise
def process_match(cmd_array)
return_value = false
#validate and tear apart the command
fail("Invalid command: #{cmd_array.join(" ")}") if cmd_array.length < 4
cmd = cmd_array.shift()
path = cmd_array.shift()
verb = cmd_array.shift()
#Get the values from augeas
aug = open_augeas()
result = aug.match(path) || ''
# Now do the work
if (!result.nil?)
case verb
when "size"
fail("Invalid command: #{cmd_array.join(" ")}") if cmd_array.length != 2
comparator = cmd_array.shift()
arg = cmd_array.shift().to_i
return_value = true if (result.size.send(comparator, arg))
when "include"
arg = cmd_array.join(" ")
return_value = true if result.include?(arg)
when "=="
begin
arg = cmd_array.join(" ")
new_array = eval arg
return_value = true if result == new_array
rescue
fail("Invalid array in command: #{cmd_array.join(" ")}")
end
end
end
return_value
end
# Determines if augeas acutally needs to run.
def need_to_run?
return_value = true
filter = resource[:onlyif]
unless (filter == "")
cmd_array = filter.split
command = cmd_array[0];
cmd_array[1]= File.join(resource[:context], cmd_array[1])
begin
data = nil
case command
when "get"; return_value = process_get(cmd_array)
when "match"; return_value = process_match(cmd_array)
end
rescue Exception => e
fail("Error sending command '#{command}' with params #{cmd_array[1..-1].inspect}/#{e.message}")
end
end
return_value
end
# Actually execute the augeas changes.
def execute_changes
aug = open_augeas
commands = resource[:changes]
context = resource[:context]
commands.each do |cmd_array|
fail("invalid command #{cmd_array.join[" "]}") if cmd_array.length < 2
command = cmd_array[0]
cmd_array.shift()
begin
case command
when "set"
cmd_array[0]=File.join(context, cmd_array[0])
debug("sending command '#{command}' with params #{cmd_array.inspect}")
aug.set(cmd_array[0], cmd_array[1])
when "rm", "remove"
cmd_array[0]=File.join(context, cmd_array[0])
debug("sending command '#{command}' with params #{cmd_array.inspect}")
aug.rm(cmd_array[0])
when "clear"
cmd_array[0]=File.join(context, cmd_array[0])
debug("sending command '#{command}' with params #{cmd_array.inspect}")
aug.clear(cmd_array[0])
when "insert", "ins"
ext_array = cmd_array[1].split(" ") ;
if cmd_array.size < 2 or ext_array.size < 2
fail("ins requires 3 parameters")
end
label = cmd_array[0]
where = ext_array[0]
path = File.join(context, ext_array[1])
case where
when "before"; before = true
when "after"; before = false
else fail("Invalid value '#{where}' for where param")
end
debug("sending command '#{command}' with params #{[label, where, path].inspect()}")
aug.insert(path, label, before)
else fail("Command '#{command}' is not supported")
end
rescue Exception => e
fail("Error sending command '#{command}' with params #{cmd_array.inspect}/#{e.message}")
end
end
success = aug.save()
if (success != true)
fail("Save failed with return code #{success}")
end
return :executed
end
end
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