1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
|
#
# Author:: Adam Jacob (<adam@opscode.com>)
# Author:: Christopher Walters (<cw@opscode.com>)
# Copyright:: Copyright (c) 2008, 2009 Opscode, Inc.
# 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/resource'
require 'chef/resource_collection/stepable_iterator'
class Chef
class ResourceCollection
include Enumerable
attr_reader :iterator
def initialize
@resources = Array.new
@resources_by_name = Hash.new
@insert_after_idx = nil
end
def all_resources
@resources
end
def [](index)
@resources[index]
end
def []=(index, arg)
is_chef_resource(arg)
@resources[index] = arg
@resources_by_name[arg.to_s] = index
end
def <<(*args)
args.flatten.each do |a|
is_chef_resource(a)
@resources << a
@resources_by_name[a.to_s] = @resources.length - 1
end
end
def insert(resource)
is_chef_resource(resource)
if @insert_after_idx
# in the middle of executing a run, so any resources inserted now should
# be placed after the most recent addition done by the currently executing
# resource
@resources.insert(@insert_after_idx + 1, resource)
# update name -> location mappings and register new resource
@resources_by_name.each_key do |key|
@resources_by_name[key] += 1 if @resources_by_name[key] > @insert_after_idx
end
@resources_by_name[resource.to_s] = @insert_after_idx + 1
@insert_after_idx += 1
else
@resources << resource
@resources_by_name[resource.to_s] = @resources.length - 1
end
end
def push(*args)
args.flatten.each do |arg|
is_chef_resource(arg)
@resources.push(arg)
@resources_by_name[arg.to_s] = @resources.length - 1
end
end
def each
@resources.each do |resource|
yield resource
end
end
def execute_each_resource(&resource_exec_block)
@iterator = StepableIterator.for_collection(@resources)
@iterator.each_with_index do |resource, idx|
@insert_after_idx = idx
yield resource
end
end
def each_index
@resources.each_index do |i|
yield i
end
end
def lookup(resource)
lookup_by = nil
if resource.kind_of?(Chef::Resource)
lookup_by = resource.to_s
elsif resource.kind_of?(String)
lookup_by = resource
else
raise ArgumentError, "Must pass a Chef::Resource or String to lookup"
end
res = @resources_by_name[lookup_by]
unless res
raise Chef::Exceptions::ResourceNotFound, "Cannot find a resource matching #{lookup_by} (did you define it first?)"
end
@resources[res]
end
# Find existing resources by searching the list of existing resources. Possible
# forms are:
#
# find(:file => "foobar")
# find(:file => [ "foobar", "baz" ])
# find("file[foobar]", "file[baz]")
# find("file[foobar,baz]")
#
# Returns the matching resource, or an Array of matching resources.
#
# Raises an ArgumentError if you feed it bad lookup information
# Raises a Runtime Error if it can't find the resources you are looking for.
def find(*args)
results = Array.new
args.each do |arg|
case arg
when Hash
results << find_resource_by_hash(arg)
when String
results << find_resource_by_string(arg)
else
msg = "arguments to #{self.class.name}#find should be of the form :resource => 'name' or resource[name]"
raise Chef::Exceptions::InvalidResourceSpecification, msg
end
end
flat_results = results.flatten
flat_results.length == 1 ? flat_results[0] : flat_results
end
# resources is a poorly named, but we have to maintain it for back
# compat.
alias_method :resources, :find
# Serialize this object as a hash
def to_json(*a)
instance_vars = Hash.new
self.instance_variables.each do |iv|
instance_vars[iv] = self.instance_variable_get(iv)
end
results = {
'json_class' => self.class.name,
'instance_vars' => instance_vars
}
results.to_json(*a)
end
def self.json_create(o)
collection = self.new()
o["instance_vars"].each do |k,v|
collection.instance_variable_set(k.to_sym, v)
end
collection
end
private
def find_resource_by_hash(arg)
results = Array.new
arg.each do |resource_name, name_list|
names = name_list.kind_of?(Array) ? name_list : [ name_list ]
names.each do |name|
res_name = "#{resource_name.to_s}[#{name}]"
results << lookup(res_name)
end
end
return results
end
def find_resource_by_string(arg)
results = Array.new
case arg
when /^(.+)\[(.+?),(.+)\]$/
resource_type = $1
arg =~ /^.+\[(.+)\]$/
resource_list = $1
resource_list.split(",").each do |name|
resource_name = "#{resource_type}[#{name}]"
results << lookup(resource_name)
end
when /^(.+)\[(.+)\]$/
resource_type = $1
name = $2
resource_name = "#{resource_type}[#{name}]"
results << lookup(resource_name)
else
raise ArgumentError, "You must have a string like resource_type[name]!"
end
return results
end
def is_chef_resource(arg)
unless arg.kind_of?(Chef::Resource)
raise ArgumentError, "Members must be Chef::Resource's"
end
true
end
end
end
|