summaryrefslogtreecommitdiff
path: root/lib/chef/cookbook_manifest.rb
blob: 27daf287a1abab179041f5f181192440dbc0aa64 (plain)
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
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
# Author:: Daniel DeLeo (<dan@chef.io>)
# Copyright:: Copyright 2015 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 'forwardable'
require 'chef/util/path_helper'
require 'chef/log'

class Chef

  # Handles the details of representing a cookbook in JSON form for uploading
  # to a Chef Server.
  class CookbookManifest

    # Duplicates the same constant in CookbookVersion. We cannot remove it
    # there because it is treated by other code as part of CookbookVersion's
    # public API (also used in some deprecated methods).
    COOKBOOK_SEGMENTS = [ :resources, :providers, :recipes, :definitions, :libraries, :attributes, :files, :templates, :root_files ].freeze

    extend Forwardable

    attr_reader :cookbook_version

    def_delegator :@cookbook_version, :root_paths
    def_delegator :@cookbook_version, :segment_filenames
    def_delegator :@cookbook_version, :name
    def_delegator :@cookbook_version, :identifier
    def_delegator :@cookbook_version, :metadata
    def_delegator :@cookbook_version, :full_name
    def_delegator :@cookbook_version, :version
    def_delegator :@cookbook_version, :frozen_version?

    # Create a new CookbookManifest object for the given `cookbook_version`.
    # You can subsequently call #to_hash to get a Hash representation of the
    # cookbook_version in the "manifest" format, or #to_json to get a JSON
    # representation of the cookbook_version.
    #
    # The inferface for this behavior is expected to change as we implement new
    # manifest formats. The entire class should be considered a private API for
    # now.
    #
    # @api private
    # @param policy_mode [Boolean] whether to convert cookbooks to Hash/JSON in
    #   the format used by the `cookbook_artifacts` endpoint (for policyfiles).
    #   Setting this option also changes the behavior of #save_url and
    #   #force_save_url such that CookbookVersions will be uploaded to the new
    #   `cookbook_artifacts` API. This endpoint is currently under active
    #   development and the format is expected to change frequently, therefore
    #   the result of #manifest, #to_hash, and #to_json will not be stable when
    #   `policy_mode` is enabled.
    def initialize(cookbook_version, policy_mode: false)
      @cookbook_version = cookbook_version
      @policy_mode = !!policy_mode

      reset!
    end

    # Resets all lazily computed values.
    def reset!
      @manifest = nil
      @checksums = nil
      @manifest_records_by_path = nil
      true
    end

    # Returns a 'manifest' data structure that can be uploaded to a Chef
    # Server.
    #
    # The format is as follows:
    #
    #     {
    #       :cookbook_name  => name,            # String
    #       :metadata       => metadata,        # Chef::Cookbook::Metadata
    #       :version        => version,         # Chef::Version
    #       :name           => full_name,       # String of "#{name}-#{version}"
    #
    #       :recipes        => Array<FileSpec>,
    #       :definitions    => Array<FileSpec>,
    #       :libraries      => Array<FileSpec>,
    #       :attributes     => Array<FileSpec>,
    #       :files          => Array<FileSpec>,
    #       :templates      => Array<FileSpec>,
    #       :resources      => Array<FileSpec>,
    #       :providers      => Array<FileSpec>,
    #       :root_files     => Array<FileSpec>
    #     }
    #
    # Where a `FileSpec` is a Hash of the form:
    #
    #     {
    #       :name         => file_name,
    #       :path         => path,
    #       :checksum     => csum,
    #       :specificity  => specificity
    #     }
    #
    def manifest
      @manifest || generate_manifest
      @manifest
    end

    def checksums
      @manifest || generate_manifest
      @checksums
    end

    def manifest_records_by_path
      @manifest || generate_manifest
      @manifest_records_by_path
    end

    def policy_mode?
      @policy_mode
    end

    def to_hash
      result = manifest.dup
      result['frozen?'] = frozen_version?
      result['chef_type'] = 'cookbook_version'
      result.to_hash
    end

    def to_json(*a)
      result = to_hash
      result['json_class'] = "Chef::CookbookVersion"
      Chef::JSONCompat.to_json(result, *a)
    end

    # Return the URL to save (PUT) this object to the server via the
    # REST api. If there is an existing document on the server and it
    # is marked frozen, a PUT will result in a 409 Conflict.
    def save_url
      if policy_mode?
        "#{named_cookbook_url}/#{identifier}"
      else
        "#{named_cookbook_url}/#{version}"
      end
    end

    def named_cookbook_url
      "#{cookbook_url_path}/#{name}"
    end
    # Adds the `force=true` parameter to the upload URL. This allows
    # the user to overwrite a frozen cookbook (a PUT against the
    # normal #save_url raises a 409 Conflict in this case).
    def force_save_url
      "#{save_url}?force=true"
    end

    # Update this CookbookManifest from the contents of another manifest, and
    # make the corresponding changes to the cookbook_version object. Required
    # to provide backward compatibility with CookbookVersion#manifest= method.
    def update_from(new_manifest)
      @manifest = Mash.new new_manifest
      @checksums = extract_checksums_from_manifest(@manifest)
      @manifest_records_by_path = extract_manifest_records_by_path(@manifest)

      COOKBOOK_SEGMENTS.each do |segment|
        next unless @manifest.has_key?(segment)
        filenames = @manifest[segment].map{|manifest_record| manifest_record['name']}

        cookbook_version.replace_segment_filenames(segment, filenames)
      end
    end

    private

    def cookbook_url_path
      policy_mode? ? "cookbook_artifacts" : "cookbooks"
    end

    # See #manifest for a description of the manifest return value.
    # See #preferred_manifest_record for a description an individual manifest record.
    def generate_manifest
      manifest = Mash.new({
        :recipes => Array.new,
        :definitions => Array.new,
        :libraries => Array.new,
        :attributes => Array.new,
        :files => Array.new,
        :templates => Array.new,
        :resources => Array.new,
        :providers => Array.new,
        :root_files => Array.new,
      },)
      @checksums = {}

      if !root_paths || root_paths.size == 0
        Chef::Log.error("Cookbook #{name} does not have root_paths! Cannot generate manifest.")
        raise "Cookbook #{name} does not have root_paths! Cannot generate manifest."
      end

      COOKBOOK_SEGMENTS.each do |segment|
        segment_filenames(segment).each do |segment_file|
          next if File.directory?(segment_file)

          path, specificity = parse_segment_file_from_root_paths(segment, segment_file)
          file_name = File.basename(path)

          csum = checksum_cookbook_file(segment_file)
          @checksums[csum] = segment_file
          rs = Mash.new({
            :name => file_name,
            :path => path,
            :checksum => csum,
            :specificity => specificity,
          },)

          manifest[segment] << rs
        end
      end

      manifest[:metadata] = metadata
      manifest[:version] = metadata.version

      if policy_mode?
        manifest[:name] = name.to_s
        manifest[:identifier] = identifier
      else
        manifest[:name] = full_name
        manifest[:cookbook_name] = name.to_s
      end

      @manifest_records_by_path = extract_manifest_records_by_path(manifest)
      @manifest = manifest
    end

    def parse_segment_file_from_root_paths(segment, segment_file)
      root_paths.each do |root_path|
        pathname = Chef::Util::PathHelper.relative_path_from(root_path, segment_file)

        parts = pathname.each_filename.take(2)
        # Check if path is actually under root_path
        next if parts[0] == '..'
        if segment == :templates || segment == :files
          # Check if pathname looks like files/foo or templates/foo (unscoped)
          if pathname.each_filename.to_a.length == 2
            # Use root_default in case the same path exists at root_default and default
            return [ pathname.to_s, 'root_default' ]
          else
            return [ pathname.to_s, parts[1] ]
          end
        else
          return [ pathname.to_s, 'default' ]
        end
      end
      Chef::Log.error("Cookbook file #{segment_file} not under cookbook root paths #{root_paths.inspect}.")
      raise "Cookbook file #{segment_file} not under cookbook root paths #{root_paths.inspect}."
    end

    def extract_checksums_from_manifest(manifest)
      checksums = {}
      COOKBOOK_SEGMENTS.each do |segment|
        next unless manifest.has_key?(segment)
        manifest[segment].each do |manifest_record|
          checksums[manifest_record[:checksum]] = nil
        end
      end
      checksums
    end

    def checksum_cookbook_file(filepath)
      CookbookVersion.checksum_cookbook_file(filepath)
    end

    def extract_manifest_records_by_path(manifest)
      manifest_records_by_path = {}
      COOKBOOK_SEGMENTS.each do |segment|
        next unless manifest.has_key?(segment)
        manifest[segment].each do |manifest_record|
          manifest_records_by_path[manifest_record[:path]] = manifest_record
        end
      end
      manifest_records_by_path
    end
  end
end