summaryrefslogtreecommitdiff
path: root/lib/chef/cookbook_version.rb
blob: 8de9cb26dd423b7401b5202174348c153e7050d3 (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
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
# Author:: Adam Jacob (<adam@chef.io>)
# Author:: Nuo Yan (<nuo@chef.io>)
# Author:: Christopher Walters (<cw@chef.io>)
# Author:: Tim Hinderliter (<tim@chef.io>)
# Author:: Seth Falcon (<seth@chef.io>)
# Author:: Daniel DeLeo (<dan@chef.io>)
# Copyright:: Copyright 2008-2016, Chef Software, 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/log"
require "chef/cookbook/file_vendor"
require "chef/cookbook/metadata"
require "chef/version_class"
require "chef/digester"
require "chef/cookbook_manifest"
require "chef/server_api"

class Chef

  # == Chef::CookbookVersion
  # CookbookVersion is a model object encapsulating the data about a Chef
  # cookbook. Chef supports maintaining multiple versions of a cookbook on a
  # single server; each version is represented by a distinct instance of this
  # class.
  class CookbookVersion

    include Comparable

    COOKBOOK_SEGMENTS = [ :resources, :providers, :recipes, :definitions, :libraries, :attributes, :files, :templates, :root_files ]

    attr_accessor :all_files

    attr_accessor :root_paths
    attr_accessor :definition_filenames
    attr_accessor :template_filenames
    attr_accessor :file_filenames
    attr_accessor :library_filenames
    attr_accessor :resource_filenames
    attr_accessor :provider_filenames
    attr_accessor :root_filenames
    attr_accessor :name
    attr_accessor :metadata_filenames

    def status=(new_status)
      Chef.log_deprecation("Deprecated method `status' called. This method will be removed.")
      @status = new_status
    end

    def status
      Chef.log_deprecation("Deprecated method `status' called. This method will be removed.")
      @status
    end

    # A Chef::Cookbook::Metadata object. It has a setter that fixes up the
    # metadata to add descriptions of the recipes contained in this
    # CookbookVersion.
    attr_reader :metadata

    # attribute_filenames also has a setter that has non-default
    # functionality.
    attr_reader :attribute_filenames

    # recipe_filenames also has a setter that has non-default
    # functionality.
    attr_reader :recipe_filenames

    attr_reader :recipe_filenames_by_name
    attr_reader :attribute_filenames_by_short_filename

    attr_accessor :chef_server_rest

    # The `identifier` field is used for cookbook_artifacts, which are
    # organized on the chef server according to their content. If the
    # policy_mode option to CookbookManifest is set to true it will include
    # this field in the manifest Hash and in the upload URL.
    #
    # This field may be removed or have different behavior in the future, don't
    # use it in 3rd party code.
    # @api private
    attr_accessor :identifier

    # The first root path is the primary cookbook dir, from which metadata is loaded
    def root_dir
      root_paths[0]
    end

    # This is the one and only method that knows how cookbook files'
    # checksums are generated.
    def self.checksum_cookbook_file(filepath)
      Chef::Digester.generate_md5_checksum_for_file(filepath)
    rescue Errno::ENOENT
      Chef::Log.debug("File #{filepath} does not exist, so there is no checksum to generate")
      nil
    end

    def self.cache
      Chef::FileCache
    end

    # Creates a new Chef::CookbookVersion object.
    #
    # === Returns
    # object<Chef::CookbookVersion>:: Duh. :)
    def initialize(name, *root_paths, chef_server_rest: nil)
      @name = name
      @root_paths = root_paths
      @frozen = false

      @attribute_filenames = Array.new
      @definition_filenames = Array.new
      @template_filenames = Array.new
      @file_filenames = Array.new
      @recipe_filenames = Array.new
      @recipe_filenames_by_name = Hash.new
      @library_filenames = Array.new
      @resource_filenames = Array.new
      @provider_filenames = Array.new
      @metadata_filenames = Array.new
      @root_filenames = Array.new

      @all_files = Array.new

      # deprecated
      @status = :ready
      @file_vendor = nil
      @metadata = Chef::Cookbook::Metadata.new
      @chef_server_rest = chef_server_rest
    end

    def version
      metadata.version
    end

    # Indicates if this version is frozen or not. Freezing a coobkook version
    # indicates that a new cookbook with the same name and version number
    # shoule
    def frozen_version?
      @frozen
    end

    def freeze_version
      @frozen = true
    end

    def version=(new_version)
      cookbook_manifest.reset!
      metadata.version(new_version)
    end

    def full_name
      "#{name}-#{version}"
    end

    def attribute_filenames=(*filenames)
      @attribute_filenames = filenames.flatten
      @attribute_filenames_by_short_filename = filenames_by_name(attribute_filenames)
      attribute_filenames
    end

    def metadata=(metadata)
      @metadata = metadata
      @metadata.recipes_from_cookbook_version(self)
      @metadata
    end

    ## BACKCOMPAT/DEPRECATED - Remove these and fix breakage before release [DAN - 5/20/2010]##
    alias :attribute_files :attribute_filenames
    alias :attribute_files= :attribute_filenames=

    def manifest
      cookbook_manifest.manifest
    end

    # Returns a hash of checksums to either nil or the on disk path (which is
    # done by generate_manifest).
    def checksums
      cookbook_manifest.checksums
    end

    def manifest_records_by_path
      cookbook_manifest.manifest_records_by_path
    end

    def manifest=(new_manifest)
      cookbook_manifest.update_from(new_manifest)
    end

    # Return recipe names in the form of cookbook_name::recipe_name
    def fully_qualified_recipe_names
      results = Array.new
      recipe_filenames_by_name.each_key do |rname|
        results << "#{name}::#{rname}"
      end
      results
    end

    def recipe_filenames=(*filenames)
      @recipe_filenames = filenames.flatten
      @recipe_filenames_by_name = filenames_by_name(recipe_filenames)
      recipe_filenames
    end

    ## BACKCOMPAT/DEPRECATED - Remove these and fix breakage before release [DAN - 5/20/2010]##
    alias :recipe_files :recipe_filenames
    alias :recipe_files= :recipe_filenames=

    # called from DSL
    def load_recipe(recipe_name, run_context)
      unless recipe_filenames_by_name.has_key?(recipe_name)
        raise Chef::Exceptions::RecipeNotFound, "could not find recipe #{recipe_name} for cookbook #{name}"
      end

      Chef::Log.debug("Found recipe #{recipe_name} in cookbook #{name}")
      recipe = Chef::Recipe.new(name, recipe_name, run_context)
      recipe_filename = recipe_filenames_by_name[recipe_name]

      unless recipe_filename
        raise Chef::Exceptions::RecipeNotFound, "could not find #{recipe_name} files for cookbook #{name}"
      end

      recipe.from_file(recipe_filename)
      recipe
    end

    def segment_filenames(segment)
      unless COOKBOOK_SEGMENTS.include?(segment)
        raise ArgumentError, "invalid segment #{segment}: must be one of #{COOKBOOK_SEGMENTS.join(', ')}"
      end

      case segment.to_sym
      when :resources
        @resource_filenames
      when :providers
        @provider_filenames
      when :recipes
        @recipe_filenames
      when :libraries
        @library_filenames
      when :definitions
        @definition_filenames
      when :attributes
        @attribute_filenames
      when :files
        @file_filenames
      when :templates
        @template_filenames
      when :root_files
        @root_filenames
      end
    end

    def replace_segment_filenames(segment, filenames)
      case segment.to_sym
      when :recipes
        self.recipe_filenames = filenames
      when :attributes
        self.attribute_filenames = filenames
      else
        segment_filenames(segment).replace(filenames)
      end
    end

    # Query whether a template file +template_filename+ is available. File
    # specificity for the given +node+ is obeyed in the lookup.
    def has_template_for_node?(node, template_filename)
      !!find_preferred_manifest_record(node, :templates, template_filename)
    end

    # Query whether a cookbook_file file +cookbook_filename+ is available. File
    # specificity for the given +node+ is obeyed in the lookup.
    def has_cookbook_file_for_node?(node, cookbook_filename)
      !!find_preferred_manifest_record(node, :files, cookbook_filename)
    end

    # Determine the most specific manifest record for the given
    # segment/filename, given information in the node. Throws
    # FileNotFound if there is no such segment and filename in the
    # manifest.
    #
    # A manifest record is a Mash that follows the following form:
    # {
    #   :name => "example.rb",
    #   :path => "files/default/example.rb",
    #   :specificity => "default",
    #   :checksum => "1234"
    # }
    def preferred_manifest_record(node, segment, filename)
      found_pref = find_preferred_manifest_record(node, segment, filename)
      if found_pref
        manifest_records_by_path[found_pref]
      else
        if segment == :files || segment == :templates
          error_message = "Cookbook '#{name}' (#{version}) does not contain a file at any of these locations:\n"
          error_locations = if filename.is_a?(Array)
                              filename.map { |name| "  #{File.join(segment.to_s, name)}" }
                            else
                              [
                                "  #{segment}/#{node[:platform]}-#{node[:platform_version]}/#{filename}",
                                "  #{segment}/#{node[:platform]}/#{filename}",
                                "  #{segment}/default/#{filename}",
                                "  #{segment}/#{filename}",
                              ]
                            end
          error_message << error_locations.join("\n")
          existing_files = segment_filenames(segment)
          # Strip the root_dir prefix off all files for readability
          pretty_existing_files = existing_files.map do |path|
            if root_dir
              path[root_dir.length + 1..-1]
            else
              path
            end
          end
          # Show the files that the cookbook does have. If the user made a typo,
          # hopefully they'll see it here.
          unless pretty_existing_files.empty?
            error_message << "\n\nThis cookbook _does_ contain: ['#{pretty_existing_files.join("','")}']"
          end
          raise Chef::Exceptions::FileNotFound, error_message
        else
          raise Chef::Exceptions::FileNotFound, "cookbook #{name} does not contain file #{segment}/#{filename}"
        end
      end
    end

    def preferred_filename_on_disk_location(node, segment, filename, current_filepath = nil)
      manifest_record = preferred_manifest_record(node, segment, filename)
      if current_filepath && (manifest_record["checksum"] == self.class.checksum_cookbook_file(current_filepath))
        nil
      else
        file_vendor.get_filename(manifest_record["path"])
      end
    end

    def relative_filenames_in_preferred_directory(node, segment, dirname)
      preferences = preferences_for_path(node, segment, dirname)
      filenames_by_pref = Hash.new
      preferences.each { |pref| filenames_by_pref[pref] = Array.new }

      manifest[segment].each do |manifest_record|
        manifest_record_path = manifest_record[:path]

        # find the NON SPECIFIC filenames, but prefer them by filespecificity.
        # For example, if we have a file:
        # 'files/default/somedir/somefile.conf' we only keep
        # 'somedir/somefile.conf'. If there is also
        # 'files/$hostspecific/somedir/otherfiles' that matches the requested
        # hostname specificity, that directory will win, as it is more specific.
        #
        # This is clearly ugly b/c the use case is for remote directory, where
        # we're just going to make cookbook_files out of these and make the
        # cookbook find them by filespecificity again. but it's the shortest
        # path to "success" for now.
        if manifest_record_path =~ /(#{Regexp.escape(segment.to_s)}\/[^\/]+\/#{Regexp.escape(dirname)})\/.+$/
          specificity_dirname = $1
          non_specific_path = manifest_record_path[/#{Regexp.escape(segment.to_s)}\/[^\/]+\/#{Regexp.escape(dirname)}\/(.+)$/, 1]
          # Record the specificity_dirname only if it's in the list of
          # valid preferences
          if filenames_by_pref[specificity_dirname]
            filenames_by_pref[specificity_dirname] << non_specific_path
          end
        end
      end

      best_pref = preferences.find { |pref| !filenames_by_pref[pref].empty? }

      raise Chef::Exceptions::FileNotFound, "cookbook #{name} has no directory #{segment}/default/#{dirname}" unless best_pref

      filenames_by_pref[best_pref]
    end

    # Determine the manifest records from the most specific directory
    # for the given node. See #preferred_manifest_record for a
    # description of entries of the returned Array.
    def preferred_manifest_records_for_directory(node, segment, dirname)
      preferences = preferences_for_path(node, segment, dirname)
      records_by_pref = Hash.new
      preferences.each { |pref| records_by_pref[pref] = Array.new }

      manifest[segment].each do |manifest_record|
        manifest_record_path = manifest_record[:path]

        # extract the preference part from the path.
        if manifest_record_path =~ /(#{Regexp.escape(segment.to_s)}\/[^\/]+\/#{Regexp.escape(dirname)})\/.+$/
            # Note the specificy_dirname includes the segment and
            # dirname argument as above, which is what
            # preferences_for_path returns. It could be
            # "files/ubuntu-9.10/dirname", for example.
          specificity_dirname = $1

          # Record the specificity_dirname only if it's in the list of
          # valid preferences
          if records_by_pref[specificity_dirname]
            records_by_pref[specificity_dirname] << manifest_record
          end
        end
      end

      best_pref = preferences.find { |pref| !records_by_pref[pref].empty? }

      raise Chef::Exceptions::FileNotFound, "cookbook #{name} (#{version}) has no directory #{segment}/default/#{dirname}" unless best_pref

      records_by_pref[best_pref]
    end

    # Given a node, segment and path (filename or directory name),
    # return the priority-ordered list of preference locations to
    # look.
    def preferences_for_path(node, segment, path)
      # only files and templates can be platform-specific
      if segment.to_sym == :files || segment.to_sym == :templates
        relative_search_path = if path.is_a?(Array)
                                 path
                               else
                                 begin
                                   platform, version = Chef::Platform.find_platform_and_version(node)
                                 rescue ArgumentError => e
                                   # Skip platform/version if they were not found by find_platform_and_version
                                   if e.message =~ /Cannot find a (?:platform|version)/
                                     platform = "/unknown_platform/"
                                     version = "/unknown_platform_version/"
                                   else
                                     raise
                                   end
                                 end

                                 fqdn = node[:fqdn]

                                 # Break version into components, eg: "5.7.1" => [ "5.7.1", "5.7", "5" ]
                                 search_versions = []
                                 parts = version.to_s.split(".")

                                 parts.size.times do
                                   search_versions << parts.join(".")
                                   parts.pop
                                 end

                                 # Most specific to least specific places to find the path
                                 search_path = [ File.join("host-#{fqdn}", path) ]
                                 search_versions.each do |v|
                                   search_path << File.join("#{platform}-#{v}", path)
                                 end
                                 search_path << File.join(platform.to_s, path)
                                 search_path << File.join("default", path)
                                 search_path << path

                                 search_path
                               end
        relative_search_path.map { |relative_path| File.join(segment.to_s, relative_path) }
      else
        if segment.to_sym == :root_files
          [path]
        else
          [File.join(segment, path)]
        end
      end
    end
    private :preferences_for_path

    def self.from_hash(o)
      cookbook_version = new(o["cookbook_name"] || o["name"])

      # We want the Chef::Cookbook::Metadata object to always be inflated
      cookbook_version.metadata = Chef::Cookbook::Metadata.from_hash(o["metadata"])
      cookbook_version.manifest = o
      cookbook_version.identifier = o["identifier"] if o.key?("identifier")

      # We don't need the following step when we decide to stop supporting deprecated operators in the metadata (e.g. <<, >>)
      cookbook_version.manifest["metadata"] = Chef::JSONCompat.from_json(Chef::JSONCompat.to_json(cookbook_version.metadata))

      cookbook_version.freeze_version if o["frozen?"]
      cookbook_version
    end

    def self.json_create(o)
      Chef.log_deprecation("Auto inflation of JSON data is deprecated. Please use Chef::CookbookVersion#from_hash")
      from_hash(o)
    end

    def self.from_cb_artifact_data(o)
      from_hash(o)
    end

    # @deprecated This method was used by the Ruby Chef Server and is no longer
    #   needed. There is no replacement.
    def generate_manifest_with_urls
      Chef.log_deprecation("Deprecated method #generate_manifest_with_urls.")

      rendered_manifest = manifest.dup
      COOKBOOK_SEGMENTS.each do |segment|
        if rendered_manifest.has_key?(segment)
          rendered_manifest[segment].each do |manifest_record|
            url_options = { :cookbook_name => name.to_s, :cookbook_version => version, :checksum => manifest_record["checksum"] }
            manifest_record["url"] = yield(url_options)
          end
        end
      end
      rendered_manifest
    end

    def to_hash
      # TODO: this should become deprecated when the API for CookbookManifest becomes stable
      cookbook_manifest.to_hash
    end

    def to_json(*a)
      # TODO: this should become deprecated when the API for CookbookManifest becomes stable
      cookbook_manifest.to_json
    end

    def metadata_json_file
      File.join(root_paths[0], "metadata.json")
    end

    def metadata_rb_file
      File.join(root_paths[0], "metadata.rb")
    end

    def reload_metadata!
      if File.exists?(metadata_json_file)
        metadata.from_json(IO.read(metadata_json_file))
      end
    end

    ##
    # REST API
    ##

    def save_url
      # TODO: this should become deprecated when the API for CookbookManifest becomes stable
      cookbook_manifest.save_url
    end

    def force_save_url
      # TODO: this should become deprecated when the API for CookbookManifest becomes stable
      cookbook_manifest.force_save_url
    end

    def chef_server_rest
      @chef_server_rest ||= self.chef_server_rest
    end

    def self.chef_server_rest
      Chef::ServerAPI.new(Chef::Config[:chef_server_url])
    end

    def destroy
      chef_server_rest.delete("cookbooks/#{name}/#{version}")
      self
    end

    def self.load(name, version = "_latest")
      version = "_latest" if version == "latest"
      from_hash(chef_server_rest.get("cookbooks/#{name}/#{version}"))
    end

    # The API returns only a single version of each cookbook in the result from the cookbooks method
    def self.list
      chef_server_rest.get("cookbooks")
    end

    # Alias latest_cookbooks as list
    class << self
      alias :latest_cookbooks :list
    end

    def self.list_all_versions
      chef_server_rest.get("cookbooks?num_versions=all")
    end

    ##
    # Given a +cookbook_name+, get a list of all versions that exist on the
    # server.
    # ===Returns
    # [String]::  Array of cookbook versions, which are strings like 'x.y.z'
    # nil::       if the cookbook doesn't exist. an error will also be logged.
    def self.available_versions(cookbook_name)
      chef_server_rest.get("cookbooks/#{cookbook_name}")[cookbook_name]["versions"].map do |cb|
        cb["version"]
      end
    rescue Net::HTTPServerException => e
      if e.to_s =~ /^404/
        Chef::Log.error("Cannot find a cookbook named #{cookbook_name}")
        nil
      else
        raise
      end
    end

    def <=>(other)
      raise Chef::Exceptions::CookbookVersionNameMismatch if self.name != other.name
      # FIXME: can we change the interface to the Metadata class such
      # that metadata.version returns a Chef::Version instance instead
      # of a string?
      Chef::Version.new(self.version) <=> Chef::Version.new(other.version)
    end

    private

    def cookbook_manifest
      @cookbook_manifest ||= CookbookManifest.new(self)
    end

    def find_preferred_manifest_record(node, segment, filename)
      preferences = preferences_for_path(node, segment, filename)

      # in order of prefernce, look for the filename in the manifest
      preferences.find { |preferred_filename| manifest_records_by_path[preferred_filename] }
    end

    # For each filename, produce a mapping of base filename (i.e. recipe name
    # or attribute file) to on disk location
    def filenames_by_name(filenames)
      filenames.select { |filename| filename =~ /\.rb$/ }.inject({}) { |memo, filename| memo[File.basename(filename, ".rb")] = filename; memo }
    end

    def file_vendor
      unless @file_vendor
        @file_vendor = Chef::Cookbook::FileVendor.create_from_manifest(manifest)
      end
      @file_vendor
    end

  end
end