Class: ChefDK::PolicyfileCompiler

Inherits:
Object
  • Object
show all
Extended by:
Forwardable
Defined in:
lib/chef-dk/policyfile_compiler.rb

Constant Summary collapse

DEFAULT_DEMAND_CONSTRAINT = 
">= 0.0.0".freeze
SOURCE_TYPES_WITH_FIXED_VERSIONS =

Cookbooks from these sources lock that cookbook to exactly one version

[:git, :path].freeze

Instance Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(ui: nil, chef_config: nil) ⇒ PolicyfileCompiler

Returns a new instance of PolicyfileCompiler.



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# File 'lib/chef-dk/policyfile_compiler.rb', line 62

def initialize(ui: nil, chef_config: nil)
  @storage_config = Policyfile::StorageConfig.new
  @dsl = Policyfile::DSL.new(storage_config, chef_config: chef_config)
  @artifact_server_cookbook_location_specs = {}

  @merged_graph = nil

  @ui = ui || UI.null
  @install_report = Policyfile::Reports::Install.new(ui: @ui, policyfile_compiler: self)
end

Instance Attribute Details

#dsl ⇒ Object (readonly)

Returns the value of attribute dsl.



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# File 'lib/chef-dk/policyfile_compiler.rb', line 58

def dsl
  @dsl
end

#install_report ⇒ Object (readonly)

Returns the value of attribute install_report.



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# File 'lib/chef-dk/policyfile_compiler.rb', line 60

def install_report
  @install_report
end

#storage_config ⇒ Object (readonly)

Returns the value of attribute storage_config.



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# File 'lib/chef-dk/policyfile_compiler.rb', line 59

def storage_config
  @storage_config
end

Class Method Details

.evaluate(policyfile_string, policyfile_filename, ui: nil, chef_config: nil) ⇒ Object 



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# File 'lib/chef-dk/policyfile_compiler.rb', line 44

def self.evaluate(policyfile_string, policyfile_filename, ui: nil, chef_config: nil)
  compiler = new(ui: ui, chef_config: chef_config)
  compiler.evaluate_policyfile(policyfile_string, policyfile_filename)
  compiler
end

Instance Method Details

#all_cookbook_location_specs ⇒ Object 



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# File 'lib/chef-dk/policyfile_compiler.rb', line 213

def all_cookbook_location_specs
  # in the installation process, we create "artifact_server_cookbook_location_specs"
  # for any cookbook that isn't sourced from a single-version source (e.g.,
  # path and git only support one version at a time), but we might have
  # specs for them to track additional version constraint demands. Merging
  # in this order ensures the artifact_server_cookbook_location_specs "win".
  cookbook_location_specs.merge(@artifact_server_cookbook_location_specs)
end

#artifacts_graph ⇒ Object 



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# File 'lib/chef-dk/policyfile_compiler.rb', line 265

def artifacts_graph
  remote_artifacts_graph.merge(local_artifacts_graph)
end

#build {|@dsl| ... } ⇒ Object

Yields:



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# File 'lib/chef-dk/policyfile_compiler.rb', line 341

def build
  yield @dsl
  self
end

#combined_run_lists ⇒ Object 



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# File 'lib/chef-dk/policyfile_compiler.rb', line 329

def combined_run_lists
  expanded_named_run_lists.values.inject(expanded_run_list.to_a) do |accum_run_lists, run_list|
    accum_run_lists | run_list.to_a
  end
end

#combined_run_lists_by_cb_name ⇒ Object 



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# File 'lib/chef-dk/policyfile_compiler.rb', line 335

def combined_run_lists_by_cb_name
  combined_run_lists.inject({}) do |by_name_accum, run_list_item|
    by_name_accum
  end
end

#cookbook_location_spec_for(cookbook_name) ⇒ Object 



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# File 'lib/chef-dk/policyfile_compiler.rb', line 92

def cookbook_location_spec_for(cookbook_name)
  cookbook_location_specs[cookbook_name]
end

#cookbook_version_fixed?(cookbook_name) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/chef-dk/policyfile_compiler.rb', line 316

def cookbook_version_fixed?(cookbook_name)
  if ( cookbook_location_spec = cookbook_location_spec_for(cookbook_name) )
    cookbook_location_spec.version_fixed?
  else
    false
  end
end

#cookbooks_in_run_list ⇒ Object 



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# File 'lib/chef-dk/policyfile_compiler.rb', line 324

def cookbooks_in_run_list
  recipes = combined_run_lists.map { |recipe| recipe.name }
  recipes.map { |r| r[/^([^:]+)/, 1] }
end

#create_spec_for_cookbook(cookbook_name, version) ⇒ Object 



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# File 'lib/chef-dk/policyfile_compiler.rb', line 206

def create_spec_for_cookbook(cookbook_name, version)
  matching_source = best_source_for(cookbook_name)
  source_options = matching_source.source_options_for(cookbook_name, version)
  spec = Policyfile::CookbookLocationSpecification.new(cookbook_name, "= #{version}", source_options, storage_config)
  @artifact_server_cookbook_location_specs[cookbook_name] = spec
end

#default_attributes ⇒ Object 



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# File 'lib/chef-dk/policyfile_compiler.rb', line 145

def default_attributes
  check_for_default_attribute_conflicts!
  included_policies.map { |p| p.policyfile_lock }.inject(
    dsl.node_attributes.combined_default.to_hash) do |acc, lock|
      Chef::Mixin::DeepMerge.merge(acc, lock.default_attributes)
    end
end

#default_source(source_type = nil, source_argument = nil, &block) ⇒ Object 



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# File 'lib/chef-dk/policyfile_compiler.rb', line 73

def default_source(source_type = nil, source_argument = nil, &block)
  if source_type.nil?
    prepend_array = if included_policies.length > 0
                      [included_policies_cookbook_source]
                    else
                      []
                    end
    prepend_array + dsl.default_source
  else
    dsl.default_source(source_type, source_argument, &block)
  end
end

#error! ⇒ Object 



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# File 'lib/chef-dk/policyfile_compiler.rb', line 86

def error!
  unless errors.empty?
    raise PolicyfileError, errors.join("\n")
  end
end

#evaluate_policyfile(policyfile_string, policyfile_filename) ⇒ Object 



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# File 'lib/chef-dk/policyfile_compiler.rb', line 346

def evaluate_policyfile(policyfile_string, policyfile_filename)
  storage_config.use_policyfile(policyfile_filename)
  @dsl.eval_policyfile(policyfile_string)
  self
end

#expanded_named_run_lists ⇒ Object 



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# File 'lib/chef-dk/policyfile_compiler.rb', line 116

def expanded_named_run_lists
  included_policies_named_runlists = included_policies.inject({}) do |acc, policy_spec|
    lock = policy_spec.policyfile_lock
    lock.named_run_lists.inject(acc) do |expanded, (name, run_list_items)|
      expanded[name] ||= Chef::RunList.new
      run_list_items.each do |run_list_item|
        expanded[name] << run_list_item
      end
      expanded
    end
    acc
  end

  named_run_lists.inject(included_policies_named_runlists) do |expanded, (name, run_list_items)|
    expanded[name] ||= Chef::RunList.new
    run_list_items.each do |run_list_item|
      expanded[name] << run_list_item
    end
    expanded
  end
end

#expanded_run_list ⇒ Object 



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# File 'lib/chef-dk/policyfile_compiler.rb', line 96

def expanded_run_list
  # doesn't support roles yet...
  concated_runlist = Chef::RunList.new
  included_policies.each do |policy_spec|
    lock = policy_spec.policyfile_lock
    lock.run_list.each do |run_list_item|
      concated_runlist << run_list_item
    end
  end
  run_list.each do |run_list_item|
    concated_runlist << run_list_item
  end
  concated_runlist
end

#fixed_version_cookbooks_specs ⇒ Object 



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# File 'lib/chef-dk/policyfile_compiler.rb', line 352

def fixed_version_cookbooks_specs
  @fixed_version_cookbooks_specs ||= cookbook_location_specs.select do |_cookbook_name, cookbook_location_spec|
    cookbook_location_spec.version_fixed?
  end
end

#graph ⇒ Object 



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# File 'lib/chef-dk/policyfile_compiler.rb', line 232

def graph
  @graph ||= Solve::Graph.new.tap do |g|
    artifacts_graph.each do |name, dependencies_by_version|
      dependencies_by_version.each do |version, dependencies|
        artifact = g.artifact(name, version)
        dependencies.each do |dep_name, constraint|
          artifact.dependency(dep_name, constraint)
        end
      end
    end
  end
end

#graph_demands ⇒ Object 



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# File 'lib/chef-dk/policyfile_compiler.rb', line 259

def graph_demands
  ## TODO: By merging cookbooks from the current policyfile and included policies,
  #        we lose the ability to know where a conflict came from
  (cookbook_demands_from_current + cookbook_demands_from_policies)
end

#graph_solution ⇒ Object

Compilation Methods



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# File 'lib/chef-dk/policyfile_compiler.rb', line 226

def graph_solution
  return @solution if @solution
  cache_fixed_version_cookbooks
  @solution = Solve.it!(graph, graph_demands)
end

#install ⇒ Object 



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# File 'lib/chef-dk/policyfile_compiler.rb', line 165

def install
  ensure_cache_dir_exists

  cookbook_and_recipe_list = combined_run_lists.map(&:name).map do |recipe_spec|
    cookbook, _separator, recipe = recipe_spec.partition("::")
    recipe = "default" if recipe.empty?
    [cookbook, recipe]
  end

  missing_recipes_by_cb_spec = {}

  graph_solution.each do |cookbook_name, version|
    spec = cookbook_location_spec_for(cookbook_name)
    if spec.nil? || !spec.version_fixed?
      spec = create_spec_for_cookbook(cookbook_name, version)
      install_report.installing_cookbook(spec)
      spec.ensure_cached
    end

    required_recipes = cookbook_and_recipe_list.select { |cb_name, _recipe| cb_name == spec.name }
    missing_recipes = required_recipes.select { |_cb_name, recipe| !spec.cookbook_has_recipe?(recipe) }

    unless missing_recipes.empty?
      missing_recipes_by_cb_spec[spec] = missing_recipes
    end
  end

  unless missing_recipes_by_cb_spec.empty?
    message = "The installed cookbooks do not contain all the recipes required by your run list(s):\n"
    missing_recipes_by_cb_spec.each do |spec, missing_items|
      message << "#{spec}\nis missing the following required recipes:\n"
      missing_items.each { |_cb, recipe| message << "* #{recipe}\n" }
    end

    message << "\n"
    message << "You may have specified an incorrect recipe in your run list,\nor this recipe may not be available in that version of the cookbook\n"

    raise CookbookDoesNotContainRequiredRecipe, message
  end
end

#local_artifacts_graph ⇒ Object

Gives a dependency graph for cookbooks that are source from an alternate location. These cookbooks could have a different set of dependencies compared to an unmodified copy upstream. For example, the community site may have a cookbook “apache2” at version “1.10.4”, which the user has forked on github and modified the dependencies without changing the version number. To accomodate this, the local_artifacts_graph should be merged over the upstream’s artifacts graph.



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# File 'lib/chef-dk/policyfile_compiler.rb', line 276

def local_artifacts_graph
  cookbook_location_specs.inject({}) do |local_artifacts, (cookbook_name, cookbook_location_spec)|
    if cookbook_location_spec.version_fixed?
      local_artifacts[cookbook_name] = { cookbook_location_spec.version => cookbook_location_spec.dependencies }
    end
    local_artifacts
  end
end

#lock ⇒ Object 



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# File 'lib/chef-dk/policyfile_compiler.rb', line 161

def lock
  @policyfile_lock ||= PolicyfileLock.build_from_compiler(self, storage_config)
end

#normalized_named_run_lists ⇒ Object 



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# File 'lib/chef-dk/policyfile_compiler.rb', line 138

def normalized_named_run_lists
  expanded_named_run_lists.inject({}) do |normalized, (name, run_list)|
    normalized[name] = run_list.map { |i| normalize_recipe(i) }
    normalized
  end
end

#normalized_run_list ⇒ Object

copy of the expanded_run_list, properly formatted for use in a lockfile



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# File 'lib/chef-dk/policyfile_compiler.rb', line 112

def normalized_run_list
  expanded_run_list.map { |i| normalize_recipe(i) }
end

#override_attributes ⇒ Object 



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# File 'lib/chef-dk/policyfile_compiler.rb', line 153

def override_attributes
  check_for_override_attribute_conflicts!
  included_policies.map { |p| p.policyfile_lock }.inject(
    dsl.node_attributes.combined_override.to_hash) do |acc, lock|
      Chef::Mixin::DeepMerge.merge(acc, lock.override_attributes)
    end
end

#remote_artifacts_graph ⇒ Object 



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# File 'lib/chef-dk/policyfile_compiler.rb', line 285

def remote_artifacts_graph
  @merged_graph ||=
    begin
      conflicting_cb_names = []
      merged = {}
      default_source.each do |source|
        merged.merge!(source.universe_graph) do |conflicting_cb_name, _old, _new|
          if (preference = preferred_source_for_cookbook(conflicting_cb_name))
            preference.universe_graph[conflicting_cb_name]
          elsif cookbook_could_appear_in_solution?(conflicting_cb_name)
            conflicting_cb_names << conflicting_cb_name
            {} # return empty set of versions
          else
            {} # return empty set of versions
          end
        end
      end
      handle_conflicting_cookbooks(conflicting_cb_names)
      merged
    end
end

#solution_dependencies ⇒ Object 



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# File 'lib/chef-dk/policyfile_compiler.rb', line 245

def solution_dependencies
  solution_deps = Policyfile::SolutionDependencies.new

  all_cookbook_location_specs.each do |name, spec|
    solution_deps.add_policyfile_dep(name, spec.version_constraint)
  end

  graph_solution.each do |name, version|
    transitive_deps = artifacts_graph[name][version]
    solution_deps.add_cookbook_dep(name, version, transitive_deps)
  end
  solution_deps
end

#version_constraint_for(cookbook_name) ⇒ Object 



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# File 'lib/chef-dk/policyfile_compiler.rb', line 307

def version_constraint_for(cookbook_name)
  if (cookbook_location_spec = cookbook_location_spec_for(cookbook_name)) && cookbook_location_spec.version_fixed?
    version = cookbook_location_spec.version
    "= #{version}"
  else
    DEFAULT_DEMAND_CONSTRAINT
  end
end