# class Bundler::Definition

### Attributes

dependencies[R]
gemfiles[R]
locked_deps[R]
locked_gems[R]
lockfile[R]
platforms[R]
requires[R]
ruby_version[R]
sources[R]

### Public Class Methods

build(gemfile, lockfile, unlock) click to toggle source

Given a gemfile and lockfile creates a `Bundler` definition

@param gemfile [Pathname] Path to Gemfile @param lockfile [Pathname,nil] Path to Gemfile.lock @param unlock [Hash, Boolean, nil] Gems that have been requested

    to be updated or true if all gems should be updated

@return [Bundler::Definition]

    # File lib/bundler/definition.rb, line 28
    def self.build(gemfile, lockfile, unlock)
      unlock ||= {}
      gemfile = Pathname.new(gemfile).expand_path

      raise GemfileNotFound, "#{gemfile} not found" unless gemfile.file?

      Dsl.evaluate(gemfile, lockfile, unlock)
    end

new(lockfile, dependencies, sources, unlock, ruby_version = nil, optional_groups = [], gemfiles = []) click to toggle source

How does the new system work?

- Load information from Gemfile and Lockfile

- Invalidate stale locked specs

- All specs from stale source are stale

- All specs that are reachable only through a stale dependency are stale.

- If all fresh dependencies are satisfied by the locked

    specs, then we can try to resolve locally.

@param lockfile [Pathname] Path to Gemfile.lock @param dependencies [Array(Bundler::Dependency)] array of dependencies from Gemfile @param sources [Bundler::SourceList] @param unlock [Hash, Boolean, nil] Gems that have been requested

    to be updated or true if all gems should be updated

@param `ruby_version` [Bundler::RubyVersion, nil] Requested Ruby Version @param optional_groups [Array(String)] A list of optional groups

    # File lib/bundler/definition.rb, line 55
    def initialize(lockfile, dependencies, sources, unlock, ruby_version = nil, optional_groups = [], gemfiles = [])
      if [true, false].include?(unlock)
        @unlocking_bundler = false
        @unlocking = unlock
      else
        unlock = unlock.dup
        @unlocking_bundler = unlock.delete(:bundler)
        unlock.delete_if {|_k, v| Array(v).empty? }
        @unlocking = !unlock.empty?
      end

      @dependencies    = dependencies
      @sources         = sources
      @unlock          = unlock
      @optional_groups = optional_groups
      @remote          = false
      @specs           = nil
      @ruby_version    = ruby_version
      @gemfiles        = gemfiles

      @lockfile               = lockfile
      @lockfile_contents      = String.new
      @locked_bundler_version = nil
      @locked_ruby_version    = nil
      @locked_specs_incomplete_for_platform = false

      if lockfile && File.exist?(lockfile)
        @lockfile_contents = Bundler.read_file(lockfile)
        @locked_gems = LockfileParser.new(@lockfile_contents)
        @locked_platforms = @locked_gems.platforms
        @platforms = @locked_platforms.dup
        @locked_bundler_version = @locked_gems.bundler_version
        @locked_ruby_version = @locked_gems.ruby_version

        if unlock != true
          @locked_deps    = @locked_gems.dependencies
          @locked_specs   = SpecSet.new(@locked_gems.specs)
          @locked_sources = @locked_gems.sources
        else
          @unlock         = {}
          @locked_deps    = {}
          @locked_specs   = SpecSet.new([])
          @locked_sources = []
        end
      else
        @unlock         = {}
        @platforms      = []
        @locked_gems    = nil
        @locked_deps    = {}
        @locked_specs   = SpecSet.new([])
        @locked_sources = []
        @locked_platforms = []
      end

      @unlock[:gems] ||= []
      @unlock[:sources] ||= []
      @unlock[:ruby] ||= if @ruby_version && locked_ruby_version_object
        @ruby_version.diff(locked_ruby_version_object)
      end
      @unlocking ||= @unlock[:ruby] ||= (!@locked_ruby_version ^ !@ruby_version)

      add_current_platform unless Bundler.frozen_bundle?

      converge_path_sources_to_gemspec_sources
      @path_changes = converge_paths
      @source_changes = converge_sources

      unless @unlock[:lock_shared_dependencies]
        eager_unlock = expand_dependencies(@unlock[:gems], true)
        @unlock[:gems] = @locked_specs.for(eager_unlock, [], false, false, false).map(&:name)
      end

      @dependency_changes = converge_dependencies
      @local_changes = converge_locals

      @requires = compute_requires
    end

### Public Instance Methods

add_current_platform() click to toggle source

    # File lib/bundler/definition.rb, line 521
    def add_current_platform
      current_platform = Bundler.local_platform
      add_platform(current_platform) if Bundler.feature_flag.specific_platform?
      add_platform(generic(current_platform))
    end

add_platform(platform) click to toggle source

    # File lib/bundler/definition.rb, line 511
    def add_platform(platform)
      @new_platform ||= !@platforms.include?(platform)
      @platforms |= [platform]
    end

current_dependencies() click to toggle source

    # File lib/bundler/definition.rb, line 230
    def current_dependencies
      dependencies.select(&:should_include?)
    end

ensure_equivalent_gemfile_and_lockfile(explicit_flag = false) click to toggle source

    # File lib/bundler/definition.rb, line 392
    def ensure_equivalent_gemfile_and_lockfile(explicit_flag = false)
      msg = String.new
      msg << "You are trying to install in deployment mode after changing\n" \
             "your Gemfile. Run `bundle install` elsewhere and add the\n" \
             "updated #{Bundler.default_lockfile.relative_path_from(SharedHelpers.pwd)} to version control."

      unless explicit_flag
        suggested_command = if Bundler.settings.locations("frozen")[:global]
          "bundle config --delete frozen"
        elsif Bundler.settings.locations("deployment").keys.&([:global, :local]).any?
          "bundle config --delete deployment"
        else
          "bundle install --no-deployment"
        end
        msg << "\n\nIf this is a development machine, remove the #{Bundler.default_gemfile} " \
               "freeze \nby running `#{suggested_command}`."
      end

      added =   []
      deleted = []
      changed = []

      new_platforms = @platforms - @locked_platforms
      deleted_platforms = @locked_platforms - @platforms
      added.concat new_platforms.map {|p| "* platform: #{p}" }
      deleted.concat deleted_platforms.map {|p| "* platform: #{p}" }

      gemfile_sources = sources.lock_sources

      new_sources = gemfile_sources - @locked_sources
      deleted_sources = @locked_sources - gemfile_sources

      new_deps = @dependencies - @locked_deps.values
      deleted_deps = @locked_deps.values - @dependencies

      # Check if it is possible that the source is only changed thing
      if (new_deps.empty? && deleted_deps.empty?) && (!new_sources.empty? && !deleted_sources.empty?)
        new_sources.reject! {|source| (source.path? && source.path.exist?) || equivalent_rubygems_remotes?(source) }
        deleted_sources.reject! {|source| (source.path? && source.path.exist?) || equivalent_rubygems_remotes?(source) }
      end

      if @locked_sources != gemfile_sources
        if new_sources.any?
          added.concat new_sources.map {|source| "* source: #{source}" }
        end

        if deleted_sources.any?
          deleted.concat deleted_sources.map {|source| "* source: #{source}" }
        end
      end

      added.concat new_deps.map {|d| "* #{pretty_dep(d)}" } if new_deps.any?
      if deleted_deps.any?
        deleted.concat deleted_deps.map {|d| "* #{pretty_dep(d)}" }
      end

      both_sources = Hash.new {|h, k| h[k] = [] }
      @dependencies.each {|d| both_sources[d.name][0] = d }
      @locked_deps.each  {|name, d| both_sources[name][1] = d.source }

      both_sources.each do |name, (dep, lock_source)|
        next unless (dep.nil? && !lock_source.nil?) || (!dep.nil? && !lock_source.nil? && !lock_source.can_lock?(dep))
        gemfile_source_name = (dep && dep.source) || "no specified source"
        lockfile_source_name = lock_source || "no specified source"
        changed << "* #{name} from `#{gemfile_source_name}` to `#{lockfile_source_name}`"
      end

      reason = change_reason
      msg << "\n\n#{reason.split(", ").map(&:capitalize).join("\n")}" unless reason.strip.empty?
      msg << "\n\nYou have added to the Gemfile:\n" << added.join("\n") if added.any?
      msg << "\n\nYou have deleted from the Gemfile:\n" << deleted.join("\n") if deleted.any?
      msg << "\n\nYou have changed in the Gemfile:\n" << changed.join("\n") if changed.any?
      msg << "\n"

      raise ProductionError, msg if added.any? || deleted.any? || changed.any? || !nothing_changed?
    end

find_indexed_specs(current_spec) click to toggle source

    # File lib/bundler/definition.rb, line 531
    def find_indexed_specs(current_spec)
      index[current_spec.name].select {|spec| spec.match_platform(current_spec.platform) }.sort_by(&:version)
    end

find_resolved_spec(current_spec) click to toggle source

    # File lib/bundler/definition.rb, line 527
    def find_resolved_spec(current_spec)
      specs.find_by_name_and_platform(current_spec.name, current_spec.platform)
    end

gem_version_promoter() click to toggle source

    # File lib/bundler/definition.rb, line 133
    def gem_version_promoter
      @gem_version_promoter ||= begin
        locked_specs =
          if unlocking? && @locked_specs.empty? && !@lockfile_contents.empty?
            # Definition uses an empty set of locked_specs to indicate all gems
            # are unlocked, but GemVersionPromoter needs the locked_specs
            # for conservative comparison.
            Bundler::SpecSet.new(@locked_gems.specs)
          else
            @locked_specs
          end
        GemVersionPromoter.new(locked_specs, @unlock[:gems])
      end
    end

groups() click to toggle source

    # File lib/bundler/definition.rb, line 323
    def groups
      dependencies.map(&:groups).flatten.uniq
    end

has_local_dependencies?() click to toggle source

    # File lib/bundler/definition.rb, line 315
    def has_local_dependencies?
      !sources.path_sources.empty? || !sources.git_sources.empty?
    end

has_rubygems_remotes?() click to toggle source

    # File lib/bundler/definition.rb, line 311
    def has_rubygems_remotes?
      sources.rubygems_sources.any? {|s| s.remotes.any? }
    end

index() click to toggle source

    # File lib/bundler/definition.rb, line 267
    def index
      @index ||= Index.build do |idx|
        dependency_names = @dependencies.map(&:name)

        sources.all_sources.each do |source|
          source.dependency_names = dependency_names - pinned_spec_names(source)
          idx.add_source source.specs
          dependency_names.concat(source.unmet_deps).uniq!
        end

        double_check_for_index(idx, dependency_names)
      end
    end

lock(file, preserve_unknown_sections = false) click to toggle source

    # File lib/bundler/definition.rb, line 327
    def lock(file, preserve_unknown_sections = false)
      contents = to_lock

      # Convert to \r\n if the existing lock has them
      # i.e., Windows with `git config core.autocrlf=true`
      contents.gsub!(/\n/, "\r\n") if @lockfile_contents.match("\r\n")

      if @locked_bundler_version
        locked_major = @locked_bundler_version.segments.first
        current_major = Gem::Version.create(Bundler::VERSION).segments.first

        if updating_major = locked_major < current_major
          Bundler.ui.warn "Warning: the lockfile is being updated to Bundler #{current_major}, " \
                          "after which you will be unable to return to Bundler #{@locked_bundler_version.segments.first}."
        end
      end

      preserve_unknown_sections ||= !updating_major && (Bundler.frozen_bundle? || !(unlocking? || @unlocking_bundler))

      return if file && File.exist?(file) && lockfiles_equal?(@lockfile_contents, contents, preserve_unknown_sections)

      if Bundler.frozen_bundle?
        Bundler.ui.error "Cannot write a changed lockfile while frozen."
        return
      end

      SharedHelpers.filesystem_access(file) do |p|
        File.open(p, "wb") {|f| f.puts(contents) }
      end
    end

locked_bundler_version() click to toggle source

    # File lib/bundler/definition.rb, line 358
    def locked_bundler_version
      if @locked_bundler_version && @locked_bundler_version < Gem::Version.new(Bundler::VERSION)
        new_version = Bundler::VERSION
      end

      new_version || @locked_bundler_version || Bundler::VERSION
    end

locked_ruby_version() click to toggle source

    # File lib/bundler/definition.rb, line 366
    def locked_ruby_version
      return unless ruby_version
      if @unlock[:ruby] || !@locked_ruby_version
        Bundler::RubyVersion.system
      else
        @locked_ruby_version
      end
    end

locked_ruby_version_object() click to toggle source

    # File lib/bundler/definition.rb, line 375
    def locked_ruby_version_object
      return unless @locked_ruby_version
      @locked_ruby_version_object ||= begin
        unless version = RubyVersion.from_string(@locked_ruby_version)
          raise LockfileError, "The Ruby version #{@locked_ruby_version} from " \
            "#{@lockfile} could not be parsed. " \
            "Try running bundle update --ruby to resolve this."
        end
        version
      end
    end

missing_specs() click to toggle source

    # File lib/bundler/definition.rb, line 201
    def missing_specs
      missing = []
      resolve.materialize(requested_dependencies, missing)
      missing
    end

missing_specs?() click to toggle source

    # File lib/bundler/definition.rb, line 207
    def missing_specs?
      missing = missing_specs
      return false if missing.empty?
      Bundler.ui.debug "The definition is missing #{missing.map(&:full_name)}"
      true
    rescue BundlerError => e
      @index = nil
      @resolve = nil
      @specs = nil
      @gem_version_promoter = nil

      Bundler.ui.debug "The definition is missing dependencies, failed to resolve & materialize locally (#{e})"
      true
    end

new_platform?() click to toggle source

    # File lib/bundler/definition.rb, line 197
    def new_platform?
      @new_platform
    end

new_specs() click to toggle source

    # File lib/bundler/definition.rb, line 189
    def new_specs
      specs - @locked_specs
    end

nothing_changed?() click to toggle source

    # File lib/bundler/definition.rb, line 538
    def nothing_changed?
      !@source_changes && !@dependency_changes && !@new_platform && !@path_changes && !@local_changes && !@locked_specs_incomplete_for_platform
    end

remove_platform(platform) click to toggle source

    # File lib/bundler/definition.rb, line 516
    def remove_platform(platform)
      return if @platforms.delete(Gem::Platform.new(platform))
      raise InvalidOption, "Unable to remove the platform `#{platform}` since the only platforms are #{@platforms.join ", "}"
    end

removed_specs() click to toggle source

    # File lib/bundler/definition.rb, line 193
    def removed_specs
      @locked_specs - specs
    end

requested_specs() click to toggle source

    # File lib/bundler/definition.rb, line 222
    def requested_specs
      @requested_specs ||= begin
        groups = requested_groups
        groups.map!(&:to_sym)
        specs_for(groups)
      end
    end

resolve() click to toggle source

Resolve all the dependencies specified in Gemfile. It ensures that dependencies that have been already resolved via locked file and are fresh are reused when resolving dependencies

@return [SpecSet] resolved dependencies

    # File lib/bundler/definition.rb, line 245
    def resolve
      @resolve ||= begin
        last_resolve = converge_locked_specs
        resolve =
          if Bundler.frozen_bundle?
            Bundler.ui.debug "Frozen, using resolution from the lockfile"
            last_resolve
          elsif !unlocking? && nothing_changed?
            Bundler.ui.debug("Found no changes, using resolution from the lockfile")
            last_resolve
          else
            # Run a resolve against the locally available gems
            Bundler.ui.debug("Found changes from the lockfile, re-resolving dependencies because #{change_reason}")
            last_resolve.merge Resolver.resolve(expanded_dependencies, index, source_requirements, last_resolve, gem_version_promoter, additional_base_requirements_for_resolve, platforms)
          end

        # filter out gems that _can_ be installed on multiple platforms, but don't need
        # to be
        resolve.for(expand_dependencies(dependencies, true), [], false, false, false)
      end
    end

resolve_remotely!() click to toggle source

    # File lib/bundler/definition.rb, line 154
    def resolve_remotely!
      raise "Specs already loaded" if @specs
      @remote = true
      sources.remote!
      specs
    end

resolve_with_cache!() click to toggle source

    # File lib/bundler/definition.rb, line 148
    def resolve_with_cache!
      raise "Specs already loaded" if @specs
      sources.cached!
      specs
    end

spec_git_paths() click to toggle source

    # File lib/bundler/definition.rb, line 319
    def spec_git_paths
      sources.git_sources.map {|s| s.path.to_s }
    end

specs() click to toggle source

For given dependency list returns a `SpecSet` with Gemspec of all the required dependencies.

    1. The method first resolves the dependencies specified in Gemfile
    2. After that it tries and fetches gemspec of resolved dependencies

@return [Bundler::SpecSet]

    # File lib/bundler/definition.rb, line 167
    def specs
      @specs ||= begin
        begin
          specs = resolve.materialize(Bundler.settings[:cache_all_platforms] ? dependencies : requested_dependencies)
        rescue GemNotFound => e # Handle yanked gem
          gem_name, gem_version = extract_gem_info(e)
          locked_gem = @locked_specs[gem_name].last
          raise if locked_gem.nil? || locked_gem.version.to_s != gem_version || !@remote
          raise GemNotFound, "Your bundle is locked to #{locked_gem}, but that version could not " \
                             "be found in any of the sources listed in your Gemfile. If you haven't changed sources, " \
                             "that means the author of #{locked_gem} has removed it. You'll need to update your bundle " \
                             "to a version other than #{locked_gem} that hasn't been removed in order to install."
        end
        unless specs["bundler"].any?
          bundler = sources.metadata_source.specs.search(Gem::Dependency.new("bundler", VERSION)).last
          specs["bundler"] = bundler
        end

        specs
      end
    end

specs_for(groups) click to toggle source

    # File lib/bundler/definition.rb, line 234
    def specs_for(groups)
      deps = dependencies.select {|d| (d.groups & groups).any? }
      deps.delete_if {|d| !d.should_include? }
      specs.for(expand_dependencies(deps))
    end

to_lock() click to toggle source

    # File lib/bundler/definition.rb, line 387
    def to_lock
      require "bundler/lockfile_generator"
      LockfileGenerator.generate(self)
    end

unlocking?() click to toggle source

    # File lib/bundler/definition.rb, line 542
    def unlocking?
      @unlocking
    end

validate_platforms!() click to toggle source

    # File lib/bundler/definition.rb, line 499
    def validate_platforms!
      return if @platforms.any? do |bundle_platform|
        Bundler.rubygems.platforms.any? do |local_platform|
          MatchPlatform.platforms_match?(bundle_platform, local_platform)
        end
      end

      raise ProductionError, "Your bundle only supports platforms #{@platforms.map(&:to_s)} " \
        "but your local platforms are #{Bundler.rubygems.platforms.map(&:to_s)}, and " \
        "there's no compatible match between those two lists."
    end

validate_ruby!() click to toggle source

    # File lib/bundler/definition.rb, line 474
    def validate_ruby!
      return unless ruby_version

      if diff = ruby_version.diff(Bundler::RubyVersion.system)
        problem, expected, actual = diff

        msg = case problem
              when :engine
                "Your Ruby engine is #{actual}, but your Gemfile specified #{expected}"
              when :version
                "Your Ruby version is #{actual}, but your Gemfile specified #{expected}"
              when :engine_version
                "Your #{Bundler::RubyVersion.system.engine} version is #{actual}, but your Gemfile specified #{ruby_version.engine} #{expected}"
              when :patchlevel
                if !expected.is_a?(String)
                  "The Ruby patchlevel in your Gemfile must be a string"
                else
                  "Your Ruby patchlevel is #{actual}, but your Gemfile specified #{expected}"
                end
        end

        raise RubyVersionMismatch, msg
      end
    end

validate_runtime!() click to toggle source

    # File lib/bundler/definition.rb, line 469
    def validate_runtime!
      validate_ruby!
      validate_platforms!
    end

### Private Instance Methods

additional_base_requirements_for_resolve() click to toggle source

    # File lib/bundler/definition.rb, line 975
    def additional_base_requirements_for_resolve
      return [] unless @locked_gems && Bundler.feature_flag.only_update_to_newer_versions?
      dependencies_by_name = dependencies.inject({}) {|memo, dep| memo.update(dep.name => dep) }
      @locked_gems.specs.reduce({}) do |requirements, locked_spec|
        name = locked_spec.name
        next requirements if @locked_gems.dependencies[name] != dependencies_by_name[name]
        dep = Gem::Dependency.new(name, ">= #{locked_spec.version}")
        requirements[name] = DepProxy.new(dep, locked_spec.platform)
        requirements
      end.values
    end

change_reason() click to toggle source

    # File lib/bundler/definition.rb, line 548
    def change_reason
      if unlocking?
        unlock_reason = @unlock.reject {|_k, v| Array(v).empty? }.map do |k, v|
          if v == true
            k.to_s
          else
            v = Array(v)
            "#{k}: (#{v.join(", ")})"
          end
        end.join(", ")
        return "bundler is unlocking #{unlock_reason}"
      end
      [
        [@source_changes, "the list of sources changed"],
        [@dependency_changes, "the dependencies in your gemfile changed"],
        [@new_platform, "you added a new platform to your gemfile"],
        [@path_changes, "the gemspecs for path gems changed"],
        [@local_changes, "the gemspecs for git local gems changed"],
        [@locked_specs_incomplete_for_platform, "the lockfile does not have all gems needed for the current platform"],
      ].select(&:first).map(&:last).join(", ")
    end

compute_requires() click to toggle source

    # File lib/bundler/definition.rb, line 964
    def compute_requires
      dependencies.reduce({}) do |requires, dep|
        next requires unless dep.should_include?
        requires[dep.name] = Array(dep.autorequire || dep.name).map do |file|
          # Allow `require: true` as an alias for `require: <name>`
          file == true ? dep.name : file
        end
        requires
      end
    end

concat_ruby_version_requirements(ruby_version, ruby_versions = []) click to toggle source

    # File lib/bundler/definition.rb, line 864
    def concat_ruby_version_requirements(ruby_version, ruby_versions = [])
      return ruby_versions unless ruby_version
      if ruby_version.patchlevel
        ruby_versions << ruby_version.to_gem_version_with_patchlevel
      else
        ruby_versions.concat(ruby_version.versions.map do |version|
          requirement = Gem::Requirement.new(version)
          if requirement.exact?
            "~> #{version}.0"
          else
            requirement
          end
        end)
      end
    end

converge_dependencies() click to toggle source

    # File lib/bundler/definition.rb, line 691
    def converge_dependencies
      frozen = Bundler.frozen_bundle?
      (@dependencies + @locked_deps.values).each do |dep|
        locked_source = @locked_deps[dep.name]
        # This is to make sure that if bundler is installing in deployment mode and
        # after locked_source and sources don't match, we still use locked_source.
        if frozen && !locked_source.nil? &&
            locked_source.respond_to?(:source) && locked_source.source.instance_of?(Source::Path) && locked_source.source.path.exist?
          dep.source = locked_source.source
        elsif dep.source
          dep.source = sources.get(dep.source)
        end
        if dep.source.is_a?(Source::Gemspec)
          dep.platforms.concat(@platforms.map {|p| Dependency::REVERSE_PLATFORM_MAP[p] }.flatten(1)).uniq!
        end
      end

      changes = false
      # We want to know if all match, but don't want to check all entries
      # This means we need to return false if any dependency doesn't match
      # the lock or doesn't exist in the lock.
      @dependencies.each do |dependency|
        unless locked_dep = @locked_deps[dependency.name]
          changes = true
          next
        end

        # Gem::Dependency#== matches Gem::Dependency#type. As the lockfile
        # doesn't carry a notion of the dependency type, if you use
        # add_development_dependency in a gemspec that's loaded with the gemspec
        # directive, the lockfile dependencies and resolved dependencies end up
        # with a mismatch on #type. Work around that by setting the type on the
        # dep from the lockfile.
        locked_dep.instance_variable_set(:@type, dependency.type)

        # We already know the name matches from the hash lookup
        # so we only need to check the requirement now
        changes ||= dependency.requirement != locked_dep.requirement
      end

      changes
    end

converge_locals() click to toggle source

Get all locals and override their matching sources. Return true if any of the locals changed (for example, they point to a new revision) or depend on new specs.

    # File lib/bundler/definition.rb, line 603
    def converge_locals
      locals = []

      Bundler.settings.local_overrides.map do |k, v|
        spec   = @dependencies.find {|s| s.name == k }
        source = spec && spec.source
        if source && source.respond_to?(:local_override!)
          source.unlock! if @unlock[:gems].include?(spec.name)
          locals << [source, source.local_override!(v)]
        end
      end

      sources_with_changes = locals.select do |source, changed|
        changed || specs_changed?(source)
      end.map(&:first)
      !sources_with_changes.each {|source| @unlock[:sources] << source.name }.empty?
    end

converge_locked_specs() click to toggle source

Remove elements from the locked specs that are expired. This will most commonly happen if the Gemfile has changed since the lockfile was last generated

    # File lib/bundler/definition.rb, line 737
    def converge_locked_specs
      deps = []

      # Build a list of dependencies that are the same in the Gemfile
      # and Gemfile.lock. If the Gemfile modified a dependency, but
      # the gem in the Gemfile.lock still satisfies it, this is fine
      # too.
      @dependencies.each do |dep|
        locked_dep = @locked_deps[dep.name]

        # If the locked_dep doesn't match the dependency we're looking for then we ignore the locked_dep
        locked_dep = nil unless locked_dep == dep

        if in_locked_deps?(dep, locked_dep) || satisfies_locked_spec?(dep)
          deps << dep
        elsif dep.source.is_a?(Source::Path) && dep.current_platform? && (!locked_dep || dep.source != locked_dep.source)
          @locked_specs.each do |s|
            @unlock[:gems] << s.name if s.source == dep.source
          end

          dep.source.unlock! if dep.source.respond_to?(:unlock!)
          dep.source.specs.each {|s| @unlock[:gems] << s.name }
        end
      end

      unlock_source_unlocks_spec = Bundler.feature_flag.unlock_source_unlocks_spec?

      converged = []
      @locked_specs.each do |s|
        # Replace the locked dependency's source with the equivalent source from the Gemfile
        dep = @dependencies.find {|d| s.satisfies?(d) }
        s.source = (dep && dep.source) || sources.get(s.source)

        # Don't add a spec to the list if its source is expired. For example,
        # if you change a Git gem to RubyGems.
        next if s.source.nil?
        next if @unlock[:sources].include?(s.source.name)

        # XXX This is a backwards-compatibility fix to preserve the ability to
        # unlock a single gem by passing its name via `--source`. See issue #3759
        # TODO: delete in Bundler 2
        next if unlock_source_unlocks_spec && @unlock[:sources].include?(s.name)

        # If the spec is from a path source and it doesn't exist anymore
        # then we unlock it.

        # Path sources have special logic
        if s.source.instance_of?(Source::Path) || s.source.instance_of?(Source::Gemspec)
          other_sources_specs = begin
            s.source.specs
          rescue PathError, GitError
            # if we won't need the source (according to the lockfile),
            # don't error if the path/git source isn't available
            next if @locked_specs.
                    for(requested_dependencies, [], false, true, false).
                    none? {|locked_spec| locked_spec.source == s.source }

            raise
          end

          other = other_sources_specs[s].first

          # If the spec is no longer in the path source, unlock it. This
          # commonly happens if the version changed in the gemspec
          next unless other

          deps2 = other.dependencies.select {|d| d.type != :development }
          runtime_dependencies = s.dependencies.select {|d| d.type != :development }
          # If the dependencies of the path source have changed, unlock it
          next unless runtime_dependencies.sort == deps2.sort
        end

        converged << s
      end

      resolve = SpecSet.new(converged)
      expanded_deps = expand_dependencies(deps, true)
      @locked_specs_incomplete_for_platform = !resolve.for(expanded_deps, @unlock[:gems], true, true)
      resolve = resolve.for(expanded_deps, @unlock[:gems], false, false, false)
      diff    = nil

      # Now, we unlock any sources that do not have anymore gems pinned to it
      sources.all_sources.each do |source|
        next unless source.respond_to?(:unlock!)

        unless resolve.any? {|s| s.source == source }
          diff ||= @locked_specs.to_a - resolve.to_a
          source.unlock! if diff.any? {|s| s.source == source }
        end
      end

      resolve
    end

converge_path_source_to_gemspec_source(source) click to toggle source

    # File lib/bundler/definition.rb, line 627
    def converge_path_source_to_gemspec_source(source)
      return source unless source.instance_of?(Source::Path)
      gemspec_source = sources.path_sources.find {|s| s.is_a?(Source::Gemspec) && s.as_path_source == source }
      gemspec_source || source
    end

converge_path_sources_to_gemspec_sources() click to toggle source

    # File lib/bundler/definition.rb, line 633
    def converge_path_sources_to_gemspec_sources
      @locked_sources.map! do |source|
        converge_path_source_to_gemspec_source(source)
      end
      @locked_specs.each do |spec|
        spec.source &&= converge_path_source_to_gemspec_source(spec.source)
      end
      @locked_deps.each do |_, dep|
        dep.source &&= converge_path_source_to_gemspec_source(dep.source)
      end
    end

converge_paths() click to toggle source

    # File lib/bundler/definition.rb, line 621
    def converge_paths
      sources.path_sources.any? do |source|
        specs_changed?(source)
      end
    end

converge_rubygems_sources() click to toggle source

    # File lib/bundler/definition.rb, line 645
    def converge_rubygems_sources
      return false if Bundler.feature_flag.lockfile_uses_separate_rubygems_sources?

      changes = false

      # Get the RubyGems sources from the Gemfile.lock
      locked_gem_sources = @locked_sources.select {|s| s.is_a?(Source::Rubygems) }
      # Get the RubyGems remotes from the Gemfile
      actual_remotes = sources.rubygems_remotes

      # If there is a RubyGems source in both
      if !locked_gem_sources.empty? && !actual_remotes.empty?
        locked_gem_sources.each do |locked_gem|
          # Merge the remotes from the Gemfile into the Gemfile.lock
          changes |= locked_gem.replace_remotes(actual_remotes, Bundler.settings[:allow_deployment_source_credential_changes])
        end
      end

      changes
    end

converge_sources() click to toggle source

    # File lib/bundler/definition.rb, line 666
    def converge_sources
      changes = false

      changes |= converge_rubygems_sources

      # Replace the sources from the Gemfile with the sources from the Gemfile.lock,
      # if they exist in the Gemfile.lock and are `==`. If you can't find an equivalent
      # source in the Gemfile.lock, use the one from the Gemfile.
      changes |= sources.replace_sources!(@locked_sources)

      sources.all_sources.each do |source|
        # If the source is unlockable and the current command allows an unlock of
        # the source (for example, you are doing a `bundle update <foo>` of a git-pinned
        # gem), unlock it. For git sources, this means to unlock the revision, which
        # will cause the `ref` used to be the most recent for the branch (or master) if
        # an explicit `ref` is not used.
        if source.respond_to?(:unlock!) && @unlock[:sources].include?(source.name)
          source.unlock!
          changes = true
        end
      end

      changes
    end

dependencies_for_source_changed?(source, locked_source = source) click to toggle source

    # File lib/bundler/definition.rb, line 582
    def dependencies_for_source_changed?(source, locked_source = source)
      deps_for_source = @dependencies.select {|s| s.source == source }
      locked_deps_for_source = @locked_deps.values.select {|dep| dep.source == locked_source }

      Set.new(deps_for_source) != Set.new(locked_deps_for_source)
    end

double_check_for_index(idx, dependency_names) click to toggle source

Suppose the gem Foo depends on the gem Bar. Foo exists in `Source` A. Bar has some versions that exist in both sources A and B. At this point, the API request will have found all the versions of Bar in source A, but will not have found any versions of Bar from source B, which is a problem if the requested version of Foo specifically depends on a version of Bar that is only found in source B. This ensures that for each spec we found, we add all possible versions from all sources to the index.

    # File lib/bundler/definition.rb, line 286
    def double_check_for_index(idx, dependency_names)
      pinned_names = pinned_spec_names
      loop do
        idxcount = idx.size

        names = :names # do this so we only have to traverse to get dependency_names from the index once
        unmet_dependency_names = lambda do
          return names unless names == :names
          new_names = sources.all_sources.map(&:dependency_names_to_double_check)
          return names = nil if new_names.compact!
          names = new_names.flatten(1).concat(dependency_names)
          names.uniq!
          names -= pinned_names
          names
        end

        sources.all_sources.each do |source|
          source.double_check_for(unmet_dependency_names)
        end

        break if idxcount == idx.size
      end
    end

equivalent_rubygems_remotes?(source) click to toggle source

    # File lib/bundler/definition.rb, line 987
    def equivalent_rubygems_remotes?(source)
      return false unless source.is_a?(Source::Rubygems)

      Bundler.settings[:allow_deployment_source_credential_changes] && source.equivalent_remotes?(sources.rubygems_remotes)
    end

expand_dependencies(dependencies, remote = false) click to toggle source

    # File lib/bundler/definition.rb, line 880
    def expand_dependencies(dependencies, remote = false)
      sorted_platforms = Resolver.sort_platforms(@platforms)
      deps = []
      dependencies.each do |dep|
        dep = Dependency.new(dep, ">= 0") unless dep.respond_to?(:name)
        next if !remote && !dep.current_platform?
        platforms = dep.gem_platforms(sorted_platforms)
        if platforms.empty? && !Bundler.settings[:disable_platform_warnings]
          mapped_platforms = dep.platforms.map {|p| Dependency::PLATFORM_MAP[p] }
          Bundler.ui.warn \
            "The dependency #{dep} will be unused by any of the platforms Bundler is installing for. " \
            "Bundler is installing for #{@platforms.join ", "} but the dependency " \
            "is only for #{mapped_platforms.join ", "}. " \
            "To add those platforms to the bundle, " \
            "run `bundle lock --add-platform #{mapped_platforms.join " "}`."
        end
        platforms.each do |p|
          deps << DepProxy.new(dep, p) if remote || p == generic_local_platform
        end
      end
      deps
    end

expanded_dependencies() click to toggle source

This list of dependencies is only used in `resolve`, so it's OK to add the metadata dependencies here

    # File lib/bundler/definition.rb, line 844
    def expanded_dependencies
      @expanded_dependencies ||= begin
        expand_dependencies(dependencies + metadata_dependencies, @remote)
      end
    end

extract_gem_info(error) click to toggle source

    # File lib/bundler/definition.rb, line 958
    def extract_gem_info(error)
      # This method will extract the error message like "Could not find foo-1.2.3 in any of the sources"
      # to an array. The first element will be the gem name (e.g. foo), the second will be the version number.
      error.message.scan(/Could not find (\w+)-(\d+(?:\.\d+)+)/).flatten
    end

in_locked_deps?(dep, locked_dep) click to toggle source

    # File lib/bundler/definition.rb, line 831
    def in_locked_deps?(dep, locked_dep)
      # Because the lockfile can't link a dep to a specific remote, we need to
      # treat sources as equivalent anytime the locked dep has all the remotes
      # that the Gemfile dep does.
      locked_dep && locked_dep.source && dep.source && locked_dep.source.include?(dep.source)
    end

lockfiles_equal?(current, proposed, preserve_unknown_sections) click to toggle source

    # File lib/bundler/definition.rb, line 945
    def lockfiles_equal?(current, proposed, preserve_unknown_sections)
      if preserve_unknown_sections
        sections_to_ignore = LockfileParser.sections_to_ignore(@locked_bundler_version)
        sections_to_ignore += LockfileParser.unknown_sections_in_lockfile(current)
        sections_to_ignore += LockfileParser::ENVIRONMENT_VERSION_SECTIONS
        pattern = /#{Regexp.union(sections_to_ignore)}\n(\s{2,}.*\n)+/
        whitespace_cleanup = /\n{2,}/
        current = current.gsub(pattern, "\n").gsub(whitespace_cleanup, "\n\n").strip
        proposed = proposed.gsub(pattern, "\n").gsub(whitespace_cleanup, "\n\n").strip
      end
      current == proposed
    end

metadata_dependencies() click to toggle source

    # File lib/bundler/definition.rb, line 850
    def metadata_dependencies
      @metadata_dependencies ||= begin
        ruby_versions = concat_ruby_version_requirements(@ruby_version)
        if ruby_versions.empty? || !@ruby_version.exact?
          concat_ruby_version_requirements(RubyVersion.system)
          concat_ruby_version_requirements(locked_ruby_version_object) unless @unlock[:ruby]
        end
        [
          Dependency.new("ruby\0", ruby_versions),
          Dependency.new("rubygems\0", Gem::VERSION),
        ]
      end
    end

pinned_spec_names(skip = nil) click to toggle source

    # File lib/bundler/definition.rb, line 930
    def pinned_spec_names(skip = nil)
      pinned_names = []
      default = Bundler.feature_flag.lockfile_uses_separate_rubygems_sources? && sources.default_source
      @dependencies.each do |dep|
        next unless dep_source = dep.source || default
        next if dep_source == skip
        pinned_names << dep.name
      end
      pinned_names
    end

pretty_dep(dep, source = false) click to toggle source

    # File lib/bundler/definition.rb, line 570
    def pretty_dep(dep, source = false)
      SharedHelpers.pretty_dependency(dep, source)
    end

requested_dependencies() click to toggle source

    # File lib/bundler/definition.rb, line 903
    def requested_dependencies
      groups = requested_groups
      groups.map!(&:to_sym)
      dependencies.reject {|d| !d.should_include? || (d.groups & groups).empty? }
    end

requested_groups() click to toggle source

    # File lib/bundler/definition.rb, line 941
    def requested_groups
      groups - Bundler.settings[:without] - @optional_groups + Bundler.settings[:with]
    end

satisfies_locked_spec?(dep) click to toggle source

    # File lib/bundler/definition.rb, line 838
    def satisfies_locked_spec?(dep)
      @locked_specs[dep].any? {|s| s.satisfies?(dep) && (!dep.source || s.source.include?(dep.source)) }
    end

source_requirements() click to toggle source

    # File lib/bundler/definition.rb, line 909
    def source_requirements
      # Load all specs from remote sources
      index

      # Record the specs available in each gem's source, so that those
      # specs will be available later when the resolver knows where to
      # look for that gemspec (or its dependencies)
      default = sources.default_source
      source_requirements = { :default => default }
      default = nil unless Bundler.feature_flag.lockfile_uses_separate_rubygems_sources?
      dependencies.each do |dep|
        next unless source = dep.source || default
        source_requirements[dep.name] = source
      end
      metadata_dependencies.each do |dep|
        source_requirements[dep.name] = sources.metadata_source
      end
      source_requirements["bundler"] = sources.metadata_source # needs to come last to override
      source_requirements
    end

specs_changed?(source) click to toggle source

Check if the specs of the given source changed according to the locked source.

    # File lib/bundler/definition.rb, line 576
    def specs_changed?(source)
      locked = @locked_sources.find {|s| s == source }

      !locked || dependencies_for_source_changed?(source, locked) || specs_for_source_changed?(source)
    end

specs_for_source_changed?(source) click to toggle source

    # File lib/bundler/definition.rb, line 589
    def specs_for_source_changed?(source)
      locked_index = Index.new
      locked_index.use(@locked_specs.select {|s| source.can_lock?(s) })

      # order here matters, since Index#== is checking source.specs.include?(locked_index)
      locked_index != source.specs
    rescue PathError, GitError => e
      Bundler.ui.debug "Assuming that #{source} has not changed since fetching its specs errored (#{e})"
      false
    end