class Bundler::Definition

# File bundler/definition.rb, line 32
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

# File bundler/definition.rb, line 59
def initialize(lockfile, dependencies, sources, unlock, ruby_version = nil, optional_groups = [], gemfiles = [])
  if [true, false].include?(unlock)
    @unlocking_bundler = false
    @unlocking = unlock
  else
    @unlocking_bundler = unlock.delete(:bundler)
    @unlocking = unlock.any? {|_k, v| !Array(v).empty? }
  end

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

  @lockfile               = lockfile
  @lockfile_contents      = String.new

  @locked_bundler_version = nil
  @resolved_bundler_version = nil

  @locked_ruby_version = nil
  @new_platform = nil
  @removed_platform = nil

  if lockfile_exists?
    @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
    @originally_locked_specs = SpecSet.new(@locked_gems.specs)
    @locked_checksums = @locked_gems.checksums

    if unlock != true
      @locked_deps    = @locked_gems.dependencies
      @locked_specs   = @originally_locked_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([])
    @originally_locked_specs = @locked_specs
    @locked_sources = []
    @locked_platforms = []
    @locked_checksums = nil
  end

  locked_gem_sources = @locked_sources.select {|s| s.is_a?(Source::Rubygems) }
  @multisource_allowed = locked_gem_sources.size == 1 && locked_gem_sources.first.multiple_remotes? && Bundler.frozen_bundle?

  if @multisource_allowed
    unless sources.aggregate_global_source?
      msg = "Your lockfile contains a single rubygems source section with multiple remotes, which is insecure. Make sure you run `bundle install` in non frozen mode and commit the result to make your lockfile secure."

      Bundler::SharedHelpers.major_deprecation 2, msg
    end

    @sources.merged_gem_lockfile_sections!(locked_gem_sources.first)
  end

  @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

  if @unlock[:conservative]
    @unlock[:gems] ||= @dependencies.map(&:name)
  else
    eager_unlock = (@unlock[:gems] || []).map {|name| Dependency.new(name, ">= 0") }
    @unlock[:gems] = @locked_specs.for(eager_unlock, false, platforms).map(&:name).uniq
  end

  @dependency_changes = converge_dependencies
  @local_changes = converge_locals

  check_lockfile
end

# File bundler/definition.rb, line 477
def add_platform(platform)
  @new_platform ||= !@platforms.include?(platform)
  @platforms |= [platform]
end

# File bundler/definition.rb, line 382
def bundler_version_to_lock
  @resolved_bundler_version || Bundler.gem_version
end

# File bundler/definition.rb, line 242
def current_dependencies
  filter_relevant(dependencies)
end

# File bundler/definition.rb, line 246
def current_locked_dependencies
  filter_relevant(locked_dependencies)
end

# File bundler/definition.rb, line 265
def deleted_deps
  @deleted_deps ||= locked_dependencies - @dependencies
end

# File bundler/definition.rb, line 275
def dependencies_for(groups)
  groups.map!(&:to_sym)
  deps = current_dependencies # always returns a new array
  deps.select! do |d|
    if RUBY_VERSION >= "3.1"
      d.groups.intersect?(groups)
    else
      !(d.groups & groups).empty?
    end
  end
  deps
end

# File bundler/definition.rb, line 391
def ensure_equivalent_gemfile_and_lockfile(explicit_flag = false)
  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}" }

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

  both_sources = Hash.new {|h, k| h[k] = [] }
  current_dependencies.each {|d| both_sources[d.name][0] = d }
  current_locked_dependencies.each {|d| both_sources[d.name][1] = d }

  both_sources.each do |name, (dep, lock_dep)|
    next if dep.nil? || lock_dep.nil?

    gemfile_source = dep.source || default_source
    lock_source = lock_dep.source || default_source
    next if lock_source.include?(gemfile_source)

    gemfile_source_name = dep.source ? gemfile_source.to_gemfile : "no specified source"
    lockfile_source_name = lock_dep.source ? lock_source.to_gemfile : "no specified source"
    changed << "* #{name} from `#{lockfile_source_name}` to `#{gemfile_source_name}`"
  end

  reason = change_reason
  msg = String.new
  msg << "#{reason.capitalize.strip}, but the lockfile can't be updated because frozen mode is set"
  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\nRun `bundle install` elsewhere and add the updated #{SharedHelpers.relative_gemfile_path} to version control.\n"

  unless explicit_flag
    suggested_command = unless Bundler.settings.locations("frozen").keys.include?(:env)
      "bundle config set frozen false"
    end
    msg << "If this is a development machine, remove the #{SharedHelpers.relative_lockfile_path} " \
           "freeze by running `#{suggested_command}`." if suggested_command
  end

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

# File bundler/definition.rb, line 250
def filter_relevant(dependencies)
  platforms_array = [generic_local_platform].freeze
  dependencies.select do |d|
    d.should_include? && !d.gem_platforms(platforms_array).empty?
  end
end

# File bundler/definition.rb, line 158
def gem_version_promoter
  @gem_version_promoter ||= GemVersionPromoter.new
end

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

# File bundler/definition.rb, line 327
def lock(file, preserve_unknown_sections = false)
  return if Definition.no_lock

  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 = bundler_version_to_lock.segments.first

    updating_major = locked_major < current_major
  end

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

  if file && File.exist?(file) && lockfiles_equal?(@lockfile_contents, contents, preserve_unknown_sections)
    return if Bundler.frozen_bundle?
    SharedHelpers.filesystem_access(file) { FileUtils.touch(file) }
    return
  end

  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

# File bundler/definition.rb, line 257
def locked_dependencies
  @locked_deps.values
end

# File bundler/definition.rb, line 361
def locked_ruby_version
  return unless ruby_version
  if @unlock[:ruby] || !@locked_ruby_version
    Bundler::RubyVersion.system
  else
    @locked_ruby_version
  end
end

# File bundler/definition.rb, line 370
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

# File bundler/definition.rb, line 214
def missing_specs
  resolve.materialize(requested_dependencies).missing_specs
end

# File bundler/definition.rb, line 218
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
  @resolve = nil
  @resolver = nil
  @resolution_packages = nil
  @specs = nil
  @gem_version_promoter = nil

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

# File bundler/definition.rb, line 489
def most_specific_locked_platform
  @platforms.min_by do |bundle_platform|
    platform_specificity_match(bundle_platform, local_platform)
  end
end

# File bundler/definition.rb, line 261
def new_deps
  @new_deps ||= @dependencies - locked_dependencies
end

# File bundler/definition.rb, line 206
def new_specs
  specs - @locked_specs
end

# File bundler/definition.rb, line 510
def no_resolve_needed?
  !unlocking? && nothing_changed?
end

# File bundler/definition.rb, line 498
def nothing_changed?
  !@source_changes &&
    !@dependency_changes &&
    !@new_platform &&
    !@path_changes &&
    !@local_changes &&
    !@missing_lockfile_dep &&
    !@unlocking_bundler &&
    !@locked_spec_with_missing_deps &&
    !@locked_spec_with_invalid_deps
end

# File bundler/definition.rb, line 482
def remove_platform(platform)
  removed_platform = @platforms.delete(Gem::Platform.new(platform))
  @removed_platform ||= removed_platform
  return if removed_platform
  raise InvalidOption, "Unable to remove the platform `#{platform}` since the only platforms are #{@platforms.join ", "}"
end

# File bundler/definition.rb, line 210
def removed_specs
  @locked_specs - specs
end

# File bundler/definition.rb, line 238
def requested_dependencies
  dependencies_for(requested_groups)
end

# File bundler/definition.rb, line 234
def requested_specs
  specs_for(requested_groups)
end

# File bundler/definition.rb, line 179
def resolution_mode=(options)
  if options["local"]
    @remote = false
  else
    @remote = true
    @prefer_local = options["prefer-local"]
  end
end

# File bundler/definition.rb, line 293
def resolve
  @resolve ||= if Bundler.frozen_bundle?
    Bundler.ui.debug "Frozen, using resolution from the lockfile"
    @locked_specs
  elsif no_resolve_needed?
    if deleted_deps.any?
      Bundler.ui.debug "Some dependencies were deleted, using a subset of the resolution from the lockfile"
      SpecSet.new(filter_specs(@locked_specs, @dependencies - deleted_deps))
    else
      Bundler.ui.debug "Found no changes, using resolution from the lockfile"
      if @removed_platform || @locked_gems.may_include_redundant_platform_specific_gems?
        SpecSet.new(filter_specs(@locked_specs, @dependencies))
      else
        @locked_specs
      end
    end
  else
    Bundler.ui.debug "Found changes from the lockfile, re-resolving dependencies because #{change_reason}"
    start_resolution
  end
end

# File bundler/definition.rb, line 162
def resolve_only_locally!
  @remote = false
  sources.local_only!
  resolve
end

# File bundler/definition.rb, line 173
def resolve_remotely!
  @remote = true
  sources.remote!
  resolve
end

# File bundler/definition.rb, line 168
def resolve_with_cache!
  sources.cached!
  resolve
end

# File bundler/definition.rb, line 188
def setup_sources_for_resolve
  if @remote == false
    sources.cached!
  else
    sources.remote!
  end
end

# File bundler/definition.rb, line 315
def should_complete_platforms?
  !lockfile_exists? && generic_local_platform_is_ruby? && !Bundler.settings[:force_ruby_platform]
end

# File bundler/definition.rb, line 319
def spec_git_paths
  sources.git_sources.map {|s| File.realpath(s.path) if File.exist?(s.path) }.compact
end

# File bundler/definition.rb, line 202
def specs
  @specs ||= materialize(requested_dependencies)
end

# File bundler/definition.rb, line 269
def specs_for(groups)
  return specs if groups.empty?
  deps = dependencies_for(groups)
  materialize(deps)
end

# File bundler/definition.rb, line 386
def to_lock
  require_relative "lockfile_generator"
  LockfileGenerator.generate(self)
end

# File bundler/definition.rb, line 514
def unlocking?
  @unlocking
end

# File bundler/definition.rb, line 469
def validate_platforms!
  return if current_platform_locked?

  raise ProductionError, "Your bundle only supports platforms #{@platforms.map(&:to_s)} " \
    "but your local platform is #{local_platform}. " \
    "Add the current platform to the lockfile with\n`bundle lock --add-platform #{local_platform}` and try again."
end

# File bundler/definition.rb, line 444
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

# File bundler/definition.rb, line 439
def validate_runtime!
  validate_ruby!
  validate_platforms!
end

# File bundler/definition.rb, line 638
def add_current_platform
  return if current_ruby_platform_locked?

  add_platform(local_platform)
end

# File bundler/definition.rb, line 985
def additional_base_requirements_for_resolve(resolution_packages, last_resolve)
  return resolution_packages unless @locked_gems && !sources.expired_sources?(@locked_gems.sources)
  converge_specs(@originally_locked_specs - last_resolve).each do |locked_spec|
    next if locked_spec.source.is_a?(Source::Path)
    resolution_packages.base_requirements[locked_spec.name] = Gem::Requirement.new(">= #{locked_spec.version}")
  end
  resolution_packages
end

# File bundler/definition.rb, line 644
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"],
    [@missing_lockfile_dep, "your lock file is missing \"#{@missing_lockfile_dep}\""],
    [@unlocking_bundler, "an update to the version of Bundler itself was requested"],
    [@locked_spec_with_missing_deps, "your lock file includes \"#{@locked_spec_with_missing_deps}\" but not some of its dependencies"],
    [@locked_spec_with_invalid_deps, "your lockfile does not satisfy dependencies of \"#{@locked_spec_with_invalid_deps}\""],
  ].select(&:first).map(&:last).join(", ")
end

# File bundler/definition.rb, line 719
def check_lockfile
  @missing_lockfile_dep = nil

  @locked_spec_with_invalid_deps = nil
  @locked_spec_with_missing_deps = nil

  missing = []
  invalid = []

  @locked_specs.each do |s|
    validation = @locked_specs.validate_deps(s)

    missing << s if validation == :missing
    invalid << s if validation == :invalid
  end

  if missing.any?
    @locked_specs.delete(missing)

    @locked_spec_with_missing_deps = missing.first.name
  elsif !@dependency_changes
    @missing_lockfile_dep = current_dependencies.find do |d|
      @locked_specs[d.name].empty? && d.name != "bundler"
    end&.name
  end

  if invalid.any?
    @locked_specs.delete(invalid)

    @locked_spec_with_invalid_deps = invalid.first.name
  end
end

# File bundler/definition.rb, line 802
def converge_dependencies
  changes = false

  @dependencies.each do |dep|
    if dep.source
      dep.source = sources.get(dep.source)
    end

    next if unlocking?

    unless locked_dep = @locked_deps[dep.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, dep.type)

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

  changes
end

# File bundler/definition.rb, line 701
def converge_locals
  locals = []

  Bundler.settings.local_overrides.map do |k, v|
    spec   = @dependencies.find {|s| s.name == k }
    source = spec&.source
    if 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

# File bundler/definition.rb, line 836
def converge_locked_specs
  converged = converge_specs(@locked_specs)

  resolve = SpecSet.new(converged.reject {|s| @unlock[:gems].include?(s.name) })

  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

# File bundler/definition.rb, line 758
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

# File bundler/definition.rb, line 764
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

# File bundler/definition.rb, line 752
def converge_paths
  sources.path_sources.any? do |source|
    specs_changed?(source)
  end
end

# File bundler/definition.rb, line 776
def converge_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|
    # has to be done separately, because we want to keep the locked checksum
    # store for a source, even when doing a full update
    if @locked_checksums && @locked_gems && locked_source = @locked_gems.sources.find {|s| s == source && !s.equal?(source) }
      source.checksum_store.merge!(locked_source.checksum_store)
    end
    # 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

# File bundler/definition.rb, line 856
def converge_specs(specs)
  converged = []
  deps = []

  @specs_that_changed_sources = []

  specs.each do |s|
    name = s.name
    dep = @dependencies.find {|d| s.satisfies?(d) }
    lockfile_source = s.source

    if dep
      gemfile_source = dep.source || default_source

      @specs_that_changed_sources << s if gemfile_source != lockfile_source
      deps << dep if !dep.source || lockfile_source.include?(dep.source)
      @unlock[:gems] << name if lockfile_source.include?(dep.source) && lockfile_source != gemfile_source

      # Replace the locked dependency's source with the equivalent source from the Gemfile
      s.source = gemfile_source
    else
      # Replace the locked dependency's source with the default source, if the locked source is no longer in the Gemfile
      s.source = default_source unless sources.get(lockfile_source)
    end

    next if @unlock[:sources].include?(s.source.name)

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

        raise
      end

      new_spec = new_specs[s].first
      if new_spec
        s.dependencies.replace(new_spec.dependencies)
      else
        # If the spec is no longer in the path source, unlock it. This
        # commonly happens if the version changed in the gemspec
        @unlock[:gems] << name
      end
    end

    if dep.nil? && requested_dependencies.find {|d| name == d.name }
      @unlock[:gems] << s.name
    else
      converged << s
    end
  end

  filter_specs(converged, deps)
end

# File bundler/definition.rb, line 632
def current_platform_locked?
  @platforms.any? do |bundle_platform|
    MatchPlatform.platforms_match?(bundle_platform, local_platform)
  end
end

# File bundler/definition.rb, line 625
def current_ruby_platform_locked?
  return false unless generic_local_platform_is_ruby?
  return false if Bundler.settings[:force_ruby_platform] && !@platforms.include?(Gem::Platform::RUBY)

  current_platform_locked?
end

# File bundler/definition.rb, line 953
def default_source
  sources.default_source
end

# File bundler/definition.rb, line 681
def dependencies_for_source_changed?(source, locked_source = source)
  deps_for_source = @dependencies.select {|s| s.source == source }
  locked_deps_for_source = locked_dependencies.select {|dep| dep.source == locked_source }

  deps_for_source.uniq.sort != locked_deps_for_source.sort
end

# File bundler/definition.rb, line 532
def dependencies_with_bundler
  return dependencies unless @unlocking_bundler
  return dependencies if dependencies.map(&:name).include?("bundler")

  [Dependency.new("bundler", @unlocking_bundler)] + dependencies
end

# File bundler/definition.rb, line 528
def expanded_dependencies
  dependencies_with_bundler + metadata_dependencies
end

# File bundler/definition.rb, line 548
def filter_specs(specs, deps)
  SpecSet.new(specs).for(deps, false, platforms)
end

# File bundler/definition.rb, line 520
def lockfile_exists?
  lockfile && File.exist?(lockfile)
end

# File bundler/definition.rb, line 971
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::RUBY
    sections_to_ignore << LockfileParser::BUNDLED unless @unlocking_bundler
    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

# File bundler/definition.rb, line 552
def materialize(dependencies)
  specs = resolve.materialize(dependencies)
  missing_specs = specs.missing_specs

  if missing_specs.any?
    missing_specs.each do |s|
      locked_gem = @locked_specs[s.name].last
      next if locked_gem.nil? || locked_gem.version != s.version || !@remote
      raise GemNotFound, "Your bundle is locked to #{locked_gem} from #{locked_gem.source}, but that version can " \
                         "no longer be found in that source. 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

    missing_specs_list = missing_specs.group_by(&:source).map do |source, missing_specs_for_source|
      "#{missing_specs_for_source.map(&:full_name).join(", ")} in #{source}"
    end

    raise GemNotFound, "Could not find #{missing_specs_list.join(" nor ")}"
  end

  incomplete_specs = specs.incomplete_specs
  loop do
    break if incomplete_specs.empty?

    Bundler.ui.debug("The lockfile does not have all gems needed for the current platform though, Bundler will still re-resolve dependencies")
    setup_sources_for_resolve
    resolution_packages.delete(incomplete_specs)
    @resolve = start_resolution
    specs = resolve.materialize(dependencies)

    still_incomplete_specs = specs.incomplete_specs

    if still_incomplete_specs == incomplete_specs
      package = resolution_packages.get_package(incomplete_specs.first.name)
      resolver.raise_not_found! package
    end

    incomplete_specs = still_incomplete_specs
  end

  bundler = sources.metadata_source.specs.search(["bundler", Bundler.gem_version]).last
  specs["bundler"] = bundler

  specs
end

# File bundler/definition.rb, line 917
def metadata_dependencies
  @metadata_dependencies ||= [
    Dependency.new("Ruby\0", Bundler::RubyVersion.system.gem_version),
    Dependency.new("RubyGems\0", Gem::VERSION),
  ]
end

# File bundler/definition.rb, line 612
def pin_locally_available_names(source_requirements)
  source_requirements.each_with_object({}) do |(name, original_source), new_source_requirements|
    local_source = original_source.dup
    local_source.local_only!

    new_source_requirements[name] = if local_source.specs.search(name).any?
      local_source
    else
      original_source
    end
  end
end

# File bundler/definition.rb, line 608
def precompute_source_requirements_for_indirect_dependencies?
  sources.non_global_rubygems_sources.all?(&:dependency_api_available?) && !sources.aggregate_global_source?
end

# File bundler/definition.rb, line 669
def pretty_dep(dep)
  SharedHelpers.pretty_dependency(dep)
end

# File bundler/definition.rb, line 994
def remove_invalid_platforms!(dependencies)
  return if Bundler.frozen_bundle?

  platforms.reverse_each do |platform|
    next if local_platform == platform ||
            (@new_platform && platforms.last == platform) ||
            @path_changes ||
            @dependency_changes ||
            !@originally_locked_specs.incomplete_for_platform?(dependencies, platform)

    remove_platform(platform)
    add_current_platform if platform == Gem::Platform::RUBY
  end
end

# File bundler/definition.rb, line 965
def requested_groups
  values = groups - Bundler.settings[:without] - @optional_groups + Bundler.settings[:with]
  values &= Bundler.settings[:only] unless Bundler.settings[:only].empty?
  values
end

# File bundler/definition.rb, line 539
def resolution_packages
  @resolution_packages ||= begin
    last_resolve = converge_locked_specs
    remove_invalid_platforms!(current_dependencies)
    packages = Resolver::Base.new(source_requirements, expanded_dependencies, last_resolve, @platforms, locked_specs: @originally_locked_specs, unlock: @unlock[:gems], prerelease: gem_version_promoter.pre?)
    additional_base_requirements_for_resolve(packages, last_resolve)
  end
end

# File bundler/definition.rb, line 524
def resolver
  @resolver ||= Resolver.new(resolution_packages, gem_version_promoter)
end

# File bundler/definition.rb, line 1009
def source_map
  @source_map ||= SourceMap.new(sources, dependencies, @locked_specs)
end

# File bundler/definition.rb, line 924
def source_requirements
  # 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)
  source_requirements = if precompute_source_requirements_for_indirect_dependencies?
    all_requirements = source_map.all_requirements
    all_requirements = pin_locally_available_names(all_requirements) if @prefer_local
    { default: default_source }.merge(all_requirements)
  else
    { default: Source::RubygemsAggregate.new(sources, source_map) }.merge(source_map.direct_requirements)
  end
  source_requirements.merge!(source_map.locked_requirements) unless @remote
  metadata_dependencies.each do |dep|
    source_requirements[dep.name] = sources.metadata_source
  end

  default_bundler_source = source_requirements["bundler"] || default_source

  if @unlocking_bundler
    default_bundler_source.add_dependency_names("bundler")
  else
    source_requirements[:default_bundler] = default_bundler_source
    source_requirements["bundler"] = sources.metadata_source # needs to come last to override
  end

  verify_changed_sources!
  source_requirements
end

# File bundler/definition.rb, line 675
def specs_changed?(source)
  locked = @locked_sources.find {|s| s == source }

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

# File bundler/definition.rb, line 688
def specs_for_source_changed?(source)
  locked_index = Index.new
  locked_index.use(@locked_specs.select {|s| source.can_lock?(s) })

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

# File bundler/definition.rb, line 599
def start_resolution
  result = SpecSet.new(resolver.start)

  @resolved_bundler_version = result.find {|spec| spec.name == "bundler" }&.version
  @platforms = result.complete_platforms!(platforms) if should_complete_platforms?

  SpecSet.new(result.for(dependencies, false, @platforms))
end

# File bundler/definition.rb, line 957
def verify_changed_sources!
  @specs_that_changed_sources.each do |s|
    if s.source.specs.search(s.name).empty?
      raise GemNotFound, "Could not find gem '#{s.name}' in #{s.source}"
    end
  end
end