Merge prepare version of Bundler 2.2.0

6 files changed, 76 insertions, 71 deletions

diff --git a/lib/bundler/vendor/molinillo/lib/molinillo/compatibility.rb b/lib/bundler/vendor/molinillo/lib/molinillo/compatibility.rb
deleted file mode 100644
index 3eba8e4083..0000000000
--- a/lib/bundler/vendor/molinillo/lib/molinillo/compatibility.rb
+++ /dev/null
@@ -1,26 +0,0 @@
-# frozen_string_literal: true
-
-module Bundler::Molinillo
-  # Hacks needed for old Ruby versions.
-  module Compatibility
-    module_function
-
-    if [].respond_to?(:flat_map)
-      # Flat map
-      # @param [Enumerable] enum an enumerable object
-      # @block the block to flat-map with
-      # @return The enum, flat-mapped
-      def flat_map(enum, &blk)
-        enum.flat_map(&blk)
-      end
-    else
-      # Flat map
-      # @param [Enumerable] enum an enumerable object
-      # @block the block to flat-map with
-      # @return The enum, flat-mapped
-      def flat_map(enum, &blk)
-        enum.map(&blk).flatten(1)
-      end
-    end
-  end
-end
diff --git a/lib/bundler/vendor/molinillo/lib/molinillo/dependency_graph.rb b/lib/bundler/vendor/molinillo/lib/molinillo/dependency_graph.rb
index 31578bb5bf..d1d7045daf 100644
--- a/lib/bundler/vendor/molinillo/lib/molinillo/dependency_graph.rb
+++ b/lib/bundler/vendor/molinillo/lib/molinillo/dependency_graph.rb
@@ -124,6 +124,7 @@ module Bundler::Molinillo
       dot.join("\n")
     end
 
+    # @param [DependencyGraph] other
     # @return [Boolean] whether the two dependency graphs are equal, determined
     #   by a recursive traversal of each {#root_vertices} and its
     #   {Vertex#successors}
@@ -190,7 +191,7 @@ module Bundler::Molinillo
     # @return [Edge] the added edge
     def add_edge(origin, destination, requirement)
       if destination.path_to?(origin)
-        raise CircularDependencyError.new([origin, destination])
+        raise CircularDependencyError.new(path(destination, origin))
       end
       add_edge_no_circular(origin, destination, requirement)
     end
@@ -219,5 +220,37 @@ module Bundler::Molinillo
     def add_edge_no_circular(origin, destination, requirement)
       log.add_edge_no_circular(self, origin.name, destination.name, requirement)
     end
+
+    # Returns the path between two vertices
+    # @raise [ArgumentError] if there is no path between the vertices
+    # @param [Vertex] from
+    # @param [Vertex] to
+    # @return [Array<Vertex>] the shortest path from `from` to `to`
+    def path(from, to)
+      distances = Hash.new(vertices.size + 1)
+      distances[from.name] = 0
+      predecessors = {}
+      each do |vertex|
+        vertex.successors.each do |successor|
+          if distances[successor.name] > distances[vertex.name] + 1
+            distances[successor.name] = distances[vertex.name] + 1
+            predecessors[successor] = vertex
+          end
+        end
+      end
+
+      path = [to]
+      while before = predecessors[to]
+        path << before
+        to = before
+        break if to == from
+      end
+
+      unless path.last.equal?(from)
+        raise ArgumentError, "There is no path from #{from.name} to #{to.name}"
+      end
+
+      path.reverse
+    end
   end
 end
diff --git a/lib/bundler/vendor/molinillo/lib/molinillo/dependency_graph/tag.rb b/lib/bundler/vendor/molinillo/lib/molinillo/dependency_graph/tag.rb
index fccfc78cc7..5b5da3e4f9 100644
--- a/lib/bundler/vendor/molinillo/lib/molinillo/dependency_graph/tag.rb
+++ b/lib/bundler/vendor/molinillo/lib/molinillo/dependency_graph/tag.rb
@@ -14,11 +14,11 @@ module Bundler::Molinillo
       end
 
       # (see Action#up)
-      def up(_graph)
+      def up(graph)
       end
 
       # (see Action#down)
-      def down(_graph)
+      def down(graph)
       end
 
       # @!group Tag
diff --git a/lib/bundler/vendor/molinillo/lib/molinillo/errors.rb b/lib/bundler/vendor/molinillo/lib/molinillo/errors.rb
index 89c7c324d5..4d64d21072 100644
--- a/lib/bundler/vendor/molinillo/lib/molinillo/errors.rb
+++ b/lib/bundler/vendor/molinillo/lib/molinillo/errors.rb
@@ -65,7 +65,7 @@ module Bundler::Molinillo
     # @param [SpecificationProvider] specification_provider see {#specification_provider}
     def initialize(conflicts, specification_provider)
       pairs = []
-      Compatibility.flat_map(conflicts.values.flatten, &:requirements).each do |conflicting|
+      conflicts.values.flat_map(&:requirements).each do |conflicting|
         conflicting.each do |source, conflict_requirements|
           conflict_requirements.each do |c|
             pairs << [c, source]
diff --git a/lib/bundler/vendor/molinillo/lib/molinillo/gem_metadata.rb b/lib/bundler/vendor/molinillo/lib/molinillo/gem_metadata.rb
index 73f8fbf2ac..e13a781a50 100644
--- a/lib/bundler/vendor/molinillo/lib/molinillo/gem_metadata.rb
+++ b/lib/bundler/vendor/molinillo/lib/molinillo/gem_metadata.rb
@@ -2,5 +2,5 @@
 
 module Bundler::Molinillo
   # The version of Bundler::Molinillo.
-  VERSION = '0.6.6'.freeze
+  VERSION = '0.7.0'.freeze
 end
diff --git a/lib/bundler/vendor/molinillo/lib/molinillo/resolution.rb b/lib/bundler/vendor/molinillo/lib/molinillo/resolution.rb
index acf7777414..26b8bc745c 100644
--- a/lib/bundler/vendor/molinillo/lib/molinillo/resolution.rb
+++ b/lib/bundler/vendor/molinillo/lib/molinillo/resolution.rb
@@ -207,7 +207,7 @@ module Bundler::Molinillo
       def start_resolution
         @started_at = Time.now
 
-        handle_missing_or_push_dependency_state(initial_state)
+        push_initial_state
 
         debug { "Starting resolution (#{@started_at})\nUser-requested dependencies: #{original_requested}" }
         resolver_ui.before_resolution
@@ -273,10 +273,10 @@ module Bundler::Molinillo
         states.last
       end
 
-      # Creates the initial state for the resolution, based upon the
+      # Creates and pushes the initial state for the resolution, based upon the
       # {#requested} dependencies
-      # @return [DependencyState] the initial state for the resolution
-      def initial_state
+      # @return [void]
+      def push_initial_state
         graph = DependencyGraph.new.tap do |dg|
           original_requested.each do |requested|
             vertex = dg.add_vertex(name_for(requested), nil, true)
@@ -285,18 +285,7 @@ module Bundler::Molinillo
           dg.tag(:initial_state)
         end
 
-        requirements = sort_dependencies(original_requested, graph, {})
-        initial_requirement = requirements.shift
-        DependencyState.new(
-          initial_requirement && name_for(initial_requirement),
-          requirements,
-          graph,
-          initial_requirement,
-          possibilities_for_requirement(initial_requirement, graph),
-          0,
-          {},
-          []
-        )
+        push_state_for_requirements(original_requested, true, graph)
       end
 
       # Unwinds the states stack because a conflict has been encountered
@@ -361,7 +350,7 @@ module Bundler::Molinillo
         current_detail
       end
 
-      # @param [Array<Object>] array of requirements that combine to create a conflict
+      # @param [Array<Object>] binding_requirements array of requirements that combine to create a conflict
       # @return [Array<UnwindDetails>] array of UnwindDetails that have a chance
       #    of resolving the passed requirements
       def unwind_options_for_requirements(binding_requirements)
@@ -429,7 +418,7 @@ module Bundler::Molinillo
       end
 
       # @param [DependencyState] state
-      # @param [Array] array of requirements
+      # @param [Array] binding_requirements array of requirements
       # @return [Boolean] whether or not the given state has any possibilities
       #    that could satisfy the given requirements
       def conflict_fixing_possibilities?(state, binding_requirements)
@@ -444,7 +433,8 @@ module Bundler::Molinillo
 
       # Filter's a state's possibilities to remove any that would not fix the
       # conflict we've just rewound from
-      # @param [UnwindDetails] details of the conflict just unwound from
+      # @param [UnwindDetails] unwind_details details of the conflict just
+      #   unwound from
       # @return [void]
       def filter_possibilities_after_unwind(unwind_details)
         return unless state && !state.possibilities.empty?
@@ -458,7 +448,7 @@ module Bundler::Molinillo
 
       # Filter's a state's possibilities to remove any that would not satisfy
       # the requirements in the conflict we've just rewound from
-      # @param [UnwindDetails] details of the conflict just unwound from
+      # @param [UnwindDetails] unwind_details details of the conflict just unwound from
       # @return [void]
       def filter_possibilities_for_primary_unwind(unwind_details)
         unwinds_to_state = unused_unwind_options.select { |uw| uw.state_index == unwind_details.state_index }
@@ -491,7 +481,7 @@ module Bundler::Molinillo
 
       # Filter's a state's possibilities to remove any that would (eventually)
       # create a requirement in the conflict we've just rewound from
-      # @param [UnwindDetails] details of the conflict just unwound from
+      # @param [UnwindDetails] unwind_details details of the conflict just unwound from
       # @return [void]
       def filter_possibilities_for_parent_unwind(unwind_details)
         unwinds_to_state = unused_unwind_options.select { |uw| uw.state_index == unwind_details.state_index }
@@ -500,7 +490,7 @@ module Bundler::Molinillo
         primary_unwinds = unwinds_to_state.select(&:unwinding_to_primary_requirement?).uniq
         parent_unwinds = unwinds_to_state.uniq - primary_unwinds
 
-        allowed_possibility_sets = Compatibility.flat_map(primary_unwinds) do |unwind|
+        allowed_possibility_sets = primary_unwinds.flat_map do |unwind|
           states[unwind.state_index].possibilities.select do |possibility_set|
             possibility_set.possibilities.any? do |poss|
               possibility_satisfies_requirements?(poss, unwind.conflicting_requirements)
@@ -508,7 +498,7 @@ module Bundler::Molinillo
           end
         end
 
-        requirements_to_avoid = Compatibility.flat_map(parent_unwinds, &:sub_dependencies_to_avoid)
+        requirements_to_avoid = parent_unwinds.flat_map(&:sub_dependencies_to_avoid)
 
         state.possibilities.reject! do |possibility_set|
           !allowed_possibility_sets.include?(possibility_set) &&
@@ -524,12 +514,12 @@ module Bundler::Molinillo
 
         possible_binding_requirements = conflict.requirements.values.flatten(1).uniq
 
-        # When there’s a `CircularDependency` error the conflicting requirement
-        # (the one causing the circular) won’t be `conflict.requirement`
-        # (which won’t be for the right state, because we won’t have created it,
-        # because it’s circular).
-        # We need to make sure we have that requirement in the conflict’s list,
-        # otherwise we won’t be able to unwind properly, so we just return all
+        # When there's a `CircularDependency` error the conflicting requirement
+        # (the one causing the circular) won't be `conflict.requirement`
+        # (which won't be for the right state, because we won't have created it,
+        # because it's circular).
+        # We need to make sure we have that requirement in the conflict's list,
+        # otherwise we won't be able to unwind properly, so we just return all
         # the requirements for the conflict.
         return possible_binding_requirements if conflict.underlying_error
 
@@ -558,8 +548,8 @@ module Bundler::Molinillo
       end
 
       # @param [Object] requirement we wish to check
-      # @param [Array] array of requirements
-      # @param [Array] array of possibilities the requirements will be used to filter
+      # @param [Array] possible_binding_requirements array of requirements
+      # @param [Array] possibilities array of possibilities the requirements will be used to filter
       # @return [Boolean] whether or not the given requirement is required to filter
       #    out all elements of the array of possibilities.
       def binding_requirement_in_set?(requirement, possible_binding_requirements, possibilities)
@@ -568,6 +558,7 @@ module Bundler::Molinillo
         end
       end
 
+      # @param [Object] requirement
       # @return [Object] the requirement that led to `requirement` being added
       #   to the list of requirements.
       def parent_of(requirement)
@@ -577,6 +568,7 @@ module Bundler::Molinillo
         parent_state.requirement
       end
 
+      # @param [String] name
       # @return [Object] the requirement that led to a version of a possibility
       #   with the given name being activated.
       def requirement_for_existing_name(name)
@@ -585,6 +577,7 @@ module Bundler::Molinillo
         states.find { |s| s.name == name }.requirement
       end
 
+      # @param [Object] requirement
       # @return [ResolutionState] the state whose `requirement` is the given
       #   `requirement`.
       def find_state_for(requirement)
@@ -592,6 +585,7 @@ module Bundler::Molinillo
         states.find { |i| requirement == i.requirement }
       end
 
+      # @param [Object] underlying_error
       # @return [Conflict] a {Conflict} that reflects the failure to activate
       #   the {#possibility} in conjunction with the current {#state}
       def create_conflict(underlying_error = nil)
@@ -628,6 +622,7 @@ module Bundler::Molinillo
         vertex.requirements.map { |r| requirement_tree_for(r) }
       end
 
+      # @param [Object] requirement
       # @return [Array<Object>] the list of requirements that led to
       #   `requirement` being required.
       def requirement_tree_for(requirement)
@@ -673,9 +668,8 @@ module Bundler::Molinillo
           attempt_to_filter_existing_spec(existing_vertex)
         else
           latest = possibility.latest_version
-          # use reject!(!satisfied) for 1.8.7 compatibility
-          possibility.possibilities.reject! do |possibility|
-            !requirement_satisfied_by?(requirement, activated, possibility)
+          possibility.possibilities.select! do |possibility|
+            requirement_satisfied_by?(requirement, activated, possibility)
           end
           if possibility.latest_version.nil?
             # ensure there's a possibility for better error messages
@@ -705,7 +699,7 @@ module Bundler::Molinillo
 
       # Generates a filtered version of the existing vertex's `PossibilitySet` using the
       # current state's `requirement`
-      # @param [Object] existing vertex
+      # @param [Object] vertex existing vertex
       # @return [PossibilitySet] filtered possibility set
       def filtered_possibility_set(vertex)
         PossibilitySet.new(vertex.payload.dependencies, vertex.payload.possibilities & possibility.possibilities)
@@ -730,7 +724,7 @@ module Bundler::Molinillo
       end
 
       # Requires the dependencies that the recently activated spec has
-      # @param [Object] activated_possibility the PossibilitySet that has just been
+      # @param [Object] possibility_set the PossibilitySet that has just been
       #   activated
       # @return [void]
       def require_nested_dependencies_for(possibility_set)
@@ -749,6 +743,8 @@ module Bundler::Molinillo
       # Pushes a new {DependencyState} that encapsulates both existing and new
       # requirements
       # @param [Array] new_requirements
+      # @param [Boolean] requires_sort
+      # @param [Object] new_activated
       # @return [void]
       def push_state_for_requirements(new_requirements, requires_sort = true, new_activated = activated)
         new_requirements = sort_dependencies(new_requirements.uniq, new_activated, conflicts) if requires_sort
@@ -767,7 +763,8 @@ module Bundler::Molinillo
 
       # Checks a proposed requirement with any existing locked requirement
       # before generating an array of possibilities for it.
-      # @param [Object] the proposed requirement
+      # @param [Object] requirement the proposed requirement
+      # @param [Object] activated
       # @return [Array] possibilities
       def possibilities_for_requirement(requirement, activated = self.activated)
         return [] unless requirement
@@ -778,7 +775,8 @@ module Bundler::Molinillo
         group_possibilities(search_for(requirement))
       end
 
-      # @param [Object] the proposed requirement
+      # @param [Object] requirement the proposed requirement
+      # @param [Object] activated
       # @return [Array] possibility set containing only the locked requirement, if any
       def locked_requirement_possibility_set(requirement, activated = self.activated)
         all_possibilities = search_for(requirement)
@@ -797,8 +795,8 @@ module Bundler::Molinillo
       # Build an array of PossibilitySets, with each element representing a group of
       # dependency versions that all have the same sub-dependency version constraints
       # and are contiguous.
-      # @param [Array] an array of possibilities
-      # @return [Array] an array of possibility sets
+      # @param [Array] possibilities an array of possibilities
+      # @return [Array<PossibilitySet>] an array of possibility sets
       def group_possibilities(possibilities)
         possibility_sets = []
         current_possibility_set = nil