[Analyzer][Resolver] Implement more complete dependency locking

Tis should now behave more like Bundler

lib/cocoapods/installer/analyzer.rb

@@ -149,17 +149,13 @@ module Pod
           pods_state = nil
           UI.section 'Finding Podfile changes' do
             pods_by_state = lockfile.detect_changes_with_podfile(podfile)
-            pods_by_state.dup.each do |state, full_names|
-              pods = full_names.map { |fn| Specification.root_name(fn) }.uniq
-              pods_by_state[state] = pods
-            end
             pods_state = SpecsState.new(pods_by_state)
             pods_state.print
           end
           pods_state
         else
           state = SpecsState.new
-          state.added.concat(podfile.dependencies.map(&:root_name).uniq)
+          state.added.concat(podfile.dependencies.map(&:name).uniq)
           state
         end
       end
@@ -231,22 +227,45 @@ module Pod
       # is in update mode, to prevent it from upgrading the Pods that weren't
       # changed in the {Podfile}.
       #
-      # @return [Array<Dependency>] the dependencies generate by the lockfile
-      #         that prevent the resolver to update a Pod.
+      # @return [Molinillo::DependencyGraph<Dependency>] the dependencies
+      #         generated by the lockfile that prevent the resolver to update
+      #         a Pod.
       #
       def generate_version_locking_dependencies
-        if update_mode == :all
-          []
-        else
-          locking_pods = result.podfile_state.unchanged
+        require 'molinillo/dependency_graph'
+        dependency_graph = Molinillo::DependencyGraph.new
+        unless update_mode == :all || !lockfile
+          explicit_dependencies = lockfile.to_hash['DEPENDENCIES'] || []
+          explicit_dependencies.each do |string|
+            dependency = Dependency.new(string)
+            dependency_graph.add_root_vertex(dependency.name, nil)
+          end
+          add_to_dependency_graph = lambda do |object, parents|
+            case object
+            when String
+              dependency = Dependency.from_string(object)
+              dependency_graph.add_child_vertex(dependency.name, parents.empty? ? dependency : nil, parents, nil)
+            when Hash
+              object.each do |key, value|
+                dependency = Dependency.from_string(key)
+                dependency_graph.add_child_vertex(dependency.name, parents.empty? ? dependency : nil, parents, nil)
+                value.each { |v| add_to_dependency_graph.call(v, [dependency.name]) }
+              end
+            end
+          end
+          pods = lockfile.to_hash['PODS'] || []
+          pods.each do |p|
+            add_to_dependency_graph.call(p, [])
+          end
+
+          pods_to_update = result.podfile_state.changed + result.podfile_state.deleted
           if update_mode == :selected
             # If selected Pods should been updated, filter them out of the list
-            locking_pods = locking_pods.reject { |pod| update[:pods].include?(pod) }
+            pods_to_update += update[:pods]
           end
-          locking_pods.map do |pod|
-            lockfile.dependencies_to_lock_pod_named(pod)
-          end.flatten
+          pods_to_update.each { |u| dependency_graph.detach_vertex_named(u) }
         end
+        dependency_graph
       end
 
       # Fetches the podspecs of external sources if modifications to the
@@ -281,9 +300,9 @@ module Pod
           if update_mode == :selected
             pods_to_fetch += update[:pods]
           end
-          deps_to_fetch = deps_with_external_source.select { |dep| pods_to_fetch.include?(dep.root_name) }
-          deps_to_fetch_if_needed = deps_with_external_source.select { |dep| result.podfile_state.unchanged.include?(dep.root_name) }
-          deps_to_fetch += deps_to_fetch_if_needed.select { |dep| sandbox.specification(dep.root_name).nil? || !dep.external_source[:local].nil? || !dep.external_source[:path].nil? || !sandbox.pod_dir(dep.root_name).directory? }
+          deps_to_fetch = deps_with_external_source.select { |dep| pods_to_fetch.include?(dep.name) }
+          deps_to_fetch_if_needed = deps_with_external_source.select { |dep| result.podfile_state.unchanged.include?(dep.name) }
+          deps_to_fetch += deps_to_fetch_if_needed.select { |dep| sandbox.specification(dep.name).nil? || !dep.external_source[:local].nil? || !dep.external_source[:path].nil? || !sandbox.pod_dir(dep.name).directory? }
         end
 
         unless deps_to_fetch.empty?
@@ -352,7 +371,7 @@ module Pod
 
       # @!group Analysis internal products
 
-      # @return [Array<Dependency>] the dependencies generate by the lockfile
+      # @return [Molinillo::DependencyGraph<Dependency>] the dependencies generated by the lockfile
       #         that prevent the resolver to update a Pod.
       #
       attr_reader :locked_dependencies
@@ -604,7 +623,7 @@ module Pod
       #
       class SpecsState
         # @param  [Hash{Symbol=>String}] pods_by_state
-        #         The **root** name of the pods grouped by their state
+        #         The name of the pods grouped by their state
         #         (`:added`, `:removed`, `:changed` or `:unchanged`).
         #
         def initialize(pods_by_state = nil)
@@ -656,12 +675,9 @@ module Pod
         # @param  [Symbol]
         #         the state of the Pod.
         #
-        # @raise  If there is an attempt to add the name of a subspec.
-        #
         # @return [void]
         #
         def add_name(name, state)
-          raise '[Bug] Attempt to add subspec to the pods state' if name.include?('/')
           send(state) << name
         end
       end

lib/cocoapods/resolver.rb

@@ -51,11 +51,8 @@ module Pod
     #
     def resolve
       dependencies = @podfile.target_definition_list.map(&:dependencies).flatten
-      base = locked_dependencies.reduce(Molinillo::DependencyGraph.new) do |graph, locked|
-        graph.tap { |g| g.add_root_vertex(locked.name, locked) }
-      end
       @cached_sets = {}
-      @activated = Molinillo::Resolver.new(self, self).resolve(dependencies, base)
+      @activated = Molinillo::Resolver.new(self, self).resolve(dependencies, locked_dependencies)
       specs_by_target
     rescue Molinillo::ResolverError => e
       raise Informative, e.message

lib/cocoapods/sandbox.rb

@@ -219,6 +219,7 @@ module Pod
     # @return [Nil] if the podspec is not stored.
     #
     def specification_path(name)
+      name = Specification.root_name(name)
       path = specifications_root + "#{name}.podspec"
       if path.exist?
         path
@@ -378,7 +379,7 @@ module Pod
     end
 
     # @return [Hash{String=>String}] The path of the Pods with a local source
-    #         grouped by their name.
+    #         grouped by their root name.
     #
     # @todo   Rename (e.g. `pods_with_local_path`)
     #

spec/unit/installer/analyzer_spec.rb

@@ -13,7 +13,7 @@ def create_analyzer
   end
 
   hash = {}
-  hash['PODS'] = ['JSONKit (1.4)', 'NUI (0.2.0)', 'SVPullToRefresh (0.4)']
+  hash['PODS'] = ['JSONKit (1.5pre)', 'NUI (0.2.0)', 'SVPullToRefresh (0.4)']
   hash['DEPENDENCIES'] = %w(JSONKit NUI SVPullToRefresh)
   hash['SPEC CHECKSUMS'] = {}
   hash['COCOAPODS'] = Pod::VERSION
@@ -52,10 +52,10 @@ module Pod
 
       it 'computes the state of the Podfile respect to the Lockfile' do
         state = @analyzer.analyze.podfile_state
-        state.added.should     == %w(AFNetworking libextobjc)
-        state.changed.should   == ['JSONKit']
-        state.unchanged.should == ['SVPullToRefresh']
-        state.deleted.should   == ['NUI']
+        state.added.should     == %w(AFNetworking libextobjc/EXTKeyPathCoding)
+        state.changed.should   == %w()
+        state.unchanged.should == %w(JSONKit SVPullToRefresh)
+        state.deleted.should   == %w(NUI)
       end
 
       #--------------------------------------#
@@ -131,13 +131,35 @@ module Pod
 
       it 'locks the version of the dependencies which did not change in the Podfile' do
         @analyzer.analyze
-        @analyzer.send(:locked_dependencies).map(&:to_s).should == ['SVPullToRefresh (= 0.4)']
+        @analyzer.send(:locked_dependencies).map(&:payload).map(&:to_s).
+          should == ['JSONKit (= 1.5pre)', 'SVPullToRefresh (= 0.4)']
       end
 
       it 'does not lock the dependencies in update mode' do
         @analyzer.update = true
         @analyzer.analyze
-        @analyzer.send(:locked_dependencies).map(&:to_s).should == []
+        @analyzer.send(:locked_dependencies).to_a.map(&:payload).should == []
+      end
+
+      #--------------------------------------#
+
+      it 'takes into account locked implicit dependencies' do
+        podfile = Podfile.new do
+          platform :ios, '8.0'
+          xcodeproj 'SampleProject/SampleProject'
+          pod 'ARAnalytics/Mixpanel'
+        end
+        hash = {}
+        hash['PODS'] = ['ARAnalytics/CoreIOS (2.8.0)', {'ARAnalytics/Mixpanel (2.8.0)' => ['ARAnlytics/CoreIOS', 'Mixpanel']}, 'Mixpanel (2.5.1)']
+        hash['DEPENDENCIES'] = %w(ARAnalytics/Mixpanel)
+        hash['SPEC CHECKSUMS'] = {}
+        hash['COCOAPODS'] = Pod::VERSION
+        lockfile = Pod::Lockfile.new(hash)
+        analyzer = Installer::Analyzer.new(config.sandbox, podfile, lockfile)
+
+        analyzer.analyze.specifications.
+          find { |s| s.name == 'Mixpanel' }.
+          version.to_s.should == '2.5.1'
       end
 
       #--------------------------------------#