Remove the dependancy of grit from class Network::Graph

app/helpers/graph_helper.rb

 module GraphHelper
-  def get_refs(commit)
+  def get_refs(repo, commit)
     refs = ""
-    refs += commit.refs.collect{|r|r.name}.join(" ") if commit.refs
+    refs += commit.ref_names(repo).join(" ")
     # append note count
     refs += "[#{@graph.notes[commit.id]}]" if @graph.notes[commit.id] > 0

app/models/network/commit.rb

@@ -4,15 +4,13 @@ module Network
   class Commit
     include ActionView::Helpers::TagHelper
-    attr_reader :refs
     attr_accessor :time, :spaces, :parent_spaces
-    def initialize(raw_commit, refs)
-      @commit = Gitlab::Git::Commit.new(raw_commit)
+    def initialize(raw_commit)
+      @commit = raw_commit
       @time = -1
       @spaces = []
       @parent_spaces = []
-      @refs = refs || []
     end
     def method_missing(m, *args, &block)

app/models/network/graph.rb

-require "grit"
-
 module Network
   class Graph
-    attr_reader :days, :commits, :map, :notes
+    attr_reader :days, :commits, :map, :notes, :repo
     def self.max_count
       @max_count ||= 650
@@ -13,7 +11,7 @@ module Network
       @ref = ref
       @commit = commit
       @filter_ref = filter_ref
-      @repo = project.repo
+      @repo = project.repository
       @commits = collect_commits
       @days = index_commits
@@ -33,11 +31,9 @@ module Network
     # Get commits from repository
     #
     def collect_commits
-      refs_cache = build_refs_cache
-
       find_commits(count_to_display_commit_in_center).map do |commit|
         # Decorate with app/model/network/commit.rb
-        Network::Commit.new(commit, refs_cache[commit.id])
+        Network::Commit.new(commit)
       end
     end
@@ -103,14 +99,13 @@ module Network
     def find_commits(skip = 0)
       opts = {
-        date_order: true,
         max_count: self.class.max_count,
         skip: skip
       }
-      ref = @ref if @filter_ref
-      Grit::Commit.find_all(@repo, ref, opts)
+      opts[:ref] = @commit.id if @filter_ref
+      @repo.find_commits(opts)
     end
     def commits_sort_by_ref
@@ -126,15 +121,7 @@ module Network
     end
     def include_ref?(commit)
-      heads = commit.refs.select do |ref|
-        ref.is_a?(Grit::Head) or ref.is_a?(Grit::Remote) or ref.is_a?(Grit::Tag)
-      end
-
-      heads.map! do |head|
-        head.name
-      end
-
-      heads.include?(@ref)
+      commit.ref_names(@repo).include?(@ref)
     end
     def find_free_parent_spaces(commit)
@@ -282,14 +269,5 @@ module Network
         leaves.push(commit)
       end
     end
-
-    def build_refs_cache
-      refs_cache = {}
-      @repo.refs.each do |ref|
-        refs_cache[ref.commit.id] = [] unless refs_cache.include?(ref.commit.id)
-        refs_cache[ref.commit.id] << ref
-      end
-      refs_cache
-    end
   end
 end

app/views/projects/network/show.json.erb

@@ -13,7 +13,7 @@
         },
         time: c.time,
         space: c.spaces.first,
-        refs: get_refs(c),
+        refs: get_refs(@graph.repo, c),
         id: c.sha,
         date: c.date,
         message: c.message,