Track projects in ReferenceExtractor

Store both the project and identifier of extracted references.  This
prevents `ReferenceExtractor` from returning objects in the wrong
project for cross-project references.

app/models/concerns/mentionable.rb

@@ -67,7 +67,7 @@ module Mentionable
   def references(p = project, text = mentionable_text)
     return [] if text.blank?
     ext = Gitlab::ReferenceExtractor.new
-    ext.analyze(text)
+    ext.analyze(text, p)
     (ext.issues_for(p) + ext.merge_requests_for(p) + ext.commits_for(p)).uniq - [local_reference]
   end

lib/gitlab/closing_issue_extractor.rb

@@ -6,7 +6,7 @@ module Gitlab
       md = ISSUE_CLOSING_REGEX.match(message)
       if md
         extractor = Gitlab::ReferenceExtractor.new
-        extractor.analyze(md[0])
+        extractor.analyze(md[0], project)
         extractor.issues_for(project)
       else
         []

lib/gitlab/reference_extractor.rb

@@ -9,51 +9,63 @@ module Gitlab
       @users, @issues, @merge_requests, @snippets, @commits = [], [], [], [], []
     end
-    def analyze(string)
-      parse_references(string.dup)
+    def analyze(string, project)
+      parse_references(string.dup, project)
     end
     # Given a valid project, resolve the extracted identifiers of the requested type to
     # model objects.
     def users_for(project)
-      users.map do |identifier|
-        project.users.where(username: identifier).first
+      users.map do |entry|
+        project.users.where(username: entry[:id]).first
       end.reject(&:nil?)
     end
-    def issues_for(project)
-      issues.map do |identifier|
-        project.issues.where(iid: identifier).first
+    def issues_for(project = nil)
+      issues.map do |entry|
+        if should_lookup?(project, entry[:project])
+          entry[:project].issues.where(iid: entry[:id]).first
+        end
       end.reject(&:nil?)
     end
-    def merge_requests_for(project)
-      merge_requests.map do |identifier|
-        project.merge_requests.where(iid: identifier).first
+    def merge_requests_for(project = nil)
+      merge_requests.map do |entry|
+        if should_lookup?(project, entry[:project])
+          entry[:project].merge_requests.where(iid: entry[:id]).first
+        end
       end.reject(&:nil?)
     end
     def snippets_for(project)
-      snippets.map do |identifier|
-        project.snippets.where(id: identifier).first
+      snippets.map do |entry|
+        project.snippets.where(id: entry[:id]).first
       end.reject(&:nil?)
     end
-    def commits_for(project)
-      repo = project.repository
-      return [] if repo.nil?
-
-      commits.map do |identifier|
-        repo.commit(identifier)
+    def commits_for(project = nil)
+      commits.map do |entry|
+        repo = entry[:project].repository if entry[:project]
+        if should_lookup?(project, entry[:project])
+          repo.commit(entry[:id]) if repo
+        end
       end.reject(&:nil?)
     end
     private
-    def reference_link(type, identifier, _, _)
+    def reference_link(type, identifier, project, _)
       # Append identifier to the appropriate collection.
-      send("#{type}s") << identifier
+      send("#{type}s") << { project: project, id: identifier }
+    end
+
+    def should_lookup?(project, entry_project)
+      if entry_project.nil?
+        false
+      else
+        project.nil? || project.id == entry_project.id
+      end
     end
   end
 end

spec/lib/gitlab/reference_extractor_spec.rb

@@ -2,45 +2,48 @@ require 'spec_helper'
 describe Gitlab::ReferenceExtractor do
   it 'extracts username references' do
-    subject.analyze "this contains a @user reference"
-    subject.users.should == ["user"]
+    subject.analyze('this contains a @user reference', nil)
+    subject.users.should == [{ project: nil, id: 'user' }]
   end
   it 'extracts issue references' do
-    subject.analyze "this one talks about issue #1234"
-    subject.issues.should == ["1234"]
+    subject.analyze('this one talks about issue #1234', nil)
+    subject.issues.should == [{ project: nil, id: '1234' }]
   end
   it 'extracts JIRA issue references' do
-    Gitlab.config.gitlab.stub(:issues_tracker).and_return("jira")
-    subject.analyze "this one talks about issue JIRA-1234"
-    subject.issues.should == ["JIRA-1234"]
+    Gitlab.config.gitlab.stub(:issues_tracker).and_return('jira')
+    subject.analyze('this one talks about issue JIRA-1234', nil)
+    subject.issues.should == [{ project: nil, id: 'JIRA-1234' }]
   end
   it 'extracts merge request references' do
-    subject.analyze "and here's !43, a merge request"
-    subject.merge_requests.should == ["43"]
+    subject.analyze("and here's !43, a merge request", nil)
+    subject.merge_requests.should == [{ project: nil, id: '43' }]
   end
   it 'extracts snippet ids' do
-    subject.analyze "snippets like $12 get extracted as well"
-    subject.snippets.should == ["12"]
+    subject.analyze('snippets like $12 get extracted as well', nil)
+    subject.snippets.should == [{ project: nil, id: '12' }]
   end
   it 'extracts commit shas' do
-    subject.analyze "commit shas 98cf0ae3 are pulled out as Strings"
-    subject.commits.should == ["98cf0ae3"]
+    subject.analyze('commit shas 98cf0ae3 are pulled out as Strings', nil)
+    subject.commits.should == [{ project: nil, id: '98cf0ae3' }]
   end
   it 'extracts multiple references and preserves their order' do
-    subject.analyze "@me and @you both care about this"
-    subject.users.should == ["me", "you"]
+    subject.analyze('@me and @you both care about this', nil)
+    subject.users.should == [
+      { project: nil, id: 'me' },
+      { project: nil, id: 'you' }
+    ]
   end
   it 'leaves the original note unmodified' do
-    text = "issue #123 is just the worst, @user"
-    subject.analyze text
-    text.should == "issue #123 is just the worst, @user"
+    text = 'issue #123 is just the worst, @user'
+    subject.analyze(text, nil)
+    text.should == 'issue #123 is just the worst, @user'
   end
   it 'handles all possible kinds of references' do
@@ -59,7 +62,7 @@ describe Gitlab::ReferenceExtractor do
       project.team << [@u_foo, :reporter]
       project.team << [@u_bar, :guest]
-      subject.analyze "@foo, @baduser, @bar, and @offteam"
+      subject.analyze('@foo, @baduser, @bar, and @offteam', project)
       subject.users_for(project).should == [@u_foo, @u_bar]
     end
@@ -67,7 +70,7 @@ describe Gitlab::ReferenceExtractor do
       @i0 = create(:issue, project: project)
       @i1 = create(:issue, project: project)
-      subject.analyze "##{@i0.iid}, ##{@i1.iid}, and #999."
+      subject.analyze("##{@i0.iid}, ##{@i1.iid}, and #999.", project)
       subject.issues_for(project).should == [@i0, @i1]
     end
@@ -75,7 +78,7 @@ describe Gitlab::ReferenceExtractor do
       @m0 = create(:merge_request, source_project: project, target_project: project, source_branch: 'aaa')
       @m1 = create(:merge_request, source_project: project, target_project: project, source_branch: 'bbb')
-      subject.analyze "!999, !#{@m1.iid}, and !#{@m0.iid}."
+      subject.analyze("!999, !#{@m1.iid}, and !#{@m0.iid}.", project)
       subject.merge_requests_for(project).should == [@m1, @m0]
     end
@@ -84,14 +87,15 @@ describe Gitlab::ReferenceExtractor do
       @s1 = create(:project_snippet, project: project)
       @s2 = create(:project_snippet)
-      subject.analyze "$#{@s0.id}, $999, $#{@s2.id}, $#{@s1.id}"
+      subject.analyze("$#{@s0.id}, $999, $#{@s2.id}, $#{@s1.id}", project)
       subject.snippets_for(project).should == [@s0, @s1]
     end
     it 'accesses valid commits' do
-      commit = project.repository.commit("master")
-      subject.analyze "this references commits #{commit.sha[0..6]} and 012345"
+      commit = project.repository.commit('master')
+      subject.analyze("this references commits #{commit.sha[0..6]} and 012345",
+                      project)
       extracted = subject.commits_for(project)
       extracted.should have(1).item
       extracted[0].sha.should == commit.sha