Add support for Jira ticket mentions in format JIRA-123.

Signed-off-by: Dmitriy Zaporozhets <dmitriy.zaporozhets@gmail.com>

Conflicts:
	CHANGELOG-EE

doc/integration/external-issue-tracker.md

@@ -2,8 +2,8 @@ GitLab has a great issue tracker but you can also use an external issue tracker
 
 - the 'Issues' link on the GitLab project pages takes you to the appropriate JIRA issue index;
 - clicking 'New issue' on the project dashboard creates a new JIRA issue;
-- To reference JIRA issue PROJECT-1234 in comments, use syntax #PROJECT-1234. Commit messages get turned into HTML links to the corresponding JIRA issue.
+- To reference JIRA issue PROJECT-1234 in comments, use syntax PROJECT-1234. Commit messages get turned into HTML links to the corresponding JIRA issue.
 
 ![jira screenshot](jira-integration-points.png)
 
-You can configure the integration in the gitlab.yml configuration file.
+You can configure the integration in the gitlab.yml configuration file.
\ No newline at end of file

lib/gitlab/markdown.rb

@@ -98,6 +98,7 @@ module Gitlab
       (?<prefix>\W)?                         # Prefix
       (                                      # Reference
          @(?<user>[a-zA-Z][a-zA-Z0-9_\-\.]*) # User name
+        |(?<issue>([A-Z\-]+-)\d+)            # JIRA Issue ID
         |\#(?<issue>([a-zA-Z\-]+-)?\d+)      # Issue ID
         |!(?<merge_request>\d+)              # MR ID
         |\$(?<snippet>\d+)                   # Snippet ID
@@ -172,11 +173,15 @@ module Gitlab
     end
 
     def reference_issue(identifier)
-      if @project.issue_exists? identifier
-        url = url_for_issue(identifier)
-        title = title_for_issue(identifier)
+      if @project.used_default_issues_tracker? || !external_issues_tracker_enabled?
+        if @project.issue_exists? identifier
+          url = url_for_issue(identifier)
+          title = title_for_issue(identifier)
 
-        link_to("##{identifier}", url, html_options.merge(title: "Issue: #{title}", class: "gfm gfm-issue #{html_options[:class]}"))
+          link_to("##{identifier}", url, html_options.merge(title: "Issue: #{title}", class: "gfm gfm-issue #{html_options[:class]}"))
+        end
+      else
+        reference_jira_issue(identifier) if @project.issues_tracker == "jira"
       end
     end
 
@@ -197,5 +202,12 @@ module Gitlab
         link_to(identifier, project_commit_url(@project, commit), html_options.merge(title: commit.link_title, class: "gfm gfm-commit #{html_options[:class]}"))
       end
     end
+
+    def reference_jira_issue(identifier)
+      url = url_for_issue(identifier)
+      title = Gitlab.config.issues_tracker[@project.issues_tracker]["title"]
+
+      link_to("#{identifier}", url, html_options.merge(title: "Issue in #{title}", class: "gfm gfm-issue #{html_options[:class]}"))
+    end
   end
 end

spec/helpers/gitlab_markdown_helper_spec.rb

@@ -181,6 +181,52 @@ describe GitlabMarkdownHelper do
       include_examples 'referenced object'
     end
 
+    describe "referencing a Jira issue" do
+      let(:actual)   { "Reference to JIRA-#{issue.iid}" }
+      let(:expected) { "http://jira.example/browse/JIRA-#{issue.iid}" }
+      let(:reference) { "JIRA-#{issue.iid}" }
+
+      before do
+        hash = { "jira" => { "title" => "JIRA tracker", "issues_url" => "http://jira.example/browse/:id" } }
+        Gitlab.config.stub(:issues_tracker).and_return(hash)
+        @project.stub(:issues_tracker).and_return("jira")
+        @project.stub(:issues_tracker_id).and_return("JIRA")
+      end
+
+      it "should link using a valid id" do
+        gfm(actual).should match(expected)
+      end
+
+      it "should link with adjacent text" do
+        # Wrap the reference in parenthesis
+        gfm(actual.gsub(reference, "(#{reference})")).should match(expected)
+
+        # Append some text to the end of the reference
+        gfm(actual.gsub(reference, "#{reference}, right?")).should match(expected)
+      end
+
+      it "should keep whitespace intact" do
+        actual   = "Referenced #{reference} already."
+        expected = /Referenced <a.+>[^\s]+<\/a> already/
+        gfm(actual).should match(expected)
+      end
+
+      it "should not link with an invalid id" do
+        # Modify the reference string so it's still parsed, but is invalid
+        invalid_reference = actual.gsub(/(\d+)$/, "r45")
+        gfm(invalid_reference).should == invalid_reference
+      end
+
+      it "should include a title attribute" do
+        title = "Issue in JIRA tracker"
+        gfm(actual).should match(/title="#{title}"/)
+      end
+
+      it "should include standard gfm classes" do
+        gfm(actual).should match(/class="\s?gfm gfm-issue\s?"/)
+      end
+    end
+
     describe "referencing a merge request" do
       let(:object)    { merge_request }
       let(:reference) { "!#{merge_request.iid}" }

spec/lib/gitlab/reference_extractor_spec.rb

@@ -11,6 +11,12 @@ describe Gitlab::ReferenceExtractor do
     subject.issues.should == ["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"]
+  end
+
   it 'extracts merge request references' do
     subject.analyze "and here's !43, a merge request"
     subject.merge_requests.should == ["43"]