multibranch-bitbucket: discover strategies

Can specify discover-branch and discover-pr-origin strategies. Changes
are based on existing code for multibranch-github implementation.

Change-Id: I8e5e29df9d04339c19a61180143bc0e14395aa58

jenkins_jobs/modules/project_multibranch.py

@@ -305,6 +305,13 @@ def bitbucket_scm(xml_parent, data):
     :arg str head-filter-regex: A regular expression for filtering
         discovered source branches. Requires the :jenkins-wiki:`SCM API Plugin
         <SCM+API+Plugin>`.
+    :arg str discovery-branch: Discovers branches on the repository.
+        Valid options: ex-pr, only-pr, all.
+        Value is not specified by default.
+    :arg str discover-pr-origin: Discovers pull requests where the origin
+        repository is the same as the target repository.
+        Valid options: mergeOnly, headOnly, mergeAndHead.
+        Value is not specified by default.
 
     Minimal Example:
 
@@ -344,6 +351,35 @@ def bitbucket_scm(xml_parent, data):
             'jenkins.scm.impl.trait.RegexSCMHeadFilterTrait')
         XML.SubElement(rshf, 'regex').text = data.get('head-filter-regex')
 
+    if data.get('discover-pr-origin', None):
+        dpro = XML.SubElement(traits,
+            'com.cloudbees.jenkins.plugins.bitbucket'
+            '.OriginPullRequestDiscoveryTrait')
+        dpro_strategies = {
+            'mergeOnly': '1',
+            'headOnly': '2',
+            'mergeAndHead': '3'
+        }
+        dpro_mapping = [
+            ('discover-pr-origin', 'strategyId', None, dpro_strategies)
+        ]
+        helpers.convert_mapping_to_xml(
+            dpro, data, dpro_mapping, fail_required=True)
+
+    if data.get('discover-branch', None):
+        dbr = XML.SubElement(traits,
+            'com.cloudbees.jenkins.plugins.bitbucket.BranchDiscoveryTrait')
+        dbr_strategies = {
+            'ex-pr': '1',
+            'only-pr': '2',
+            'all': '3'
+        }
+        dbr_mapping = [
+            ('discover-branch', 'strategyId', None, dbr_strategies)
+        ]
+        helpers.convert_mapping_to_xml(
+            dbr, data, dbr_mapping, fail_required=True)
+
 
 def gerrit_scm(xml_parent, data):
     """Configure Gerrit SCM

tests/multibranch/fixtures/scm_bitbucket_full.xml

@@ -42,6 +42,12 @@
             <jenkins.scm.impl.trait.RegexSCMHeadFilterTrait>
               <regex>master|\d+\.\d+</regex>
             </jenkins.scm.impl.trait.RegexSCMHeadFilterTrait>
+            <com.cloudbees.jenkins.plugins.bitbucket.OriginPullRequestDiscoveryTrait>
+              <strategyId>2</strategyId>
+            </com.cloudbees.jenkins.plugins.bitbucket.OriginPullRequestDiscoveryTrait>
+            <com.cloudbees.jenkins.plugins.bitbucket.BranchDiscoveryTrait>
+              <strategyId>3</strategyId>
+            </com.cloudbees.jenkins.plugins.bitbucket.BranchDiscoveryTrait>
           </traits>
         </source>
       </jenkins.branch.BranchSource>

tests/multibranch/fixtures/scm_bitbucket_full.yaml

@@ -9,3 +9,6 @@ scm:
         server-url: https://bitbucket.example.com:8080
         discover-tags: true
         head-filter-regex: 'master|\d+\.\d+'
+        discover-pr-origin: headOnly
+        discover-branch: all
+