Add Redirection support for unmaintained branches and releases

Change-Id: I6329dd019173dd3eb8d479ef943ae50a619a85c7

openstack_releases/_redirections.py

@@ -30,14 +30,32 @@ def generate_constraints_redirections(_deliverables, _series_status_data,
         release_id = _series_status_data[deliv.series].release_id
         if not release_id:
             release_id = deliv.series
-        # Unless there is a specific stable branch
+        # Unless there is a stable or unmaintained branch
+        # Look at all branches We can't rely the ordering in the deliverable
+        # file
         for branch in deliv.branches:
-            if branch.name == 'stable/%s' % (release_id):
+            # Set the target when the branch is 'stable/'
+            # but ONLY If the target would otherwise be the master branch
+            if target == 'master' and branch.name == 'stable/%s' % (release_id):
+                target = branch.name
+            # An open unmaintained branch should become the target in
+            # preference over a master or stable branch
+            elif branch.name == 'unmaintained/%s' % (release_id):
                 target = branch.name
-                break
 
-        # Or we have a ${series}-eol tag
+        # After looking at all the branches we now look for ${series}-eom
+        # or a ${series}-eol tag
         for release in deliv.releases:
+            # an EOM release is a probable target.
+            if release.is_eom:
+                # Select the EOM tag instad of a master or stable branch.
+                # however if there is an unmaintained branch that's the
+                # expected target until the series is marked EOL
+                if target == 'master' or target == 'stable/%s' % (release_id):
+                    target = str(release.version)
+                    ref_type = 'tag'
+            # If a series is marked as EOL then we that tag is the correct
+            # destination, no options
             if release.is_eol:
                 target = str(release.version)
                 ref_type = 'tag'

openstack_releases/tests/test_redirections.py

@@ -108,6 +108,10 @@ class TestRedirections(base.BaseTestCase):
         series='mitaka',
         name='requirements',
         data=yamlutils.loads(textwrap.dedent('''
+        branches:
+          - name: stable/mitaka
+            location:
+              openstack/requirements: not_used
         releases:
           - projects:
               - hash: not_used
@@ -115,6 +119,49 @@ class TestRedirections(base.BaseTestCase):
             version: mitaka-eol
         '''))
     )
+    # Deliverable that looks like a closed (unmaintained) stable series
+    STABLE_EOM_EOL = deliverable.Deliverable(
+        team='requirements',
+        series='mitaka',
+        name='requirements',
+        data=yamlutils.loads(textwrap.dedent('''
+        branches:
+          - name: stable/mitaka
+            location:
+              openstack/requirements: not_used
+          - name: unmaintained/mitaka
+            location: mitaka-eom
+        releases:
+          - projects:
+              - hash: not_used
+                repo: openstack/requirements
+            version: mitaka-eom
+          - projects:
+              - hash: also_not_used
+                repo: openstack/requirements
+            version: mitaka-eol
+        '''))
+    )
+    # Deliverable that looks like a closed (unmaintained) stable series, but with
+    # an open 'unmaintained' branch
+    STABLE_EOM_UNMAINTAINED = deliverable.Deliverable(
+        team='requirements',
+        series='mitaka',
+        name='requirements',
+        data=yamlutils.loads(textwrap.dedent('''
+        branches:
+          - name: stable/mitaka
+            location:
+              openstack/requirements: not_used
+          - name: unmaintained/mitaka
+            location: mitaka-eom
+        releases:
+          - projects:
+              - hash: not_used
+                repo: openstack/requirements
+            version: mitaka-eom
+        '''))
+    )
 
     # Series status data
     SERIES_STATUS_DATA = series_status.SeriesStatus(
@@ -234,6 +281,24 @@ class TestRedirections(base.BaseTestCase):
                          generate_constraints_redirections(
                              deliverables, self.SERIES_STATUS_DATA))
 
+    def test_stable_eom(self):
+        deliverables = FakeDeliverables([
+            self.STABLE_EOM_EOL,
+        ])
+        self.assertEqual([dict(code=301, src='mitaka', ref_type='tag',
+                               dst='mitaka-eol')],
+                         generate_constraints_redirections(
+                             deliverables, self.SERIES_STATUS_DATA))
+
+    def test_stable_eom_unmaintained(self):
+        deliverables = FakeDeliverables([
+            self.STABLE_EOM_UNMAINTAINED,
+        ])
+        self.assertEqual([dict(code=301, src='mitaka', ref_type='branch',
+                               dst='unmaintained/mitaka')],
+                         generate_constraints_redirections(
+                             deliverables, self.SERIES_STATUS_DATA))
+
     def test_all(self):
         deliverables = FakeDeliverables([
             self.STABLE_EOL,
@@ -254,3 +319,5 @@ class TestRedirections(base.BaseTestCase):
         self.assertEqual([],
                          generate_constraints_redirections(
                              deliverables, self.SERIES_STATUS_DATA))
+
+    # FIXME(tonyb): Add testcase for future_releases