update project if certain params changed

awx/main/models/projects.py

@@ -241,6 +241,7 @@ class Project(UnifiedJobTemplate, ProjectOptions, ResourceMixin, CustomVirtualEn
     SOFT_UNIQUE_TOGETHER = [('polymorphic_ctype', 'name', 'organization')]
     FIELDS_TO_PRESERVE_AT_COPY = ['labels', 'instance_groups', 'credentials']
     FIELDS_TO_DISCARD_AT_COPY = ['local_path']
+    FIELDS_TRIGGER_UPDATE = frozenset(['scm_url', 'scm_branch', 'scm_type'])
 
     class Meta:
         app_label = 'main'
@@ -323,6 +324,11 @@ class Project(UnifiedJobTemplate, ProjectOptions, ResourceMixin, CustomVirtualEn
             ['name', 'description', 'schedule']
         )
 
+    def __init__(self, *args, **kwargs):
+        r = super(Project, self).__init__(*args, **kwargs)
+        self._prior_values_store = self._current_sensitive_fields()
+        return r
+
     def save(self, *args, **kwargs):
         new_instance = not bool(self.pk)
         # If update_fields has been specified, add our field names to it,
@@ -354,9 +360,22 @@ class Project(UnifiedJobTemplate, ProjectOptions, ResourceMixin, CustomVirtualEn
                 with disable_activity_stream():
                     self.save(update_fields=update_fields)
         # If we just created a new project with SCM, start the initial update.
-        if new_instance and self.scm_type and not skip_update:
+        # also update if certain fields have changed
+        relevant_change = False
+        new_values = self._current_sensitive_fields()
+        if hasattr(self, '_prior_values_store') and self._prior_values_store != new_values:
+            relevant_change = True
+        self._prior_values_store = new_values
+        if (relevant_change or new_instance) and (not skip_update) and self.scm_type:
             self.update()
 
+    def _current_sensitive_fields(self):
+        new_values = {}
+        for attr, val in self.__dict__.items():
+            if attr in Project.FIELDS_TRIGGER_UPDATE:
+                new_values[attr] = val
+        return new_values
+
     def _get_current_status(self):
         if self.scm_type:
             if self.current_job and self.current_job.status:

awx/main/tests/functional/models/test_project.py

@@ -0,0 +1,33 @@
+import pytest
+import mock
+
+from awx.main.models import Project
+
+
+@pytest.mark.django_db
+def test_project_initial_update():
+    with mock.patch.object(Project, "update") as mock_update:
+        Project.objects.create(name='foo', scm_type='git')
+    mock_update.assert_called_once_with()
+
+
+@pytest.mark.django_db
+def test_does_not_update_nonsensitive_change(project):
+    with mock.patch.object(Project, "update") as mock_update:
+        project.scm_update_on_launch = not project.scm_update_on_launch
+        project.save()
+    mock_update.assert_not_called()
+
+
+@pytest.mark.django_db
+def test_sensitive_change_triggers_update(project):
+    with mock.patch.object(Project, "update") as mock_update:
+        project.scm_url = 'https://foo.invalid'
+        project.save()
+    mock_update.assert_called_once_with()
+    # test other means of initialization
+    project = Project.objects.get(pk=project.pk)
+    with mock.patch.object(Project, "update") as mock_update:
+        project.scm_url = 'https://foo2.invalid'
+        project.save()
+    mock_update.assert_called_once_with()

awx/main/tests/functional/task_management/test_scheduler.py

@@ -113,7 +113,7 @@ def test_single_job_dependencies_project_launch(default_instance_group, job_temp
     p.scm_update_cache_timeout = 0
     p.scm_type = "git"
     p.scm_url = "http://github.com/ansible/ansible.git"
-    p.save()
+    p.save(skip_update=True)
     with mock.patch("awx.main.scheduler.TaskManager.start_task"):
         tm = TaskManager()
         with mock.patch.object(TaskManager, "create_project_update", wraps=tm.create_project_update) as mock_pu: