Add support for project-level MR approval configuration

3 files changed, 81 insertions, 2 deletions

diff --git a/docs/gl_objects/mr_approvals.rst b/docs/gl_objects/mr_approvals.rst
new file mode 100644
index 0000000..69d44a5
--- /dev/null
+++ b/docs/gl_objects/mr_approvals.rst
@@ -0,0 +1,30 @@
+##############################################
+Project-level merge request approvals settings
+##############################################
+
+References
+----------
+
+* v4 API:
+
+  + :class:`gitlab.v4.objects.ProjectApproval`
+  + :class:`gitlab.v4.objects.ProjectApprovalManager`
+  + :attr:`gitlab.v4.objects.Project.approvals`
+
+* GitLab API: https://docs.gitlab.com/ee/api/merge_request_approvals.html#project-level-mr-approvals
+
+Examples
+--------
+
+Get project-level MR approvals settings::
+
+    mras = project.approvals.get()
+
+Change project-level MR approvals settings::
+
+    mras.approvals_before_merge = 2
+    mras.save()
+
+Change project-level MR allowed approvers::
+
+	project.approvals.set_approvers(approver_ids = [105], approver_group_ids=[653, 654])
diff --git a/gitlab/mixins.py b/gitlab/mixins.py
index 966a647..59fcf1b 100644
--- a/gitlab/mixins.py
+++ b/gitlab/mixins.py
@@ -223,6 +223,18 @@ class UpdateMixin(object):
         """
         return getattr(self, '_update_attrs', (tuple(), tuple()))
 
+    def _get_update_method(self):
+        """Return the HTTP method to use.
+
+        Returns:
+            object: http_put (default) or http_post
+        """
+        if getattr(self, '_update_uses_post', False):
+            http_method = self.gitlab.http_post
+        else:
+            http_method = self.gitlab.http_put
+        return http_method
+
     @exc.on_http_error(exc.GitlabUpdateError)
     def update(self, id=None, new_data={}, **kwargs):
         """Update an object on the server.
@@ -265,8 +277,8 @@ class UpdateMixin(object):
                     else:
                         new_data[attr_name] = type_obj.get_for_api()
 
-        return self.gitlab.http_put(path, post_data=new_data, files=files,
-                                    **kwargs)
+        http_method = self._get_update_method()
+        return http_method(path, post_data=new_data, files=files, **kwargs)
 
 
 class SetMixin(object):
diff --git a/gitlab/v4/objects.py b/gitlab/v4/objects.py
index 13c9995..d6ae6c5 100644
--- a/gitlab/v4/objects.py
+++ b/gitlab/v4/objects.py
@@ -2631,6 +2631,42 @@ class ProjectAccessRequestManager(ListMixin, CreateMixin, DeleteMixin,
     _from_parent_attrs = {'project_id': 'id'}
 
 
+class ProjectApproval(SaveMixin, RESTObject):
+    _id_attr = None
+
+
+class ProjectApprovalManager(GetWithoutIdMixin, UpdateMixin, RESTManager):
+    _path = '/projects/%(project_id)s/approvals'
+    _obj_cls = ProjectApproval
+    _from_parent_attrs = {'project_id': 'id'}
+    _update_attrs = (tuple(),
+                     ('approvals_before_merge', 'reset_approvals_on_push',
+                      'disable_overriding_approvers_per_merge_request'))
+    _update_uses_post = True
+
+    @exc.on_http_error(exc.GitlabUpdateError)
+    def set_approvers(self, approver_ids=[], approver_group_ids=[],
+                      **kwargs):
+        """Change project-level allowed approvers and approver groups.
+
+        Args:
+            approver_ids (list): User IDs that can approve MRs.
+            approver_group_ids (list): Group IDs whose members can approve MRs.
+
+        Raises:
+            GitlabAuthenticationError: If authentication is not correct
+            GitlabUpdateError: If the server failed to perform the request
+        """
+
+        path = '/projects/%s/approvers' % self._parent.get_id()
+        data = {'approver_ids': approver_ids,
+                'approver_group_ids': approver_group_ids}
+        try:
+            self.gitlab.http_put(path, post_data=data, **kwargs)
+        except exc.GitlabHttpError as e:
+                raise exc.GitlabUpdateError(e.response_code, e.error_message)
+
+
 class ProjectDeployment(RESTObject):
     pass
 
@@ -2729,6 +2765,7 @@ class Project(SaveMixin, ObjectDeleteMixin, RESTObject):
     _short_print_attr = 'path'
     _managers = (
         ('accessrequests', 'ProjectAccessRequestManager'),
+        ('approvals', 'ProjectApprovalManager'),
         ('badges', 'ProjectBadgeManager'),
         ('boards', 'ProjectBoardManager'),
         ('branches', 'ProjectBranchManager'),