Add support for project and group custom variables

implements parts of #367

4 files changed, 80 insertions, 34 deletions

diff --git a/docs/gl_objects/groups.rst b/docs/gl_objects/groups.rst
index 9006ceb..9b5edb0 100644
--- a/docs/gl_objects/groups.rst
+++ b/docs/gl_objects/groups.rst
@@ -91,6 +91,41 @@ List the subgroups for a group::
 
     subgroups = group.subgroups.list()
 
+Group custom attributes
+=======================
+
+Reference
+---------
+
+* v4 API:
+
+  + :class:`gitlab.v4.objects.GroupCustomAttribute`
+  + :class:`gitlab.v4.objects.GroupCustomAttributeManager`
+  + :attr:`gitlab.v4.objects.Group.customattributes`
+
+* GitLab API: https://docs.gitlab.com/ce/api/custom_attributes.html
+
+Examples
+--------
+
+List custom attributes for a group::
+
+    attrs = group.customattributes.list()
+
+Get a custom attribute for a group::
+
+    attr = group.customattributes.get(attr_key)
+
+Set (create or update) a custom attribute for a group::
+
+    attr = group.customattributes.set(attr_key, attr_value)
+
+Delete a custom attribute for a group::
+
+    attr.delete()
+    # or
+    group.customattributes.delete(attr_key)
+
 Group members
 =============
 
diff --git a/docs/gl_objects/projects.rst b/docs/gl_objects/projects.rst
index aaf0699..b7c5d78 100644
--- a/docs/gl_objects/projects.rst
+++ b/docs/gl_objects/projects.rst
@@ -172,6 +172,41 @@ Get a list of users for the repository:
    :start-after: # users list
    :end-before: # end users list
 
+Project custom attributes
+=========================
+
+Reference
+---------
+
+* v4 API:
+
+  + :class:`gitlab.v4.objects.ProjectCustomAttribute`
+  + :class:`gitlab.v4.objects.ProjectCustomAttributeManager`
+  + :attr:`gitlab.v4.objects.Project.customattributes`
+
+* GitLab API: https://docs.gitlab.com/ce/api/custom_attributes.html
+
+Examples
+--------
+
+List custom attributes for a project::
+
+    attrs = project.customattributes.list()
+
+Get a custom attribute for a project::
+
+    attr = project.customattributes.get(attr_key)
+
+Set (create or update) a custom attribute for a project::
+
+    attr = project.customattributes.set(attr_key, attr_value)
+
+Delete a custom attribute for a project::
+
+    attr.delete()
+    # or
+    project.customattributes.delete(attr_key)
+
 Project files
 =============
 
diff --git a/docs/gl_objects/users.py b/docs/gl_objects/users.py
index e452217..842e35d 100644
--- a/docs/gl_objects/users.py
+++ b/docs/gl_objects/users.py
@@ -98,24 +98,6 @@ gl.auth()
 current_user = gl.user
 # end currentuser get
 
-# ca list
-attrs = user.customeattributes.list()
-# end ca list
-
-# ca get
-attr = user.customeattributes.get(attr_key)
-# end ca get
-
-# ca set
-attr = user.customeattributes.set(attr_key, attr_value)
-# end ca set
-
-# ca delete
-attr.delete()
-# or
-user.customeattributes.delete(attr_key)
-# end ca delete
-
 # it list
 i_t = user.impersonationtokens.list(state='active')
 i_t = user.impersonationtokens.list(state='inactive')
diff --git a/docs/gl_objects/users.rst b/docs/gl_objects/users.rst
index e520c9b..e57daf6 100644
--- a/docs/gl_objects/users.rst
+++ b/docs/gl_objects/users.rst
@@ -89,29 +89,23 @@ References
 Examples
 --------
 
-List custom attributes for a user:
+List custom attributes for a user::
 
-.. literalinclude:: users.py
-   :start-after: # ca list
-   :end-before: # end ca list
+    attrs = user.customattributes.list()
 
-Get a custom attribute for a user:
+Get a custom attribute for a user::
 
-.. literalinclude:: users.py
-   :start-after: # ca get
-   :end-before: # end ca get
+    attr = user.customattributes.get(attr_key)
 
-Set (create or update) a custom attribute for a user:
+Set (create or update) a custom attribute for a user::
 
-.. literalinclude:: users.py
-   :start-after: # ca set
-   :end-before: # end ca set
+    attr = user.customattributes.set(attr_key, attr_value)
 
-Delete a custom attribute for a user:
+Delete a custom attribute for a user::
 
-.. literalinclude:: users.py
-   :start-after: # ca list
-   :end-before: # end ca list
+    attr.delete()
+    # or
+    user.customattributes.delete(attr_key)
 
 User impersonation tokens
 =========================