PR Builder GitLab Integration

[saadmk11]

ref: #6052

[ericholscher]

This looks good. A few small nits, but I think it's close.

[ericholscher]

Where is this ParseError handled?

[saadmk11]

When there is a ParseError we return 400 to the API. We do the same thing for the push events.

readthedocs.org/readthedocs/api/v2/views/integrations.py

Lines 468 to 472 in e53af66

	try:
	branches = [self._normalize_ref(data['ref'])]
	return self.get_response_push(self.project, branches)
	except KeyError:
	raise ParseError('Parameter "ref" is required')

[ericholscher]

👍