package metadata diff doesn't work between revisions 0 and 1

[dmach]

/source/<project>/<package>?cmd=diff&&orev=0&rev=1&meta=1 doesn't work
The same request with meta=0 works fine.

See:
osc api -X POST 'https://api.opensuse.org/source/openSUSE:Tools/osc?cmd=diff&expand=1&orev=0&rev=1&meta=1'
osc api -X POST 'https://api.opensuse.org/source/openSUSE:Tools/osc?cmd=diff&expand=1&orev=0&rev=1&meta=0'

[eduardoj]

That endpoint works as it is defined by the backend. The frontend only passes the request directly to the backend.

Code of the frontend passing it to the backend:

open-build-service/src/api/app/controllers/source_controller.rb

Lines 917 to 927 in f550863

	# POST /source/<project>/<package>?cmd=diff
	def package_command_diff
	# oproject_name = params[:oproject]
	# opackage_name = params[:opackage]
	path = request.path_info
	path += build_query_from_hash(params, %i[cmd rev orev oproject opackage expand linkrev olinkrev
	unified missingok meta file filelimit tarlimit
	view withissues onlyissues cacheonly nodiff])
	pass_to_backend(path)
	end

Code of the backend endpoint:

• open-build-service/src/backend/bs_srcserver

  Line 7778 in f550863

  'POST:/source/$project/$package cmd=diff rev? orev:rev? oproject:project? opackage:package? expand:bool? linkrev? olinkrev:? unified:bool? missingok:bool? meta:bool? file:filename* filelimit:num? tarlimit:num? view:? withissues:bool? onlyissues:bool? nocache:bool? cacheonly:bool? nodiff:bool?' => \&sourcediff,

• open-build-service/src/backend/bs_srcserver

  Line 3208 in f550863

  sub sourcediff {