gitlab-org--gitlab-foss/app/services/validate_new_branch_service.rb

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require_relative 'base_service'
class ValidateNewBranchService < BaseService
def execute(branch_name)
valid_branch = Gitlab::GitRefValidator.validate(branch_name)
unless valid_branch
return error('Branch name is invalid')
end
repository = project.repository
existing_branch = repository.find_branch(branch_name)
if existing_branch
return error('Branch already exists')
end
success
rescue GitHooksService::PreReceiveError => ex
error(ex.message)
end
end