### Problem to solve https://gitlab.com/gitlab-org/gitlab-ce/merge_requests/22084 implements basic debug logging. But when enabled it's very verbose and there's only one level - all or nothing. ### Proposal Change `QA_DEBUG` to `QA_LOG_LEVEL` and allow the value to set `Logger`'s log level. If no value is set, logging is disabled. E.g., based on what @godfat [proposed](https://gitlab.com/gitlab-org/gitlab-ce/merge_requests/22084#note_109839557): ```ruby @logger.level = ::Logger.const_get((ENV['QA_LOG_LEVEL'] || 'DEBUG').upcase) ``` > ...If nothing set, no log. If it's set, it should be either DEBUG, INFO, and so on. For consistency we may want to use `Runtime::Env` instead of accessing `ENV` directly