Hi everybody,

Recently, there was opened this ticket:


In short, there are some issues with -doc noarch subpackages, which are not precisely identical coming from different builders, due to embedded timestamps. As it turns out, there is SOURCE_DATE_EPOCH environment variable available in RDoc, which allows to specify the timestamp and therefore workaround the issue. And I think this could be useful for our packages, therefore I created this PR:


It modifies %gem_install macro and sets the timestamp for each gem. Is there any reason, why not merge this PR?