* Implementation for calculating language statistics
Impement saving code language statistics to database
Implement rendering langauge stats
Add primary laguage to show in repository list
Implement repository stats indexer queue
Add indexer test
Refactor to use queue module
* Do not timeout for queues
* Wrap the code indexer
In order to prevent a data race in the code indexer it must be wrapped
with a holder otherwise it is possible to Search/Index on an
incompletely initialised indexer, and search will fail with a nil
pointer until the repository indexer is initialised.
Further a completely initialised repository indexer should not be closed
until Termination otherwise actions in Hammer/Shutdown phases could
block or be lost.
Finally, there is a complex dance of shutdown etiquette should the index
initialisation fail. This PR restores that.
* Always return err if closed whilst waiting
Co-authored-by: techknowlogick <matti@mdranta.net>
