g1smd

A code review tool is used to propose changes to the code and metadata and to review and comment on proposed changes.

When everyone is in agreement, the internal Google version is updated with the proposed changes.

Once testing is complete, the java code and metadata is pushed to the public version.

The final steps are to produce the javascript port, and on a less regular basis the .jar file in the "downloads" section is also updated.

This stuff is non-trivial. I'll guess that I have spent in excess of 50 hours working on just the UK data in the last couple of months.

The problem is this. Although there are hundreds of websites with UK area code lists, almost all of them are either incorrect, out of date, full of typos, or are generally unreliable. Even lists from "official" sources cannot be relied on with any degree of certainty. The obvious errors are easy to find and correct. It took a long time to find out there were many non-obvious errors and there are likely more errors still to be uncovered.

Ruby port of libphonenumber...

https://github.com/habermann24/libphonenumber-ruby/