Data

The formats and subdivisions are those of commerceguys/addressing, under the MIT License; that library first generated them from Google's Address Data Service and maintains them. Data\DataImporter writes them as PHP files in data/: formats/<country>.php, formats/ZZ.php for the countries without a format of their own, and subdivisions/<list>.php, named as commerceguys/addressing names its files. The release imported is in data/VERSION; the library reads them only, at run time, and never depends on commerceguys/addressing.

Country names are not imported: symfony/intl gives them, in every language it has.

Updating

1. Check out commerceguys/addressing at a release tag.
2. php bin/import-data.php path/to/addressing: its formats are read through its own repository class, loaded from that checkout only. DataImporter writes every file in a staging folder first and only then puts it in place of data/formats/ and data/subdivisions/: data it refuses halfway leave the data already there untouched.
3. Write the tag in data/VERSION, and in the CHANGELOG.
4. Run the tests: a format that changed may change a test, which then follows the data.