Add an opt-in PostgreSQL backend for the webtiles user database - #1
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Large or multi-host webtiles deployments need one shared account database,
which the per-server SQLite files cannot provide. This adds a second backend
behind the same userdb.py function surface, selected with
userdb_backend = "postgresql" and userdb_dsn. The default stays SQLite and
servers that do not set the new options are unaffected; psycopg is imported
only when the backend is selected and ships as an optional requirements file.
The existing SQLite queries are rewritten at execute time (pg_sql):
placeholders, the COLLATE NOCASE/RTRIM clauses (citext columns provide the
case-insensitive matching and unique usernames), datetime('now') forms, and
the mutesettings upsert. Schema is created on first start with IF NOT EXISTS.
userdb_test.py reruns the whole UserDBTest suite against a live server when
WEBTILES_TEST_POSTGRESQL_DSN is set, plus unit tests for the rewrite rules
that always run.
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Large or multi-host webtiles deployments need one shared account database, which the per-server SQLite files cannot provide. This adds a second backend behind the same
userdb.pyfunction surface, selected withuserdb_backend = "postgresql"anduserdb_dsn.psycopgis imported only when the backend is selected and ships as an optional requirements file (requirements/postgresql.py3.txt).pg_sql): placeholders,COLLATE NOCASE/RTRIM(citext columns provide case-insensitive matching and unique usernames),datetime('now')forms, and the mutesettings upsert.IF NOT EXISTS.userdb_test.pyreruns the wholeUserDBTestsuite against a live server whenWEBTILES_TEST_POSTGRESQL_DSNis set, plus always-on unit tests for the rewrite rules.https://claude.ai/code/session_012epLj7mVTpcFaVNi8C8iy3