[bonelifer]

Lets the feature checks run on every database phpBB supports, except Oracle, which phpBB is dropping. Until now they only ran on phpbb-test-board's own SQLite board.

What changes

• feature_checks.py --seed-board BOARD_ROOT --port PORT: runs the checks against an installed seed-forum board, on SQLite, MySQL, MariaDB, PostgreSQL or MSSQL. A new SeedBoard class drives it. SQL goes through seed-forum's bin/board-sql.php (phpBB's own database layer) and PHP through bin/board-php.py, so the checks don't change per database. After its check, each extension is disabled, purged and enabled again through phpBB's CLI, which runs its migrations backwards and forwards on that database. This needs seed-forum's board.database support (phpbbmodders/seed-forum, branch board-database-engines).
• db-matrix.sh: runs that for every phpBB branch and database. It builds a seed-forum board per combination, runs the checks, unmounts the board's extensions, stops its database container, and prints a summary.
• SeedBoard.serve() refuses to start when something already answers on the board's port. A leftover server once made a run check the wrong board.
• Contact Admin check:
  • builds its route with b.route(), so it also runs on phpBB 4.0 (index.php instead of app.php);
  • now sends a guest message by private message and checks it was stored, so each database gets a real write through the contact form.
• The README documents both. Tests cover the new options' help text and exit statuses, and CI's ShellCheck step now includes db-matrix.sh.

Testing

• tests/test-phpbb-test-board.sh: all tests pass, including the eight new ones.
• CI's ShellCheck command passes locally.
• Claude ran db-matrix.sh on Contact Admin across phpBB 3.3.19 and 4.0.0-a3-dev with SQLite, MySQL 8.4, MariaDB LTS, PostgreSQL 16 and SQL Server 2022: all ten boards passed, 15 of 15 checks each.
• The existing SQLite mode was not changed.

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Investigated and written by Claude on behalf of William Jacoby (bonelifer).