[feat] utilize system's libsqlite3HEADtrunknext

Add support for using the system's libsqlite3 library by adding a driver
using "github.com/mattn/go-sqlite3".

1 files changed, 60 insertions, 0 deletions

diff --git a/internal/db/sqlite/errors_libsqlite3.go b/internal/db/sqlite/errors_libsqlite3.go
new file mode 100644
index 000000000..483d9ed14
--- /dev/null
+++ b/internal/db/sqlite/errors_libsqlite3.go
@@ -0,0 +1,60 @@
+// GoToSocial
+// Copyright (C) GoToSocial Authors admin@gotosocial.org
+// SPDX-License-Identifier: AGPL-3.0-or-later
+//
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU Affero General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU Affero General Public License for more details.
+//
+// You should have received a copy of the GNU Affero General Public License
+// along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+//go:build !moderncsqlite3 && !nowasm && libsqlite3
+
+package sqlite
+
+import (
+	"database/sql/driver"
+	"fmt"
+
+	sqlite3 "github.com/mattn/go-sqlite3"
+	"github.com/superseriousbusiness/gotosocial/internal/db"
+)
+
+// processSQLiteError processes an sqlite3.Error to
+// handle conversion to any of our common db types.
+func processSQLiteError(err error) error {
+	// Attempt to cast as sqlite error.
+	sqliteErr, ok := err.(sqlite3.Error)
+	if !ok {
+		return err
+	}
+
+	// Handle supplied error code:
+	switch sqliteErr.ExtendedCode {
+	case sqlite3.ErrConstraintUnique,
+		sqlite3.ErrConstraintPrimaryKey:
+		return db.ErrAlreadyExists
+
+	// Busy should be very rare, but on
+	// busy tell the database to close the
+	// connection, re-open and re-attempt
+	// which should give necessary timeout.
+	case sqlite3.ErrBusyRecovery,
+		sqlite3.ErrBusySnapshot:
+		return driver.ErrBadConn
+	}
+
+	// Wrap the returned error with the code and
+	// extended code for easier debugging later.
+	return fmt.Errorf("%w (code=%d extended=%d)", err,
+		sqliteErr.Code,
+		sqliteErr.ExtendedCode,
+	)
+}