[chore] add a 'nosqlite' and 'nopostgres' build tags to support compiling without certain database support (#4523)

following on from previous PRs, this is all in the name of reducing binary size! compiling with `nosqlite` nets a saving of ~2M, and compiling with `nopostgres` nets a saving of ~4M

Reviewed-on: https://codeberg.org/superseriousbusiness/gotosocial/pulls/4523
Co-authored-by: kim <grufwub@gmail.com>
Co-committed-by: kim <grufwub@gmail.com>

1 files changed, 32 insertions, 0 deletions

diff --git a/internal/db/bundb/driver_nopostgres.go b/internal/db/bundb/driver_nopostgres.go
new file mode 100644
index 000000000..8b20d9fa0
--- /dev/null
+++ b/internal/db/bundb/driver_nopostgres.go
@@ -0,0 +1,32 @@
+// 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 nopostgres
+
+package bundb
+
+import (
+	"context"
+	"database/sql"
+	"errors"
+
+	"github.com/uptrace/bun/schema"
+)
+
+func pgConn(ctx context.Context) (*sql.DB, func() schema.Dialect, error) {
+	return nil, nil, errors.New("gotosocial was compiled without postgres support")
+}