Automatically upgrade databases on startup (#1529)

* Support auto-upgrading accounts DB

* Auto-upgrade device DB deltas

* Support up/downgrading from cmd/goose

* Linting

* Create tables then do migrations then prepare statements

To avoid failing due to some things not existing

* Linting

userapi/storage/devices/postgres/deltas/20201001204705_last_seen_ts_ip.go

@@ -0,0 +1,39 @@
+package deltas
+
+import (
+	"database/sql"
+	"fmt"
+
+	"github.com/matrix-org/dendrite/internal/sqlutil"
+	"github.com/pressly/goose"
+)
+
+func LoadFromGoose() {
+	goose.AddMigration(UpLastSeenTSIP, DownLastSeenTSIP)
+}
+
+func LoadLastSeenTSIP(m *sqlutil.Migrations) {
+	m.AddMigration(UpLastSeenTSIP, DownLastSeenTSIP)
+}
+
+func UpLastSeenTSIP(tx *sql.Tx) error {
+	_, err := tx.Exec(`
+ALTER TABLE device_devices ADD COLUMN IF NOT EXISTS last_seen_ts BIGINT NOT NULL DEFAULT EXTRACT(EPOCH FROM CURRENT_TIMESTAMP)*1000;
+ALTER TABLE device_devices ADD COLUMN IF NOT EXISTS ip TEXT;
+ALTER TABLE device_devices ADD COLUMN IF NOT EXISTS user_agent TEXT;`)
+	if err != nil {
+		return fmt.Errorf("failed to execute upgrade: %w", err)
+	}
+	return nil
+}
+
+func DownLastSeenTSIP(tx *sql.Tx) error {
+	_, err := tx.Exec(`
+	ALTER TABLE device_devices DROP COLUMN last_seen_ts;
+	ALTER TABLE device_devices DROP COLUMN ip;
+	ALTER TABLE device_devices DROP COLUMN user_agent;`)
+	if err != nil {
+		return fmt.Errorf("failed to execute downgrade: %w", err)
+	}
+	return nil
+}

userapi/storage/devices/postgres/deltas/20201001204705_last_seen_ts_ip.sql

@@ -1,13 +0,0 @@
--- +goose Up
--- +goose StatementBegin
-ALTER TABLE device_devices ADD COLUMN IF NOT EXISTS last_seen_ts BIGINT NOT NULL DEFAULT EXTRACT(EPOCH FROM CURRENT_TIMESTAMP)*1000;
-ALTER TABLE device_devices ADD COLUMN IF NOT EXISTS ip TEXT;
-ALTER TABLE device_devices ADD COLUMN IF NOT EXISTS user_agent TEXT;
--- +goose StatementEnd
-
--- +goose Down
--- +goose StatementBegin
-ALTER TABLE device_devices DROP COLUMN last_seen_ts;
-ALTER TABLE device_devices DROP COLUMN ip;
-ALTER TABLE device_devices DROP COLUMN user_agent;
--- +goose StatementEnd