mirror of
https://github.com/ClusterCockpit/cc-backend
synced 2024-11-10 08:57:25 +01:00
142 lines
3.2 KiB
Go
142 lines
3.2 KiB
Go
// Copyright (C) 2022 NHR@FAU, University Erlangen-Nuremberg.
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// All rights reserved.
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// Use of this source code is governed by a MIT-style
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// license that can be found in the LICENSE file.
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package repository
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import (
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"database/sql"
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"embed"
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"fmt"
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"github.com/ClusterCockpit/cc-backend/pkg/log"
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"github.com/golang-migrate/migrate/v4"
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"github.com/golang-migrate/migrate/v4/database/mysql"
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"github.com/golang-migrate/migrate/v4/database/sqlite3"
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"github.com/golang-migrate/migrate/v4/source/iofs"
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)
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const Version uint = 7
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//go:embed migrations/*
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var migrationFiles embed.FS
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func checkDBVersion(backend string, db *sql.DB) error {
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var m *migrate.Migrate
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switch backend {
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case "sqlite3":
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driver, err := sqlite3.WithInstance(db, &sqlite3.Config{})
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if err != nil {
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return err
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}
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d, err := iofs.New(migrationFiles, "migrations/sqlite3")
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if err != nil {
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return err
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}
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m, err = migrate.NewWithInstance("iofs", d, "sqlite3", driver)
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if err != nil {
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return err
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}
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case "mysql":
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driver, err := mysql.WithInstance(db, &mysql.Config{})
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if err != nil {
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return err
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}
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d, err := iofs.New(migrationFiles, "migrations/mysql")
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if err != nil {
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return err
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}
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m, err = migrate.NewWithInstance("iofs", d, "mysql", driver)
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if err != nil {
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return err
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}
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default:
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log.Fatalf("unsupported database backend: %s", backend)
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}
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v, dirty, err := m.Version()
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if err != nil {
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if err == migrate.ErrNilVersion {
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log.Warn("Legacy database without version or missing database file!")
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} else {
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return err
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}
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}
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if v < Version {
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return fmt.Errorf("unsupported database version %d, need %d.\nPlease backup your database file and run cc-backend -migrate-db", v, Version)
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} else if v > Version {
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return fmt.Errorf("unsupported database version %d, need %d.\nPlease refer to documentation how to downgrade db with external migrate tool", v, Version)
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}
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if dirty {
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return fmt.Errorf("last migration to version %d has failed, please fix the db manually and force version with -force-db flag", Version)
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}
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return nil
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}
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func getMigrateInstance(backend string, db string) (m *migrate.Migrate, err error) {
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switch backend {
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case "sqlite3":
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d, err := iofs.New(migrationFiles, "migrations/sqlite3")
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if err != nil {
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log.Fatal(err)
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}
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m, err = migrate.NewWithSourceInstance("iofs", d, fmt.Sprintf("sqlite3://%s?_foreign_keys=on", db))
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if err != nil {
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return m, err
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}
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case "mysql":
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d, err := iofs.New(migrationFiles, "migrations/mysql")
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if err != nil {
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return m, err
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}
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m, err = migrate.NewWithSourceInstance("iofs", d, fmt.Sprintf("mysql://%s?multiStatements=true", db))
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if err != nil {
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return m, err
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}
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default:
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log.Fatalf("unsupported database backend: %s", backend)
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}
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return m, nil
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}
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func MigrateDB(backend string, db string) error {
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m, err := getMigrateInstance(backend, db)
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if err != nil {
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return err
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}
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if err := m.Migrate(Version); err != nil {
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if err == migrate.ErrNoChange {
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log.Info("DB already up to date!")
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} else {
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return err
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}
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}
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m.Close()
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return nil
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}
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func ForceDB(backend string, db string) error {
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m, err := getMigrateInstance(backend, db)
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if err != nil {
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return err
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}
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if err := m.Force(int(Version)); err != nil {
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return err
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}
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m.Close()
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return nil
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}
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