57 lines
1,021 B
Go
57 lines
1,021 B
Go
// Copyright (C) 2019 Marius Schellenberger
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package db
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import (
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"git.giftfish.de/ston1th/docstore/pkg/log"
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"git.giftfish.de/ston1th/docstore/pkg/store"
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)
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const (
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versionKey = "version/version"
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currentVersion = 2
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)
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type migrator func(*DB) error
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var migrators = []migrator{
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func(db *DB) error {
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return nil
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},
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func(db *DB) error {
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// dummy placeholder
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return nil
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},
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func(db *DB) error {
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return db.addDefaultTags()
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},
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}
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func (db *DB) runMigrations() (err error) {
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var version int
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err = db.store.Get(versionKey, &version)
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if err == store.ErrKeyNotFound {
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err = db.store.Set(versionKey, currentVersion)
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if err != nil {
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return
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}
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err = db.store.Get(versionKey, &version)
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if err != nil {
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return
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}
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}
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log.Printf("db: database version %d", version)
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for version < currentVersion {
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v := version + 1
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log.Printf("db: running migration %d", v)
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err = migrators[v](db)
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if err != nil {
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return
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}
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err = db.store.Set(versionKey, v)
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if err != nil {
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return
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}
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}
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return
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}
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