autobrr/internal/database/postgres.go
ze0s 604c7896bd
chore: add LICENSE GPLv2-or-later (#897)
* chore: add LICENSE

* chore: add LICENSE to README
2023-05-01 16:21:59 +02:00

89 lines
2.5 KiB
Go

// Copyright (c) 2021 - 2023, Ludvig Lundgren and the autobrr contributors.
// SPDX-License-Identifier: GPL-2.0-or-later
package database
import (
"database/sql"
"github.com/autobrr/autobrr/pkg/errors"
_ "github.com/lib/pq"
)
func (db *DB) openPostgres() error {
var err error
// open database connection
if db.handler, err = sql.Open("postgres", db.DSN); err != nil {
db.log.Fatal().Err(err).Msg("could not open postgres connection")
return errors.Wrap(err, "could not open postgres connection")
}
err = db.handler.Ping()
if err != nil {
db.log.Fatal().Err(err).Msg("could not ping postgres database")
return errors.Wrap(err, "could not ping postgres database")
}
// migrate db
if err = db.migratePostgres(); err != nil {
db.log.Fatal().Err(err).Msg("could not migrate postgres database")
return errors.Wrap(err, "could not migrate postgres database")
}
return nil
}
func (db *DB) migratePostgres() error {
tx, err := db.handler.Begin()
if err != nil {
return errors.Wrap(err, "error starting transaction")
}
defer tx.Rollback()
initialSchema := `CREATE TABLE IF NOT EXISTS schema_migrations (
id INTEGER PRIMARY KEY,
version INTEGER NOT NULL
);`
if _, err := tx.Exec(initialSchema); err != nil {
return errors.New("failed to create schema_migrations table")
}
var version int
err = tx.QueryRow(`SELECT version FROM schema_migrations`).Scan(&version)
if err != nil && !errors.Is(err, sql.ErrNoRows) {
return errors.Wrap(err, "failed to query schema version")
}
if version == len(postgresMigrations) {
return nil
} else if version > len(postgresMigrations) {
return errors.New("autobrr (version %d) older than schema (version: %d)", len(postgresMigrations), version)
}
db.log.Info().Msgf("Beginning database schema upgrade from version %v to version: %v", version, len(postgresMigrations))
if version == 0 {
if _, err := tx.Exec(postgresSchema); err != nil {
return errors.Wrap(err, "failed to initialize schema")
}
} else {
for i := version; i < len(postgresMigrations); i++ {
db.log.Info().Msgf("Upgrading Database schema to version: %v", i)
if _, err := tx.Exec(postgresMigrations[i]); err != nil {
return errors.Wrap(err, "failed to execute migration #%v", i)
}
}
}
_, err = tx.Exec(`INSERT INTO schema_migrations (id, version) VALUES (1, $1) ON CONFLICT (id) DO UPDATE SET version = $1`, len(postgresMigrations))
if err != nil {
return errors.Wrap(err, "failed to bump schema version")
}
db.log.Info().Msgf("Database schema upgraded to version: %v", len(postgresMigrations))
return tx.Commit()
}