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sql.go
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sql.go
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package main
import (
"database/sql"
"fmt"
"github.com/golang-migrate/migrate/v4"
"github.com/golang-migrate/migrate/v4/database/postgres"
_ "github.com/golang-migrate/migrate/v4/source/file"
"github.com/hashicorp/go-hclog"
_ "github.com/jackc/pgx/v4/stdlib"
"github.com/jmoiron/sqlx"
)
// requires postgres 11
func InitPG(url string, logger hclog.Logger) (*sqlx.DB, error) {
db, err := sql.Open("pgx", url)
if err != nil {
return nil, fmt.Errorf("failed to open db: %w", err)
}
dbx := sqlx.NewDb(db, "pgx")
logger.Debug("migrating db")
if err = migrateDB(dbx); err != nil {
return nil, fmt.Errorf("failed migrating the db: %w", err)
}
return dbx, nil
}
func migrateDB(db *sqlx.DB) error {
driver, err := postgres.WithInstance(db.DB, &postgres.Config{})
if err != nil {
return err
}
m, err := migrate.NewWithDatabaseInstance("file://sql", "db", driver)
if err != nil {
return err
}
if err = m.Up(); err == migrate.ErrNoChange {
return nil
}
return err
}