75 lines
2.1 KiB
Go
75 lines
2.1 KiB
Go
package db
|
|
|
|
import (
|
|
"log"
|
|
"os"
|
|
"time"
|
|
|
|
"github.com/pkg/errors"
|
|
"gorm.io/driver/postgres"
|
|
"gorm.io/driver/sqlite"
|
|
"gorm.io/gorm"
|
|
"gorm.io/gorm/logger"
|
|
)
|
|
|
|
const (
|
|
// EnvDatabaseDriver is the key for the 'database driver' environment variable.
|
|
EnvDatabaseDriver = "RUSHLINK_DATABASE_DRIVER"
|
|
// EnvDatabasePath is the key for the 'database path' environment variable.
|
|
EnvDatabasePath = "RUSHLINK_DATABASE_PATH"
|
|
// EnvPostgresURL is the key for the 'postgresql URL' environment variable.
|
|
EnvPostgresURL = "RUSHLINK_POSTGRES_URL"
|
|
// EnvFileStorePath is the key for the environment variable locating the file store.
|
|
EnvFileStorePath = "RUSHLINK_FILE_STORE_PATH"
|
|
)
|
|
|
|
// Database is the main rushlink database type.
|
|
//
|
|
// Open a database using OpenDBFromEnvironment(). Closing is not necessary.
|
|
// Only one instance of DB should exist in a program at any moment.
|
|
type Database = gorm.DB
|
|
|
|
var (
|
|
gormLogger logger.Interface = logger.New(log.New(os.Stdout, "\r\n", log.LstdFlags), logger.Config{
|
|
SlowThreshold: 50 * time.Millisecond,
|
|
LogLevel: logger.Warn,
|
|
Colorful: true,
|
|
})
|
|
gormConfig = gorm.Config{Logger: gormLogger, PrepareStmt: true}
|
|
)
|
|
|
|
// OpenDBFromEnvironment tries to open an SQL database, described by
|
|
func OpenDBFromEnvironment() (*Database, error) {
|
|
const envNotSetMsg = "%v environment variable is not set"
|
|
|
|
driver, prs := os.LookupEnv(EnvDatabaseDriver)
|
|
if !prs {
|
|
return nil, errors.Errorf(envNotSetMsg, EnvDatabaseDriver)
|
|
}
|
|
switch driver {
|
|
case "sqlite":
|
|
path, prs := os.LookupEnv(EnvDatabasePath)
|
|
if !prs {
|
|
return nil, errors.Errorf(envNotSetMsg, EnvDatabasePath)
|
|
}
|
|
db, err := gorm.Open(sqlite.Open(path), &gormConfig)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
return db, nil
|
|
case "postgres":
|
|
dsn, prs := os.LookupEnv(EnvPostgresURL)
|
|
if !prs {
|
|
return nil, errors.Errorf(envNotSetMsg, EnvPostgresURL)
|
|
}
|
|
db, err := gorm.Open(postgres.Open(dsn), &gormConfig)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
return db, nil
|
|
default:
|
|
return nil, errors.Errorf("RUSHLINK_DATABASE_DRIVER should be either 'sqlite' or 'postgres' (not '%v'), "+
|
|
"for more info see <https://stackoverflow.com/q/3582552/5207081>", driver)
|
|
}
|
|
}
|