Move the MySQL normalize DNS function dependency to cmd/

cmd/goose/driver_mysql.go

@@ -1,8 +1,33 @@
-// +build !no_mysql
+// +build mysql
 
 package main
 
 import (
+	"log"
+
+	"github.com/go-sql-driver/mysql"
+
 	_ "github.com/go-sql-driver/mysql"
 	_ "github.com/ziutek/mymysql/godrv"
 )
+
+// normalizeMySQLDSN parses the dsn used with the mysql driver to always have
+// the parameter `parseTime` set to true. This allows internal goose logic
+// to assume that DATETIME/DATE/TIMESTAMP can be scanned into the time.Time
+// type.
+func normalizeDBString(str string) string {
+	var err error
+	str, err = normalizeMySQLDSN(dns string)
+	if err != nil {
+		log.Fatalf("failed to normalize MySQL connection string: %v", err)
+	}
+}
+
+func normalizeMySQLDSN(dns string) (string, error) {
+    config, err := mysql.ParseDSN(dsn)
+    if err != nil {
+        return "", err
+    }
+    config.ParseTime = true
+    return config.FormatDSN(), nil
+}

cmd/goose/driver_no_mysql.go

@@ -0,0 +1,12 @@
+// +build !mysql
+
+package main
+
+import (
+	_ "github.com/go-sql-driver/mysql"
+	_ "github.com/ziutek/mymysql/godrv"
+)
+
+func normalizeDBString(str string) string {
+	return str
+}

cmd/goose/main.go

@@ -55,13 +55,7 @@ func main() {
 
 	driver, dbstring, command := args[0], args[1], args[2]
 
-	switch dbstring {
-	case "":
-		log.Fatalf("-dbstring=%q not supported\n", dbstring)
-	default:
-	}
-
-	db, err := goose.OpenDBWithDriver(driver, dbstring)
+	db, err := goose.OpenDBWithDriver(driver, normalizeDBString(dbstring))
 	if err != nil {
 		log.Fatalf("-dbstring=%q: %v\n", dbstring, err)
 	}

db.go

@@ -3,8 +3,6 @@ package goose
 import (
 	"database/sql"
 	"fmt"
-
-	"github.com/go-sql-driver/mysql"
 )
 
 // OpenDBWithDriver creates a connection a database, and modifies goose
@@ -22,28 +20,9 @@ func OpenDBWithDriver(driver string, dbstring string) (*sql.DB, error) {
 	}
 
 	switch driver {
-	case "postgres", "sqlite3":
+	case "postgres", "sqlite3", "mysql":
 		return sql.Open(driver, dbstring)
-	case "mysql":
-		dsn, err := normalizeMySQLDSN(dbstring)
-		if err != nil {
-			return nil, err
-		}
-		return sql.Open(driver, dsn)
 	default:
 		return nil, fmt.Errorf("unsupported driver %s", driver)
 	}
 }
-
-// normalizeMySQLDSN parses the dsn used with the mysql driver to always have
-// the parameter `parseTime` set to true. This allows internal goose logic
-// to assume that DATETIME/DATE/TIMESTAMP can be scanned into the time.Time
-// type.
-func normalizeMySQLDSN(dsn string) (string, error) {
-	config, err := mysql.ParseDSN(dsn)
-	if err != nil {
-		return "", err
-	}
-	config.ParseTime = true
-	return config.FormatDSN(), nil
-}