fix source/file driver

source/file/file.go

@@ -6,12 +6,34 @@ import (
 	"path/filepath"
 
 	"github.com/golang-migrate/migrate/v4/source"
+	"github.com/golang-migrate/migrate/v4/source/iofs"
 )
 
 func init() {
 	source.Register("file", &File{})
 }
 
+type File struct {
+	iofs.PartialDriver
+	url  string
+	path string
+}
+
+func (f *File) Open(url string) (source.Driver, error) {
+	p, err := parseURL(url)
+	if err != nil {
+		return nil, err
+	}
+	nf := &File{
+		url:  url,
+		path: p,
+	}
+	if err := nf.Init(os.DirFS(p), "."); err != nil {
+		return nil, err
+	}
+	return nf, nil
+}
+
 func parseURL(url string) (string, error) {
 	u, err := nurl.Parse(url)
 	if err != nil {

source/file/file_go115.go

@@ -1,32 +0,0 @@
-// +build !go1.16
-
-package file
-
-import (
-	"net/http"
-
-	"github.com/golang-migrate/migrate/v4/source"
-	"github.com/golang-migrate/migrate/v4/source/httpfs"
-)
-
-type File struct {
-	httpfs.PartialDriver
-	url  string
-	path string
-}
-
-func (f *File) Open(url string) (source.Driver, error) {
-	p, err := parseURL(url)
-	if err != nil {
-		return nil, err
-	}
-
-	nf := &File{
-		url:  url,
-		path: p,
-	}
-	if err := nf.Init(http.Dir(p), ""); err != nil {
-		return nil, err
-	}
-	return nf, nil
-}

source/file/file_go116.go

@@ -1,32 +0,0 @@
-//go:build go1.16
-// +build go1.16
-
-package file
-
-import (
-	"os"
-
-	"github.com/golang-migrate/migrate/v4/source"
-	"github.com/golang-migrate/migrate/v4/source/iofs"
-)
-
-type File struct {
-	iofs.PartialDriver
-	url  string
-	path string
-}
-
-func (f *File) Open(url string) (source.Driver, error) {
-	p, err := parseURL(url)
-	if err != nil {
-		return nil, err
-	}
-	nf := &File{
-		url:  url,
-		path: p,
-	}
-	if err := nf.Init(os.DirFS(p), "."); err != nil {
-		return nil, err
-	}
-	return nf, nil
-}