added a workaround to use a embed.fs filesystem.

middleware/db/db.go

@@ -2,6 +2,7 @@ package db
 
 import (
 	"context"
+	"io/fs"
 	"sync"
 
 	"github.com/gin-gonic/gin"
@@ -102,14 +103,15 @@ func logmigrations(version int32, name string, dir string, sql string) {
 }
 
 // SetupMigrator sets up the migrator to migrate the database.
-func SetupMigrator(prefix string, connection *pgx.Conn, migrations migrate.MigratorFS) (mig *migrate.Migrator, err error) {
+func SetupMigrator(prefix string, connection *pgx.Conn, migrations fs.FS) (mig *migrate.Migrator, err error) {
+	migfs := &iofsMigratorFS{fsys: migrations}
 	mig, err = migrate.NewMigratorEx(
 		context.TODO(),
 		connection,
 		"version",
 		&migrate.MigratorOptions{
 			DisableTx:  false,
-			MigratorFS: migrations,
+			MigratorFS: migfs,
 		},
 	)
 	if err != nil {

middleware/db/workarounds.go

@@ -0,0 +1,32 @@
+package db
+
+import (
+	"io/fs"
+	"os"
+)
+
+type iofsMigratorFS struct{ fsys fs.FS }
+
+func (m iofsMigratorFS) ReadDir(dirname string) ([]fs.FileInfo, error) {
+	de, err := fs.ReadDir(m.fsys, dirname)
+	if err != nil {
+		return nil, err
+	}
+	var res []os.FileInfo
+	for _, v := range de {
+		fi, err := v.Info()
+		if err != nil {
+			return nil, err
+		}
+		res = append(res, fi)
+	}
+	return res, nil
+}
+
+func (m iofsMigratorFS) ReadFile(filename string) ([]byte, error) {
+	return fs.ReadFile(m.fsys, filename)
+}
+
+func (m iofsMigratorFS) Glob(pattern string) (matches []string, err error) {
+	return fs.Glob(m.fsys, pattern)
+}