[#5618] added support to conditionally reapply migrations

core/migrations_list.go

@@ -7,9 +7,10 @@ import (
 )
 
 type Migration struct {
-	Up   func(txApp App) error
-	Down func(txApp App) error
-	File string
+	Up               func(txApp App) error
+	Down             func(txApp App) error
+	File             string
+	ReapplyCondition func(txApp App, runner *MigrationsRunner, fileName string) (bool, error)
 }
 
 // MigrationsList defines a list with migration definitions
@@ -34,9 +35,27 @@ func (l *MigrationsList) Copy(list MigrationsList) {
 	}
 }
 
+// Add adds adds an existing migration definition to the list.
+//
+// If m.File is not provided, it will try to get the name from its .go file.
+//
+// The list will be sorted automatically based on the migrations file name.
+func (l *MigrationsList) Add(m *Migration) {
+	if m.File == "" {
+		_, path, _, _ := runtime.Caller(1)
+		m.File = filepath.Base(path)
+	}
+
+	l.list = append(l.list, m)
+
+	sort.SliceStable(l.list, func(i int, j int) bool {
+		return l.list[i].File < l.list[j].File
+	})
+}
+
 // Register adds new migration definition to the list.
 //
-// If `optFilename` is not provided, it will try to get the name from its .go file.
+// If optFilename is not provided, it will try to get the name from its .go file.
 //
 // The list will be sorted automatically based on the migrations file name.
 func (l *MigrationsList) Register(