Refactor

Signed-off-by: Solomon Hykes <sh.github.6811@hykes.org>

dagger/types.go

@@ -0,0 +1,26 @@
+package dagger
+
+import (
+	"context"
+)
+
+// Implemented by Component, Script, Op
+type Executable interface {
+	Execute(context.Context, FS, Fillable) (FS, error)
+	Walk(func(*Op) error) error
+}
+
+// Something which can be filled in-place with a cue value
+type Fillable interface {
+	Fill(interface{}) error
+}
+
+func Discard() Fillable {
+	return discard{}
+}
+
+type discard struct{}
+
+func (d discard) Fill(x interface{}) error {
+	return nil
+}