New file creation

file.go

@@ -30,6 +30,7 @@ import (
 type file struct {
 	path string
 	meta map[string]interface{}
+	buff *bytes.Buffer
 }
 
 func (f *file) Path() string {
@@ -50,6 +51,10 @@ func (f *file) SetProperty(key string, value interface{}) {
 }
 
 func (f *file) Data() (*bytes.Buffer, error) {
+	if f.buff != nil {
+		return f.buff, nil
+	}
+
 	file, err := os.Open(f.path)
 	if err != nil {
 		return nil, err
@@ -61,5 +66,6 @@ func (f *file) Data() (*bytes.Buffer, error) {
 		return nil, err
 	}
 
-	return &buff, nil
+	f.buff = &buff
+	return f.buff, nil
 }

goldsmith.go

@@ -64,7 +64,7 @@ func (gs *goldsmith) scan() error {
 			return err
 		}
 
-		gs.files <- &file{path, make(map[string]interface{})}
+		gs.files <- gs.NewFile(path)
 	}
 
 	return nil
@@ -82,12 +82,16 @@ func (gs *goldsmith) stage() stage {
 	return s
 }
 
-func (gs *goldsmith) AbsSrcPath(path string) string {
-	return filepath.Join(gs.srcPath, path)
+func (gs *goldsmith) SrcPath(path string) string {
+	return gs.srcPath
 }
 
-func (gs *goldsmith) AbsDstPath(path string) string {
-	return filepath.Join(gs.dstPath, path)
+func (gs *goldsmith) DstPath(path string) string {
+	return gs.dstPath
+}
+
+func (gs *goldsmith) NewFile(path string) File {
+	return &file{path, make(map[string]interface{}), nil}
 }
 
 func (gs *goldsmith) Apply(p Processor) Applier {

types.go

@@ -25,8 +25,10 @@ package goldsmith
 import "bytes"
 
 type Context interface {
-	AbsSrcPath(path string) string
-	AbsDstPath(path string) string
+	SrcPath(path string) string
+	DstPath(path string) string
+
+	NewFile(path string) File
 }
 
 type File interface {