Adding more info fields to file object

file.go

@@ -29,14 +29,18 @@ import (
 	"os"
 	"path"
 	"path/filepath"
+	"time"
 )
 
 type file struct {
 	path string
 	Meta map[string]interface{}
 
-	reader *bytes.Reader
+	reader  *bytes.Reader
-	asset  string
+	size    int64
+	modTime time.Time
+
+	asset string
 }
 
 func (f *file) export(dstDir string) error {
@@ -99,10 +103,26 @@ func (f *file) Path() string {
 	return f.path
 }
 
+func (f *file) Name() string {
+	return path.Base(f.path)
+}
+
 func (f *file) Dir() string {
 	return path.Dir(f.path)
 }
 
+func (f *file) Ext() string {
+	return path.Ext(f.path)
+}
+
+func (f *file) Size() int64 {
+	return f.size
+}
+
+func (f *file) ModTime() time.Time {
+	return f.modTime
+}
+
 func (f *file) Value(key string) (interface{}, bool) {
 	value, ok := f.Meta[key]
 	return value, ok

goldsmith.go

@@ -25,6 +25,8 @@ package goldsmith
 import (
 	"bytes"
 	"io"
+	"os"
+	"time"
 )
 
 type Goldsmith interface {
@@ -40,7 +42,11 @@ func Begin(srcDir string) Goldsmith {
 
 type File interface {
 	Path() string
+	Name() string
 	Dir() string
+	Ext() string
+	Size() int64
+	ModTime() time.Time
 
 	Value(key string) (interface{}, bool)
 	SetValue(key string, value interface{})
@@ -53,18 +59,29 @@ type File interface {
 
 func NewFileFromData(path string, data []byte) File {
 	return &file{
-		path:   path,
+		path:    path,
-		Meta:   make(map[string]interface{}),
+		Meta:    make(map[string]interface{}),
-		reader: bytes.NewReader(data),
+		reader:  bytes.NewReader(data),
+		size:    int64(len(data)),
+		modTime: time.Now(),
 	}
 }
 
-func NewFileFromAsset(path, asset string) File {
+func NewFileFromAsset(path, asset string) (File, error) {
-	return &file{
+	info, err := os.Stat(asset)
-		path:  path,
+	if err != nil {
-		Meta:  make(map[string]interface{}),
+		return nil, err
-		asset: asset,
 	}
+
+	f := &file{
+		path:    path,
+		Meta:    make(map[string]interface{}),
+		size:    info.Size(),
+		modTime: info.ModTime(),
+		asset:   asset,
+	}
+
+	return f, nil
 }
 
 type Context interface {

loader.go

@@ -36,7 +36,15 @@ func (*loader) Initialize(ctx Context) error {
 		}
 
 		relPath, _ := filepath.Rel(ctx.SrcDir(), info.path)
-		f := NewFileFromAsset(relPath, info.path)
+
+		f := &file{
+			path:    relPath,
+			Meta:    make(map[string]interface{}),
+			modTime: info.ModTime(),
+			size:    info.Size(),
+			asset:   info.path,
+		}
+
 		ctx.DispatchFile(f)
 	}