add file export (#1959)

os/gres/gres_file.go

@@ -54,6 +54,11 @@ func (f *File) FileInfo() os.FileInfo {
 	return f.file.FileInfo()
 }
 
+// Export exports and saves all its sub files to specified system path `dst` recursively.
+func (f *File) Export(dst string, option ...ExportOption) error {
+	return f.resource.Export(f.Name(), dst, option...)
+}
+
 // MarshalJSON implements the interface MarshalJSON for json.Marshal.
 func (f File) MarshalJSON() ([]byte, error) {
 	info := f.FileInfo()

os/gres/gres_resource.go

@@ -237,8 +237,15 @@ func (r *Resource) Export(src, dst string, option ...ExportOption) error {
 		name         string
 		path         string
 		exportOption ExportOption
-		files        = r.doScanDir(src, "*", true, false)
+		files        []*File
 	)
+
+	if r.Get(src).FileInfo().IsDir() {
+		files = r.doScanDir(src, "*", true, false)
+	} else {
+		files = append(files, r.Get(src))
+	}
+
 	if len(option) > 0 {
 		exportOption = option[0]
 	}

os/gres/gres_z_unit_test.go

@@ -109,6 +109,17 @@ func Test_PackWithPrefix2(t *testing.T) {
 	})
 }
 
+func Test_Unpack(t *testing.T) {
+	gtest.C(t, func(t *gtest.T) {
+		var (
+			srcPath    = gtest.DataPath("testdata.txt")
+			files, err = gres.Unpack(srcPath)
+		)
+		t.AssertNil(err)
+		t.Assert(len(files), 63)
+	})
+}
+
 func Test_Basic(t *testing.T) {
 	gres.Dump()
 	gtest.C(t, func(t *gtest.T) {
@@ -269,4 +280,77 @@ func Test_Export(t *testing.T) {
 		nameInSys := `index.html`
 		t.Assert(gfile.GetContents(gfile.Join(dst, nameInSys)), gres.GetContent(nameInRes))
 	})
+	gtest.C(t, func(t *gtest.T) {
+		var (
+			src = `template-res/layout1/container.html`
+			dst = gfile.Temp(gtime.TimestampNanoStr())
+			err = gres.Export(src, dst, gres.ExportOption{
+				RemovePrefix: `template-res`,
+			})
+		)
+		defer gfile.Remove(dst)
+		t.AssertNil(err)
+		files, err := gfile.ScanDir(dst, "*", true)
+		t.AssertNil(err)
+		t.Assert(len(files), 2)
+	})
+}
+
+func Test_IsEmpty(t *testing.T) {
+	gtest.C(t, func(t *gtest.T) {
+		t.Assert(gres.IsEmpty(), false)
+	})
+}
+
+func TestFile_Name(t *testing.T) {
+	gtest.C(t, func(t *gtest.T) {
+		var (
+			src = `template-res`
+		)
+		t.Assert(gres.Get(src).Name(), src)
+	})
+}
+
+func TestFile_Export(t *testing.T) {
+	gres.Dump()
+	gtest.C(t, func(t *gtest.T) {
+		var (
+			src = `template-res`
+			dst = gfile.Temp(gtime.TimestampNanoStr())
+			err = gres.Get(src).Export(dst)
+		)
+		defer gfile.Remove(dst)
+		t.AssertNil(err)
+		files, err := gfile.ScanDir(dst, "*", true)
+		t.AssertNil(err)
+		t.Assert(len(files), 14)
+	})
+	gtest.C(t, func(t *gtest.T) {
+		var (
+			src = `template-res`
+			dst = gfile.Temp(gtime.TimestampNanoStr())
+			err = gres.Get(src).Export(dst, gres.ExportOption{
+				RemovePrefix: `template-res`,
+			})
+		)
+		defer gfile.Remove(dst)
+		t.AssertNil(err)
+		files, err := gfile.ScanDir(dst, "*", true)
+		t.AssertNil(err)
+		t.Assert(len(files), 13)
+	})
+	gtest.C(t, func(t *gtest.T) {
+		var (
+			src = `template-res/layout1/container.html`
+			dst = gfile.Temp(gtime.TimestampNanoStr())
+			err = gres.Get(src).Export(dst, gres.ExportOption{
+				RemovePrefix: `template-res`,
+			})
+		)
+		defer gfile.Remove(dst)
+		t.AssertNil(err)
+		files, err := gfile.ScanDir(dst, "*", true)
+		t.AssertNil(err)
+		t.Assert(len(files), 2)
+	})
 }