UPDATE: native with new hdiff type

pkg/models/pkgVersion.go

@@ -0,0 +1,36 @@
+package models
+
+import (
+	"bufio"
+	"encoding/json"
+	"os"
+)
+
+type PkgVersion struct {
+	RemoteFile string `json:"remoteName"`
+	MD5        string `json:"md5"`
+}
+
+func LoadPkgVersion(path string) ([]*PkgVersion, error) {
+	file, err := os.Open(path)
+	if err != nil {
+		return nil, err
+	}
+	defer file.Close()
+
+	var results []*PkgVersion
+	scanner := bufio.NewScanner(file)
+	for scanner.Scan() {
+		line := scanner.Text()
+		var item PkgVersion
+		if err := json.Unmarshal([]byte(line), &item); err == nil {
+			results = append(results, &item)
+		}
+	}
+
+	if err := scanner.Err(); err != nil {
+		return nil, err
+	}
+
+	return results, nil
+}