Add DestDir variable

Client/Package/InstallPackage.go

@@ -6,6 +6,7 @@ import (
 	"os"
 
 	"PackageManager/Archive"
+	"PackageManager/Variables"
 )
 
 func InstallPackage(pkgs []string) error {
@@ -22,7 +23,9 @@ func InstallPackage(pkgs []string) error {
 	}
 
 	for _, pkg = range pkgs {
-		e = Archive.UntarGzip(pkg, "/")
+		fmt.Printf("Installing %s...", pkg)
+		e = Archive.UntarGzip(pkg, Variables.DestDir)
+		fmt.Printf("%s successfully installed", pkg)
 	}
 
 	return nil

Variables/Variables.go

@@ -1,5 +1,23 @@
 package Variables
 
+import (
+	"os"
+)
+
 const (
 	DatabaseName string = "package_manager.db"
 )
+
+var (
+	DestDir string = "/"
+)
+
+func init() {
+	var (
+		destDir string
+	)
+	destDir = os.Getenv("DESTDIR")
+	if destDir != "" {
+		DestDir = destDir
+	}
+}