Add option for archive and restore VMs

lib/vm/archive.rb

@@ -0,0 +1,37 @@
+require "fileutils"
+
+module Archive
+    def self.cmd(*cmd)
+        puts "cmd: #{cmd.join(" ")}"
+        # return 
+        stdout, stderr, status = Open3.capture3(*cmd)
+        unless status.success?
+            warn "Command failed: #{cmd.join(' ')}"
+            warn stderr
+            exit status.exitstatus || 1
+        end
+        stdout
+    end
+
+    # it preserved sparsiveness 
+    #     gtar -S --sparse-version=2 -I 'zstd -T0 -19' -cpf test.tar.zst /Volumes/Projs/VM/VM-data/image/debian-arm64/debian/
+    #     tar --zstd -xpf test.tar.zst -C ./r
+
+    def self.create(path, **options)
+        out = options[:out] || File.join(Dir.pwd, "archive.tar.zst")
+        
+        FileUtils.mkdir_p(File.dirname(out))
+        cmd "gtar", "-S", "--sparse-version=2", "-I",
+            "zstd -T0 -19", "-cpf", out, "-C" , path, "."
+    end
+
+    def self.restore(file, path, **options)
+        puts file
+        puts path
+        puts options
+
+        FileUtils.mkdir_p(path)
+        cmd "gtar", "-S", "--sparse-version=2", "-I", "zstd", "-xpf",
+            file, "-C", path
+    end
+end