add:partial functionality

internal/services/commands.go

@@ -0,0 +1,53 @@
+package services
+
+import (
+	"os/exec"
+)
+
+const defaultPort = "22"
+const defaultStoragePath = "~/.filepass_storage"
+
+func serverPort(s Server) string {
+	if s.Port == "" {
+		return defaultPort
+	}
+	return s.Port
+}
+
+// SSHCmd returns an exec.Cmd for running a single command on the server.
+func SSHCmd(s Server, remoteCmd string) *exec.Cmd {
+	return exec.Command(
+		"ssh",
+		"-i", s.PrivateKey,
+		"-p", serverPort(s),
+		"-o", "StrictHostKeyChecking=no",
+		"-o", "BatchMode=yes",
+		s.User+"@"+s.Host,
+		remoteCmd,
+	)
+}
+
+// RsyncCmd returns an exec.Cmd for an rsync transfer.
+// src and dst follow standard rsync syntax (local path or user@host:path).
+func RsyncCmd(s Server, src, dst string) *exec.Cmd {
+	sshFlag := "ssh -i " + s.PrivateKey + " -p " + serverPort(s) +
+		" -o StrictHostKeyChecking=no -o BatchMode=yes"
+	return exec.Command(
+		"rsync",
+		"-avz",
+		"--partial",
+		"-e", sshFlag,
+		src,
+		dst,
+	)
+}
+
+// RemotePath returns the full remote path for a filename inside storage.
+func RemotePath(s Server, filename string) string {
+	return s.User + "@" + s.Host + ":" + defaultStoragePath + "/" + filename
+}
+
+// RemoteStorageRoot returns the remote storage root for rsync operations.
+func RemoteStorageRoot(s Server) string {
+	return s.User + "@" + s.Host + ":" + defaultStoragePath + "/"
+}