perf: several dragged items cross to another place as one tar stream; older agents get them one by one

internal/agent/sshfs_test.go

@@ -62,7 +62,7 @@ func TestRenameTarEntries(t *testing.T) {
 	}
 	_ = tw.Close()
 	var out bytes.Buffer
-	if err := renameTar(&out, &src, "old", "new"); err != nil {
+	if err := renameTar(&out, &src, map[string]string{"old": "new"}); err != nil {
 		t.Fatal(err)
 	}
 	tr := tar.NewReader(&out)
@@ -90,7 +90,7 @@ func TestRenameTarDropsOtherEntries(t *testing.T) {
 	}
 	_ = tw.Close()
 	var out bytes.Buffer
-	if err := renameTar(&out, &src, "r.txt", "new.txt"); err != nil {
+	if err := renameTar(&out, &src, map[string]string{"r.txt": "new.txt"}); err != nil {
 		t.Fatal(err)
 	}
 	tr := tar.NewReader(&out)
@@ -165,7 +165,7 @@ func TestRenameTarKeepsInsideName(t *testing.T) {
 	}
 	_ = tw.Close()
 	var out bytes.Buffer
-	if err := renameTar(&out, &src, "d", "d"); err != nil {
+	if err := renameTar(&out, &src, map[string]string{"d": "d"}); err != nil {
 		t.Fatal(err)
 	}
 	tr := tar.NewReader(&out)
@@ -184,11 +184,11 @@ func TestRenameTarKeepsInsideName(t *testing.T) {
 
 // Into an SSH host, "replace" replaces the thing whole, as on a machine.
 func TestUnpackCommandReplaces(t *testing.T) {
-	cmd := unpackCommand("/srv", "d", "replace", true)
+	cmd := unpackCommand("/srv", []string{"d"}, "replace")
 	if !strings.HasPrefix(cmd, "rm -rf -- '/srv/d' && ") || strings.Contains(cmd, "--overwrite") {
 		t.Fatalf("replace: %s", cmd)
 	}
-	if cmd := unpackCommand("/srv", "d", "error", false); cmd != "mkdir -p -- '/srv' && cd -- '/srv' && tar -xf -" {
+	if cmd := unpackCommand("/srv", []string{"d"}, "error"); cmd != "mkdir -p -- '/srv' && cd -- '/srv' && tar -xf -" {
 		t.Fatalf("error: %s", cmd)
 	}
 }