feat: drag files between file panes (move or copy, SSH hosts too) and into a terminal of the same machine

internal/agent/sshfs_test.go

@@ -1,6 +1,9 @@
 package agent
 
 import (
+	"archive/tar"
+	"bytes"
+	"io"
 	"strings"
 	"testing"
 )
@@ -45,3 +48,61 @@ func TestParseLsLine(t *testing.T) {
 		t.Fatal("total parsed")
 	}
 }
+
+func TestRenameTarEntries(t *testing.T) {
+	var src bytes.Buffer
+	tw := tar.NewWriter(&src)
+	for _, n := range []string{"old/", "old/a.txt", "old/sub/b"} {
+		typ := byte(tar.TypeReg)
+		if strings.HasSuffix(n, "/") {
+			typ = tar.TypeDir
+		}
+		_ = tw.WriteHeader(&tar.Header{Name: n, Mode: 0o644, Typeflag: typ})
+	}
+	_ = tw.Close()
+	var out bytes.Buffer
+	if err := renameTar(&out, &src, "old", "new"); err != nil {
+		t.Fatal(err)
+	}
+	tr := tar.NewReader(&out)
+	var names []string
+	for {
+		h, err := tr.Next()
+		if err != nil {
+			break
+		}
+		names = append(names, h.Name)
+	}
+	if strings.Join(names, ",") != "new/,new/a.txt,new/sub/b" {
+		t.Fatalf("names: %v", names)
+	}
+}
+
+// A macOS host's tar packs "._name" companions with the file's attributes;
+// they are not the file and must not land under its name.
+func TestRenameTarDropsOtherEntries(t *testing.T) {
+	var src bytes.Buffer
+	tw := tar.NewWriter(&src)
+	for _, e := range []struct{ n, body string }{{"./._r.txt", "attrs"}, {"./r.txt", "data"}} {
+		_ = tw.WriteHeader(&tar.Header{Name: e.n, Mode: 0o644, Typeflag: tar.TypeReg, Size: int64(len(e.body))})
+		_, _ = tw.Write([]byte(e.body))
+	}
+	_ = tw.Close()
+	var out bytes.Buffer
+	if err := renameTar(&out, &src, "r.txt", "new.txt"); err != nil {
+		t.Fatal(err)
+	}
+	tr := tar.NewReader(&out)
+	var got []string
+	for {
+		h, err := tr.Next()
+		if err != nil {
+			break
+		}
+		b, _ := io.ReadAll(tr)
+		got = append(got, h.Name+"="+string(b))
+	}
+	if strings.Join(got, ",") != "new.txt=data" {
+		t.Fatalf("entries: %v", got)
+	}
+}