fix gsheet reader skip empty records

io/transform/gsheet2csv/gsheet2csv.go

@@ -213,6 +213,17 @@ func (r *Reader) Read() ([]string, error) {
 			return nil, err
 		}
 
+		allEmpty := true
+		for _, field := range record {
+			if field != "" {
+				allEmpty = false
+				break
+			}
+		}
+		if allEmpty {
+			continue
+		}
+
 		if r.Comment > 0 {
 			if rv, _ := utf8.DecodeRuneInString(record[0]); rv == r.Comment {
 				last := len(record) - 1

io/transform/gsheet2csv/gsheet2csv_test.go

@@ -131,6 +131,23 @@ func TestNewReaderFromURL(t *testing.T) {
 	}
 }
 
+func TestReadSkipsEmptyRecords(t *testing.T) {
+	reader := NewReader(strings.NewReader("a,b\n,,\n\"\",\"\"\nvalue,\n"))
+	rows, err := reader.ReadAll()
+	if err != nil {
+		t.Fatal(err)
+	}
+	want := [][]string{{"a", "b"}, {"value", ""}}
+	if len(rows) != len(want) {
+		t.Fatalf("rows = %v, want %v", rows, want)
+	}
+	for i := range want {
+		if !slices.Equal(rows[i], want[i]) {
+			t.Fatalf("rows = %v, want %v", rows, want)
+		}
+	}
+}
+
 // TestRead tests the Read method for comment handling.
 func TestRead(t *testing.T) {
 	tests := []struct {