root does not marshal TSs on todos, always on schedules, dones. Test.

pttodo/root.go

@@ -36,3 +36,17 @@ func (root *Root) MergeIn(root2 Root) {
 		}
 	}
 }
+
+func (root Root) MarshalYAML() (interface{}, error) {
+	for i := range root.Todo {
+		root.Todo[i].writeTS = false
+	}
+	for i := range root.Scheduled {
+		root.Scheduled[i].writeTS = true
+	}
+	for i := range root.Done {
+		root.Done[i].writeTS = true
+	}
+	type Alt Root
+	return (Alt)(root), nil
+}

pttodo/root_test.go

@@ -4,6 +4,7 @@ import (
 	"encoding/json"
 	"fmt"
 	"strconv"
+	"strings"
 	"testing"
 	"time"
 
@@ -145,3 +146,28 @@ todo:
 		t.Fatalf("want \n\t%+v, got \n\t%+v", rootWant, root0)
 	}
 }
+
+func TestRootMarshalYAMLWriteTS(t *testing.T) {
+	root := Root{
+		Todo:      []Todo{Todo{Todo: "todo", TS: 1, writeTS: true}},
+		Scheduled: []Todo{Todo{Todo: "sched", TS: 2, writeTS: false, Schedule: "2099-01-01"}},
+		Done:      []Todo{Todo{Todo: "done", TS: 3, writeTS: false}},
+	}
+	got, err := yaml.Marshal(root)
+	if err != nil {
+		t.Fatal(err)
+	}
+	if strings.TrimSpace(string(got)) != strings.TrimSpace(`
+todo:
+- todo
+scheduled:
+- todo: sched
+  schedule: "2099-01-01"
+  ts: Wed Dec 31 19:00:02 EST 1969
+done:
+- todo: done
+  ts: Wed Dec 31 19:00:03 EST 1969
+   `) {
+		t.Fatal(string(got))
+	}
+}