Write reports to operator-selected outputs

internal/report/definition.go

@@ -42,7 +42,7 @@ type Definition struct {
 	GeneratedTextSchemaID    string
 	ComparisonStrategy       ComparisonStrategy
 	ArtifactGroup            string
-	BatchOutputName          string
+	OutputName               string
 	DistributorPathTemplates []string
 	CompatiblePriorIDs       []ID
 	Modules                  []module.ConfigItem
@@ -52,6 +52,23 @@ type Definition struct {
 	runIDDisambiguator       func(Resolved) string
 }
 
+func (r Resolved) OutputName() (string, error) {
+	if r.Definition.ID == Daily {
+		if r.ValidPeriod.Start.IsZero() {
+			return "", fmt.Errorf("daily report has no valid-period start for output naming")
+		}
+		location, err := timeutil.LoadLocation(r.Timezone)
+		if err != nil {
+			return "", fmt.Errorf("load report timezone for output naming: %w", err)
+		}
+		return "daily-" + r.ValidPeriod.Start.In(location).Format(timeutil.DateLayout) + ".md", nil
+	}
+	if r.Definition.OutputName == "" {
+		return "", fmt.Errorf("report %q has no output name", r.Definition.ID)
+	}
+	return r.Definition.OutputName, nil
+}
+
 func (d Definition) ResolvePeriod(req ResolveRequest) (timeutil.Period, error) {
 	if d.resolve == nil {
 		return timeutil.Period{}, fmt.Errorf("report %q has no valid-period resolver", d.ID)