Add destination link metadata

internal/app/run_test.go

@@ -215,6 +215,9 @@ func TestRunPublishesNewLocalBundle(t *testing.T) {
 	if got, want := len(destinationState.Outputs), 2; got != want {
 		t.Fatalf("state output count = %d, want %d", got, want)
 	}
+	if destinationState.Links != nil || destinationState.Outputs[0].URL != "" {
+		t.Fatalf("state links = %#v output URL=%q, want absent", destinationState.Links, destinationState.Outputs[0].URL)
+	}
 }
 
 func TestRunExplicitPreserveRelativePathMappingMatchesDefault(t *testing.T) {
@@ -232,6 +235,54 @@ func TestRunExplicitPreserveRelativePathMappingMatchesDefault(t *testing.T) {
 	}
 }
 
+func TestRunRecordsLinksForNestedBundlePath(t *testing.T) {
+	sourceRoot := t.TempDir()
+	destinationRoot := t.TempDir()
+	writeSourceBundle(t, sourceRoot, "daily/brentwood", testBundleOptions{})
+
+	err := Run(context.Background(), RunOptions{
+		ConfigPath: writeLocalConfigWithLinks(t, sourceRoot, destinationRoot, config.PathMappingPreserveRelative, "https://reports.example.com/archive", config.LinkPrimaryAuto, true, false, ""),
+	})
+	if err != nil {
+		t.Fatalf("Run() error = %v", err)
+	}
+	destinationState := readStateFile(t, filepath.Join(destinationRoot, "daily", "brentwood", storage.StateFileName))
+	if destinationState.Links == nil || destinationState.Links.PrimaryURL != "https://reports.example.com/archive/daily/brentwood/report.md" {
+		t.Fatalf("state links = %#v, want source primary URL", destinationState.Links)
+	}
+	outputs := outputsByPath(destinationState.Outputs)
+	if outputs["report.md"].URL != "https://reports.example.com/archive/daily/brentwood/report.md" {
+		t.Fatalf("report URL = %q", outputs["report.md"].URL)
+	}
+	if outputs["summary.txt"].URL != "https://reports.example.com/archive/daily/brentwood/summary.txt" {
+		t.Fatalf("summary URL = %q", outputs["summary.txt"].URL)
+	}
+}
+
+func TestRunRecordsLinksForFixedIndexDestination(t *testing.T) {
+	sourceRoot := t.TempDir()
+	destinationRoot := t.TempDir()
+	writeSourceBundle(t, sourceRoot, "older", testBundleOptions{ID: "reports.older", Created: testutil.DefaultCreated})
+	writeSourceBundle(t, sourceRoot, "newer", testBundleOptions{ID: "reports.newer", Created: testutil.DefaultCreated.Add(time.Hour)})
+
+	err := Run(context.Background(), RunOptions{
+		ConfigPath: writeLocalConfigWithLinks(t, sourceRoot, destinationRoot, config.PathMappingFixed, "https://reports.example.com/latest", config.LinkPrimaryAuto, false, true, config.TransformModeIndex),
+	})
+	if err != nil {
+		t.Fatalf("Run() error = %v", err)
+	}
+	destinationState := readStateFile(t, filepath.Join(destinationRoot, storage.StateFileName))
+	if destinationState.Links == nil || destinationState.Links.PrimaryURL != "https://reports.example.com/latest/" {
+		t.Fatalf("state links = %#v, want fixed index primary URL", destinationState.Links)
+	}
+	if got, want := len(destinationState.Outputs), 1; got != want {
+		t.Fatalf("state output count = %d, want %d", got, want)
+	}
+	if destinationState.Outputs[0].Path != "index.html" || destinationState.Outputs[0].URL != "https://reports.example.com/latest/" {
+		t.Fatalf("state output = %#v, want index URL", destinationState.Outputs[0])
+	}
+}
+
 func TestRunFixedPathPublishesNewestBundleAtDestinationRoot(t *testing.T) {
 	sourceRoot := t.TempDir()
 	destinationRoot := t.TempDir()
@@ -1264,6 +1315,37 @@ pipelines:
 `)
 }
 
+func writeLocalConfigWithLinks(t *testing.T, sourceRoot, destinationRoot, pathMapping, baseURL, primary string, publishSource, publishHTML bool, transformMode string) string {
+	t.Helper()
+	transformConfig := ""
+	if publishHTML {
+		transformConfig = `
+        transform:
+          markdown_to_html:
+            enabled: true
+            mode: ` + transformMode
+	}
+	return writeConfigFile(t, `
+pipelines:
+  - id: reports
+    source:
+      backend: local
+      path: `+sourceRoot+`
+    destinations:
+      - id: archive
+        backend: local
+        path: `+destinationRoot+`
+        path_mapping:
+          mode: `+pathMapping+`
+        links:
+          base_url: `+baseURL+`
+          primary: `+primary+`
+        publish:
+          source: `+fmt.Sprintf("%t", publishSource)+`
+          html: `+fmt.Sprintf("%t", publishHTML)+transformConfig+`
+`)
+}
+
 func writeLocalConfigWithMarkdownTransform(t *testing.T, sourceRoot, destinationRoot string, publishSource, publishHTML bool, mode, input string) string {
 	t.Helper()
 	enabled := publishHTML
@@ -1344,6 +1426,14 @@ func readStateFile(t *testing.T, path string) state.DistributorState {
 	return testutil.ReadDestinationState(t, path)
 }
 
+func outputsByPath(outputs []state.OutputFile) map[string]state.OutputFile {
+	byPath := make(map[string]state.OutputFile, len(outputs))
+	for _, output := range outputs {
+		byPath[output.Path] = output
+	}
+	return byPath
+}
+
 func assertFile(t *testing.T, path, want string) {
 	t.Helper()
 	data, err := os.ReadFile(path)