Add Show Widget for library actions with Overview charts from last run output.

service/internal/runner/executor_test.go

@@ -15,6 +15,16 @@ func TestResolveItemLibraryAndLocal(t *testing.T) {
 			Body: "uptime",
 			Env:  []settings.ActionEnvVar{},
 		},
+		{
+			ID:   settings.BuiltinActionDiskUsageID,
+			Name: "Disk usage",
+			Kind: settings.ActionKindShell,
+			Body: "df -h {{env.MOUNT}}",
+			Env: []settings.ActionEnvVar{
+				{Name: "MOUNT", Value: "/"},
+				{Name: "EXTRA", Value: "lib"},
+			},
+		},
 	}
 
 	resolved, err := ResolveItem(settings.NodeActionItem{
@@ -29,6 +39,32 @@ func TestResolveItemLibraryAndLocal(t *testing.T) {
 		t.Fatalf("resolved = %#v", resolved)
 	}
 
+	merged, err := ResolveItem(settings.NodeActionItem{
+		ID:              "i-disk",
+		Source:          settings.ActionItemSourceLibrary,
+		LibraryActionID: settings.BuiltinActionDiskUsageID,
+		Env: []settings.ActionEnvVar{
+			{Name: "MOUNT", Value: "/data"},
+			{Name: "ITEM_ONLY", Value: "yes"},
+		},
+	}, library)
+	if err != nil {
+		t.Fatalf("ResolveItem merge: %v", err)
+	}
+	envByName := map[string]string{}
+	for _, envVar := range merged.Env {
+		envByName[envVar.Name] = envVar.Value
+	}
+	if envByName["MOUNT"] != "/data" {
+		t.Fatalf("MOUNT override = %#v", merged.Env)
+	}
+	if envByName["EXTRA"] != "lib" {
+		t.Fatalf("library EXTRA lost: %#v", merged.Env)
+	}
+	if envByName["ITEM_ONLY"] != "yes" {
+		t.Fatalf("item env missing: %#v", merged.Env)
+	}
+
 	local, err := ResolveItem(settings.NodeActionItem{
 		ID:     "i2",
 		Source: settings.ActionItemSourceLocal,