// Copyright 2025 The Jujutsu Authors//// Licensed under the Apache License, Version 2.0 (the "License");// you may not use this file except in compliance with the License.// You may obtain a copy of the License at//// https://www.apache.org/licenses/LICENSE-2.0//// Unless required by applicable law or agreed to in writing, software// distributed under the License is distributed on an "AS IS" BASIS,// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.// See the License for the specific language governing permissions and// limitations under the License. /// Produce a synthetic JSON document containing a default config according to/// the schema.////// # Limitations/// Defaults in `"additionalProperties"` are ignored, as are those in/// `"definitions"` nodes (which might be referenced by `"$ref"`).pub fn default_config_from_schema() -> serde_json::Value {    fn visit(schema: &serde_json::Value) -> Option<serde_json::Value> {        let schema = schema.as_object().expect("schemas to be objects");        if let Some(default) = schema.get("default") {            Some(default.clone())        } else if let Some(properties) = schema.get("properties") {            let prop_defaults: serde_json::Map<_, _> = properties                .as_object()                .expect("`properties` to be an object")                .iter()                .filter_map(|(prop_name, prop_schema)| {                    visit(prop_schema).map(|prop_default| (prop_name.clone(), prop_default))                })                .collect();            (!prop_defaults.is_empty()).then_some(serde_json::Value::Object(prop_defaults))        } else {            None        }    }     visit(        &serde_json::from_str(include_str!("../../src/config-schema.json"))            .expect("`config-schema.json` to be valid JSON"),    )    .expect("some settings to have defaults")}