use crate::{settings_store::SettingsStore, Settings};use fs::Fs;use futures::{channel::mpsc, StreamExt};use gpui::{App, BackgroundExecutor, ReadGlobal};use std::{path::PathBuf, sync::Arc, time::Duration}; pub const EMPTY_THEME_NAME: &str = "empty-theme"; #[cfg(any(test, feature = "test-support"))]pub fn test_settings() -> String {    let mut value = crate::settings_store::parse_json_with_comments::<serde_json::Value>(        crate::default_settings().as_ref(),    )    .unwrap();    #[cfg(not(target_os = "windows"))]    util::merge_non_null_json_value_into(        serde_json::json!({            "ui_font_family": "Courier",            "ui_font_features": {},            "ui_font_size": 14,            "ui_font_fallback": [],            "buffer_font_family": "Courier",            "buffer_font_features": {},            "buffer_font_size": 14,            "buffer_font_fallback": [],            "theme": EMPTY_THEME_NAME,        }),        &mut value,    );    #[cfg(target_os = "windows")]    util::merge_non_null_json_value_into(        serde_json::json!({            "ui_font_family": "Courier New",            "ui_font_features": {},            "ui_font_size": 14,            "ui_font_fallback": [],            "buffer_font_family": "Courier New",            "buffer_font_features": {},            "buffer_font_size": 14,            "buffer_font_fallback": [],            "theme": EMPTY_THEME_NAME,        }),        &mut value,    );    value.as_object_mut().unwrap().remove("languages");    serde_json::to_string(&value).unwrap()} pub fn watch_config_file(    executor: &BackgroundExecutor,    fs: Arc<dyn Fs>,    path: PathBuf,) -> mpsc::UnboundedReceiver<String> {    let (tx, rx) = mpsc::unbounded();    executor        .spawn(async move {            let (events, _) = fs.watch(&path, Duration::from_millis(100)).await;            futures::pin_mut!(events);             let contents = fs.load(&path).await.unwrap_or_default();            if tx.unbounded_send(contents).is_err() {                return;            }             loop {                if events.next().await.is_none() {                    break;                }                 if let Ok(contents) = fs.load(&path).await {                    if tx.unbounded_send(contents).is_err() {                        break;                    }                }            }        })        .detach();    rx} pub fn update_settings_file<T: Settings>(    fs: Arc<dyn Fs>,    cx: &App,    update: impl 'static + Send + FnOnce(&mut T::FileContent, &App),) {    SettingsStore::global(cx).update_settings_file::<T>(fs, update);}