use std::{env, fs};use zed::settings::LspSettings;use zed_extension_api::{self as zed, LanguageServerId, Result, serde_json::json}; const BINARY_NAME: &str = "vscode-html-language-server";const SERVER_PATH: &str =    "node_modules/@zed-industries/vscode-langservers-extracted/bin/vscode-html-language-server";const PACKAGE_NAME: &str = "@zed-industries/vscode-langservers-extracted"; struct HtmlExtension {    cached_binary_path: Option<String>,} impl HtmlExtension {    fn server_exists(&self) -> bool {        fs::metadata(SERVER_PATH).is_ok_and(|stat| stat.is_file())    }     fn server_script_path(&mut self, language_server_id: &LanguageServerId) -> Result<String> {        let server_exists = self.server_exists();        if self.cached_binary_path.is_some() && server_exists {            return Ok(SERVER_PATH.to_string());        }         zed::set_language_server_installation_status(            language_server_id,            &zed::LanguageServerInstallationStatus::CheckingForUpdate,        );        let version = zed::npm_package_latest_version(PACKAGE_NAME)?;         if !server_exists            || zed::npm_package_installed_version(PACKAGE_NAME)?.as_ref() != Some(&version)        {            zed::set_language_server_installation_status(                language_server_id,                &zed::LanguageServerInstallationStatus::Downloading,            );            let result = zed::npm_install_package(PACKAGE_NAME, &version);            match result {                Ok(()) => {                    if !self.server_exists() {                        Err(format!(                            "installed package '{PACKAGE_NAME}' did not contain expected path '{SERVER_PATH}'",                        ))?;                    }                }                Err(error) => {                    if !self.server_exists() {                        Err(error)?;                    }                }            }        }        Ok(SERVER_PATH.to_string())    }} impl zed::Extension for HtmlExtension {    fn new() -> Self {        Self {            cached_binary_path: None,        }    }     fn language_server_command(        &mut self,        language_server_id: &LanguageServerId,        worktree: &zed::Worktree,    ) -> Result<zed::Command> {        let server_path = if let Some(path) = worktree.which(BINARY_NAME) {            return Ok(zed::Command {                command: path,                args: vec!["--stdio".to_string()],                env: Default::default(),            });        } else {            let server_path = self.server_script_path(language_server_id)?;            env::current_dir()                .unwrap()                .join(&server_path)                .to_string_lossy()                .to_string()        };        self.cached_binary_path = Some(server_path.clone());         Ok(zed::Command {            command: zed::node_binary_path()?,            args: vec![server_path, "--stdio".to_string()],            env: Default::default(),        })    }     fn language_server_workspace_configuration(        &mut self,        server_id: &LanguageServerId,        worktree: &zed::Worktree,    ) -> Result<Option<zed::serde_json::Value>> {        LspSettings::for_worktree(server_id.as_ref(), worktree)            .map(|lsp_settings| lsp_settings.settings)    }     fn language_server_initialization_options(        &mut self,        _server_id: &LanguageServerId,        _worktree: &zed_extension_api::Worktree,    ) -> Result<Option<zed_extension_api::serde_json::Value>> {        let initialization_options = json!({"provideFormatter": true });        Ok(Some(initialization_options))    }} zed::register_extension!(HtmlExtension);