use serde_json::json;use std::fs;use zed::LanguageServerId;use zed_extension_api::{self as zed, settings::LspSettings, Result}; struct SnippetExtension {    cached_binary_path: Option<String>,} impl SnippetExtension {    fn language_server_binary_path(        &mut self,        language_server_id: &LanguageServerId,        worktree: &zed::Worktree,    ) -> Result<String> {        if let Some(path) = worktree.which("simple-completion-language-server") {            return Ok(path);        }         if let Some(path) = &self.cached_binary_path {            if fs::metadata(path).map_or(false, |stat| stat.is_file()) {                return Ok(path.clone());            }        }         zed::set_language_server_installation_status(            language_server_id,            &zed::LanguageServerInstallationStatus::CheckingForUpdate,        );        let release = zed::latest_github_release(            "zed-industries/simple-completion-language-server",            zed::GithubReleaseOptions {                require_assets: true,                pre_release: false,            },        )?;         let (platform, arch) = zed::current_platform();        let asset_name = format!(            "simple-completion-language-server-{arch}-{os}.tar.gz",            arch = match arch {                zed::Architecture::Aarch64 => "aarch64",                zed::Architecture::X86 => "x86",                zed::Architecture::X8664 => "x86_64",            },            os = match platform {                zed::Os::Mac => "apple-darwin",                zed::Os::Linux => "unknown-linux-gnu",                zed::Os::Windows => "pc-windows-msvc",            },        );         let asset = release            .assets            .iter()            .find(|asset| asset.name == asset_name)            .ok_or_else(|| format!("no asset found matching {:?}", asset_name))?;         let version_dir = format!("simple-completion-language-server-{}", release.version);        let binary_path = format!("{version_dir}/simple-completion-language-server");         if !fs::metadata(&binary_path).map_or(false, |stat| stat.is_file()) {            zed::set_language_server_installation_status(                language_server_id,                &zed::LanguageServerInstallationStatus::Downloading,            );             zed::download_file(                &asset.download_url,                &version_dir,                zed::DownloadedFileType::GzipTar,            )            .map_err(|e| format!("failed to download file: {e}"))?;             let entries =                fs::read_dir(".").map_err(|e| format!("failed to list working directory {e}"))?;            for entry in entries {                let entry = entry.map_err(|e| format!("failed to load directory entry {e}"))?;                if entry.file_name().to_str() != Some(&version_dir) {                    fs::remove_dir_all(entry.path()).ok();                }            }        }         self.cached_binary_path = Some(binary_path.clone());        Ok(binary_path)    }} impl zed::Extension for SnippetExtension {    fn new() -> Self {        Self {            cached_binary_path: None,        }    }     fn language_server_command(        &mut self,        language_server_id: &LanguageServerId,        worktree: &zed::Worktree,    ) -> Result<zed::Command> {        Ok(zed::Command {            command: self.language_server_binary_path(language_server_id, worktree)?,            args: vec![],            env: vec![("SCLS_CONFIG_SUBDIRECTORY".to_owned(), "zed".to_owned())],        })    }     fn language_server_workspace_configuration(        &mut self,        server_id: &LanguageServerId,        worktree: &zed_extension_api::Worktree,    ) -> Result<Option<zed_extension_api::serde_json::Value>> {        let settings = LspSettings::for_worktree(server_id.as_ref(), worktree)            .ok()            .and_then(|lsp_settings| lsp_settings.settings.clone())            .unwrap_or_else(|| {                json!({                    "max_completion_items": 20,                    "snippets_first": true,                    "feature_words": false,                    "feature_snippets": true,                    "feature_paths": true                })            });        Ok(Some(settings))    }} zed::register_extension!(SnippetExtension);