use std::fs;use zed::LanguageServerId;use zed_extension_api::{self as zed, Result}; struct TerraformExtension {    cached_binary_path: Option<String>,} impl TerraformExtension {    fn language_server_binary_path(        &mut self,        language_server_id: &LanguageServerId,        worktree: &zed::Worktree,    ) -> Result<String> {        if let Some(path) = worktree.which("terraform-ls") {            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(            "hashicorp/terraform-ls",            zed::GithubReleaseOptions {                require_assets: false,                pre_release: false,            },        )?;         let (platform, arch) = zed::current_platform();        let download_url = format!(            "https://releases.hashicorp.com/terraform-ls/{version}/terraform-ls_{version}_{os}_{arch}.zip",            version = release.version.strip_prefix('v').unwrap_or(&release.version),            os = match platform {                zed::Os::Mac => "darwin",                zed::Os::Linux => "linux",                zed::Os::Windows => "windows",            },            arch = match arch {                zed::Architecture::Aarch64 => "arm64",                zed::Architecture::X86 => "386",                zed::Architecture::X8664 => "amd64",            },        );         let version_dir = format!("terraform-ls-{}", release.version);        let binary_path = format!("{version_dir}/terraform-ls");         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(&download_url, &version_dir, zed::DownloadedFileType::Zip)                .map_err(|e| format!("failed to download file: {e}"))?;             zed::make_file_executable(&binary_path)?;             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 TerraformExtension {    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!["serve".to_string()],            env: Default::default(),        })    }} zed::register_extension!(TerraformExtension);