1use std::fs;
  2use zed::LanguageServerId;
  3use zed_extension_api::{self as zed, Result};
  4
  5struct TomlExtension {
  6    cached_binary_path: Option<String>,
  7}
  8
  9impl TomlExtension {
 10    fn language_server_binary_path(
 11        &mut self,
 12        language_server_id: &LanguageServerId,
 13    ) -> Result<String> {
 14        if let Some(path) = &self.cached_binary_path {
 15            if fs::metadata(path).map_or(false, |stat| stat.is_file()) {
 16                return Ok(path.clone());
 17            }
 18        }
 19
 20        zed::set_language_server_installation_status(
 21            language_server_id,
 22            &zed::LanguageServerInstallationStatus::CheckingForUpdate,
 23        );
 24        let release = zed::latest_github_release(
 25            "tamasfe/taplo",
 26            zed::GithubReleaseOptions {
 27                require_assets: true,
 28                pre_release: false,
 29            },
 30        )?;
 31
 32        let (platform, arch) = zed::current_platform();
 33        let asset_name = format!(
 34            "taplo-full-{os}-{arch}.gz",
 35            arch = match arch {
 36                zed::Architecture::Aarch64 => "aarch64",
 37                zed::Architecture::X86 => "x86",
 38                zed::Architecture::X8664 => "x86_64",
 39            },
 40            os = match platform {
 41                zed::Os::Mac => "darwin",
 42                zed::Os::Linux => "linux",
 43                zed::Os::Windows => "windows",
 44            },
 45        );
 46
 47        let asset = release
 48            .assets
 49            .iter()
 50            .find(|asset| asset.name == asset_name)
 51            .ok_or_else(|| format!("no asset found matching {:?}", asset_name))?;
 52
 53        let version_dir = format!("taplo-{}", release.version);
 54        fs::create_dir_all(&version_dir)
 55            .map_err(|err| format!("failed to create directory '{version_dir}': {err}"))?;
 56
 57        let binary_path = format!(
 58            "{version_dir}/{bin_name}",
 59            bin_name = match platform {
 60                zed::Os::Windows => "taplo.exe",
 61                zed::Os::Mac | zed::Os::Linux => "taplo",
 62            }
 63        );
 64
 65        if !fs::metadata(&binary_path).map_or(false, |stat| stat.is_file()) {
 66            zed::set_language_server_installation_status(
 67                language_server_id,
 68                &zed::LanguageServerInstallationStatus::Downloading,
 69            );
 70
 71            zed::download_file(
 72                &asset.download_url,
 73                &binary_path,
 74                zed::DownloadedFileType::Gzip,
 75            )
 76            .map_err(|err| format!("failed to download file: {err}"))?;
 77
 78            zed::make_file_executable(&binary_path)?;
 79
 80            let entries = fs::read_dir(".")
 81                .map_err(|err| format!("failed to list working directory {err}"))?;
 82            for entry in entries {
 83                let entry = entry.map_err(|err| format!("failed to load directory entry {err}"))?;
 84                if entry.file_name().to_str() != Some(&version_dir) {
 85                    fs::remove_dir_all(entry.path()).ok();
 86                }
 87            }
 88        }
 89
 90        self.cached_binary_path = Some(binary_path.clone());
 91        Ok(binary_path)
 92    }
 93}
 94
 95impl zed::Extension for TomlExtension {
 96    fn new() -> Self {
 97        Self {
 98            cached_binary_path: None,
 99        }
100    }
101
102    fn language_server_command(
103        &mut self,
104        language_server_id: &LanguageServerId,
105        _worktree: &zed::Worktree,
106    ) -> Result<zed::Command> {
107        Ok(zed::Command {
108            command: self.language_server_binary_path(language_server_id)?,
109            args: vec!["lsp".to_string(), "stdio".to_string()],
110            env: Default::default(),
111        })
112    }
113}
114
115zed::register_extension!(TomlExtension);