1use std::fs;
  2use zed_extension_api::{self as zed, Result};
  3
  4struct TomlExtension {
  5    cached_binary_path: Option<String>,
  6}
  7
  8impl TomlExtension {
  9    fn language_server_binary_path(&mut self, config: zed::LanguageServerConfig) -> Result<String> {
 10        if let Some(path) = &self.cached_binary_path {
 11            if fs::metadata(path).map_or(false, |stat| stat.is_file()) {
 12                return Ok(path.clone());
 13            }
 14        }
 15
 16        zed::set_language_server_installation_status(
 17            &config.name,
 18            &zed::LanguageServerInstallationStatus::CheckingForUpdate,
 19        );
 20        let release = zed::latest_github_release(
 21            "tamasfe/taplo",
 22            zed::GithubReleaseOptions {
 23                require_assets: true,
 24                pre_release: false,
 25            },
 26        )?;
 27
 28        let (platform, arch) = zed::current_platform();
 29        let asset_name = format!(
 30            "taplo-full-{os}-{arch}.{extension}",
 31            arch = match arch {
 32                zed::Architecture::Aarch64 => "aarch64",
 33                zed::Architecture::X86 => "x86",
 34                zed::Architecture::X8664 => "x86_64",
 35            },
 36            os = match platform {
 37                zed::Os::Mac => "darwin",
 38                zed::Os::Linux => "linux",
 39                zed::Os::Windows => "windows",
 40            },
 41            extension = match platform {
 42                zed::Os::Mac | zed::Os::Linux => "gz",
 43                zed::Os::Windows => "zip",
 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!("{version_dir}/taplo");
 58
 59        if !fs::metadata(&binary_path).map_or(false, |stat| stat.is_file()) {
 60            zed::set_language_server_installation_status(
 61                &config.name,
 62                &zed::LanguageServerInstallationStatus::Downloading,
 63            );
 64
 65            zed::download_file(
 66                &asset.download_url,
 67                &binary_path,
 68                match platform {
 69                    zed::Os::Mac | zed::Os::Linux => zed::DownloadedFileType::Gzip,
 70                    zed::Os::Windows => zed::DownloadedFileType::Zip,
 71                },
 72            )
 73            .map_err(|err| format!("failed to download file: {err}"))?;
 74
 75            zed::make_file_executable(&binary_path)?;
 76
 77            let entries = fs::read_dir(".")
 78                .map_err(|err| format!("failed to list working directory {err}"))?;
 79            for entry in entries {
 80                let entry = entry.map_err(|err| format!("failed to load directory entry {err}"))?;
 81                if entry.file_name().to_str() != Some(&version_dir) {
 82                    fs::remove_dir_all(&entry.path()).ok();
 83                }
 84            }
 85        }
 86
 87        self.cached_binary_path = Some(binary_path.clone());
 88        Ok(binary_path)
 89    }
 90}
 91
 92impl zed::Extension for TomlExtension {
 93    fn new() -> Self {
 94        Self {
 95            cached_binary_path: None,
 96        }
 97    }
 98
 99    fn language_server_command(
100        &mut self,
101        config: zed::LanguageServerConfig,
102        _worktree: &zed::Worktree,
103    ) -> Result<zed::Command> {
104        Ok(zed::Command {
105            command: self.language_server_binary_path(config)?,
106            args: vec!["lsp".to_string(), "stdio".to_string()],
107            env: Default::default(),
108        })
109    }
110}
111
112zed::register_extension!(TomlExtension);