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}.{extension}",
 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            extension = match platform {
 46                zed::Os::Mac | zed::Os::Linux => "gz",
 47                zed::Os::Windows => "zip",
 48            }
 49        );
 50
 51        let asset = release
 52            .assets
 53            .iter()
 54            .find(|asset| asset.name == asset_name)
 55            .ok_or_else(|| format!("no asset found matching {:?}", asset_name))?;
 56
 57        let version_dir = format!("taplo-{}", release.version);
 58        fs::create_dir_all(&version_dir)
 59            .map_err(|err| format!("failed to create directory '{version_dir}': {err}"))?;
 60
 61        let binary_path = format!("{version_dir}/taplo");
 62
 63        if !fs::metadata(&binary_path).map_or(false, |stat| stat.is_file()) {
 64            zed::set_language_server_installation_status(
 65                &language_server_id,
 66                &zed::LanguageServerInstallationStatus::Downloading,
 67            );
 68
 69            zed::download_file(
 70                &asset.download_url,
 71                &binary_path,
 72                match platform {
 73                    zed::Os::Mac | zed::Os::Linux => zed::DownloadedFileType::Gzip,
 74                    zed::Os::Windows => zed::DownloadedFileType::Zip,
 75                },
 76            )
 77            .map_err(|err| format!("failed to download file: {err}"))?;
 78
 79            zed::make_file_executable(&binary_path)?;
 80
 81            let entries = fs::read_dir(".")
 82                .map_err(|err| format!("failed to list working directory {err}"))?;
 83            for entry in entries {
 84                let entry = entry.map_err(|err| format!("failed to load directory entry {err}"))?;
 85                if entry.file_name().to_str() != Some(&version_dir) {
 86                    fs::remove_dir_all(&entry.path()).ok();
 87                }
 88            }
 89        }
 90
 91        self.cached_binary_path = Some(binary_path.clone());
 92        Ok(binary_path)
 93    }
 94}
 95
 96impl zed::Extension for TomlExtension {
 97    fn new() -> Self {
 98        Self {
 99            cached_binary_path: None,
100        }
101    }
102
103    fn language_server_command(
104        &mut self,
105        language_server_id: &LanguageServerId,
106        _worktree: &zed::Worktree,
107    ) -> Result<zed::Command> {
108        Ok(zed::Command {
109            command: self.language_server_binary_path(language_server_id)?,
110            args: vec!["lsp".to_string(), "stdio".to_string()],
111            env: Default::default(),
112        })
113    }
114}
115
116zed::register_extension!(TomlExtension);