1use std::fs;
  2use zed::LanguageServerId;
  3use zed_extension_api::{self as zed, Result};
  4
  5struct ZigExtension {
  6    cached_binary_path: Option<String>,
  7}
  8
  9impl ZigExtension {
 10    fn language_server_binary_path(
 11        &mut self,
 12        language_server_id: &LanguageServerId,
 13        worktree: &zed::Worktree,
 14    ) -> Result<String> {
 15        if let Some(path) = &self.cached_binary_path {
 16            if fs::metadata(path).map_or(false, |stat| stat.is_file()) {
 17                return Ok(path.clone());
 18            }
 19        }
 20
 21        if let Some(path) = worktree.which("zls") {
 22            self.cached_binary_path = Some(path.clone());
 23            return Ok(path);
 24        }
 25
 26        zed::set_language_server_installation_status(
 27            &language_server_id,
 28            &zed::LanguageServerInstallationStatus::CheckingForUpdate,
 29        );
 30        let release = zed::latest_github_release(
 31            "zigtools/zls",
 32            zed::GithubReleaseOptions {
 33                require_assets: true,
 34                pre_release: false,
 35            },
 36        )?;
 37
 38        let (platform, arch) = zed::current_platform();
 39        let asset_name = format!(
 40            "zls-{arch}-{os}.{extension}",
 41            arch = match arch {
 42                zed::Architecture::Aarch64 => "aarch64",
 43                zed::Architecture::X86 => "x86",
 44                zed::Architecture::X8664 => "x86_64",
 45            },
 46            os = match platform {
 47                zed::Os::Mac => "macos",
 48                zed::Os::Linux => "linux",
 49                zed::Os::Windows => "windows",
 50            },
 51            extension = match platform {
 52                zed::Os::Mac | zed::Os::Linux => "tar.gz",
 53                zed::Os::Windows => "zip",
 54            }
 55        );
 56
 57        let asset = release
 58            .assets
 59            .iter()
 60            .find(|asset| asset.name == asset_name)
 61            .ok_or_else(|| format!("no asset found matching {:?}", asset_name))?;
 62
 63        let version_dir = format!("zls-{}", release.version);
 64        let binary_path = format!("{version_dir}/bin/zls");
 65
 66        if !fs::metadata(&binary_path).map_or(false, |stat| stat.is_file()) {
 67            zed::set_language_server_installation_status(
 68                &language_server_id,
 69                &zed::LanguageServerInstallationStatus::Downloading,
 70            );
 71
 72            zed::download_file(
 73                &asset.download_url,
 74                &version_dir,
 75                match platform {
 76                    zed::Os::Mac | zed::Os::Linux => zed::DownloadedFileType::GzipTar,
 77                    zed::Os::Windows => zed::DownloadedFileType::Zip,
 78                },
 79            )
 80            .map_err(|e| format!("failed to download file: {e}"))?;
 81
 82            zed::make_file_executable(&binary_path)?;
 83
 84            let entries =
 85                fs::read_dir(".").map_err(|e| format!("failed to list working directory {e}"))?;
 86            for entry in entries {
 87                let entry = entry.map_err(|e| format!("failed to load directory entry {e}"))?;
 88                if entry.file_name().to_str() != Some(&version_dir) {
 89                    fs::remove_dir_all(&entry.path()).ok();
 90                }
 91            }
 92        }
 93
 94        self.cached_binary_path = Some(binary_path.clone());
 95        Ok(binary_path)
 96    }
 97}
 98
 99impl zed::Extension for ZigExtension {
100    fn new() -> Self {
101        Self {
102            cached_binary_path: None,
103        }
104    }
105
106    fn language_server_command(
107        &mut self,
108        language_server_id: &LanguageServerId,
109        worktree: &zed::Worktree,
110    ) -> Result<zed::Command> {
111        Ok(zed::Command {
112            command: self.language_server_binary_path(language_server_id, worktree)?,
113            args: vec![],
114            env: Default::default(),
115        })
116    }
117}
118
119zed::register_extension!(ZigExtension);