1use std::fs;
  2use zed::LanguageServerId;
  3use zed_extension_api::{self as zed, Result};
  4
  5struct ZigExtension {
  6    cached_binary: Option<ZlsBinary>,
  7}
  8
  9#[derive(Clone)]
 10struct ZlsBinary {
 11    path: String,
 12    environment: Option<Vec<(String, String)>>,
 13}
 14
 15impl ZigExtension {
 16    fn language_server_binary(
 17        &mut self,
 18        language_server_id: &LanguageServerId,
 19        worktree: &zed::Worktree,
 20    ) -> Result<ZlsBinary> {
 21        if let Some(zls_binary) = &self.cached_binary {
 22            if fs::metadata(&zls_binary.path).map_or(false, |stat| stat.is_file()) {
 23                return Ok(zls_binary.clone());
 24            }
 25        }
 26
 27        if let Some(path) = worktree.which("zls") {
 28            let environment = worktree.shell_env();
 29            let zls_binary = ZlsBinary {
 30                path,
 31                environment: Some(environment),
 32            };
 33            self.cached_binary = Some(zls_binary.clone());
 34            return Ok(zls_binary);
 35        }
 36
 37        zed::set_language_server_installation_status(
 38            &language_server_id,
 39            &zed::LanguageServerInstallationStatus::CheckingForUpdate,
 40        );
 41        let release = zed::latest_github_release(
 42            "zigtools/zls",
 43            zed::GithubReleaseOptions {
 44                require_assets: true,
 45                pre_release: false,
 46            },
 47        )?;
 48
 49        let (platform, arch) = zed::current_platform();
 50        let asset_name = format!(
 51            "zls-{arch}-{os}.{extension}",
 52            arch = match arch {
 53                zed::Architecture::Aarch64 => "aarch64",
 54                zed::Architecture::X86 => "x86",
 55                zed::Architecture::X8664 => "x86_64",
 56            },
 57            os = match platform {
 58                zed::Os::Mac => "macos",
 59                zed::Os::Linux => "linux",
 60                zed::Os::Windows => "windows",
 61            },
 62            extension = match platform {
 63                zed::Os::Mac | zed::Os::Linux => "tar.gz",
 64                zed::Os::Windows => "zip",
 65            }
 66        );
 67
 68        let asset = release
 69            .assets
 70            .iter()
 71            .find(|asset| asset.name == asset_name)
 72            .ok_or_else(|| format!("no asset found matching {:?}", asset_name))?;
 73
 74        let version_dir = format!("zls-{}", release.version);
 75        let binary_path = format!("{version_dir}/bin/zls");
 76
 77        if !fs::metadata(&binary_path).map_or(false, |stat| stat.is_file()) {
 78            zed::set_language_server_installation_status(
 79                &language_server_id,
 80                &zed::LanguageServerInstallationStatus::Downloading,
 81            );
 82
 83            zed::download_file(
 84                &asset.download_url,
 85                &version_dir,
 86                match platform {
 87                    zed::Os::Mac | zed::Os::Linux => zed::DownloadedFileType::GzipTar,
 88                    zed::Os::Windows => zed::DownloadedFileType::Zip,
 89                },
 90            )
 91            .map_err(|e| format!("failed to download file: {e}"))?;
 92
 93            zed::make_file_executable(&binary_path)?;
 94
 95            let entries =
 96                fs::read_dir(".").map_err(|e| format!("failed to list working directory {e}"))?;
 97            for entry in entries {
 98                let entry = entry.map_err(|e| format!("failed to load directory entry {e}"))?;
 99                if entry.file_name().to_str() != Some(&version_dir) {
100                    fs::remove_dir_all(&entry.path()).ok();
101                }
102            }
103        }
104
105        let zls_binary = ZlsBinary {
106            path: binary_path,
107            environment: None,
108        };
109        self.cached_binary = Some(zls_binary.clone());
110        Ok(zls_binary)
111    }
112}
113
114impl zed::Extension for ZigExtension {
115    fn new() -> Self {
116        Self {
117            cached_binary: None,
118        }
119    }
120
121    fn language_server_command(
122        &mut self,
123        language_server_id: &LanguageServerId,
124        worktree: &zed::Worktree,
125    ) -> Result<zed::Command> {
126        let zls_binary = self.language_server_binary(language_server_id, worktree)?;
127        Ok(zed::Command {
128            command: zls_binary.path,
129            args: vec![],
130            env: zls_binary.environment.unwrap_or_default(),
131        })
132    }
133}
134
135zed::register_extension!(ZigExtension);