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