1use std::fs;
  2use zed::LanguageServerId;
  3use zed_extension_api::settings::LspSettings;
  4use zed_extension_api::{self as zed, Result};
  5
  6struct TaploBinary {
  7    path: String,
  8    args: Option<Vec<String>>,
  9}
 10
 11struct TomlExtension {
 12    cached_binary_path: Option<String>,
 13}
 14
 15impl TomlExtension {
 16    fn language_server_binary(
 17        &mut self,
 18        language_server_id: &LanguageServerId,
 19        worktree: &zed::Worktree,
 20    ) -> Result<TaploBinary> {
 21        let binary_settings = LspSettings::for_worktree("taplo", worktree)
 22            .ok()
 23            .and_then(|lsp_settings| lsp_settings.binary);
 24        let binary_args = binary_settings
 25            .as_ref()
 26            .and_then(|binary_settings| binary_settings.arguments.clone());
 27
 28        if let Some(path) = binary_settings.and_then(|binary_settings| binary_settings.path) {
 29            return Ok(TaploBinary {
 30                path,
 31                args: binary_args,
 32            });
 33        }
 34
 35        if let Some(path) = worktree.which("taplo") {
 36            return Ok(TaploBinary {
 37                path,
 38                args: binary_args,
 39            });
 40        }
 41
 42        if let Some(path) = &self.cached_binary_path
 43            && fs::metadata(path).map_or(false, |stat| stat.is_file()) {
 44                return Ok(TaploBinary {
 45                    path: path.clone(),
 46                    args: binary_args,
 47                });
 48            }
 49
 50        zed::set_language_server_installation_status(
 51            language_server_id,
 52            &zed::LanguageServerInstallationStatus::CheckingForUpdate,
 53        );
 54        let release = zed::latest_github_release(
 55            "tamasfe/taplo",
 56            zed::GithubReleaseOptions {
 57                require_assets: true,
 58                pre_release: false,
 59            },
 60        )?;
 61
 62        let (platform, arch) = zed::current_platform();
 63        let asset_name = format!(
 64            "taplo-{os}-{arch}.gz",
 65            arch = match arch {
 66                zed::Architecture::Aarch64 => "aarch64",
 67                zed::Architecture::X86 => "x86",
 68                zed::Architecture::X8664 => "x86_64",
 69            },
 70            os = match platform {
 71                zed::Os::Mac => "darwin",
 72                zed::Os::Linux => "linux",
 73                zed::Os::Windows => "windows",
 74            },
 75        );
 76
 77        let asset = release
 78            .assets
 79            .iter()
 80            .find(|asset| asset.name == asset_name)
 81            .ok_or_else(|| format!("no asset found matching {:?}", asset_name))?;
 82
 83        let version_dir = format!("taplo-{}", release.version);
 84        fs::create_dir_all(&version_dir)
 85            .map_err(|err| format!("failed to create directory '{version_dir}': {err}"))?;
 86
 87        let binary_path = format!(
 88            "{version_dir}/{bin_name}",
 89            bin_name = match platform {
 90                zed::Os::Windows => "taplo.exe",
 91                zed::Os::Mac | zed::Os::Linux => "taplo",
 92            }
 93        );
 94
 95        if !fs::metadata(&binary_path).map_or(false, |stat| stat.is_file()) {
 96            zed::set_language_server_installation_status(
 97                language_server_id,
 98                &zed::LanguageServerInstallationStatus::Downloading,
 99            );
100
101            zed::download_file(
102                &asset.download_url,
103                &binary_path,
104                zed::DownloadedFileType::Gzip,
105            )
106            .map_err(|err| format!("failed to download file: {err}"))?;
107
108            zed::make_file_executable(&binary_path)?;
109
110            let entries = fs::read_dir(".")
111                .map_err(|err| format!("failed to list working directory {err}"))?;
112            for entry in entries {
113                let entry = entry.map_err(|err| format!("failed to load directory entry {err}"))?;
114                if entry.file_name().to_str() != Some(&version_dir) {
115                    fs::remove_dir_all(entry.path()).ok();
116                }
117            }
118        }
119
120        self.cached_binary_path = Some(binary_path.clone());
121        Ok(TaploBinary {
122            path: binary_path,
123            args: binary_args,
124        })
125    }
126}
127
128impl zed::Extension for TomlExtension {
129    fn new() -> Self {
130        Self {
131            cached_binary_path: None,
132        }
133    }
134
135    fn language_server_command(
136        &mut self,
137        language_server_id: &LanguageServerId,
138        worktree: &zed::Worktree,
139    ) -> Result<zed::Command> {
140        let taplo_binary = self.language_server_binary(language_server_id, worktree)?;
141        Ok(zed::Command {
142            command: taplo_binary.path,
143            args: taplo_binary
144                .args
145                .unwrap_or_else(|| vec!["lsp".to_string(), "stdio".to_string()]),
146            env: Default::default(),
147        })
148    }
149}
150
151zed::register_extension!(TomlExtension);