1use std::fs;
  2use zed::LanguageServerId;
  3use zed_extension_api::{self as zed, Result};
  4
  5struct TerraformExtension {
  6    cached_binary_path: Option<String>,
  7}
  8
  9impl TerraformExtension {
 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) = worktree.which("terraform-ls") {
 16            return Ok(path);
 17        }
 18
 19        if let Some(path) = &self.cached_binary_path {
 20            if fs::metadata(path).map_or(false, |stat| stat.is_file()) {
 21                return Ok(path.clone());
 22            }
 23        }
 24
 25        zed::set_language_server_installation_status(
 26            language_server_id,
 27            &zed::LanguageServerInstallationStatus::CheckingForUpdate,
 28        );
 29        let release = zed::latest_github_release(
 30            "hashicorp/terraform-ls",
 31            zed::GithubReleaseOptions {
 32                require_assets: false,
 33                pre_release: false,
 34            },
 35        )?;
 36
 37        let (platform, arch) = zed::current_platform();
 38        let download_url = format!(
 39            "https://releases.hashicorp.com/terraform-ls/{version}/terraform-ls_{version}_{os}_{arch}.zip",
 40            version = release.version.strip_prefix('v').unwrap_or(&release.version),
 41            os = match platform {
 42                zed::Os::Mac => "darwin",
 43                zed::Os::Linux => "linux",
 44                zed::Os::Windows => "windows",
 45            },
 46            arch = match arch {
 47                zed::Architecture::Aarch64 => "arm64",
 48                zed::Architecture::X86 => "386",
 49                zed::Architecture::X8664 => "amd64",
 50            },
 51        );
 52
 53        let version_dir = format!("terraform-ls-{}", release.version);
 54        let binary_path = format!("{version_dir}/terraform-ls");
 55
 56        if !fs::metadata(&binary_path).map_or(false, |stat| stat.is_file()) {
 57            zed::set_language_server_installation_status(
 58                language_server_id,
 59                &zed::LanguageServerInstallationStatus::Downloading,
 60            );
 61
 62            zed::download_file(&download_url, &version_dir, zed::DownloadedFileType::Zip)
 63                .map_err(|e| format!("failed to download file: {e}"))?;
 64
 65            zed::make_file_executable(&binary_path)?;
 66
 67            let entries =
 68                fs::read_dir(".").map_err(|e| format!("failed to list working directory {e}"))?;
 69            for entry in entries {
 70                let entry = entry.map_err(|e| format!("failed to load directory entry {e}"))?;
 71                if entry.file_name().to_str() != Some(&version_dir) {
 72                    fs::remove_dir_all(entry.path()).ok();
 73                }
 74            }
 75        }
 76
 77        self.cached_binary_path = Some(binary_path.clone());
 78        Ok(binary_path)
 79    }
 80}
 81
 82impl zed::Extension for TerraformExtension {
 83    fn new() -> Self {
 84        Self {
 85            cached_binary_path: None,
 86        }
 87    }
 88
 89    fn language_server_command(
 90        &mut self,
 91        language_server_id: &LanguageServerId,
 92        worktree: &zed::Worktree,
 93    ) -> Result<zed::Command> {
 94        Ok(zed::Command {
 95            command: self.language_server_binary_path(language_server_id, worktree)?,
 96            args: vec!["serve".to_string()],
 97            env: Default::default(),
 98        })
 99    }
100}
101
102zed::register_extension!(TerraformExtension);