Use native quoting for VS Code fallback

src/bin/dosh-client.rs

@@ -2727,17 +2727,23 @@ fn launch_vscode_remote(alias: &str, remote_path: Option<&str>) -> Result<()> {
     }
     if saw_not_found {
         println!(
-            "Run: code --remote {}{}",
-            shell_word(&remote),
-            remote_path
-                .map(|path| format!(" {}", shell_word(path)))
-                .unwrap_or_default()
+            "Run: {}",
+            vscode_fallback_command(std::env::consts::OS, &remote, remote_path)
         );
         return Ok(());
     }
     Err(anyhow!("no VS Code command candidates configured"))
 }
 
+fn vscode_fallback_command(os: &str, remote: &str, remote_path: Option<&str>) -> String {
+    let mut command = format!("code --remote {}", ssh_config_word_for_os(os, remote));
+    if let Some(path) = remote_path {
+        command.push(' ');
+        command.push_str(&ssh_config_word_for_os(os, path));
+    }
+    command
+}
+
 fn vscode_command_candidates(os: &str) -> &'static [&'static str] {
     if os == "windows" {
         &["code.cmd", "code.exe", "code"]
@@ -10633,11 +10639,12 @@ mod tests {
         summarize_trace_file_with_mode, terminal_private_mode_transition, toml_bare_key_or_quoted,
         top_trace_events, trace_report_warnings, unix_update_script,
         update_binary_version_for_installer, update_installer_url, update_version_status,
-        upsert_managed_block, valid_forward_host, vscode_command_candidates, vscode_safe_alias,
-        wake_repaint_retry_deadline, windows_command_word, windows_deferred_update_script,
-        windows_effective_url_script, windows_mode_from_readonly,
-        windows_powershell_command_candidates, windows_readonly_from_mode, windows_update_script,
-        windows_url_reachable_script, windows_vt_output_mode,
+        upsert_managed_block, valid_forward_host, vscode_command_candidates,
+        vscode_fallback_command, vscode_safe_alias, wake_repaint_retry_deadline,
+        windows_command_word, windows_deferred_update_script, windows_effective_url_script,
+        windows_mode_from_readonly, windows_powershell_command_candidates,
+        windows_readonly_from_mode, windows_update_script, windows_url_reachable_script,
+        windows_vt_output_mode,
     };
     use dosh::config::{ClientConfig, CommandExtension, HostConfig};
     use dosh::native::EnvVar;
@@ -10700,6 +10707,22 @@ mod tests {
         );
     }
 
+    #[test]
+    fn vscode_fallback_command_quotes_for_each_platform() {
+        assert_eq!(
+            vscode_fallback_command("macos", "ssh-remote+dosh-prod", Some("/srv/my app")),
+            "code --remote 'ssh-remote+dosh-prod' '/srv/my app'"
+        );
+        assert_eq!(
+            vscode_fallback_command(
+                "windows",
+                "ssh-remote+dosh-prod",
+                Some(r#"C:\Users\alice\My App"#)
+            ),
+            r#"code --remote "ssh-remote+dosh-prod" "C:\Users\alice\My App""#
+        );
+    }
+
     #[test]
     fn forward_agent_endpoint_disabled_is_none() {
         assert_eq!(resolve_forward_agent_endpoint(false).unwrap(), None);