tauri-apps/tauri · error

Couldn't get parent of target path

Error message

Couldn't get parent of target path

What it means

In generate_resource_data, each bundled resource's target path inside the installer is split into a parent directory and file name via Path::parent().expect(). If the resource target path has no parent (a bare relative file name like 'foo.txt' with no directory component), the panic "Couldn't get parent of target path" is raised.

Solutions

1. Give the resource destination a directory component, e.g. map to 'data/file.txt' instead of 'file.txt'.
2. Check the resources config in tauri.conf.json for entries that resolve to bare filenames and add the intended destination directory.
3. Ensure custom target-path rewriting (if any plugin/code modifies targets) always produces a path with a parent.

Example fix

// before (tauri.conf.json)
"resources": {"./legal.txt": "legal.txt"}
// after
"resources": {"./legal.txt": "docs/legal.txt"}

// Validate resources config before building: every destination must have a directory component
use std::path::Path;
fn dest_ok(dest: &str) -> bool {
  Path::new(dest).parent().map(|p| !p.as_os_str().is_empty()).unwrap_or(false)
}
// assert every mapped destination passes dest_ok()

fn has_parent(p: &std::path::Path) -> bool {
  p.parent().map(|parent| !parent.as_os_str().is_empty()).unwrap_or(false)
}

When it happens

Trigger: build_nsis_app_installer -> generate_resource_data when a resource listed in tauri.conf.json maps to a target path that is a bare filename with no directory prefix (Path::parent() returns Some only when there is a directory component).

Common situations: Resources map in tauri.conf.json written as {"resources": ["file.txt"]} combined with target rewriting, or a map entry whose destination is just a filename instead of a destination directory; typos producing a single-component path.

Understand the failure class

Background: "Must be a positive integer", "Invalid value", "Unsupported": the invalid-argument-value error family, when a library rejects the value you pass — this error's family across 35 libraries.

Related errors

• failed to extract external binary filename
• failed to extract Visual C++ runtime DLL filename
• Failed to bundle app with makensis
• failed to read resource file name
• Failed to setup handlebar template

AI-assisted analysis of tauri-apps/tauri@460ec35447 (2026-09-18). Data as JSON: /api/errors/649bf62c606f7379. Report an issue: GitHub.

Appendix: source

Thrown at crates/tauri-bundler/src/bundle/windows/nsis/mod.rs:848

    // In some glob resource paths like `assets/**/*` a file might appear twice
    // because the `tauri_utils::resources::ResourcePaths` iterator also reads a directory
    // when it finds one. So we must check it before processing the file.
    if added_resources.contains(&resource_path) {
      continue;
    }
    added_resources.push(resource_path.clone());

    if settings.windows().can_sign() && should_sign(&resource_path)? {
      try_sign(&resource_path, settings)?;
    }

    let target_path = resource.target();
    resources.insert(
      resource_path,
      (
        target_path
          .parent()
          .expect("Couldn't get parent of target path")
          .to_path_buf(),
        target_path.to_path_buf(),
      ),
    );
  }

  Ok(resources)
}

/// BTreeMap<OriginalPath, TargetFileName>
type BinariesMap = BTreeMap<PathBuf, String>;
fn generate_binaries_data(settings: &Settings) -> crate::Result<BinariesMap> {
  let mut binaries = BinariesMap::new();
  let cwd = std::env::current_dir()?;

  for src in settings.external_binaries() {
    let src = src?;
    let binary_path = dunce::canonicalize(cwd.join(&src))?;

View on GitHub (pinned to 460ec35447)