[BUG] Scaffolding A Zome Fails on Windows Due to Path Canonicalization Issue

[ClayAmore]

Description

Scaffolding a zome fails on Windows due to issues with path canonicalization. The extended-length path prefix \\?\ remains in the path, which prevents the scaffolding tool from executing correctly. This issue occurs in the following function:

src\scaffold\app\cargo.rs::exec_metadata

The error message that appears is:

failed to load manifest for workspace member `\\?\C:\rust\test-app\dnas\*\zomes\coordinator\*`
referenced by workspace at `\\?\C:\rust\test-app\Cargo.toml`

Caused by:
  failed to read `\\?\C:\rust\test-app\dnas\*\zomes\coordinator\*\Cargo.toml`

Caused by:
  Filnavnet, mappenavnet eller volumnavnesyntaksen er feil. (os error 123)
`cargo metadata` exited with an error:

Expected behavior

The canonicalized path should not retain the \\?\ extended-length path prefix, allowing the tool to execute successfully.

System information

• OS: [Windows 10]
• Scaffolding Version: 4.0.0 and any version above

Steps to reproduce

1. Ensure extended-length path support is enabled on Windows.
2. Use the scaffolding tool to create a new web app and add a DNA and zome:

hc scaffold web-app`
cd {web-app-name}
hc scaffold dna
hc scaffold zome

3. The following error will occur:

failed to load manifest for workspace member `\\?\C:\rust\test-app\dnas\*\zomes\coordinator\*`
referenced by workspace at `\\?\C:\rust\test-app\Cargo.toml`

Caused by:
  failed to read `\\?\C:\rust\test-app\dnas\*\zomes\coordinator\*\Cargo.toml`

Caused by:
  Filnavnet, mappenavnet eller volumnavnesyntaksen er feil. (os error 123)
`cargo metadata` exited with an error:

Possible fix

To resolve this issue, the dunce crate can be used for path canonicalization, which avoids the extended-length path prefix.

Current code

src\scaffold\app\cargo.rs:161

let path = current_dir
    .join(workspace_cargo_toml_path(app_file_tree))
    .canonicalize()?;

Proposed fix:

let path = current_dir.join(workspace_cargo_toml_path(app_file_tree));
let path = dunce::canonicalize(path)?;