fn new()

in cargo-guppy/src/mv.rs [191:226]

• 30 lines of code
• 7 McCabe index (conditional complexity)

    fn new(pkg_graph: &PackageGraph, dest_dir: &Utf8Path) -> Result<Self> {
        let workspace = pkg_graph.workspace();
        let workspace_root = workspace.root();

        match dest_dir.canonicalize() {
            Ok(dest_dir) => {
                if !dest_dir.is_dir() {
                    bail!("destination {} is not a directory", dest_dir.display());
                }

                // The destination directory exists.
                Ok(DestDir::Exists(
                    rel_path(&dest_dir, workspace_root)?.to_path_buf(),
                ))
            }
            Err(err) if err.kind() == io::ErrorKind::NotFound => {
                // The destination directory doesn't exist and needs to be created.
                // Canonicalize the parent, then glue the last component to it.
                let last_component = dest_dir
                    .file_name()
                    .ok_or_else(|| eyre!("destination {} cannot end with ..", dest_dir))?;
                let parent = dest_dir
                    .parent()
                    .ok_or_else(|| eyre!("destination {} cannot end with ..", dest_dir))?;
                let parent = if parent.as_os_str() == "" {
                    Utf8Path::new(".")
                } else {
                    parent
                };

                let parent = canonicalize_dir(pkg_graph, parent)?;
                Ok(DestDir::Create(parent.join(last_component)))
            }
            Err(err) => Err(err).wrap_err_with(|| eyre!("reading destination {} failed", dest_dir)),
        }
    }