# Configuration Extension

As for all **`nmk`** projects config items, [**`nmk-rust`** ones](config.md) are all overridable by other plug-ins and project files. But the ones described on this page are specifically designed to be extended.

## Cargo configuration

Cargo config and manifest files generation can be configured by rust projects.

Following config items may be extended for that purpose:

* **{ref}`${rustConfigFileFragments}<rustConfigFileFragments>`**: additional cargo configuration file fragments
* **{ref}`${rustConfigFileItems}<rustConfigFileItems>`**: additional cargo configuration items
* **{ref}`${rustManifestFileFragments}<rustManifestFileFragments>`**: additional cargo manifest file fragments
* **{ref}`${rustManifestFileItems}<rustManifestFileItems>`**: additional cargo manifest items

## Rust package

The rust package handled by an **`nmk-rust`** project can be configured using the following items:

* **{ref}`${rustPackage}<rustPackage>`**: rust package name
* **{ref}`${rustEdition}<rustEdition>`**: rust edition to be used in generated manifest file

## Code format

To fine-tune code format of rust source files, an **`nmk-rust`** project can be configured using the following items:

* **{ref}`${rustLineLength}<rustLineLength>`**: rust code line length
* **{ref}`${rustFormatFileFragments}<rustFormatFileFragments>`**: additional rustfmt config file fragments
* **{ref}`${rustFormatFileItems}<rustFormatFileItems>`**: additional rustfmt config items
* **{ref}`${rustFormatExtraArgs}<rustFormatExtraArgs>`**: extra arguments for **`cargo fmt`** command