vk_deps

Installs Vulkan SDK (if not already) as a build-step and exports the required environment variables for cargo to build against it.

Requirements

• pkg-config
• OpenSSL headers
  • Debian/Ubuntu: libssl-dev
  • Fedora/RHEL/Centos: openssl-devel
  • MacOS (brew): openssl

Usage

This library is intended to be used in a build.rs script, but may be adapted to other uses.

Example

// build.rs

extern crate vk_deps;

const VULKAN_VERSION: &'static str = "1.1.106.0";

fn main() {
    // ensure the specified vulkan version is installed
    let sdk = vk_deps::ensure(VULKAN_VERSION.to_string())
        .expect("failed to install Vulkan SDK");


    // emits cargo/rustc environment variables that set all needed env vars
    sdk.print_cargo_env();
}

Optional Environment Variables

Configuration of the installation can be done through the environment.

These options are in the environment and not code because they are options which should not persist in version control or even between developers. They are "personal choice" options in the case the defaults are not ideal.

All toggles support either 1 or true as on/true with all other values being off/false.

VULKAN_INSTALL_DEST

When set (to a valid string), the SDK will be extracted/installed as a child of this directory.

The version being extracted/installed will always be appended to the destination. The value of this variable must remain consistent across cargo runs or you may find that Vulkan is being reinstalled constantly or simply not found.

VULKAN_REINSTALL

Reinstalls Vulkan even if there exists an installation for this version.

The original directory is removed (if it existed) and a fresh copy is installed in its place.

VULKAN_KEEP_SOURCE

Keeps the file we downloaded for installation instead of deleting it.

The file is saved as a sibling to the install path. For example:

$HOME
├── .vulkan_sdk
│   ├── vulkan-1.1.106.0-linux.tar.gz
│   ├── 1.1.106.0/
│   │   ├── vulkan
│   │   ├── sdk
│   │   ├── files
│   │   └── here

When installing, whether providing VULKAN_REINSTALL=1 or a first-time install, we look for the source file to save time and bandwidth.

If this file becomes corrupted, it is the user's responsibility to delete it which clears the bad state and installation can continue from remote a file.