A cargo plugin to easily build Swift packages from Rust code
cargo swift provides interactive commands for initializing and packaging a Rust library as Swift Package for usage in iOS and macOS apps. This plugin uses Mozilla's UniFFI for bridging between Swift and Rust. To learn more about using UniFFI, read its User Guide, but note that you can skip the parts about generating bindings and building a swift module as cargo swift already takes care of this!
Note This plugin can only be used on macOS, since proprietary toolchains are required for this plugin to work properly.
Install this plugin, simply run
cargo install cargo-swift
You can create a new library crate by running
cargo swift init
This creates a new Rust library crate with some boilerplate code and some examples to quickly get started with UniFFI. For full reference, check out this chapter of the UniFFI User Guide
To bundle the previously created Rust library as Swift Package, run:
cargo swift package
This command interactively prompts you for swift package name and target platforms. If some required toolchains for the selected target platforms are missing, cargo swift will ask you if it should install them automatically.
That's it! You can now include the created package in an iOS or macOS app via Swift Package Manager.
Warning This section describes a feature that is not yet implemented.
Configuration options can be supplied to cargo-swift in multiple ways:
- Command-line arguments (i.e.
--platforms macos ios) - Meta-data under
[package.metadata.swiftpackage]tag in crate-level Cargo.toml - Meta-data under
[workspace.metadata.swiftpackage]tag in workspace-level Cargo.toml - Prompt configuration values that are not provided by the methods above
These configuration values take precedence over each other in the order listed above, so an explicitly given command-line argument will always override a value given in the config file.
cargo swift package can be invoked with the --save option to store all given configuration values in the crate's Cargo.toml. Alternatively, they can be filled in manually.
The following configuration values can be included:
# ...
[package.metadata.swiftpackage]
# Name of your package as seen by Swift (upper camel case is recommended)
name = "YourSwiftPackageName"
# Target platform identifiers (case-insensitive). Currently supported platforms are: macos, ios
platforms = ["ios", "macos"]
# ...Target platforms may also be set in workspace-level Cargo.toml under a [workspace.metadata.swiftpackage] instead.
Copyright 2023 Antonius Naumann
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Copyright (c) 2023 Antonius Naumann
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