use_msrv: Set the minimum supported rust version (MSRV)

In rextendr: Call Rust Code from R using the 'extendr' Crate

Set the minimum supported rust version (MSRV)

Description

use_msrv() sets the minimum supported rust version for your R package.

Usage

use_msrv(version, path = ".", overwrite = FALSE)

Arguments

version	character scalar, the minimum supported Rust version.
path	character scalar, path to folder containing DESCRIPTION file.
overwrite	default FALSE. Overwrites the SystemRequirements field if already set when TRUE.

Details

The minimum supported rust version (MSRV) is determined by the SystemRequirements field in a package's DESCRIPTION file. For example, to set the MSRV to ⁠1.67.0⁠, the SystemRequirements must have ⁠rustc >= 1.67.0⁠.

By default, there is no MSRV set. However, some crates have features that depend on a minimum version of Rust. As of this writing the version of Rust on CRAN's Fedora machine's is 1.69. If you require a version of Rust that is greater than that, you must set it in your DESCRIPTION file.

It is also important to note that if CRAN's machines do not meet the specified MSRV, they will not be able to build a binary of your package. As a consequence, if users try to install the package they will be required to have Rust installed as well.

To determine the MSRV of your R package, we recommend installing the cargo-msrv cli. You can do so by running ⁠cargo install cargo-msrv⁠. To determine your MSRV, set your working directory to src/rust then run ⁠cargo msrv⁠. Note that this may take a while.

For more details, please see cargo-msrv.

Value

version

Examples

## Not run: 
use_msrv("1.67.1")

## End(Not run)

rextendr documentation built on Aug. 26, 2025, 5:09 p.m.