I am trying to build an example "Marco Polo" game using Rust with GitHub's Codespaces. I am following an example from Week 1 of Coursera's "Data Engineering with Rust" course. However, the vesion
of rustc in my codespaces is no longer sufficient for the current version of clap_builder, which seems to be required. My Cargo.toml file is as follows:
[package]
name = "hello_marco"
version = "0.1.0"
edition = "2021"
# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
[dependencies]
clap = {version="4.0.32", features=["derive"]}
which matches the one given in the lesson. But, when I run it, I get this error:
error: package `clap_derive v4.5.0` cannot be built because it requires rustc 1.74 or newer, while the currently active rustc version is 1.70.0
Either upgrade to rustc 1.74 or newer, or use
cargo update -p [email protected] --precise ver
where `ver` is the latest version of `clap_derive` supporting rustc 1.70.0
I do not seem to be able to update my version of rustc:
@me ➜ /workspaces/MarcoPolo2/hello_marco (main) $ rustup update
info: no updatable toolchains installed
info: checking for self-update
info: downloading self-update
info: cleaning up downloads & tmp directories
@me ➜ /workspaces/MarcoPolo2/hello_marco (main) $ rustc --version
rustc 1.70.0 (90c541806 2023-05-31)
When I look at the Clap ChangeLog it appears as though v 4.3.24 is the first one to support my current rust compiler (assuming that this is what msrv [minimum supported rust version] means]). I was able (I believe) to successfully downgrade my version of clap by
@me ➜ /workspaces/MarcoPolo2/hello_marco (main) $ cargo update -p [email protected] --precise 4.3.24
But, I still want to know how can I force my codespaces environment to use the more recent rustc.
