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Determine rust channel by parsing rustc output if env vars do not exist #163

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merged 3 commits into from
Jul 19, 2024
Merged

Determine rust channel by parsing rustc output if env vars do not exist #163

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a2ef942
Determine rust channel by parsing rustc output
itsCryne Jul 12, 2024
3a1d52d
Check env vars first, fall back to rustc in $PATH
itsCryne Jul 13, 2024
acd1a64
Try to check RUSTUP_TOOLCHAIN first
itsCryne Jul 13, 2024
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22 changes: 19 additions & 3 deletions azalea/build.rs
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Original file line number Diff line number Diff line change
@@ -1,8 +1,24 @@
use std::env;
use std::process::Command;

fn main() {
let rust_toolchain = env::var("RUSTUP_TOOLCHAIN").unwrap();
if rust_toolchain.starts_with("stable") {
panic!("Azalea currently requires nightly Rust. You can use `rustup override set nightly` to set the toolchain for this directory.");
match env::var("RUSTUP_TOOLCHAIN") {
Ok(rust_toolchain) if !rust_toolchain.starts_with("nightly") => { // stable & beta
panic!("Azalea currently requires nightly Rust. You can use `rustup override set nightly` to set the toolchain for this directory.");
}
Ok(_) => return, // nightly
Err(_) => { // probably not installed via rustup, run rustc and parse its output
let rustc_command = env::var("RUSTC")
.or_else(|_| env::var("CARGO_BUILD_RUSTC"))
.unwrap_or(String::from("rustc"));
let rustc_version_output = Command::new(rustc_command).arg("-V").output().unwrap();
if !rustc_version_output.status.success()
|| !String::from_utf8(rustc_version_output.stdout)
.unwrap()
.contains("nightly")
{
panic!("Azalea currently requires nightly Rust. It seems that you did not install Rust via rustup. Please check the documentation for your installation method, to find out how to use nightly Rust.");
}
}
}
}
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