28 lines
928 B
Rust
28 lines
928 B
Rust
//! Determine rustc version `proc-macro-srv` (and thus the sysroot ABI) is
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//! build with and make it accessible at runtime for ABI selection.
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use std::{env, fs::File, io::Write, path::PathBuf, process::Command};
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fn main() {
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println!("cargo:rustc-check-cfg=cfg(rust_analyzer)");
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let mut path = PathBuf::from(env::var_os("OUT_DIR").unwrap());
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path.push("rustc_version.rs");
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let mut f = File::create(&path).unwrap();
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let rustc = env::var("RUSTC").expect("proc-macro-srv's build script expects RUSTC to be set");
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let output = Command::new(rustc).arg("--version").output().expect("rustc --version must run");
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let version_string = std::str::from_utf8(&output.stdout[..])
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.expect("rustc --version output must be UTF-8")
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.trim();
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write!(
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f,
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"
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#[allow(dead_code)]
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pub(crate) const RUSTC_VERSION_STRING: &str = {version_string:?};
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"
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)
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.unwrap();
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}
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