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//! We setup RUSTC_WRAPPER to point to `rust-analyzer` binary itself during the
//! initial `cargo check`. That way, we avoid checking the actual project, and
//! only build proc macros and build.rs.
//!
//! Code taken from IntelliJ :0)
//! https://github.com/intellij-rust/intellij-rust/blob/master/native-helper/src/main.rs
use std::{
ffi::OsString,
io,
process::{Command, Stdio},
};
/// ExitCode/ExitStatus are impossible to create :(.
pub(crate) struct ExitCode(pub(crate) Option<i32>);
pub(crate) fn run_rustc_skipping_cargo_checking(
rustc_executable: OsString,
args: Vec<OsString>,
) -> io::Result<ExitCode> {
let is_cargo_check = args.iter().any(|arg| {
let arg = arg.to_string_lossy();
// `cargo check` invokes `rustc` with `--emit=metadata` argument.
//
// https://doc.rust-lang.org/rustc/command-line-arguments.html#--emit-specifies-the-types-of-output-files-to-generate
// link — Generates the crates specified by --crate-type. The default
// output filenames depend on the crate type and platform. This
// is the default if --emit is not specified.
// metadata — Generates a file containing metadata about the crate.
// The default output filename is CRATE_NAME.rmeta.
arg.starts_with("--emit=") && arg.contains("metadata") && !arg.contains("link")
});
if is_cargo_check {
return Ok(ExitCode(Some(0)));
}
run_rustc(rustc_executable, args)
}
fn run_rustc(rustc_executable: OsString, args: Vec<OsString>) -> io::Result<ExitCode> {
let mut child = Command::new(rustc_executable)
.args(args)
.stdin(Stdio::inherit())
.stdout(Stdio::inherit())
.stderr(Stdio::inherit())
.spawn()?;
Ok(ExitCode(child.wait()?.code()))
}
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