1 //! We setup RUSTC_WRAPPER to point to `rust-analyzer` binary itself during the
2 //! initial `cargo check`. That way, we avoid checking the actual project, and
3 //! only build proc macros and build.rs.
5 //! Code taken from IntelliJ :0)
6 //! https://github.com/intellij-rust/intellij-rust/blob/master/native-helper/src/main.rs
10 process::{Command, Stdio},
13 /// ExitCode/ExitStatus are impossible to create :(.
14 pub(crate) struct ExitCode(pub(crate) Option<i32>);
16 pub(crate) fn run_rustc_skipping_cargo_checking(
17 rustc_executable: OsString,
19 ) -> io::Result<ExitCode> {
20 // `CARGO_CFG_TARGET_ARCH` is only set by cargo when executing build scripts
21 // We don't want to exit out checks unconditionally with success if a build
22 // script tries to invoke checks themselves
23 // See https://github.com/rust-lang/rust-analyzer/issues/12973 for context
24 let not_invoked_by_build_script = std::env::var_os("CARGO_CFG_TARGET_ARCH").is_none();
25 let is_cargo_check = args.iter().any(|arg| {
26 let arg = arg.to_string_lossy();
27 // `cargo check` invokes `rustc` with `--emit=metadata` argument.
29 // https://doc.rust-lang.org/rustc/command-line-arguments.html#--emit-specifies-the-types-of-output-files-to-generate
30 // link — Generates the crates specified by --crate-type. The default
31 // output filenames depend on the crate type and platform. This
32 // is the default if --emit is not specified.
33 // metadata — Generates a file containing metadata about the crate.
34 // The default output filename is CRATE_NAME.rmeta.
35 arg.starts_with("--emit=") && arg.contains("metadata") && !arg.contains("link")
37 if not_invoked_by_build_script && is_cargo_check {
38 return Ok(ExitCode(Some(0)));
40 run_rustc(rustc_executable, args)
43 fn run_rustc(rustc_executable: OsString, args: Vec<OsString>) -> io::Result<ExitCode> {
44 let mut child = Command::new(rustc_executable)
46 .stdin(Stdio::inherit())
47 .stdout(Stdio::inherit())
48 .stderr(Stdio::inherit())
50 Ok(ExitCode(child.wait()?.code()))