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|
//! Shim which is passed to Cargo as "rustdoc" when running the bootstrap.
//!
//! See comments in `src/bootstrap/rustc.rs` for more information.
use std::env;
use std::ffi::OsString;
use std::path::PathBuf;
use std::process::Command;
include!("../dylib_util.rs");
fn main() {
let args = env::args_os().skip(1).collect::<Vec<_>>();
let stage = env::var("RUSTC_STAGE").expect("RUSTC_STAGE was not set");
let rustdoc = env::var_os("RUSTDOC_REAL").expect("RUSTDOC_REAL was not set");
let libdir = env::var_os("RUSTDOC_LIBDIR").expect("RUSTDOC_LIBDIR was not set");
let sysroot = env::var_os("RUSTC_SYSROOT").expect("RUSTC_SYSROOT was not set");
// Detect whether or not we're a build script depending on whether --target
// is passed (a bit janky...)
let target = args.windows(2).find(|w| &*w[0] == "--target").and_then(|w| w[1].to_str());
use std::str::FromStr;
let verbose = match env::var("RUSTC_VERBOSE") {
Ok(s) => usize::from_str(&s).expect("RUSTC_VERBOSE should be an integer"),
Err(_) => 0,
};
let mut dylib_path = dylib_path();
dylib_path.insert(0, PathBuf::from(libdir.clone()));
let mut cmd = Command::new(rustdoc);
if target.is_some() {
// The stage0 compiler has a special sysroot distinct from what we
// actually downloaded, so we just always pass the `--sysroot` option,
// unless one is already set.
if !args.iter().any(|arg| arg == "--sysroot") {
cmd.arg("--sysroot").arg(&sysroot);
}
}
cmd.args(&args);
cmd.env(dylib_path_var(), env::join_paths(&dylib_path).unwrap());
// Force all crates compiled by this compiler to (a) be unstable and (b)
// allow the `rustc_private` feature to link to other unstable crates
// also in the sysroot.
if env::var_os("RUSTC_FORCE_UNSTABLE").is_some() {
cmd.arg("-Z").arg("force-unstable-if-unmarked");
}
if let Some(linker) = env::var_os("RUSTDOC_LINKER") {
let mut arg = OsString::from("-Clinker=");
arg.push(&linker);
cmd.arg(arg);
}
if env::var_os("RUSTDOC_FUSE_LD_LLD").is_some() {
cmd.arg("-Clink-arg=-fuse-ld=lld");
if cfg!(windows) {
cmd.arg("-Clink-arg=-Wl,/threads:1");
} else {
cmd.arg("-Clink-arg=-Wl,--threads=1");
}
}
// Cargo doesn't pass RUSTDOCFLAGS to proc_macros:
// https://github.com/rust-lang/cargo/issues/4423
// Thus, if we are on stage 0, we explicitly set `--cfg=bootstrap`.
// We also declare that the flag is expected, which we need to do to not
// get warnings about it being unexpected.
if stage == "0" {
cmd.arg("--cfg=bootstrap");
}
cmd.arg("-Zunstable-options");
cmd.arg("--check-cfg=values(bootstrap)");
if verbose > 1 {
eprintln!(
"rustdoc command: {:?}={:?} {:?}",
dylib_path_var(),
env::join_paths(&dylib_path).unwrap(),
cmd,
);
eprintln!("sysroot: {:?}", sysroot);
eprintln!("libdir: {:?}", libdir);
}
std::process::exit(match cmd.status() {
Ok(s) => s.code().unwrap_or(1),
Err(e) => panic!("\n\nfailed to run {:?}: {}\n\n", cmd, e),
})
}
|
