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main.rs
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main.rs
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#![warn(rust_2018_idioms)]
#![warn(unused_lifetimes)]
#![warn(unreachable_pub)]
use std::path::PathBuf;
use std::{env, process};
use self::utils::Compiler;
mod abi_cafe;
mod bench;
mod build_backend;
mod build_sysroot;
mod config;
mod path;
mod prepare;
mod rustc_info;
mod shared_utils;
mod tests;
mod utils;
fn usage() {
eprintln!("{}", include_str!("usage.txt"));
}
macro_rules! arg_error {
($($err:tt)*) => {{
eprintln!($($err)*);
usage();
std::process::exit(1);
}};
}
#[derive(PartialEq, Debug)]
enum Command {
Prepare,
Build,
Test,
AbiCafe,
Bench,
}
#[derive(Copy, Clone, Debug)]
enum SysrootKind {
None,
Clif,
Llvm,
}
#[derive(Clone, Debug)]
enum CodegenBackend {
Local(PathBuf),
Builtin(String),
}
fn main() {
if env::var_os("RUST_BACKTRACE").is_none() {
env::set_var("RUST_BACKTRACE", "1");
}
env::set_var("CG_CLIF_DISABLE_INCR_CACHE", "1");
// Force incr comp even in release mode unless in CI or incremental builds are explicitly disabled
if env::var_os("CARGO_BUILD_INCREMENTAL").is_none() {
env::set_var("CARGO_BUILD_INCREMENTAL", "true");
}
let mut args = env::args().skip(1);
let command = match args.next().as_deref() {
Some("prepare") => Command::Prepare,
Some("build") => Command::Build,
Some("test") => Command::Test,
Some("abi-cafe") => Command::AbiCafe,
Some("bench") => Command::Bench,
Some(flag) if flag.starts_with('-') => arg_error!("Expected command found flag {}", flag),
Some(command) => arg_error!("Unknown command {}", command),
None => {
usage();
process::exit(0);
}
};
let mut out_dir = PathBuf::from(".");
let mut download_dir = None;
let mut sysroot_kind = SysrootKind::Clif;
let mut use_unstable_features = true;
let mut frozen = false;
let mut skip_tests = vec![];
let mut use_backend = None;
while let Some(arg) = args.next().as_deref() {
match arg {
"--out-dir" => {
out_dir = PathBuf::from(args.next().unwrap_or_else(|| {
arg_error!("--out-dir requires argument");
}));
}
"--download-dir" => {
download_dir = Some(PathBuf::from(args.next().unwrap_or_else(|| {
arg_error!("--download-dir requires argument");
})));
}
"--sysroot" => {
sysroot_kind = match args.next().as_deref() {
Some("none") => SysrootKind::None,
Some("clif") => SysrootKind::Clif,
Some("llvm") => SysrootKind::Llvm,
Some(arg) => arg_error!("Unknown sysroot kind {}", arg),
None => arg_error!("--sysroot requires argument"),
}
}
"--no-unstable-features" => use_unstable_features = false,
"--frozen" => frozen = true,
"--skip-test" => {
// FIXME check that all passed in tests actually exist
skip_tests.push(args.next().unwrap_or_else(|| {
arg_error!("--skip-test requires argument");
}));
}
"--use-backend" => {
use_backend = Some(match args.next() {
Some(name) => name,
None => arg_error!("--use-backend requires argument"),
});
}
flag if flag.starts_with("-") => arg_error!("Unknown flag {}", flag),
arg => arg_error!("Unexpected argument {}", arg),
}
}
let current_dir = std::env::current_dir().unwrap();
out_dir = current_dir.join(out_dir);
if command == Command::Prepare {
prepare::prepare(&path::Dirs {
source_dir: current_dir.clone(),
download_dir: download_dir
.map(|dir| current_dir.join(dir))
.unwrap_or_else(|| out_dir.join("download")),
build_dir: PathBuf::from("dummy_do_not_use"),
dist_dir: PathBuf::from("dummy_do_not_use"),
frozen,
});
process::exit(0);
}
let rustup_toolchain_name = match (env::var("CARGO"), env::var("RUSTC"), env::var("RUSTDOC")) {
(Ok(_), Ok(_), Ok(_)) => None,
(_, Err(_), Err(_)) => Some(rustc_info::get_toolchain_name()),
vars => {
eprintln!(
"If RUSTC or RUSTDOC is set, both need to be set and in addition CARGO needs to be set: {vars:?}"
);
process::exit(1);
}
};
let bootstrap_host_compiler = {
let cargo = rustc_info::get_cargo_path();
let rustc = rustc_info::get_rustc_path();
let rustdoc = rustc_info::get_rustdoc_path();
let triple = std::env::var("HOST_TRIPLE")
.ok()
.or_else(|| config::get_value("host"))
.unwrap_or_else(|| rustc_info::get_host_triple(&rustc));
Compiler {
cargo,
rustc,
rustdoc,
rustflags: vec![],
rustdocflags: vec![],
triple,
runner: vec![],
}
};
let target_triple = std::env::var("TARGET_TRIPLE")
.ok()
.or_else(|| config::get_value("target"))
.unwrap_or_else(|| bootstrap_host_compiler.triple.clone());
let dirs = path::Dirs {
source_dir: current_dir.clone(),
download_dir: download_dir
.map(|dir| current_dir.join(dir))
.unwrap_or_else(|| out_dir.join("download")),
build_dir: out_dir.join("build"),
dist_dir: out_dir.join("dist"),
frozen,
};
path::RelPath::BUILD.ensure_exists(&dirs);
{
// Make sure we always explicitly specify the target dir
let target =
path::RelPath::BUILD.join("target_dir_should_be_set_explicitly").to_path(&dirs);
env::set_var("CARGO_TARGET_DIR", &target);
let _ = std::fs::remove_file(&target);
std::fs::File::create(target).unwrap();
}
env::set_var("RUSTC", "rustc_should_be_set_explicitly");
env::set_var("RUSTDOC", "rustdoc_should_be_set_explicitly");
let cg_clif_dylib = if let Some(name) = use_backend {
CodegenBackend::Builtin(name)
} else {
CodegenBackend::Local(build_backend::build_backend(
&dirs,
&bootstrap_host_compiler,
use_unstable_features,
))
};
match command {
Command::Prepare => {
// Handled above
}
Command::Test => {
tests::run_tests(
&dirs,
sysroot_kind,
use_unstable_features,
&skip_tests.iter().map(|test| &**test).collect::<Vec<_>>(),
&cg_clif_dylib,
&bootstrap_host_compiler,
rustup_toolchain_name.as_deref(),
target_triple.clone(),
);
}
Command::AbiCafe => {
if bootstrap_host_compiler.triple != target_triple {
eprintln!("Abi-cafe doesn't support cross-compilation");
process::exit(1);
}
abi_cafe::run(
sysroot_kind,
&dirs,
&cg_clif_dylib,
rustup_toolchain_name.as_deref(),
&bootstrap_host_compiler,
);
}
Command::Build => {
build_sysroot::build_sysroot(
&dirs,
sysroot_kind,
&cg_clif_dylib,
&bootstrap_host_compiler,
rustup_toolchain_name.as_deref(),
target_triple,
);
}
Command::Bench => {
build_sysroot::build_sysroot(
&dirs,
sysroot_kind,
&cg_clif_dylib,
&bootstrap_host_compiler,
rustup_toolchain_name.as_deref(),
target_triple,
);
bench::benchmark(&dirs, &bootstrap_host_compiler);
}
}
}